CN106756343A - A kind of drilling rod high strength heat resistant alloy and preparation method thereof - Google Patents
A kind of drilling rod high strength heat resistant alloy and preparation method thereof Download PDFInfo
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- CN106756343A CN106756343A CN201710108989.1A CN201710108989A CN106756343A CN 106756343 A CN106756343 A CN 106756343A CN 201710108989 A CN201710108989 A CN 201710108989A CN 106756343 A CN106756343 A CN 106756343A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C21/00—Alloys based on aluminium
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
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- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C22C21/00—Alloys based on aluminium
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/14—Alloys based on aluminium with copper as the next major constituent with silicon
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/057—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
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Abstract
A kind of drilling rod high strength heat resistant alloy and preparation method thereof, the drilling rod high strength heat resistant alloy is made up of following component and mass percent：Cu 3.5~4.0%, Mg 0.8~1.2%, Fe 0.6~0.8%, Si 0.2~0.4%, Li 0.1~0.3%, Zr 0.01~0.02%, C 0.002~0.004%, Re 0.1~0.3%, Mn≤0.1%, Zn≤0.1%, balance of Al and inevitable impurity, impurity is single≤0.05%, total amount≤0.15%.Drilling rod high strength heat resistant alloy of the present invention has the advantages that intensity is high, heat-resist and low production cost, is suitable for the oil gas mineral resources exploration aluminium drill pipes such as manufacture deep-well, ultradeep well, with wide market application foreground.
Description
Technical field
The invention belongs to technical field of aluminum alloy technology, a kind of drilling rod high strength heat resistant alloy and its preparation side are specifically related to
Method.
Background technology
Drilling rod is the main tool of oil gas mineral resources exploration, carries the important task of transmission power and sediment mud, its
Weight accounts for more than the 80% of whole exploration equipment.With the development of China's oil gas mineral resources exploration cause, deep-well, ultradeep well
Quantity with horizontal well is on the increase, and exploration and development difficulty is increasing.Though existing steel drill rod has the advantages that intensity is high,
Its weight is also big, limits drilling depth, and transport is also difficult.Aluminium drill pipe has lightweight, specific strength high, corrosion-resistant and anti-
The advantages of fatigue behaviour is good, can mitigate the load of rig, improve drilling depth, drilling rate and drilling efficiency, also allow for boring
The long distance transportation of equipment is visited, is to solve the remote mountains deep-sea oil gas mineral products such as deep-well, ultradeep well, directional well, horizontal well, acid gas well
The important equipment of resource exploration problem.
The research origin of aluminium drill pipe is the sixties in last century, by the development of more than 50 years, aluminium drill pipe technology
Research and application have turned into a focus of oil gas mineral resources exploration in the world., Russian Exxon Neftegas in 2011
Company was only just completed up to 11475 meters of probings of horizontal well using aluminium drill pipe with 60 days.Current aluminium drill pipe is most
Big drilling depth is more than 12000 meters.The high intensity aluminium that China has introduced a collection of Russian Acker Wa Ji companies in 2009 is closed
Golden drilling rod and successfully going into the well is used.For aluminium drill pipe, due to the specific military service operating mode of deep-well, ultradeep well etc., it is desirable to
It must have intensity and heat endurance high.Current drilling rod aluminium alloy is generally 2000 line aluminium alloys, but for deep-well and is surpassed
For the probing of deep-well, existing 2000 line aluminium alloy still suffers from intensity and the not enough problem of heat endurance, in addition, existing 2000 are
Cu contents are universal higher in aluminium alloy, and with the addition of the expensive alloying element such as Ni, Ag, cause the production of aluminium drill pipe
Cost is also higher.
The content of the invention
Above-mentioned there is problem and shortage it is an object of the invention to be directed to, there is provided a kind of intensity is high, heat endurance is good, production
Drilling rod high strength heat resistant alloy of low cost and preparation method thereof.
The technical proposal of the invention is realized in this way：
Drilling rod high strength heat resistant alloy of the present invention, is characterized in being made up of following component and mass percent：Cu
3.5~4.0%, Mg 0.8~1.2%, Fe 0.6~0.8%, Si 0.2~0.4%, Li 0.1~0.3%, Zr 0.01~0.02%,
C 0.002~0.004%, Re 0.1~0.3%, Mn≤0.1%, Zn≤0.1%, balance of Al and inevitable impurity, impurity
It is single≤0.05%, total amount≤0.15%, wherein the Re into being grouped into and mass percent is：Pr 25.2%, Nd 20.6%,
Pm 21.3%, Sm 13.8%, Gd 19.1%.
