CN115570002A - Preparation method of GH4738 high-temperature alloy cold-drawn wire for spring wire - Google Patents
Preparation method of GH4738 high-temperature alloy cold-drawn wire for spring wire Download PDFInfo
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- CN115570002A CN115570002A CN202211146648.0A CN202211146648A CN115570002A CN 115570002 A CN115570002 A CN 115570002A CN 202211146648 A CN202211146648 A CN 202211146648A CN 115570002 A CN115570002 A CN 115570002A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/003—Drawing materials of special alloys so far as the composition of the alloy requires or permits special drawing methods or sequences
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
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- C—CHEMISTRY; METALLURGY
- 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
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
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- C—CHEMISTRY; METALLURGY
- 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
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
Abstract
The invention discloses a preparation method of a GH4738 high-temperature alloy cold-drawn wire for a spring wire, which comprises the steps of placing a GH4738 alloy under a protective gas for solution treatment, cooling to obtain the solution-treated GH4738 alloy, and drawing and reducing the solution-treated GH4738 alloy to obtain a wire blank; and (3) carrying out multiple annealing treatments and drawing diameter reduction on the wire blank to obtain the GH4738 high-temperature alloy cold-drawn wire for the spring wire. The GH4738 high-temperature alloy cold-drawn wire for the spring wire, which is prepared by the invention, has the tensile strength of more than or equal to 1220MPa, the yield strength of more than or equal to 792MPa, the elongation of more than or equal to 21 percent and the reduction of area of more than or equal to 24.5 percent, is far higher than the related industrial standards, can occupy the share in the market of high-end special spring materials, and can be applied to the fields of aerospace, nuclear power, automobiles and the like.
Description
Technical Field
The invention relates to the technical field of alloy material metallurgy, in particular to a preparation method of a GH4738 high-temperature alloy cold-drawn wire material for a spring wire.
Background
GH4738 alloy (U.S. brand Waspaloy) is Ni-Cr-Co based precipitation hardening type hard-to-deform high-temperature alloy, and the main strengthening phases are gamma' phase, MC and M23C6 type carbide. The GH4738 alloy is a key high-temperature alloy material with the most excellent comprehensive performance at the use temperature of above 800 ℃, has high strength, high oxidation resistance, corrosion resistance and good formability and weldability at the temperature of below 815 ℃, so the GH4738 alloy is widely applied to key parts in the fields of aerospace, nuclear power, automobiles and the like, and is mainly used for manufacturing springs of relevant components of aeroengines, nuclear reactors, automobile turbochargers and the like.
With the development of the fields of aerospace, nuclear power, automobiles and the like at home and abroad, higher requirements are put forward for special springs of related components in the fields. The GH4738 alloy is used for preparing the material for the special spring, and has great research value and market prospect.
At present, a rotary swaging process is mostly adopted in GH4738 alloy preparation, but the preparation cycle time is long due to a processing mode and the performance of the GH4738 alloy, and the preparation process is not suitable for industrial batch production. Roll mode continuous wire drawing has been used for the preparation of alloy materials and has a better effect with respect to the swaging process. It would be desirable to provide a method for producing GH4738 alloy by continuous wire drawing in a roll mode.
Disclosure of Invention
The GH4738 high-temperature alloy cold-drawn wire material for the spring wire is prepared by adopting roller mode continuous wire drawing, the surface quality, the tissue uniformity and the yield of the GH4738 high-temperature alloy cold-drawn wire material for the spring wire can be effectively improved, and the stable and batch production of the GH4738 high-temperature alloy cold-drawn wire material for the spring wire is realized.
In order to achieve the above object, the present invention provides a method for preparing a GH4738 superalloy cold-drawn wire for spring wire, comprising,
placing the GH4738 alloy under a protective gas for solution treatment, cooling to obtain a solution treated GH4738 alloy, and drawing and reducing the solution treated GH4738 alloy to obtain a wire blank;
and (3) carrying out multiple annealing treatments and drawing reducing on the wire blank to obtain the GH4738 high-temperature alloy cold-drawn wire for the spring wire.
