CN108581268A - The process that a kind of soldered fitting and its preparation process and Thermal Fatigue Damage measure - Google Patents
The process that a kind of soldered fitting and its preparation process and Thermal Fatigue Damage measure Download PDFInfo
- Publication number
- CN108581268A CN108581268A CN201810370403.3A CN201810370403A CN108581268A CN 108581268 A CN108581268 A CN 108581268A CN 201810370403 A CN201810370403 A CN 201810370403A CN 108581268 A CN108581268 A CN 108581268A
- Authority
- CN
- China
- Prior art keywords
- bni
- soldered fitting
- thermal fatigue
- fatigue
- solders
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000006378 damage Effects 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 230000008569 process Effects 0.000 title claims abstract description 16
- 229910000679 solder Inorganic materials 0.000 claims abstract description 35
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- 238000013001 point bending Methods 0.000 claims abstract description 18
- 238000009661 fatigue test Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims description 50
- 238000005219 brazing Methods 0.000 claims description 36
- 239000002131 composite material Substances 0.000 claims description 31
- 208000025599 Heat Stress disease Diseases 0.000 claims description 30
- 238000012360 testing method Methods 0.000 claims description 15
- 238000002474 experimental method Methods 0.000 claims description 10
- 238000004458 analytical method Methods 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 8
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000003032 molecular docking Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 4
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 3
- 229910000366 copper(II) sulfate Inorganic materials 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 238000005530 etching Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 238000011068 loading method Methods 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 claims description 2
- 239000006071 cream Substances 0.000 claims 1
- 208000037656 Respiratory Sounds Diseases 0.000 abstract description 13
- 239000000203 mixture Substances 0.000 abstract description 4
- 239000010949 copper Substances 0.000 description 62
- 238000002791 soaking Methods 0.000 description 9
- 239000011888 foil Substances 0.000 description 7
- 230000008901 benefit Effects 0.000 description 5
- 238000011049 filling Methods 0.000 description 5
- 238000005476 soldering Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000009736 wetting Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000001291 vacuum drying Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000555268 Dendroides Species 0.000 description 1
- 206010052428 Wound Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000005713 exacerbation Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 210000000867 larynx Anatomy 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3033—Ni as the principal constituent
- B23K35/304—Ni as the principal constituent with Cr as the next major constituent
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention discloses a kind of 2 solders of soldered fitting BNi, and elemental composition by weight percentage includes：Cr6 8%, Si4 5%, B2.75 3.5%, Fe2.5 3.5%, surplus Ni.Invention additionally discloses the processes that a kind of preparation method of soldered fitting and Thermal Fatigue Damage measure.By the thermal fatigue test for carrying out cycle-index 0 time, 100 times, 150 times and 200 times to soldered fitting, show the room temperature four-point bending strength reduction of the increase soldered fitting with cycle-index, there is crackle in brazed seam center after being embodied in 100 cycles, there is a plurality of fatigue crack simultaneously on brazed seam region and 18 8 steel after 150 cycles, region is sealed after 200 cycles entirely and a parallel long crack with brazed seam direction occurs, occurs apparent crackle grid on 18 8 steel, fatigue damage is more serious.
Description
Technical field
The present invention relates to the researchs of metal material thermal fatigue property, more particularly to a kind of soldered fitting and its preparation process
The process measured with Thermal Fatigue Damage.
Background technology
W-Cu composite materials combine the plurality of advantages of W and Cu, have high intensity, hardness, good electrical and thermal conductivity performance,
The advantages that low coefficient of thermal expansion, good resistance to arc erosion, high-temperature oxidation, resistance fusion welding and dimensional stability.
Aerospace, auto industry, machinery, the energy, electronics and military and national defense field are widely used.W-Cu composite materials are not
It is only used as high temperature resistant connector, heat dissipation substrate, heat sink material and contact material, also as the larynx lining of rocket, guided missile jet pipe, spray
The high-temperature components such as mouth, jet vane.W-Cu composite materials and 18-8 steel have good complementation in performance, using vacuum brazing
Soldered fitting, which is made, in W-Cu composite materials and 18-8 steel by technology can give full play of the advantage performance of the two.With science skill
The application scenario of the development of art, W-Cu composite materials just constantly expands.For example, used in divertor towards plasma material
Material and heat sink material, after decades of development, the W and W- generally used till now via earliest copper and copper alloy
Cu alloys, and the structural material in divertor generally uses stainless steel at present.It can be found that W-Cu composite materials and 18-8 drill rods
Plumb joint is presently mainly to be used in complicated hot environment, and connector is subjected to very high thermal stress during being on active service,
W-Cu composite materials need have good thermal fatigue property and mechanical behavior under high temperature with 18-8 drill rod plumb joints.