Preferably, drilling rod high strength heat resistant alloy of the present invention, is made up of following component and mass percent：Cu
3.8%, Mg 1.1%, Fe 0.7%, Si 0.3%, Li 0.2%, Zr 0.015%, C 0.003%, Re 0.2%, Mn≤0.1%, Zn
≤ 0.1%, balance of Al and inevitable impurity, impurity is single≤0.05%, total amount≤0.15%, wherein the composition of the Re
Composition and mass percent are：Pr 25.2%, Nd 20.6%, Pm 21.3%, Sm 13.8%, Gd 19.1%.
The preparation method of drilling rod high strength heat resistant alloy of the present invention, is characterized in comprising the following steps：
The first step：From technical pure aluminium ingot, pure magnesium ingot, cathode copper, instant silicon, Al20Fe alloys, Al20Li alloys, Al5Zr1C
Alloy and mischmetal Re are used as raw material；
Second step：By aluminium ingot in 700~740 DEG C of heating fusings, and addition accounts for the electrolysis that raw material gross weight is 3.5~4.0%
Copper, 0.8~1.2% magnesium ingot, 0.2~0.4% instant silicon, 3~4% Al20Fe alloys and 0.5~1.5% Al20Li are closed
Gold, stirring is fused into aluminum alloy melt；
3rd step：After to aluminum alloy melt refining degasification slagging-off, the Al5Zr1C for accounting for that raw material gross weight is 0.2~0.4% is added
Alloy and 0.1~0.3% mischmetal Re, the composition that stirring enables aluminum alloy to liquid are uniform；
4th step：Aluminum alloy melt is cooled to 680~720 DEG C and 0.5~1 hour is stood, aluminium alloy is then cast as；
5th step：By aluminium alloy in 520~530 DEG C of solution treatment 1~3 hour, after water quenching, in 145~165 DEG C of Ageing Treatments 12
~18 hours, drilling rod high strength heat resistant alloy is obtained after furnace cooling.
The present invention compared with prior art, with advantages below：
The room temperature tensile intensity of drilling rod high strength heat resistant alloy of the present invention is more than 550MPa, and yield strength is more than 500MPa, stretches
Rate long is more than 9%, and room temperature tensile intensity of the heat exposure after 500 hours is more than 510MPa at 200 DEG C, and yield strength is more than
475MPa, elongation is more than 8%, has the advantages that intensity is high, heat endurance is good and low production cost, is suitable for manufacture deep-well, surpasses
The oil gas mineral resources exploration aluminium drill pipe such as deep-well, with wide market application foreground.
Specific embodiment
To make the purpose of the present invention, technical scheme and effect clearer, clear and definite, make further detailed to the present invention below
Describe in detail bright.
Drilling rod high strength heat resistant alloy of the present invention, is made up of following component and mass percent：Cu 3.5~
4.0%, Mg 0.8~1.2%, Fe 0.6~0.8%, Si 0.2~0.4%, Li 0.1~0.3%, Zr 0.01~0.02%, C
0.002~0.004%, Re 0.1~0.3%, Mn≤0.1%, Zn≤0.1%, balance of Al and inevitable impurity, impurity list
Individual≤0.05%, total amount≤0.15%.
Preferably, the drilling rod high strength heat resistant alloy into being grouped into and mass percent is：Cu 3.8%, Mg
1.1%, Fe 0.7%, Si 0.3%, Li 0.2%, Zr 0.015%, C 0.003%, Re 0.2%, Mn≤0.1%, Zn≤0.1% is remaining
It is Al and inevitable impurity to measure, impurity is single≤0.05%, total amount≤0.15%.