Further, the method comprises the steps of putting the GH4738 alloy under a protective gas for solution treatment, cooling to obtain the solution treated GH4738 alloy, and drawing and reducing the solution treated GH4738 alloy to obtain a wire blank,
after the surface treatment of the GH4738 alloy, placing the GH4738 alloy in protective gas, preserving the heat for 60-90 min at the temperature of 1060-1080 ℃, and naturally cooling to obtain a solution treatment GH4738 alloy;
drawing and reducing the solution treated GH4738 alloy at a working ratio of 25-40% to obtain a wire blank.
Further, the GH4738 high-temperature alloy cold-drawn wire for spring wires is obtained by carrying out multiple annealing treatments and drawing diameter reduction on the wire blank,
setting the annealing treatment parameters of each pass to be 1020-1040 ℃, setting the time to be 30-60 min, and controlling the processing rate of each pass of drawing and reducing except the final pass to be 30-40%.
Further, the processing rate of the final drawing and reducing is controlled to be 20% to 30%.
Further, the shielding gas includes an inert gas.
Furthermore, the annealing treatment and the drawing reducing are carried out for a plurality of times, the number of times is more than or equal to two,
wherein, the processing rate of each drawing reducing is the same or different.
The invention also provides a GH4738 high-temperature alloy cold-drawing wire material for spring wires, which is prepared according to the method.
Furthermore, the tensile strength of the GH4738 high-temperature alloy cold-drawn wire material for the spring wire is not less than 1220MPa, the yield strength is not less than 792MPa, the elongation is not less than 21%, and the reduction of area is not less than 24.5%.
Compared with the prior art, the invention has the following beneficial effects:
the invention utilizes roller mode continuous wire drawing, can effectively improve the surface quality, the tissue uniformity and the yield of the GH4738 high-temperature alloy cold-drawn wire material for the spring wire, and realizes the stable and batch production of the GH4738 high-temperature alloy cold-drawn wire material for the spring wire. The GH4738 high-temperature alloy cold-drawn wire for the spring wire, which is prepared by the invention, has the tensile strength of more than or equal to 1220MPa, the yield strength of more than or equal to 792MPa, the elongation of more than or equal to 21 percent and the reduction of area of more than or equal to 24.5 percent, is far higher than the related industrial standards, can occupy the share in the market of high-end special spring materials, and can be applied to the fields of aerospace, nuclear power, automobiles and the like.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the steps and processes particularly pointed out in the written description and drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 shows a flow chart of a preparation method of a GH4738 high-temperature alloy cold-drawn wire material for a spring wire of the invention;
FIG. 2 shows the metallographic structure of a GH4738 superalloy cold-drawn wire material for a spring wire according to example 1 of the present invention;
FIG. 3 shows the metallographic structure of a GH4738 superalloy cold-drawn wire material for a spring wire according to example 2 of the present invention;
FIG. 4 shows the metallographic structure of a GH4738 superalloy cold-drawn wire material for a spring wire according to example 3 of the present invention;
FIG. 5 shows the metallographic structure of GH4738 superalloy cold-drawn wire material for spring wire according to a comparative example of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention and the accompanying drawings in the specification, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in FIG. 1, the invention provides a preparation method of GH4738 high-temperature alloy cold-drawing wire material for spring wire, which comprises the following steps,
and S101, placing the GH4738 alloy under a protective gas for solution treatment, cooling to obtain a solution treated GH4738 alloy, and drawing and reducing the solution treated GH4738 alloy to obtain a wire blank.
The method comprises the following steps of (1) performing surface treatment on GH4738 alloy, placing the treated alloy under a protective gas, wherein the protective gas comprises inert gas, performing heat preservation for 60-90 min at the temperature of 1060-1080 ℃, and naturally cooling to obtain solution treatment GH4738 alloy; and drawing and reducing the solution treated GH4738 alloy at a working ratio of 25-40% to obtain a wire blank. It should be noted that the surface treatment is to decontaminate and planarize the GH4738 alloy by conventional means.
And S102, carrying out multiple annealing treatments and drawing reducing on the wire blank to obtain the GH4738 high-temperature alloy cold-drawn wire for spring wires.