Invention content
Goal of the invention：It is of the existing technology in order to solve the problems, such as, technical problem to be solved by the invention is to provide
A kind of soldered fitting BNi-2 solders.
Also there is provided a kind of W- containing the soldered fitting BNi-2 solders for technical problems to be solved by the present invention
Cu/BNi-2/18-8 drill rod plumb joints.
Also there is provided the preparation methods of W-Cu/BNi-2/18-8 drill rod plumb joints for technical problems to be solved by the present invention.
The present invention also technical problems to be solved there is provided W-Cu/BNi-2/18-8 drill rod plumb joints in thermal fatigue
Application in terms of energy design technology.
In order to better adapt to complicated working environment, the service life of soldered fitting is improved, the present invention will finally solve
The problem of be by W-Cu composite materials and 18-8 steel success soldering connection on the basis of, the thermal fatigue property of soldered fitting is set
Meter process is studied.
Technical solution：To achieve the goals above, present invention technical solution to be taken is as follows：The present invention provides one
Kind soldered fitting BNi-2 solders, the soldered fitting BNi-2 solders include following element by weight percentage：Cr6-8%,
Si4-5%, B2.75-3.5%, Fe2.5-3.5%, surplus Ni.
Preferably, the soldered fitting BNi-2 solders include following element by weight percentage：Cr6%,
Si5%, B3.5%, Fe3.5%, surplus Ni.
The content of present invention further includes a kind of W-Cu/BNi-2/18-8 drill rods containing the soldered fitting BNi-2 solders
Plumb joint.
The content of present invention further includes the preparation method of the W-Cu/BNi-2/18-8 drill rod plumb joints, including following step
Suddenly：Base material W-Cu composite materials are placed in top, base material 18-8 steel is placed below, and BNi-2 solders are placed between two base materials, connector
Form is put into after clamping in the brazing jig specially made using docking, and fixture pressure head applies one to W-Cu composite materials
Constant-pressure, vacuum brazing experiment are more than 5 × 10 in vacuum degree-3It carries out, 1010 DEG C -1180 DEG C of brazing temperature, keeps the temperature under Pa environment
20~40min of time.
Wherein, preferably, base material W-Cu composite materials and 18-8 steel dimensions are 20mm × 20mm × 5mm, BNi-2
Foil strip brazing material size is 20mm × 5mm, 1060 DEG C of brazing temperature, soaking time 30min.
The content of present invention further includes the W-Cu/BNi-2/18-8 drill rods plumb joint in thermal fatigue property design technology side
The application in face.
The content of present invention further includes a kind of process that soldered fitting Thermal Fatigue Damage measures, and is included the following steps：
1) brazed coupon is cut into several 40mm × 6mm × 5mm small samples using linear cutting equipment, and in 18-8 steel
The circular hole of an a diameter of 5mm is bored in upper end at brazed seam 15mm, that is, heat fatigue sample is made.
2) the heat fatigue sample prepared is hung on special test fixture, then fixes heat fatigue sample and fixture
Start thermal fatigue test on thermal fatigue tester；
3) heat fatigue sample is prepared as metallographic specimen and carries out heat fatigue test：Abrasive paper for metallograph, diamond are used first
Abrasive pastes, polishing cloth are ground and polish to heat fatigue sample, are then cleaned simultaneously to sample with absolute alcohol or acetone
Drying finally corrodes the brazed seam of sample and neighbouring base material using prepared corrosive liquid, etching time 10-15s；
Observation analysis is carried out to the microstructure of different cycle-index rear joints by scanning electron microscope and electron spectrometer, discloses heat fatigue
The variation characteristic of fatigue damage occurs for soldered fitting microstructure afterwards；
4) residual mechanical properties of soldered fitting are evaluated using room temperature four-point bending intensity after heat fatigue test, are passed through
Scanning electron microscope and electron spectrometer carry out observation analysis to the bending fracture apperance of different cycle-index rear joints, establish heat fatigue
The flexural fracture characteristic of soldered fitting afterwards.
Wherein, above-mentioned steps 1) heat fatigue sample be W-Cu/BNi-2/18-8 drill rod plumb joints cutting gained.
Wherein, above-mentioned steps 2) metallographic specimen size be 40mm × 6mm × 5mm.
Wherein, above-mentioned steps 2) corrosive liquid selection H2O：HCl：CuSO4=50ml：50ml：10g.
