CN105033501B - Microalloying 35Cr45NiNb welding wire for ethylene cracking furnace pipe - Google Patents
Microalloying 35Cr45NiNb welding wire for ethylene cracking furnace pipe Download PDFInfo
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- CN105033501B CN105033501B CN201510482393.9A CN201510482393A CN105033501B CN 105033501 B CN105033501 B CN 105033501B CN 201510482393 A CN201510482393 A CN 201510482393A CN 105033501 B CN105033501 B CN 105033501B
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- 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
- B23K35/3053—Fe as the principal constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/04—Alloys containing less than 50% by weight of each constituent containing tin or lead
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
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Abstract
The invention discloses a microalloyed 35Cr45NiNb welding wire for an ethylene cracking furnace tube, which comprises the following components in percentage by mass: 0.40 to 0.50, Si: 1.20 to 1.50, Mn: 0.80-1.20, P: 0.005 to 0.020, S: 0.002-0.010 wt%, Cr: 34-36, Ni: 44-46, Nb: 0.80 to 1.50, W: 0.30 to 0.80, Mo: 0.10 to 0.30, Cu: 0.025 to 0.080, Al: 0.05 to 0.20, Ti: 0.05 to 0.15, Co: 0.005-0.05, 0.0010-0.0050B, 0-0.0020 Pb, 0-0.0001 Bi, and the balance Fe. The high-temperature endurance of the welding joint of the ethylene cracking furnace tube can be effectively improved, so that the requirement that the high-temperature endurance fracture time is more than 100 hours under the test conditions of 1100 ℃ and 17MPa is met, and the aim of ensuring the long-period safe operation of an ethylene cracking furnace device is fulfilled.
Description
Technical field
The invention belongs to ethylene cracking tube technical field of welding materials, and in particular to a kind of effective micro- conjunction of ethane cracking furnace
Aurification 35Cr45NiNb welding wires.
Background technology
Ethene is one of most important basic material in petrochemical industry field, with the continuous expansion of ethylene unit scale,
The maximization of key equipment pyrolysis furnace turns into the inexorable trend of Ethylene Development in ethylene unit.Ethylene cracking tube is stone
Change the nucleus equipment of ethylene unit, once occurring failure even explosion accident, the long period safety of package unit will be had a strong impact on
Operation.One of the reason for quality problems of welding point become ethylene cracking tube initial failure.Found according to investigation, in second
Alkene device go into operation after 3~4 years, or even started in 1~2 year welding point failure phenomenon occur, 4~6 especially after operation
The problem of weld cracking occur is concentrated in year.
The influence of the selection Welded Joints of wlding is mainly manifested in the high-temperature behavior of influence welding point, worst hot case pair
Ethylene cracking tube welding point has many influences, predominantly high-temerature creep.Weld metal croop property and mother metal are not
Matching, can occur the redistribution of stress, a part of stress that weaker mother metal is born is discharged into weld seam in creep process
In, cause stress concentration so that the lesion development of weld seam is faster and as weak link.
Although, HG/T2601-2011《High-temperature bearing centrifugal casting alloy furnace tubes by adopting》Middle regulation welding joint mechanical property
Meet the requirement of mother metal, i.e., high-temperature and durable rupture time is more than 100 hours under the conditions of 1100 DEG C, 17MPa.However, according to tune
Grind and coherent detection, the high-temperature and durable rupture time of welding of tubes joint is unsatisfactory for standard requirement, and far below mother metal, causes
Crackle easily germinates and extended in weld seam position, ultimately results in boiler tube failure.
The content of the invention
The present invention connects there is provided a kind of effectively lifting ethylene cracking tube in order to overcome the above-mentioned deficiencies of the prior art
The high temperature endurance performance of head and then the effective microalloying of ethane cracking furnace for ensureing cracking of ethylene furnace apparatus long period safe operation
35Cr45NiNb welding wires.