Wherein, the drawing and reducing and the annealing treatment are carried out for a plurality of times, the number of the times is more than or equal to two, the annealing treatment parameter of each time is set to be 1020-1040 ℃, the time is 30-60 min, the processing rate of each drawing and reducing except the last time is controlled to be 30-40%, the processing rate of each drawing and reducing is the same or different, and the processing rate of the drawing and reducing of the last time is controlled to be 20-30%.
The following will explain the preparation method of GH4738 high-temperature alloy cold-drawn wire material for spring wire according to the invention in detail with reference to specific examples.
Example 1
A preparation method of GH4738 high-temperature alloy cold-drawn wire for spring wire comprises the following steps,
step 1, after carrying out surface treatment on a GH4738 hot rolled bar with the phi of 8.0mm, transferring the GH4738 hot rolled bar into a heat treatment furnace, introducing argon into the heat treatment furnace, starting heating, keeping the temperature of the GH4738 hot rolled bar with the phi of 8.0mm in the heat treatment furnace in an argon atmosphere at 1060 ℃ for 60min, stopping heating the heat treatment furnace, and naturally cooling the GH4738 hot rolled bar with the phi of 8.0mm after heat preservation to 25 ℃ at room temperature to obtain solution treatment GH4738 alloy;
step 2, putting the solution treated GH4738 alloy obtained in the step 1 into a roller mode continuous wire drawing machine for roller mode continuous wire drawing, and drawing and reducing at a processing rate of 34% and a wire drawing rate of 0.8m/s to obtain a wire blank with the diameter of 6.5 mm;
step 3, placing the phi 6.5mm wire blank obtained in the step 2 into an annealing furnace, introducing argon into the annealing furnace, starting heating for annealing, preserving the temperature of the phi 6.5mm wire blank at 1040 ℃ for 60min, then stopping heating of the annealing furnace, naturally cooling the preserved phi 6.5mm wire blank to the room temperature of 25 ℃ to obtain a first intermediate state wire blank, and performing solution annealing softening treatment to remove the stress of the wire blank;
step 4, putting the first intermediate state wire blank obtained in the step 3 into a roller mode continuous wire drawing machine for roller mode continuous wire drawing, and drawing and reducing at a processing rate of 31% and a wire drawing speed of 0.8m/s to obtain a second intermediate state wire blank with the diameter of 5.4 mm;
step 5, annealing the second intermediate state wire blank with the phi of 5.4mm obtained in the step 4 in the same way as the step 3; obtaining a third intermediate state wire blank;
step 6, putting the third intermediate state wire blank obtained in the step 5 into a roller mode continuous wire drawing machine for roller mode continuous wire drawing, and drawing and reducing at a processing rate of 37% and a wire drawing speed of 0.8m/s to obtain a fourth intermediate state wire blank with phi 4.3 mm;
step 7, annealing the fourth intermediate-state wire blank of phi 4.3mm obtained in the step 6 in the same way as in the step 3; obtaining a fifth intermediate wire blank;
step 8, putting the fifth intermediate state wire blank obtained in the step 7 into a roller mode continuous wire drawing machine for roller mode continuous wire drawing, and drawing and reducing at a processing rate of 34% and a wire drawing speed of 0.8m/s to obtain a sixth intermediate state wire blank with phi 3.5 mm;
step 9, annealing the sixth intermediate state wire blank with the phi of 3.5mm obtained in the step 8 in the same way as in the step 3; obtaining a seventh intermediate wire blank;
and step 10, putting the seventh intermediate state wire blank obtained in the step 9 into a roller mode continuous wire drawing machine for roller mode continuous wire drawing, and drawing and reducing the diameter at the machining rate of 27% and the wire drawing speed of 0.8m/s to obtain the GH4738 high-temperature alloy cold-drawn wire for the spring wire with the phi of 3.0 mm.