Wherein, above-mentioned steps 2) or step 3) cycle-index 0~200 time, ceiling temperature is 400 DEG C, and lower limit temperature is
20℃。
Wherein, above-mentioned steps 3) bending strength carry out evaluation start before need to each side of bend specimen carry out 0.2-0.4mm fall
Fillet is put into four-point bending fixture after chamfering, is tested by electronic universal tester load, wherein pressure head loading speed
For 0.5mm/min.The bend specimen size is 40mm × 6mm × 5mm.Each soldered fitting prepares 3 under same loop number
Bend specimen carries out crooked experiment, and 3 groups of intensity values of gained are averaged as final bending strength value after experiment.It is logical
It over-scans Electronic Speculum and electron spectrometer and observation analysis is carried out to the bending fracture apperance of different cycle-index rear joints, it is tired to establish heat
The flexural fracture characteristic of soldered fitting after labor.
The thermal fatigue test apparatus that the present invention uses is suitable for the thermal fatigue test of various welding points and sheet metal.It should
Equipment is mainly made of heating system, cooling system, jacking system, control system and five part of sample rotary system.Have
Easy to operate, high degree of automation, accuracy of temperature control be high, require low to test panels and to possess a set of rotary system etc. a series of
Function and feature.Heat fatigue technological parameter is 400 DEG C of ceiling temperature, soaking time 20min, 20 DEG C of lower limit temperature, soaking time
2min。
Advantageous effect：Compared with prior art, the present invention has the following advantages：
(1) 1010 DEG C -1180 DEG C of the BNi-2 solder brazings temperature that the present invention selects, brazing filler metal melts moderate temperature, solder are molten
Change uniformly, beneficial element contained in solder makes solder have good wetability and spreadability, the soldering of acquisition to base material
Strength of joint is high, and corrosion resistance is good, is entirely capable of in complex environment.
(2) the W-Cu composite materials and 18-8 stainless steels that the present invention selects realize complementation in performance.Soldering processes are simple
Rationally, using method for welding in vacuum drying oven, brazing process need not addition brazing flux or other safeguard measures.Exist in the brazed seam of formation
Apparent diffusion layer, no microfissure, stomata and the defects of be mingled with.A large amount of Ni-based solid solution can reduce connector remnants in brazed seam
Stress, and Ni-based solid solution has good plasticity and hardness so that connector has higher bending strength.
(3) heat fatigue equipment accuracy of temperature control used in the present invention is high, and high degree of automation is easy to operate, sample rotary system
Keep institute's test specimens heated and cooling uniform.Test parameters setting range is wide, is damaged to the heat fatigue of soldered fitting internal microstructure
The residual mechanical properties test accuracy of wound and heat fatigue rear joint is high.
(4) present invention uses the test method of series of standards, the accurate measurement of SEM and four-point bending intensity value and meter
Point counting from microcosmic and numerical value angle, does not elaborate the degree of Thermal Fatigue Damage so that the present invention more has convincingness.
Description of the drawings
Fig. 1 is the structural schematic diagram of heat fatigue sample：Size be 40mm × 6mm × 5mm, wherein 18-8 steel upper end away from
From the circular hole for boring an a diameter of 5mm at brazed seam 15mm.
Fig. 2 is thermal fatigue tester used；
Fig. 3 is the soldered fitting microscopic structure for not carrying out Thermal Fatigue Damage experiment；
Fig. 4 is soldered fitting microscopic structure after 100 Thermal Fatigue Damage test cycles；
Fig. 5 is soldered fitting microscopic structure after 150 Thermal Fatigue Damage test cycles；
Fig. 6 is soldered fitting microscopic structure after 200 Thermal Fatigue Damage test cycles；
Fig. 7 is soldered fitting microscopic structure Thermal Fatigue Damage schematic diagram；
Fig. 8 is room temperature four-point bending test schematic diagram.
Specific implementation mode
The present invention is further described below in conjunction with the accompanying drawings.
Base material employed in the specific implementation mode of the present invention is W-Cu composite materials and 18-8 stainless steels, and the two is in property
It is complementary that realization can be gone up.Solder is BNi-2 solders, 1010 DEG C -1180 DEG C of brazing temperature, brazing filler metal melts moderate temperature, brazing filler metal melts
Uniformly, beneficial element contained in solder makes solder there is good wetability and spreadability, the soldering of acquisition to connect base material
Head intensity is high, and corrosion resistance is good, is entirely capable of in complex environment.Soldering processes advantages of simple, using method for welding in vacuum drying oven,
Brazing process need not addition brazing flux or other safeguard measures.