To achieve the above object, present invention employs following technical scheme：
A kind of effective microalloying 35Cr45NiNb welding wires of ethane cracking furnace, in units of mass percent, contain C：
0.40~0.50, Si：1.20~1.50, Mn：0.80~1.20, P：0.005~0.020, S：0.002~0.010, Cr：34~
36, Ni：44~46, Nb：0.80~1.50, W：0.30~0.80, Mo：0.10~0.30, Cu：0.025~0.080, Al：0.05
~0.20, Ti：0.05~0.15, Co：0.005~0.05, B:0.0010~0.0050, Pb:0~0.0020, Bi:0~
0.0001, surplus is Fe.
It is preferred that, in units of mass percent, contain C：0.434, Si：1.24, Mn：1.02, P：0.019, S：
0.0090, Cr：34.24, Ni：44.00, Nb：0.93, W：0.30, Mo：0.109, Cu：0.056, Al：0.195, Ti：0.099,
Co：0.014, B：0.0026, Pb：0.0010, Bi：0.000005, surplus is Fe.
It is preferred that, in units of mass percent, contain C：0.417, Si：1.26, Mn：0.96, P：0.02, S：
0.0091, Cr：35.74, Ni：45.04, Nb：0.92, W：0.347, Mo：0.100, Cu：0.050, Al：0.084, Ti：0.132,
Co：0.0085, B：0.0026, Pb：0.0010, Bi：0.000004, surplus is Fe.
Influence of the above-mentioned each element to the effective microalloying 35Cr45NiNb welding wires high temperature resistant enduring quality of ethane cracking furnace
It is as follows：
1.C (0.40~0.50 mass %)
C and Cr, Mo, Ti, V, Nb etc. form primary carbide M7C3With NbC etc., improve material at high temperature intensity.In high temperature
During effect, the super saturated solid solution carbon in matrix is with the M of small and dispersed23C6Separate out, low-alloyed toughness can be dropped, deteriorate welding
Property, therefore, the phosphorus content in the welding wire is 0.40~0.50 mass %.
2.Si (1.20~1.50 mass %)
Si is necessary deoxidier when smelting, and can improve mobility of the molten steel in casting.Si, which is dissolved in austenite, to be carried
Gao Gang hardness and intensity, meanwhile, in high temperature oxidative atmosphere, Si and O combines to form SiO2Film, the high temperature for improving boiler tube resists
Oxidation susceptibility.Si is easy to produce segregation in the higher environment of Ni contents, and Low melting point eutectic is formed on crystal boundary, is easily caused
Welding hot crack tendency, deteriorates the welding performance of steel.Si is to promote σ phases to separate out element to exist, and addition will excessively reduce persistently strong
Degree.Therefore, the si content in the welding wire is 1.20~1.50 mass %.
3.Mn (0.80~1.20 mass %)
Mn is to expand austenite phase p-block element p, and the MnS of nodularization is generated with S, S harm can be eliminated, can also improve weldability
Energy.But Mn elements promote σ phases to separate out, and low-alloyed antioxygenic property can excessively drop in addition.Therefore, the amount containing Mn in the welding wire
For 0.80~1.20 mass %.
4.P (0.005~0.020 mass %)
P element is had a significant impact to creep rupture strength, with the increase of P element content, and creep rupture strength is reduced, due to
P element can produce segregation in heat treatment process, promote the forming core in cavity.Therefore, the P content in the welding wire be 0.005~
0.020 mass %.
5.S (0.002~0.010 mass %)
S constituent contents have a significant impact to high-temperature duration life, with the increase of S elements, creep rupture strength reduction.This
It is due to that sulphur segregation is empty because the adhesion of sulfide and matrix is poor to crystal boundary formation sulfide in heat treatment process
Forming core is easy to, at high operating temperatures because stress raisers cause cavity connection so as to produce micro-crack, causes boiler tube fast
Speed failure.Therefore, the amount containing S in the welding wire is 0.002~0.010 mass %.
6.Cr (34~36 mass %)
Cr elements are main solution strengthening elements and carbide former in alloy.Cr elements are formed in material surface
Fine and close Cr2O3Diaphragm, can play a decisive role to the anti-oxidant of alloy, intensity, anti-carburizing.But Cr too high levels can be led
σ phases are caused to separate out, so as to drop low-alloyed intensity and toughness.Therefore, the amount containing Cr in the welding wire is 34~36 mass %.