The Re into being grouped into and mass percent is：Pr 25.2%, Nd 20.6%, Pm 21.3%, Sm 13.8%, Gd
19.1%。
Wherein, Cu and Mg are the main alloy elements of drilling rod high strength heat resistant alloy of the present invention, and Cu and Mg are except having
Outside solution strengthening effect, the extremely obvious CuAl of ageing strengthening effect can be also formed2And Mg2Si phases and heat endurance are fabulous
Al2CuMg、Al2The surplus phase such as CuLi, strengthens the intensity and heat resistance of aluminium alloy.Cu, Mg content are higher, and the intensity of aluminium alloy is got over
Height, heat resistance is better, but Cu's expensive, the Cu contents production cost that can increase aluminium drill pipe too high, therefore, Cu contents
Selection is in the selection of 3.5~4.0%, Mg contents 0.8~1.2%, it is preferred that Cu contents are that 3.8%, Mg contents are 1.1%.
Fe can form the Al of better heat stability in drilling rod high strength heat resistant alloy3Fe、Al2FeSi、FeSiAl3、
Fe2SiAl8Deng superfluous phase, strengthen the heat resistance of aluminium alloy.Fe contents are higher, and the quantity of superfluous phase is also more, aluminium alloy it is resistance to
It is hot better.Fe's is cheap, and typically all contains more than 0.1% Fe in technical pure aluminium ingot.But Fe contents are too high also
Reduce plasticity, anti-stress corrosion performance and the fatigue behaviour of aluminium alloy.Therefore, the selection of Fe contents is 0.6~0.8%, it is preferred that
Fe contents are 0.7%.
Li is most light metallic element, and Li is added in drilling rod high strength heat resistant alloy, and aluminium alloy can be reduced first
Density, improve aluminium alloy specific strength and specific stiffness, reach light-weighted effect.Secondly, Li is in aluminium alloy ag(e)ing process meeting
Also separate out nano-scale and thermodynamically stable Al3Li、Al2MgLi、Al2The hardening constituents such as CuLi, pinning dislocation, subgrain and crystal boundary,
Suppress alloy recrystallization, improve the intensity and heat resistance of aluminium alloy.The Li of addition 0.1~0.3% can produce aobvious to aluminium alloy
The reinforcing effect of work, it is preferred that Li additions are 0.2%.
Zr, C be in being added to drilling rod high strength heat resistant alloy in the form of Al5Zr1C alloys, Al5Zr1C alloys be by
The mixture of potassium fluorozirconate and carbon dust is obtained with aluminium liquid reaction, and substantial amounts of ZrC particles are contained in inside.Al5Zr1C alloys are a kind of
New aluminum grain refiner, inventor experimental results demonstrate, the existing Al5Ti1B of Al5Zr1C alloy ratios and
Al5Ti1C alloys have stronger grain refining capability, and the Al5Zr1C alloys of addition 0.2~0.4% contain 0.01 in aluminium alloy
~0.02% Zr and 0.002~0.004% C, can notable refining aluminum alloy crystal grain, improve the structural homogenity of aluminium alloy,
Improve the plastic deformation ability of aluminium alloy, it is preferred that Al5Zr1C alloy addition levels are 0.5%, and 0.015% is contained in aluminium alloy
The C of Zr and 0.003%.
Re is to contain Pr, Nd, Pm, Sm, Gd totally 5 kinds of mischmetals of LREE, the physical chemistry of LREE
Property is active, can with the impurity element reaction generation high-melting-point such as the hydrogen in aluminum alloy melt, oxygen, manganese, zinc, chromium, high stability it is dilute
Earth compounds, have deep purifying to act on aluminum alloy melt, can eliminate adverse effect of the impurity element to mechanical property.In addition,
The characteristics of rare earth compound has fusing point high, hardness high and good heat endurance, segregation can improve phase boundary and crystalline substance in phase boundary and crystal boundary
The intensity and creep resisting ability on boundary, further improve the intensity and heat resistance of aluminium alloy.The lot of experiments of inventor shows,
Containing Pr, Nd, Pm, Sm, Gd, totally 5 kinds of effects of the mixed light rare earth of LREE are a kind of than addition or a few is light for addition
The effect of rare earth element is all more preferable, therefore, the mischmetal of selection addition 0.2~0.4%, it is preferred that mischmetal addition is
0.2%。
Present invention also offers the preparation method of the drilling rod high strength heat resistant alloy, specifically comprise the steps of：
The first step：From technical pure aluminium ingot, pure magnesium ingot, cathode copper, instant silicon, Al20Fe alloys, Al20Li alloys, Al5Zr1C
Alloy and mischmetal Re are used as raw material；
Second step：By aluminium ingot in 700~740 DEG C of heating fusings, and addition accounts for the electrolysis that raw material gross weight is 3.5~4.0%
Copper, 0.8~1.2% magnesium ingot, 0.2~0.4% instant silicon, 3~4% Al20Fe alloys and 0.5~1.5% Al20Li are closed
Gold, stirring is fused into aluminum alloy melt；
3rd step：After to aluminum alloy melt refining degasification slagging-off, the Al5Zr1C for accounting for that raw material gross weight is 0.2~0.4% is added
Alloy and 0.1~0.3% mischmetal Re, the composition that stirring enables aluminum alloy to liquid are uniform；
4th step：Aluminum alloy melt is cooled to 680~720 DEG C and 0.5~1 hour is stood, aluminium alloy is then cast as；
5th step：By aluminium alloy in 520~530 DEG C of solution treatment 1~3 hour, after water quenching, in 145~165 DEG C of Ageing Treatments 12
~18 hours, drilling rod high strength heat resistant alloy is obtained after furnace cooling.