Example 2
A preparation method of GH4738 high-temperature alloy cold-drawing wire material for spring wire comprises the following steps,
step 1, carrying out surface treatment on a GH4738 hot rolled bar with the phi of 10.0mm, transferring the bar to a heat treatment furnace, introducing argon into the heat treatment furnace, starting heating, preserving the heat of the GH4738 hot rolled bar with the phi of 10.0mm in the heat treatment furnace in an argon atmosphere for 90min at 1080 ℃, stopping heating the heat treatment furnace, and naturally cooling the GH4738 hot rolled bar with the phi of 10.0mm after heat preservation to the room temperature of 25 ℃ to obtain a solution treatment GH4738 alloy;
step 2, putting the solution treated GH4738 alloy obtained in the step 1 into a roller mode continuous wire drawing machine for roller mode continuous wire drawing, and drawing and reducing at a processing rate of 28% and a wire drawing speed of 0.5m/s to obtain a wire blank with the diameter of 8.5 mm;
step 3, placing the wire blank with the phi of 8.5mm obtained in the step 2 into an annealing furnace, introducing argon into the annealing furnace, starting heating for annealing, preserving the temperature of the wire blank with the phi of 8.5mm at 1040 ℃ for 60min, then stopping heating of the annealing furnace, naturally cooling the wire blank with the phi of 8.5mm after heat preservation to the room temperature of 25 ℃ to obtain a first intermediate state wire blank, and performing solution annealing softening treatment to remove the stress of the wire blank;
step 4, putting the first intermediate state wire material blank obtained in the step 3 into a roller mode continuous wire drawing machine for roller mode continuous wire drawing, and drawing and reducing the diameter at the machining rate of 32% and the wire drawing speed of 0.5m/s to obtain a second intermediate state wire material blank with the diameter of 7.0 mm;
step 5, annealing the second intermediate state wire blank with the phi of 7.0mm obtained in the step 4 in the same way as the step 3; obtaining a third intermediate state wire blank;
step 6, putting the third intermediate state wire blank obtained in the step 5 into a roller mode continuous wire drawing machine for roller mode continuous wire drawing, and drawing and reducing at a processing rate of 38% and a wire drawing speed of 0.5m/s to obtain a fourth intermediate state wire blank with the diameter of 5.5 mm;
step 7, annealing the fourth intermediate state wire blank with the phi of 5.5mm obtained in the step 6 in the same way as in the step 3; obtaining a fifth intermediate wire blank;
step 8, putting the fifth intermediate state wire blank obtained in the step 7 into a roller mode continuous wire drawing machine for roller mode continuous wire drawing, and drawing and reducing at a processing rate of 33% and a wire drawing speed of 0.5m/s to obtain a sixth intermediate state wire blank with phi 4.5 mm;
step 9, annealing the sixth intermediate state wire blank with the phi of 4.5mm obtained in the step 8 in the same way as in the step 3; obtaining a seventh intermediate wire blank;
and step 10, putting the seventh intermediate state wire blank obtained in the step 9 into a roller mode continuous wire drawing machine for roller mode continuous wire drawing, and drawing and reducing the diameter at the working rate of 21% and the wire drawing speed of 0.5m/s to obtain the GH4738 high-temperature alloy cold-drawn wire for the spring wire with the diameter of 4.0 mm.
Example 3
A preparation method of GH4738 high-temperature alloy cold-drawing wire material for spring wire comprises the following steps,
step 1, carrying out surface treatment on a GH4738 hot rolled bar with the phi of 10.0mm, transferring the bar to a heat treatment furnace, introducing argon into the heat treatment furnace, starting heating, preserving the heat of the GH4738 hot rolled bar with the phi of 10.0mm in the heat treatment furnace in an argon atmosphere for 90min at 1080 ℃, stopping heating the heat treatment furnace, and naturally cooling the GH4738 hot rolled bar with the phi of 10.0mm after heat preservation to the room temperature of 25 ℃ to obtain a solution treatment GH4738 alloy;
step 2, putting the solution treated GH4738 alloy obtained in the step 1 into a roller mode continuous wire drawing machine for roller mode continuous wire drawing, and drawing and reducing at a processing rate of 28% and a wire drawing speed of 0.5m/s to obtain a wire blank with the diameter of 8.5 mm;
step 3, placing the phi 8.5mm wire blank obtained in the step 2 into an annealing furnace, introducing argon into the annealing furnace, starting heating for annealing, preserving the temperature of the phi 8.5mm wire blank at 1040 ℃ for 60min, then stopping heating of the annealing furnace, naturally cooling the preserved phi 8.5mm wire blank to the room temperature of 25 ℃ to obtain a first intermediate state wire blank, and performing solution annealing softening treatment to remove the stress of the wire blank;
step 4, putting the first intermediate state wire material blank obtained in the step 3 into a roller mode continuous wire drawing machine for roller mode continuous wire drawing, and drawing and reducing the diameter at the machining rate of 32% and the wire drawing speed of 0.5m/s to obtain a second intermediate state wire material blank with the diameter of 7.0 mm;
step 5, annealing the phi 7.0mm second intermediate state wire blank obtained in the step 4 in the same way as the step 3; obtaining a third intermediate state wire blank;
and 6, putting the third intermediate state wire blank obtained in the step 5 into a roller mode continuous wire drawing machine for roller mode continuous wire drawing, and drawing and reducing at a processing rate of 27% and a wire drawing speed of 0.5m/s to obtain the GH4738 high-temperature alloy cold-drawn wire for the spring wire with the phi of 6.0 mm.