The preparation of embodiment 1W-Cu/BNi-2/18-8 drill rod plumb joints
The preparation method of W-Cu/BNi-2/18-8 drill rod plumb joints, includes the following steps：Base material W-Cu composite materials are set
In top, base material 18-8 steel is placed below, and BNi-2 solders are placed between two base materials, and joint form is using docking, after clamping
It is put into the brazing jig specially made, fixture pressure head applies about 50KPa pressure to W-Cu composite materials, it is therefore an objective to make solder pair
The wetting and filling of base material are more abundant, and vacuum brazing experiment is more than 5 × 10 in vacuum degree-3It is carried out under Pa environment, brazing temperature
1060 DEG C, soaking time 30min.Base material W-Cu composite materials and 18-8 steel dimensions are 20mm × 20mm × 5mm, BNi-2 foils
Strip brazing material size is 20mm × 5mm, and soldered fitting BNi-2 solders are made of following element by weight percentage：Cr6%,
Si5%, B3.5%, Fe3.5%, surplus Ni.
The preparation of embodiment 2W-Cu/BNi-2/18-8 drill rod plumb joints
The preparation method of W-Cu/BNi-2/18-8 drill rod plumb joints, includes the following steps：Base material W-Cu composite materials are set
In top, base material 18-8 steel is placed below, and BNi-2 solders are placed between two base materials, and joint form is using docking, after clamping
It is put into the brazing jig specially made, fixture pressure head applies about 50KPa pressure to W-Cu composite materials, it is therefore an objective to make solder pair
The wetting and filling of base material are more abundant, and vacuum brazing experiment is more than 5 × 10 in vacuum degree-3It is carried out under Pa environment, brazing temperature
1010 DEG C, soaking time 40min.Base material W-Cu composite materials and 18-8 steel dimensions are 20mm × 20mm × 5mm, BNi-2 foils
Strip brazing material size is 20mm × 5mm, and base material W-Cu composite materials and 18-8 steel dimensions are 20mm × 20mm × 5mm, BNi-
2 foil strip brazing material sizes are 20mm × 5mm, and the elemental composition of soldered fitting BNi-2 solders by weight percentage includes：
Cr8%, Si4%, B2.75%, Fe2.5%, surplus Ni.
The preparation of embodiment 3W-Cu/BNi-2/18-8 drill rod plumb joints
The preparation method of W-Cu/BNi-2/18-8 drill rod plumb joints, includes the following steps：Base material W-Cu composite materials are set
In top, base material 18-8 steel is placed below, and BNi-2 solders are placed between two base materials, and joint form is using docking, after clamping
It is put into the brazing jig specially made, fixture pressure head applies about 50KPa pressure to W-Cu composite materials, it is therefore an objective to make solder pair
The wetting and filling of base material are more abundant, and vacuum brazing experiment is more than 5 × 10 in vacuum degree-3It is carried out under Pa environment, brazing temperature
1180 DEG C, soaking time 20min.Base material W-Cu composite materials and 18-8 steel dimensions are 20mm × 20mm × 5mm, BNi-2 foils
Strip brazing material size is 20mm × 5mm, and base material W-Cu composite materials and 18-8 steel dimensions are 20mm × 20mm × 5mm, BNi-
2 foil strip brazing material sizes are 20mm × 5mm, and the elemental composition of soldered fitting BNi-2 solders by weight percentage includes：
Cr7%, Si4.5%, B3%, Fe3%, surplus Ni.
The preparation of embodiment 4W-Cu/BNi-2/18-8 drill rod plumb joints
The preparation method of W-Cu/BNi-2/18-8 drill rod plumb joints, includes the following steps：Base material W-Cu composite materials are set
In top, base material 18-8 steel is placed below, and BNi-2 solders are placed between two base materials, and joint form is using docking, after clamping
It is put into the brazing jig specially made, fixture pressure head applies about 50KPa pressure to W-Cu composite materials, it is therefore an objective to make solder pair
The wetting and filling of base material are more abundant, and vacuum brazing experiment is more than 5 × 10 in vacuum degree-3It is carried out under Pa environment, brazing temperature
1095 DEG C, soaking time 30min.Base material W-Cu composite materials and 18-8 steel dimensions are 20mm × 20mm × 5mm, BNi-2 foils
Strip brazing material size is 20mm × 5mm, and soldered fitting BNi-2 solders are made of following element by weight percentage：Cr6%,
Si5%, B3.5%, Fe3.5%, surplus Ni.
The process that experimental example drill rod plumb joint is measured in Thermal Fatigue Damage
1) W-Cu/BNi-2/18-8 drill rod plumb joints prepared by Examples 1 to 4 are cut into respectively using linear cutting equipment
Several 40mm × 6mm × 5mm small samples, and the circular hole of an a diameter of 5mm is bored in 18-8 steel upper end at brazed seam 15mm, that is, it makes
At heat fatigue sample.