7.Ni (44~46 mass %)
Ni elements are to be formed and stable austenite, improve the essential element of impervious carbon, anti-oxidant, elevated temperature strength and toughness,
The intensity of steel can be improved without significantly reducing its toughness, improve the processability and solderability of steel.Ni atoms will reduce C atoms and exist
Solubility in alloy, excessive add can cause the carbide of excess to separate out.Therefore, the ni content in the welding wire is 44~46
Quality %.
8.Nb (0.80~1.50 mass %)
The NbC that Nb elements formation crystal boundary is separated out, effectively improves the intensity of material, while making crystal boundary chromium carbide even dispersion point
Cloth, postpones Carbide Coarsening process, so as to improve the elevated temperature strength of alloy.Therefore, the amount containing Nb in the welding wire be 0.80~
1.50 quality %.
9.W (0.30~0.80 mass %)
W elements are solution strengthening elements, can improve the elevated temperature strength of alloy, suppress Carbon diffusion speed, but added
Amount can then influence the antioxygenic property of alloy, and promote σ phases to separate out, and drop low-alloyed intensity and toughness.Therefore, in the welding wire
Amount containing W is 0.30~0.80 mass %.
10.Mo (0.10~0.30 mass %)
Mo elements are solution strengthening elements, can improve the elevated temperature strength of alloy, suppress Carbon diffusion speed, but added
Amount can then influence the antioxygenic property of alloy, and promote σ phases to separate out, and drop low-alloyed intensity and toughness.Therefore, in the welding wire
Amount containing Mo is 0.10~0.30 mass %.
11.Cu (0.025~0.080 mass %)
Cu elements are the elements for expanding austenite phase field, improve the strength of materials and yield tensile ratio, but Cu constituent contents are too high
Copper brittleness is also easy to produce in hot procedure, causes cracking.Therefore, the amount containing Cu in the welding wire is 0.025~0.080 mass %.
12.Al (0.05~0.20 mass %)
Al elements are used for deoxidation in casting process, while heat resistance can be improved with Ni formation compounds.But Al elements
Too high levels can promote σ phases during long-term creep to be formed and be roughened, and reduce creep life.Therefore, the amount containing Al in the welding wire is
0.05~0.20 mass %.
13.Ti (0.05~0.15 mass %)
When Ti constituent contents are more than 0.10 mass %, the strength of materials can be improved in crystal boundary formation titanium carbide.Therefore, the weldering
Amount containing Ti in silk is 0.05~0.15 mass %.
14.Co (0.005~0.05 mass %)
Co elements can improve the antioxygenic property of material, while significantly improving the heat resistance and high temperature hardness of material.Therefore,
Amount containing Co in the welding wire is 0.005~0.05 mass %.
15.B (0.0010~0.0050 mass %)
B element has crystal grain thinning, improves grain morphology, and purification impurity etc. is acted on.Simultaneously can improve steel quenching degree and
Elevated temperature strength.B addition can not only play suppression S elements to the Free Surface segregation such as room formation sulfide, but also can
To change the species and form of cemented zone carbide.Therefore, the amount containing B in the welding wire is 0.0010~0.0050 mass %.
16.Pb (0~0.0020 mass %)
Pb elements are in the case of drawing by high temperature stress, to Grain Boundary Segregation, reduce surface energy, promote sprouting for Creep hole
It is raw, ultimately result in the reduction of high temperature endurance performance.Therefore, consider the requirement of high-temperature and durable rupture time and financial cost because
Amount containing Pb in element, the welding wire is 0~0.0020 mass %.
17.Bi (0~0.0001 mass %)
Bi elements are similar with Pb elements, and Bi elements reduce boundary surfaces energy to Grain Boundary Segregation, increase cavity nucleation rate.Cause
This, the amount containing Bi in the welding wire is 0~0.0001 mass %.