Comparative example
A preparation method of GH4738 high-temperature alloy cold-drawn wire for spring wire is substantially the same as that of example 1, and only differs from the method in that: and (4) drawing and reducing the diameter by using a rotary swaging process.
Wherein the wire drawing rate of the rotary swaging process is 1.5m/min.
Test example
GH4738 high-temperature alloy cold-drawn wire materials for spring wires prepared in the embodiments 1 to 3 and the comparative example are subjected to solid solution, stabilization and aging treatment, and then the metallographic structure of the spring wire material is observed by a metallographic microscope. Wherein, the solid solution treatment: preserving the heat for 4 hours at 1040 ℃, and cooling the mixture to room temperature; and (3) stabilizing treatment: preserving the heat for 4 hours at 845 ℃, and cooling the mixture to room temperature in air; aging treatment: keeping the temperature at 760 ℃ for 16h, and cooling to room temperature in air.
FIGS. 2 to 5 are structural diagrams of metallographic structures of examples 1 to 3 and a comparative example, respectively, each having a scale of 100 μm.
As can be seen from FIG. 2, the GH4738 high-temperature alloy cold-drawn wire material for the spring wire with the phi of 3.0mm prepared in the embodiment 1 of the invention has uniform structure. As can be seen from FIG. 3, the GH4738 high-temperature alloy cold-drawn wire material for the spring wire with the phi of 4.0mm prepared in the embodiment 2 of the invention has uniform structure. As can be seen from FIG. 4, the GH4738 high-temperature alloy cold-drawn wire material for the spring wire with the phi of 6.0mm prepared in the embodiment 3 of the invention has uniform structure. FIG. 5 shows that the GH4738 high-temperature alloy cold-drawn wire material for a spring wire with a phi of 3.0mm prepared in the comparative example has a structure which is mostly elongated crystals and is not uniform. The results show that the roller die type continuous wire drawing process is obviously superior to a rotary swaging process, can prepare GH4738 for spring wires with more uniform tissues and more uniform mechanical properties, and can also produce and prepare more quickly.
After the GH4738 high-temperature alloy cold-drawn wire materials for spring wires prepared in the embodiments 1 to 3 of the invention are subjected to solid solution, stabilization and aging treatment, a size deviation test, a mechanical property test and a grain size test are carried out, wherein the solid solution treatment comprises the following steps: preserving the heat for 4 hours at 1040 ℃, and cooling the mixture to room temperature; and (3) stabilizing treatment: preserving the heat for 4 hours at 845 ℃, and cooling the mixture to room temperature in air; aging treatment: keeping the temperature at 760 ℃ for 16h, and cooling to room temperature in air. The results of these tests are shown in Table 1, where σ b For tensile strength, σ 0.2 In terms of yield strength, δ is elongation and ψ is reduction of area.