2) the heat fatigue sample prepared is hung on special test fixture, it is tired that sample and fixture are then fixed on heat
Start thermal fatigue test on labor testing machine.Heat fatigue sample is prepared as metallographic specimen, metallographic specimen size be 40mm × 6mm ×
5mm.The preparation process of metallographic specimen is：Use abrasive paper for metallograph, diamond paste, polishing cloth etc. respectively to embodiment 1 first
~4 W-Cu/BNi-2/18-8 drill rod plumb joint samples prepared are ground and polish respectively, then use absolute alcohol or acetone
Sample is cleaned and is dried up, finally the brazed seam of sample and neighbouring base material are corroded using prepared corrosive liquid,
Corrosive liquid selects H2O：HCl： CuSO4=50ml：50ml：10g, etching time 10-15s.
3) Thermal Fatigue Damage W-Cu/ is not carried out to prepared by embodiment 1 by scanning electron microscope and electron spectrometer respectively
W-Cu/BNi-2/18-8 drill rods plumb joint, reality after 100 cycles prepared by BNi-2/18-8 drill rods plumb joint, embodiment 2
Apply the W- after 200 cycles that after recycling prepared by W-Cu/BNi-2/18-8 drill rods plumb joint, embodiment 4 prepared by example 3 150 times
The microstructure of Cu/BNi-2/18-8 drill rod plumb joints carries out observation analysis respectively, discloses microcosmic group of soldered fitting after heat fatigue
The variation characteristic of fatigue damage is given birth in hair-weaving.The thermal fatigue test parameter is 400 DEG C of ceiling temperature, soaking time 20min；Lower limit temperature
Degree 20 DEG C, soaking time 2min, under this parameter distinguish cycle-index be 0 time (embodiment 1), 100 times (embodiments 2), 150 times
(embodiment 3), 200 times (embodiments 4).
Fig. 3 is not carry out Thermal Fatigue Damage W-Cu/BNi-2/18-8 drill rod plumb joint microstructures, and brazed seam area is mainly by leaning on
Diffusion layer, the batt layer close to W-Cu composite materials side and the brazed seam center three parts composition of nearly 18-8 steel side.Brazed seam circle
The defects of face pore-free, crackle, BNi-2 solders show good wetability and joint filling to W-Cu composite materials and 18-8 steel
Property.Fig. 4 is W-Cu/BNi-2/18-8 drill rod plumb joint microscopic structures after 100 cycles of experience, before the thermal fatigue test that compares
Microscopic structure, undergo 100 times cycle after brazed seam area be still mainly made of diffusion layer, batt layer and brazed seam center three parts,
The difference is that it is about 20 μm length occur in brazed seam center after 100 cycles, it is parallel to the crackle in brazed seam direction.Figure
5 be W-Cu/BNi-2/18-8 drill rod plumb joint microscopic structures after 150 cycles of experience, micro- after compared to 100 times cycles
Tissue, from, it can be found that after 150 cycles, the fatigue crack in brazed seam area is more obvious, can be seen in brazed seam center in Fig. 5
Observe the crackle of two cross-distributions, a lead crack and a crackle.Simultaneously it can be found that in the nearly brazed seam of base material 18-8 steel
Also there is a plurality of apparent fatigue crack in side, and a lead crack adds a plurality of crackle, formed between lead crack and crackle
A kind of dendroid distributional pattern.Fig. 6 is W-Cu/BNi-2/18-8 drill rod plumb joint microscopic structures after 200 cycles of experience, from
It can intuitively find in Fig. 6, be recycled compared to 150 times, the fatigue crack length in 200 cycle rear joint brazed seam areas is very
Greatly, a complete crackle is in brazed seam area genesis analysis.Simultaneously it can be found that also being observed on base material 18-8 steel a plurality of apparent
Fatigue crack, crackle cross-distribution, formed crackle grid.Analysis shows with the increase of heat fatigue cycle-index, W-Cu/
The variation characteristic of BNi-2/18-8 drill rod plumb joint microscopic structure Thermal Fatigue Damages is as shown in Figure 7.During thermal fatigue test,
BNi2 soldered fittings fatigue damage, cracked germinating and extension can occur in brazed seam area first, then gradually close in 18-8 steel
Brazed seam side starts fatigue damage occur, and fatigue crack is connected with each other after the region is germinated, and forms crackle grid.Wherein brazed seam area
Fatigue crack initiation in the crack initiation on silicide and boride, 18-8 steel in austenite grain boundary, the extensions path of crackle
To be extended along crystalline substance.