Preparation method of the invention, from technical pure aluminium ingot, pure magnesium ingot, cathode copper, instant silicon, Al20Fe alloys,
Al20Li alloys, Al5Zr1C alloys and mischmetal Re, by optimizing the content of Cu, Mg main alloying element, add as raw material
Plus Al20Fe alloys, Al20Li alloys carry out microalloying, the intensity and heat resistance of aluminium alloy are improved.Refined degasification, slagging-off
Afterwards, Al5Zr1C alloys and mischmetal Re are added, Al5Zr1C alloys and mischmetal Re can be given full play to aluminium alloy
Crystal grain refinement and the deep purifying effect of liquid, further improve the intensity and heat resistance of aluminium alloy.Drilling rod of the invention is with high-strength
Heat-resisting aluminium alloy is relatively low due to Cu contents, and without the expensive alloying element such as Ni, Ag, therefore production cost is also relatively
It is low.
In order to more describe drilling rod high strength heat resistant alloy of the present invention and preparation method thereof in detail, several realities are exemplified below
Example is applied to be further described.
Embodiment 1：
Drilling rod high strength heat resistant alloy of the present invention, is made up of following component and mass percent：Cu 3.5%, Mg
0.8%, Fe 0.6%, Si 0.2%, Li 0.1%, Zr 0.01%, C 0.002%, Re 0.1%, Mn≤0.1%, Zn≤0.1% is remaining
It is Al and inevitable impurity to measure, and impurity is single≤0.05%, total amount≤0.15%, wherein the Re into being grouped into and quality
Percentage is：Pr 25.2%, Nd 20.6%, Pm 21.3%, Sm 13.8%, Gd 19.1%.Preparation method is comprised the steps of：
The first step：From technical pure aluminium ingot, pure magnesium ingot, cathode copper, instant silicon, Al20Fe alloys, Al20Li alloys, Al5Zr1C
Alloy and mischmetal Re are used as raw material；
Second step：By aluminium ingot in 700 DEG C of heating fusings, and addition accounts for the cathode copper, 0.8% magnesium that raw material gross weight is 3.5%
Ingot, 0.2% instant silicon, 3% Al20Fe alloys and 0.5% Al20Li alloys, stirring are fused into aluminum alloy melt；
3rd step：Degasification is refined with carbon trichloride to aluminum alloy melt to remove the gred, it is 0.2% to add and account for raw material gross weight
Al5Zr1C alloys and 0.1% mischmetal Re, the composition that stirring enables aluminum alloy to liquid are uniform；
4th step：Aluminum alloy melt is cooled to 680 DEG C and 1 hour is stood, aluminium alloy is then cast as；
5th step：By aluminium alloy in 530 DEG C of solution treatment 1 hour, after water quenching, in 145 DEG C of Ageing Treatments 18 hours, furnace cooling
After obtain drilling rod high strength heat resistant alloy.
