GH4080A alloy material for cold heading, alloy wire rod and preparation method of alloy wire rod

Abstract

The invention relates to a GH4080A alloy material for cold heading, which comprises the following chemical components in percentage by mass: 0.04 to 0.10 percent of C, less than or equal to 0.80 percent of Si, less than or equal to 0.40 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.015 percent of S, 18.0 to 21.0 percent of Cr, less than or equal to 2.0 percent of Co, less than or equal to 0.2 percent of Cu, less than or equal to 1.5 percent of Fe, 1.0 to 1.8 percent of Al, less than or equal to 0.008 percent of B, 1.8 to 2.7 percent of Ti, 0.01 to 0.20 percent of Zr and the balance of Ni. The invention further relates to a GH4080A alloy wire rod for cold heading. The GH4080A alloy wire rod for cold heading is prepared from the GH4080A alloy material for cold heading. Compared with an existing GH4080A alloy wire rod, the GH4080A alloy wire rod prepared from the GH4080A alloy material for cold heading has the advantages that the hardness is lower, the process requirement of cold heading forming can be met, and the cold forming problem of the existing GH4080A alloy material is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of manufacturing high temperature resistant fasteners for automobiles, and specifically relates to a GH4080A alloy material for cold heading, an alloy wire rod, and a preparation method and application thereof. Background Art

[0002] The general production process of fasteners is: smelting - rolling - heat treatment - drawing - cold heading - thread rolling (tapping) - heat treatment - surface treatment, etc. Among them, the cold heading process is the key process of fastener forming. The mold can well ensure the dimensional accuracy and surface finish of the fasteners. It has high production efficiency and high material utilization rate. It is suitable for automated production and is widely used in the production of standard fasteners.

[0003] High temperature fasteners are made of heat-resistant steel and high temperature alloys and are suitable for fasteners in high temperature environments. They have a high alloy content, so the forming performance is generally poor, which is mainly reflected in parts cracking, parts surface damage, mold cracking / fracture, and low mold life.

[0004] For high temperature bolts that can withstand temperatures above 700-800°C, nickel-based high temperature alloys must be used as the material. In order to facilitate cold heading, solid solution + aging strengthened alloys are generally selected. The solid solution treatment is used to reduce the hardness of the material for cold heading, and then aging treatment is performed to obtain higher mechanical properties.

[0005] The existing GH4080A alloy is suitable for high temperature environments below 800°C and is a nickel-based solid solution aging type high temperature alloy. However, it was found in the alloy production that after multiple solid solution + drawing of wire rods, the hardness of the alloy is still relatively high, still above 220HBW, and even above 260HBW. The cold heading process requires the material hardness to be as low as possible, preferably below 180HBW. This results in poor cold forming performance of the existing GH4080A alloy, and even the inability to cold form fasteners. Summary of the invention

[0006] In view of the defects existing in the prior art, the purpose of the present invention is to provide a GH4080A alloy material for cold heading, an alloy wire rod and a preparation method and application thereof. The GH4080A alloy wire rod prepared by using the GH4080A alloy material for cold heading provided by the present invention has a lower hardness than the existing GH4080A alloy wire rod, can meet the process requirements of cold heading forming, and solves the cold forming problem of the existing GH4080A alloy material.

[0007] To achieve the above objectives, the first aspect of the present invention provides a GH4080A alloy material for cold heading. The chemical composition of the GH4080A alloy material for cold heading is, by mass percentage, C: 0.04%-0.10%, Si≤0.80%, Mn≤0.40%, P≤0.020%, S≤0.015%, Cr: 18.0%-21.0%, Co≤2.0%, Cu≤0.2%, Fe≤1.5%, Al: 1.0%-1.8%, B≤0.008%, Ti: 1.8%-2.7%, Zr: 0.01%-0.20%, and the balance is Ni.

[0008] The GH4080A alloy material for cold heading provided by the present invention is based on the existing GH4080A alloy formula, and the Zr element is concentrated at the grain boundary, which can reduce grain boundary defects, improve grain boundary bonding, strengthen grain boundaries, improve material plasticity, and improve material forming performance. At the same time, it can also increase the high-temperature endurance life of the material, improve high-temperature endurance plasticity, eliminate notch sensitivity, and thus improve the performance of high-temperature resistant fasteners.

[0009] In the present invention, the addition amount of Zr element in the GH4080A alloy material for cold heading is controlled to be 0.01%-0.20%, preferably 0.04%-0.07%. The inventors have found that Zr, as a trace element, cannot fully play its role if the addition amount is insufficient; if the addition amount is too much, trace element compounds may be generated or grain boundary compounds may surround the grain boundary in a thin film, which reduces the mechanical properties, plasticity, and poor forming performance.

[0010] A second aspect of the present invention provides a GH4080A alloy wire rod for cold heading, which is prepared using the GH4080A alloy material for cold heading according to the first aspect of the present invention.