4) before using electronic universal tester and room temperature four-point bending fixture respectively to the thermal fatigue test of Examples 1 to 4
Rear W-Cu/BNi-2/18-8 drill rod plumb joints carry out four-point bending test, by room temperature four-point bending intensity to heat fatigue after
The residual mechanical properties of connector are evaluated.Soldered fitting bend specimen size is 40mm × 6mm × 5mm after thermal fatigue test,
Pressure head loading speed is 0.5mm/min during experiment.It undergoes the soldered fitting after same loop number and prepares 3 bend specimens
It is tested, 3 load values is averaged as final load value after the test, finally find out each follow using formula
The four-point bending intensity of soldered fitting after ring number.Room temperature four-point bending test schematic diagram is as shown in Figure 8.
Room temperature four-point bending strength calculation formula：
Related physical quantity in formula, σRoom temperature：Room temperature four-point bending intensity (MPa)；F：Room temperature flexural load (N)；l：Arm of force span
(mm)；b：The width (mm) of sample；h：The thickness (mm) of sample.
Embodiment 1, which is obtained, according to the test and computational methods does not carry out the weldering of Thermal Fatigue Damage W-Cu/BNi-2/18-8 drill rods
The four-point bending intensity that connector measures at ambient temperature is 333MPa.W-Cu/ after 100 cycles prepared by embodiment 2
Four-point bending intensity is 316MPa to BNi-2/18-8 drill rods plumb joint under room temperature, and 5% is had dropped compared to embodiment 1.It is real
Applying the four-point bending intensity that W-Cu/BNi-2/18-8 drill rod plumb joints measure under room temperature after recycling prepared by example 3 150 times is
250MPa has dropped 25%, the W-Cu/BNi-2/18-8 drill rods after 200 cycles prepared by embodiment 4 compared to embodiment 1
Plumb joint room temperature four-point bending intensity is 160MPa, and 52% is had dropped compared to embodiment 1.
1-4 based on the above embodiments can intuitively explain the exacerbation of The Degree of Thermal Fatigue Damage from microcosmic angle, and auxiliary
With the evidence of room temperature four-point bending intensity so that the present invention has more accuracy and convincingness for the measurement of Thermal Fatigue Damage.
The above is only a preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of soldered fitting BNi-2 solders, which is characterized in that the soldered fitting BNi-2 solders wrap by weight percentage
Include following element：Cr6-8%, Si4-5%, B2.75-3.5%, Fe2.5-3.5%, surplus Ni.
2. soldered fitting BNi-2 solders according to claim 1, which is characterized in that the soldered fitting BNi-2 solders with
Weight percent meter includes following element：Cr6%, Si5%, B3.5%, Fe3.5%, surplus Ni.
3. a kind of W-Cu/BNi-2/18-8 drill rod plumb joints containing soldered fitting BNi-2 solders as claimed in claim 1 or 2.
4. the preparation method of the W-Cu/BNi-2/18-8 drill rod plumb joints described in claim 3, which is characterized in that including following
Step：Base material W-Cu composite materials are placed in top, base material 18-8 steel is placed below, and BNi-2 solders are placed between two base materials, are connect
Capitiform formula is put into after clamping in the brazing jig specially made using docking, and fixture pressure head applies W-Cu composite materials
Certain pressure, vacuum brazing experiment are more than 5 × 10 in vacuum degree-3It carries out, 1010 DEG C -1180 DEG C of brazing temperature, protects under Pa environment
Warm 20 ~ 40min of time.
5. application of the W-Cu/BNi-2/18-8 drill rods plumb joint in terms of thermal fatigue property design technology described in claim 3.
6. the process that a kind of soldered fitting Thermal Fatigue Damage measures, which is characterized in that include the following steps：
1）Brazed coupon is cut into several 40mm × 6mm × 5mm small samples using linear cutting equipment, and 18-8 steel upper end away from
From the circular hole for boring an a diameter of 5mm at brazed seam 15mm, that is, heat fatigue sample is made；
2）The heat fatigue sample prepared is hung on special test fixture, heat fatigue sample and fixture are then fixed on heat
Start thermal fatigue test on fatigue tester；
3）Heat fatigue sample is prepared as metallographic specimen and carries out heat fatigue test：Abrasive paper for metallograph, diamond lap are used first
Cream, polishing cloth are ground and polish to heat fatigue sample, and then sample is cleaned and dried up with absolute alcohol or acetone,
Finally the brazed seam of sample and neighbouring base material are corroded using prepared corrosive liquid, etching time 10-15s；Pass through
Scanning electron microscope and electron spectrometer carry out observation analysis to the microstructure of different cycle-index rear joints, disclose pricker after heat fatigue
The variation characteristic of fatigue damage occurs for plumb joint microstructure；
4）The residual mechanical properties of soldered fitting are evaluated using room temperature four-point bending intensity after heat fatigue test, pass through scanning
Electronic Speculum and electron spectrometer carry out observation analysis to the bending fracture apperance of different cycle-index rear joints, establish pricker after heat fatigue
The flexural fracture characteristic of plumb joint.