Embodiment 2：
Drilling rod high strength heat resistant alloy of the present invention, is made up of following component and mass percent：Cu 3.8%, Mg
1.1%, Fe 0.7%, Si 0.3%, Li 0.2%, Zr 0.015%, C 0.003%, Re 0.2%, Mn≤0.1%, Zn≤0.1% is remaining
It is Al and inevitable impurity to measure, and impurity is single≤0.05%, total amount≤0.15%, wherein the Re into being grouped into and quality
Percentage is：Pr 25.2%, Nd 20.6%, Pm 21.3%, Sm 13.8%, Gd 19.1%.Preparation method is comprised the steps of：
The first step：From technical pure aluminium ingot, pure magnesium ingot, cathode copper, instant silicon, Al20Fe alloys, Al20Li alloys, Al5Zr1C
Alloy and mischmetal Re are used as raw material；
Second step：By aluminium ingot in 700~740 DEG C of heating fusings, and addition accounts for the cathode copper, 1.1% that raw material gross weight is 3.8%
Magnesium ingot, 0.3% instant silicon, 3.5% Al20Fe alloys and 1% Al20Li alloys, stirring is fused into aluminum alloy melt；
3rd step：Degasification is refined with carbon trichloride to aluminum alloy melt to remove the gred, it is 0.3% to add and account for raw material gross weight
Al5Zr1C alloys and 0.2% mischmetal Re, the composition that stirring enables aluminum alloy to liquid are uniform；
4th step：Aluminum alloy melt is cooled to 700 DEG C and 0.7 hour is stood, aluminium alloy is then cast as；
5th step：By aluminium alloy in 525 DEG C of solution treatment 2 hours, after water quenching, in 155 DEG C of Ageing Treatments 15 hours, furnace cooling
After obtain drilling rod high strength heat resistant alloy.
Embodiment 3：
Drilling rod high strength heat resistant alloy of the present invention, is made up of following component and mass percent：Cu 4.0%, Mg
1.2%, Fe 0.8%, Si 0.4%, Li 0.3%, Zr 0.02%, C 0.004%, Re 0.3%, Mn≤0.1%, Zn≤0.1% is remaining
It is Al and inevitable impurity to measure, and impurity is single≤0.05%, total amount≤0.15%, wherein the Re into being grouped into and quality
Percentage is：Pr 25.2%, Nd 20.6%, Pm 21.3%, Sm 13.8%, Gd 19.1%.Preparation method is comprised the steps of：
The first step：From technical pure aluminium ingot, pure magnesium ingot, cathode copper, instant silicon, Al20Fe alloys, Al20Li alloys, Al5Zr1C
Alloy and mischmetal Re are used as raw material；
Second step：By aluminium ingot in 740 DEG C of heating fusings, and addition accounts for the cathode copper, 1.2% magnesium that raw material gross weight is 4.0%
Ingot, 0.4% instant silicon, 4% Al20Fe alloys and 1.5% Al20Li alloys, stirring are fused into aluminum alloy melt；
3rd step：Degasification is refined with carbon trichloride to aluminum alloy melt to remove the gred, it is 0.4% to add and account for raw material gross weight
Al5Zr1C alloys and 0.3% mischmetal Re, the composition that stirring enables aluminum alloy to liquid are uniform；
4th step：Aluminum alloy melt is cooled to 720 DEG C and 0.5 hour is stood, aluminium alloy is then cast as；
5th step：By aluminium alloy in 520 DEG C of solution treatment 1 hour, after water quenching, in 165 DEG C of Ageing Treatments 12 hours, furnace cooling
After obtain drilling rod high strength heat resistant alloy.
By National Standard of the People's Republic of China GB/T16865-2013, by the drilling rod high strength heat resistant of embodiment 1-3
Alloy and drilling rod high strength heat resistant alloy of the heat exposure after 500 hours is processed into standard tensile specimen respectively at 200 DEG C,
Room temperature tensile is carried out on DNS200 type electronic tensile test machines, rate of extension is 2 mm/mins, the tensile mechanical properties such as He of table 1
Shown in table 2.