TABLE 1 test results of GH4738 high-temperature alloy cold-drawn wire for spring wire
Table 1 also shows the requirements of standard Q/S10-0410-2004 on GH4738 high-temperature alloy for spring wires, the size deviation is 0-0.04 mm, the tensile strength is more than or equal to 1100MPa, the yield strength is more than or equal to 760MPa, the elongation is more than or equal to 15%, the reduction of area is more than or equal to 18%, and the grain size is not less than 5 grade. From the test results in Table 1, it can be seen that the GH4738 high-temperature alloy cold-drawn wire materials for spring wires prepared in examples 1 to 3 of the present invention have excellent structure properties, high mechanical property numbers and high dimensional accuracy, which are far higher than the technical requirements for Q/S10-0410-2004 use.
In conclusion, the GH4738 high-temperature alloy cold-drawn wire material for the spring wire prepared by the preparation method disclosed by the invention is good in surface quality, excellent in structure performance and high in production efficiency, and the acid pickling link in the traditional process is reduced by adopting the heat treatment furnace protected by the inert gas, so that the environmental pollution is reduced, meanwhile, the preparation condition is simple, and the annealing temperature and the processing rate of drawing and reducing are strictly controlled through multiple annealing treatments and drawing and reducing. In addition, the prepared GH4738 high-temperature alloy cold-drawing wire for the spring wire is high in dimensional accuracy, the production efficiency is greatly improved compared with a rotary swaging process, the tensile strength of the prepared GH4738 high-temperature alloy cold-drawing wire for the spring wire is not less than 1220MPa, the yield strength is not less than 792MPa, the elongation is not less than 21%, the reduction of area is not less than 24.5%, and the yield is far higher than the related industrial standard and can occupy a share in the market of high-end special spring materials.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments, or make equivalent substitutions and improvements to part of the technical features of the foregoing embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A preparation method of GH4738 high-temperature alloy cold-drawn wire for spring wire is characterized by comprising the following steps,
placing the GH4738 alloy under a protective gas for solution treatment, cooling to obtain a solution treated GH4738 alloy, and drawing and reducing the solution treated GH4738 alloy to obtain a wire material blank;
and (3) carrying out multiple annealing treatments and drawing reducing on the wire blank to obtain the GH4738 high-temperature alloy cold-drawn wire for the spring wire.
2. The method of claim 1, wherein the GH4738 alloy is subjected to solution treatment under a shielding gas, the solution treated GH4738 alloy is obtained after cooling, and the solution treated GH4738 alloy is subjected to drawing and reducing to obtain a wire blank, comprising,
after the surface treatment of the GH4738 alloy, placing the GH4738 alloy in protective gas, preserving the heat for 60-90 min at the temperature of 1060-1080 ℃, and naturally cooling to obtain a solution treatment GH4738 alloy;
drawing and reducing the solution treated GH4738 alloy at a working ratio of 25-40% to obtain a wire blank.
3. The method of claim 1, wherein the wire blank is subjected to multiple annealing treatments and drawing reducing to obtain the GH4738 high-temperature alloy cold-drawn wire for spring wire, comprising,
setting the annealing treatment parameters of each pass to be 1020-1040 ℃, setting the time to be 30-60 min, and controlling the processing rate of each pass of drawing and reducing except the final pass to be 30-40%.
4. The method according to claim 3, wherein the finishing rate of the final drawing reduction is controlled to be 20% to 30%.
5. The method of claim 1, wherein the shielding gas comprises an inert gas.
6. The method according to any one of claims 1 to 5, wherein the annealing treatment and the drawing reduction are performed in a plurality of passes, the number of passes being two or more,
wherein the processing rate of each drawing reducing is the same or different.
7. A GH4738 high-temperature alloy cold-drawn wire for spring wires, characterized by being produced by the method according to any one of claims 1 to 5.
8. The GH4738 high-temperature alloy cold-drawn wire material for spring wires according to claim 7, wherein the tensile strength of the GH4738 high-temperature alloy cold-drawn wire material for spring wires is not less than 1220MPa, the yield strength is not less than 792MPa, the elongation is not less than 21%, and the reduction of area is not less than 24.5%.
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| CN202211146648.0A CN115570002A (en) | 2022-09-20 | 2022-09-20 | Preparation method of GH4738 high-temperature alloy cold-drawn wire for spring wire |
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