7. the process that soldered fitting Thermal Fatigue Damage according to claim 6 measures, which is characterized in that the step
1）Brazed coupon be W-Cu/BNi-2/18-8 drill rod plumb joints.
8. the process that soldered fitting Thermal Fatigue Damage according to claim 6 measures, which is characterized in that the step
2）Corrosive liquid selects H2O：HCl：CuSO4=50ml：50ml：10g.
9. the process that soldered fitting Thermal Fatigue Damage according to claim 6 measures, which is characterized in that the step
2）Or step 3）Cycle-index 0 ~ 200 time, ceiling temperature is 400 DEG C, and lower limit temperature is 20 DEG C.
10. the process that soldered fitting Thermal Fatigue Damage according to claim 6 measures, which is characterized in that the step
Rapid 3）Bending strength carries out needing to carry out 0.2-0.4mm rounded corners to each side of bend specimen before evaluation starts, and is put at 4 points after chamfering
It in bending fixture, is tested by electronic universal tester load, wherein pressure head loading speed is 0.5mm/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810370403.3A CN108581268A (en) | 2018-06-12 | 2018-06-12 | The process that a kind of soldered fitting and its preparation process and Thermal Fatigue Damage measure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810370403.3A CN108581268A (en) | 2018-06-12 | 2018-06-12 | The process that a kind of soldered fitting and its preparation process and Thermal Fatigue Damage measure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108581268A true CN108581268A (en) | 2018-09-28 |
Family
ID=63614239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810370403.3A Pending CN108581268A (en) | 2018-06-12 | 2018-06-12 | The process that a kind of soldered fitting and its preparation process and Thermal Fatigue Damage measure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108581268A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109570510A (en) * | 2018-12-12 | 2019-04-05 | 江苏阳明船舶装备制造技术有限公司 | With W powder, Cu powder, BNi2 powder preparation 1Cr18Ni9 stainless steel watch finishing coat and preparation method |
| CN109632852A (en) * | 2018-12-14 | 2019-04-16 | 河钢股份有限公司 | A kind of electron microscopic sample preparation method showing bainite structure at fracture surface |
| CN113441863A (en) * | 2020-03-24 | 2021-09-28 | 广西汽车集团有限公司 | Method for judging fatigue strength of welding seam of welding part |
| CN113588378A (en) * | 2021-08-26 | 2021-11-02 | 华东理工大学 | Preparation and calculation method of brazed joint fracture toughness sample |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554509A (en) * | 2012-02-24 | 2012-07-11 | 山东大学 | Vacuum brazing solder and process of Mo-Cu alloy and stainless steel |
| CN103702793A (en) * | 2011-07-12 | 2014-04-02 | 西门子公司 | Nickel-based alloy, use, and method |
| CN103862147A (en) * | 2014-03-31 | 2014-06-18 | 山东大学 | Filler wire argon tungsten-arc welding process for molybdenum-copper alloy and nickel-base superalloy |
| CN104858570A (en) * | 2015-03-20 | 2015-08-26 | 江苏科技大学 | High-temperature Zr-based brazing filler metal for brazing of W-Cu alloy and stainless steel, as well as preparation method and welding method |
| CN105018931A (en) * | 2015-07-24 | 2015-11-04 | 金川集团股份有限公司 | GH3030 high-temperature alloy as-cast metallographic etchant and preparing method and using method thereof |
| CN106119610A (en) * | 2016-08-04 | 2016-11-16 | 中国科学院金属研究所 | A kind of quality evaluating method of sheet porous structural single crystal super alloy part |
| CN106475705A (en) * | 2015-08-27 | 2017-03-08 | 株式会社神户制钢所 | Ni based alloy welding metal |
-
2018
- 2018-06-12 CN CN201810370403.3A patent/CN108581268A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103702793A (en) * | 2011-07-12 | 2014-04-02 | 西门子公司 | Nickel-based alloy, use, and method |
| CN102554509A (en) * | 2012-02-24 | 2012-07-11 | 山东大学 | Vacuum brazing solder and process of Mo-Cu alloy and stainless steel |
| CN103862147A (en) * | 2014-03-31 | 2014-06-18 | 山东大学 | Filler wire argon tungsten-arc welding process for molybdenum-copper alloy and nickel-base superalloy |
| CN104858570A (en) * | 2015-03-20 | 2015-08-26 | 江苏科技大学 | High-temperature Zr-based brazing filler metal for brazing of W-Cu alloy and stainless steel, as well as preparation method and welding method |