The beneficial effects of the present invention are：
The present invention proposes a kind of effective microalloying 35Cr45NiNb welding wires of ethane cracking furnace, by various beneficial members
Element carries out the mixing ratio of certain mass, in units of mass percent, contains C：0.40~0.50, Si：1.20~1.50, Mn：
0.80~1.20, P：0.005~0.020, S：0.002~0.010, Cr：34~36, Ni：44~46, Nb：0.80~1.50, W：
0.30~0.80, Mo：0.10~0.30, Cu：0.025~0.080, Al：0.05~0.20, Ti：0.05~0.15, Co：0.005
~0.05, B:0.0010~0.0050, Pb:0~0.0020, Bi:0~0.0001, surplus is Fe, can effectively improve welding of tubes
The high-temperature and durable rupture time of joint, makes it meet the high-temperature and durable rupture time under 1100 DEG C, 17MPa experimental conditions and is more than
The requirement of 100 hours, meets commercial Application demand, with preferable application value.
Embodiment
Below in conjunction with embodiments of the invention, the technical scheme in the embodiment of the present invention is clearly and completely retouched
State, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on the present invention
In embodiment, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to the scope of protection of the invention.
It should be noted that the welding wire in the present invention uses customary preparation methods.
Embodiment 1
A kind of effective microalloying 35Cr45NiNb welding wire chemical compositions of ethane cracking furnace are shown in Table 1.
The effective microalloying 35Cr45NiNb welding wire chemical compositions of the ethane cracking furnace of table 1
| Numbering | C | Si | Mn | P | S | Cr | Ni | Nb | W |
| 1# | 0.434 | 1.24 | 1.02 | 0.019 | 0.0090 | 34.24 | 44.00 | 0.93 | 0.300 |
| Numbering | Mo | Cu | Al | Ti | Co | B | Pb | Bi | / |
| 1# | 0.109 | 0.056 | 0.195 | 0.099 | 0.014 | 0.0026 | 0.0010 | 0.000005 | / |
Note：In units of mass percent.
To carrying out 2 respectively with the effective microalloying 35Cr45NiNb welding wires sample of the ethane cracking furnace that making is matched in table 1
Secondary 1100 DEG C, the high temperature resistant creep rupture test under 17MPa experimental conditions, gained test result are as shown in table 2.
The effective microalloying 35Cr45NiNb welding wires stress-rupture tester result of the ethane cracking furnace of table 2
From stress-rupture tester result, the welding wire creep rupture strength for meeting this patent composition range meets high temperature and held
Long rupture time is more than 100h.
Embodiment 2
A kind of effective microalloying 35Cr45NiNb welding wire chemical compositions of ethane cracking furnace are shown in Table 3.
The effective microalloying 35Cr45NiNb welding wire chemical compositions of the ethane cracking furnace of table 3
| Numbering | C | Si | Mn | P | S | Cr | Ni | Nb | W |
| 2# | 0.417 | 1.26 | 0.96 | 0.02 | 0.0091 | 35.74 | 45.04 | 0.92 | 0.347 |
| Numbering | Mo | Cu | Al | Ti | Co | B | Pb | Bi | / |
| 2# | 0.100 | 0.050 | 0.084 | 0.132 | 0.0085 | 0.0026 | 0.0010 | 0.000004 | / |
Note：In units of mass percent.
To carrying out 2 respectively with the effective microalloying 35Cr45NiNb welding wires sample of the ethane cracking furnace that making is matched in table 3
Secondary 1100 DEG C, the high temperature resistant creep rupture test under 17MPa experimental conditions, gained test result are as shown in table 4.
The effective microalloying 35Cr45NiNb welding wires stress-rupture tester result of the ethane cracking furnace of table 4
From stress-rupture tester result, the welding wire creep rupture strength for meeting this patent composition range meets high temperature and held
Long rupture time is more than 100h.
Embodiment 3
A kind of effective microalloying 35Cr45NiNb welding wire chemical compositions of ethane cracking furnace are shown in Table 5.