The room temperature tensile mechanical property of the embodiment 1-3 drilling rod high strength heat resistant alloys of table 1
| Embodiment sequence number | Tensile strength/MPa | Yield strength/MPa | Elongation/% |
| Embodiment 1 | 557.1 | 508.1 | 14.7 |
| Embodiment 2 | 575.4 | 528.4 | 11.2 |
| Embodiment 3 | 591.2 | 544.6 | 9.9 |
The embodiment 1-3 drilling rods high strength heat resistant alloy of the table 2 room temperature tensile mechanical property of heat exposure after 500 hours at 200 DEG C
Energy
| Embodiment sequence number | Tensile strength/MPa | Yield strength/MPa | Elongation/% |
| Embodiment 1 | 512.1 | 476.4 | 12.9 |
| Embodiment 2 | 534.9 | 510.1 | 10.3 |
| Embodiment 3 | 565.4 | 539.2 | 8.6 |
From the testing result of Tables 1 and 2, the room temperature tensile intensity of drilling rod high strength heat resistant alloy of the present invention is more than
550MPa, yield strength is more than 500MPa, and elongation is more than 9%, room temperature tensile intensity of the heat exposure after 500 hours at 200 DEG C
More than 510MPa, yield strength is more than 475MPa, and elongation is more than 8%, with intensity it is high, heat resistance is fine the characteristics of.In addition,
The Cu contents of drilling rod high strength heat resistant alloy of the present invention are relatively low, and without the expensive alloying element such as Ni, Ag, therefore also
Have the advantages that production cost is relatively low.Drilling rod high strength heat resistant alloy of the present invention is suitable for the oil such as manufacture deep-well, ultradeep well
Gas mineral resources exploration aluminium drill pipe, with wide market application foreground.
The present invention is described by embodiment, but is not limited the invention, with reference to description of the invention, institute
Other changes of disclosed embodiment, such as the professional person for this area is readily apparent that, such change should belong to
Within the scope of the claims in the present invention are limited.
Claims (3)
1. a kind of drilling rod high strength heat resistant alloy, it is characterised in that be made up of following component and mass percent：Cu 3.5~
4.0%, Mg 0.8~1.2%, Fe 0.6~0.8%, Si 0.2~0.4%, Li 0.1~0.3%, Zr 0.01~0.02%, C
0.002~0.004%, Re 0.1~0.3%, Mn≤0.1%, Zn≤0.1%, balance of Al and inevitable impurity, impurity list
It is individual≤0.05%, total amount≤0.15%, wherein the Re into being grouped into and mass percent is：Pr 25.2%, Nd 20.6%, Pm
21.3%, Sm 13.8%, Gd 19.1%.
2. drilling rod high strength heat resistant alloy according to claim 1, it is characterised in that by following component and quality percentage
Than composition：Cu 3.8%, Mg 1.1%, Fe 0.7%, Si 0.3%, Li 0.2%, Zr 0.015%, C 0.003%, Re 0.2%, Mn
≤ 0.1%, Zn≤0.1%, balance of Al and inevitable impurity, impurity is single≤0.05%, total amount≤0.15%, wherein institute
State Re into being grouped into and mass percent is：Pr 25.2%, Nd 20.6%, Pm 21.3%, Sm 13.8%, Gd 19.1%.
3. a kind of method for preparing the drilling rod high strength heat resistant alloy as described in above-mentioned any claim, it is characterised in that including
Following steps：
The first step：From technical pure aluminium ingot, pure magnesium ingot, cathode copper, instant silicon, Al20Fe alloys, Al20Li alloys, Al5Zr1C
Alloy and mischmetal Re are used as raw material；
Second step：By aluminium ingot in 700~740 DEG C of heating fusings, and addition accounts for the electrolysis that raw material gross weight is 3.5~4.0%
Copper, 0.8~1.2% magnesium ingot, 0.2~0.4% instant silicon, 3~4% Al20Fe alloys and 0.5~1.5% Al20Li are closed
Gold, stirring is fused into aluminum alloy melt；
3rd step：After to aluminum alloy melt refining degasification slagging-off, the Al5Zr1C for accounting for that raw material gross weight is 0.2~0.4% is added
Alloy and 0.1~0.3% mischmetal Re, the composition that stirring enables aluminum alloy to liquid are uniform；
4th step：Aluminum alloy melt is cooled to 680~720 DEG C and 0.5~1 hour is stood, aluminium alloy is then cast as；
5th step：By aluminium alloy in 520~530 DEG C of solution treatment 1~3 hour, after water quenching, in 145~165 DEG C of Ageing Treatments 12
~18 hours, drilling rod high strength heat resistant alloy is obtained after furnace cooling.
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Cited By (1)
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| CN115449730A (en) * | 2022-09-06 | 2022-12-09 | 合肥通用机械研究院有限公司 | Method for effectively reducing corrosion rate of low-silicon cast aluminum alloy |
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