| CN105018931A (en) * | 2015-07-24 | 2015-11-04 | 金川集团股份有限公司 | GH3030 high-temperature alloy as-cast metallographic etchant and preparing method and using method thereof |
| CN106475705A (en) * | 2015-08-27 | 2017-03-08 | 株式会社神户制钢所 | Ni based alloy welding metal |
| CN106119610A (en) * | 2016-08-04 | 2016-11-16 | 中国科学院金属研究所 | A kind of quality evaluating method of sheet porous structural single crystal super alloy part |
Non-Patent Citations (2)
| Title |
|---|
| CHUNZHI XIA ETC.: "Thermal fatigue damage and residual mechanical properties of W-Cu/Ag-Cu/1Cr18Ni9 brazed joint", 《JOURNAL OF ALLOYS AND COMPOUNDS》 * |
| 梁秋会等: "不同钎料真空钎焊W- Cu / 18 - 8 钢接头组织与性能分析", 《焊接技术》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109570510A (en) * | 2018-12-12 | 2019-04-05 | 江苏阳明船舶装备制造技术有限公司 | With W powder, Cu powder, BNi2 powder preparation 1Cr18Ni9 stainless steel watch finishing coat and preparation method |
| CN109632852A (en) * | 2018-12-14 | 2019-04-16 | 河钢股份有限公司 | A kind of electron microscopic sample preparation method showing bainite structure at fracture surface |
| CN113441863A (en) * | 2020-03-24 | 2021-09-28 | 广西汽车集团有限公司 | Method for judging fatigue strength of welding seam of welding part |
| CN113441863B (en) * | 2020-03-24 | 2022-04-05 | 广西汽车集团有限公司 | Method for judging fatigue strength of welding seam of welding part |
| CN113588378A (en) * | 2021-08-26 | 2021-11-02 | 华东理工大学 | Preparation and calculation method of brazed joint fracture toughness sample |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108581268A (en) | The process that a kind of soldered fitting and its preparation process and Thermal Fatigue Damage measure | |
| Feng et al. | Microstructure and properties of Cu/Al joints brazed with Zn–Al filler metals | |
| Long et al. | Unveiling the damage evolution of SAC305 during fatigue by entropy generation | |
| Chang et al. | Evaluation of microstructure and mechanical properties of dissimilar welding of copper alloy and stainless steel | |
| Zhang et al. | Effect of brazing temperature on microstructure and mechanical properties of 2D Cf/SiC and Nb joints brazed with Co–Ti–Nb filler alloy | |
| Luo et al. | Overview of R&D on plasma-facing materials and components in China | |
| CN106392367A (en) | Solder for brazing red copper and graphite and brazing method | |
| CN106769527B (en) | A kind of soldered fitting brazed seam mechanics parameter test method | |
| CN108188521A (en) | A kind of high-frequency induction heating method for welding of Mo Re alloys foil | |
| Dai et al. | Microstructure and properties of 6061 aluminum alloy brazing joint with Al–Si–Zn filler metal | |
| CN110524082B (en) | Method for quickly wetting carbon fibers in ceramic matrix composite by taking Fe as active element | |
| CN104772578B (en) | A kind of solder for including titanium zirconium cupro-nickel | |
| Heo et al. | Microstructure and mechanical properties of Ni foam/stainless steel joint brazed using Ni-based alloy | |
| Goswami et al. | Review of Microstructural and Mechanical Properties of Microwave Welding of Lightweight Alloys | |
| Li et al. | Mechanical behavior of ceramic-metal joint under quasi-static and dynamic four point bending: Microstructures, damage and mechanisms | |
| Hebda et al. | Vacuum brazing of stainless steel depending on the surface preparation methodand temperature of the process | |
| CN101992331A (en) | Vacuum brazing process for super-Ni laminated material and Cr18-Ni8 stainless steel | |
| CN113020735B (en) | Preparation method of silicon nitride ceramic/stainless steel braze welding joint with corrosion resistance and stress relief | |
| CN105965176A (en) | Ni-based rapidly-cooled brazing material and brazing process for brazing tungsten-copper alloy and stainless steel | |
| Benabou et al. | Microstructural effects of isothermal aging on a doped SAC solder alloy | |
| Zhong et al. | Study on vacuum brazing of glass to Kovar® alloy with Cu-Ni-Sn-P | |
| Ding et al. | A comprehensive study of parallel gap resistance welding joint between Ag foil and front electrode of GaAs solar cell | |
| Kumar et al. | Study on requirement of nickel electroplating in OFE copper-316L stainless steel brazed joints | |
| CN108907492B (en) | Molybdenum/steel joint and preparation method thereof | |
| CN115070258A (en) | Zirconium-based amorphous alloy brazing filler metal and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180928 |