The effective microalloying 35Cr45NiNb welding wire chemical compositions of the ethane cracking furnace of table 5
| Numbering | C | Si | Mn | P | S | Cr | Ni | Nb | W |
| 3# | 0.520 | 1.48 | 1.01 | 0.0130 | 0.0058 | 34.97 | 45.19 | 0.94 | 0.214 |
| Numbering | Mo | Cu | Al | Ti | Co | B | Pb | Bi | / |
| 3# | 0.102 | 0.035 | 0.129 | 0.085 | 0.031 | 0.0022 | 0.0014 | 0.000023 | / |
Note：In units of mass percent.
To carrying out 1100 with the effective microalloying 35Cr45NiNb welding wires sample of the ethane cracking furnace that making is matched in table 5
DEG C, the high temperature resistant creep rupture test under 17MPa experimental conditions, gained test result is as shown in table 6.
The effective microalloying 35Cr45NiNb welding wires stress-rupture tester result of the ethane cracking furnace of table 6
C and W elemental compositions do not provide the composition range of welding wire in the present invention in chemical composition result, the welding wire
Interior, result of the test measures its high-temperature and durable rupture time less than 100h, and much smaller than the height of welding wire in embodiment 1 and embodiment 2
The warm stress rupture time.
To sum up described in embodiment, the effective microalloying 35Cr45NiNb welding wires proportioning of ethane cracking furnace provided by the present invention
The requirement that the high-temperature and durable rupture time under 1100 DEG C, 17MPa experimental conditions is more than 100 hours is met, with larger application
Value.
Claims (1)
1. a kind of effective microalloying 35Cr45NiNb welding wires of ethane cracking furnace, it is characterised in that：In units of mass percent,
Contain C：0.417, Si：1.26, Mn：0.96, P：0.02, S：0.0091, Cr：35.74, Ni：45.04, Nb：0.92, W：
0.347, Mo：0.100, Cu：0.050, Al：0.084, Ti：0.132, Co：0.0085, B：0.0026, Pb：0.0010, Bi：
0.000004, surplus is Fe.
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| CN107138873A (en) * | 2017-04-14 | 2017-09-08 | 江苏羽立新材料科技有限公司 | A kind of low-phosphorous sulphur high-strength high temperature-resistant Cr35Ni45Nichrome welding wire and its preparation technology |
| CN111299906B (en) * | 2020-03-26 | 2021-08-24 | 江苏博航合金科技有限公司 | NiCrNb-Zr welding wire for cracking furnace and preparation method thereof |
| CN115488541B (en) * | 2022-10-17 | 2023-12-19 | 苏州威奥得焊材科技有限公司 | Titanium carbide-based wear-resistant flux-cored wire |
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| EP1431410B1 (en) * | 1999-09-03 | 2006-07-12 | Kiyohito Ishida | Free cutting alloy |
| JP3952861B2 (en) * | 2001-06-19 | 2007-08-01 | 住友金属工業株式会社 | Metal material with metal dusting resistance |
| JP4506958B2 (en) * | 2004-08-02 | 2010-07-21 | 住友金属工業株式会社 | Welded joint and its welding material |
| CN101649424A (en) * | 2009-08-18 | 2010-02-17 | 泰州市永昌冶金设备有限公司 | Novel heat resistant steel |
| JP4835770B1 (en) * | 2010-06-07 | 2011-12-14 | 住友金属工業株式会社 | Welding material for austenitic heat resistant steel, weld metal and welded joint using the same |
| US9347121B2 (en) * | 2011-12-20 | 2016-05-24 | Ati Properties, Inc. | High strength, corrosion resistant austenitic alloys |
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Address after: 230031 No. 888 Changjiang West Road, Shushan District, Anhui, Hefei Patentee after: HEFEI GENERAL MACHINERY RESEARCH INSTITUTE Co.,Ltd. Patentee after: Hefei General Machinery Research Institute special equipment inspection station Co., Ltd Address before: 230031 No. 888 Changjiang West Road, Shushan District, Anhui, Hefei Patentee before: HEFEI GENERAL MACHINERY Research Institute Patentee before: Special equipment inspection station of Hefei General Machinery Research Institute |