[0011] A third aspect of the present invention provides a method for preparing a GH4080A alloy wire rod for cold heading, the method comprising the following steps:

[0012] According to the requirements of chemical composition, the raw materials are smelted to obtain a GH4080A alloy material ingot for cold heading; wherein, in terms of mass percentage, the chemical composition of the GH4080A alloy material ingot for cold heading is: C: 0.04%-0.10%, Si≤0.80%, Mn≤0.40%, P≤0.020%, S≤0.015%, Cr: 18.0%-21.0%, Co≤2.0%, Cu≤0.2%, Fe≤1.5%, Al: 1.0%-1.8%, B≤0.008%, Ti: 1.8%-2.7%, Zr: 0.01%-0.20%, and the balance is Ni;

[0013] The ingot is subjected to diffusion annealing, blanking and rolling treatment to obtain GH4080A alloy wire rod;

[0014] The GH4080A alloy wire rod is subjected to a first solid solution treatment, drawing, a second solid solution treatment and a post-treatment to obtain the GH4080A alloy wire rod for cold heading.

[0015] In the present invention, after smelting is completed, the ingot is subjected to diffusion annealing treatment.

[0016] In the present invention, diffusion annealing is performed after smelting is completed. Since there are a large number of alloying elements in the high-temperature alloy, there will be serious component segregation after casting, so diffusion annealing is required to improve component segregation and organizational uniformity.

[0017] In some preferred embodiments, the diffusion annealing is performed at a temperature of 1100-1200° C. for a holding time of 100-150 hours. In some more preferred embodiments, the diffusion annealing is performed at a temperature of 1190° C. for a holding time of 120 hours.

[0018] In the present invention, since the atomic diffusion is accelerated at high temperature, it is beneficial to the diffusion annealing effect and shortens the time, but too high a temperature may deteriorate the performance, and the region where the local elements are segregated may experience grain boundary melting and oxidation, resulting in overheating and overburning, and the plasticity of the material is reduced. Therefore, in the present invention, the diffusion annealing temperature and time are limited to the above range.

[0019] In some preferred embodiments, the temperature of the first solution treatment is 1000-1100°C, and the holding time is 0.5-1h. In some more preferred embodiments, the temperature of the first solution treatment is 1050-1080°C.

[0020] The inventors have found that when the temperature exceeds 1100°C during the first solution treatment, grain coarsening will occur, which cannot be repaired in the subsequent process, and ultimately leads to coarse grains in high-temperature resistant fasteners, poor material plasticity, and low strength. Too low a temperature will affect the solution effect, and if the solution hardness is not low enough, the material forming performance will be poor. Therefore, in the present invention, the temperature of the first solution treatment is limited to the above range.

[0021] In some preferred embodiments, the preparation method further comprises: performing a rapid cooling treatment after the first solution treatment and before the drawing treatment, with a cooling rate of ≥10°C / s;

[0022] After the second solution treatment and before the post-treatment, a rapid cooling treatment is performed with a cooling rate of ≥10°C / s.

[0023] In the present invention, water cooling or oil cooling can be used for rapid cooling. When water cooling is used, the cooling rate can be 60-80°C / s. When oil cooling is used, the cooling rate can be 20-30°C / s.

[0024] In the present invention, rapid cooling treatment is performed after the first solution treatment and the second solution treatment. This is because: GH4080A belongs to a solution + aging type high-temperature alloy. Most of the precipitates such as γ′ and carbide phases are dissolved into the matrix through the solution process to form a single-phase γ austenite structure. Finally, fine and uniform γ′ and carbide phases are precipitated through the aging process, which greatly improves the strength of the high-temperature alloy. Since the γ′ phase and carbide phase of GH4080A will precipitate between 500-1000°C, the precipitation peak of the γ′ phase is about 700°C, and the precipitation peak of the carbide phase is about 850°C. Under normal circumstances, during the cooling process after the solution treatment of GH4080A, the γ′ phase and the carbide phase will precipitate, resulting in a hardness of ≥250HBW after the solution treatment; and by means of rapid cooling after the solution treatment, the precipitation of the γ′ phase and the carbide phase is suppressed, and the hardness after the solution treatment is very low, which can improve the cold heading (cold forming) performance of the material. If the cooling rate is too low, the hardness of the wire rod will be very high after solid solution and the material forming performance will be very poor.

[0025] In some preferred embodiments, the rapid cooling process may be performed by water cooling or oil cooling.

[0026] In some preferred embodiments, during the drawing process, the drawing reduction ratio is controlled to be 20%-35%.

[0027] In the present invention, after the first solution treatment, a drawing treatment is performed to draw the hot rolled material into a specification close to that of the finished product, thereby improving the roundness and surface quality of the hot rolled material. In the drawing treatment, by controlling the drawing reduction ratio, the wire rod is uniformly deformed and the grains are broken. When recrystallization occurs in the subsequent second solution treatment, grain coarsening can be avoided, large grains appear, and the uniformity of the grains is better. On the one hand, the refinement of uniform grains can improve the performance of the finished fasteners. On the other hand, coarse grains will cause the surface of the fasteners to have an orange peel phenomenon after forming.

[0028] In some preferred embodiments, the temperature of the second solution treatment is 1000-1100°C, preferably 1050-1080°C, and the DV value is 25-35mm*m / min. In the present invention, D is the wire diameter (mm), V is the wire annealing speed (m / min), and the DV value is equal to the wire diameter*wire annealing speed. If the DV value is too large, the wire rod will not stay in the furnace for a long time, the solid solution will not be sufficient, the hardness of the obtained wire rod will be high, and the material forming performance will be poor; if the DV value is too small, the production efficiency will be affected, and the grains will be coarse, the material plasticity will be poor, and the strength will also be low.

[0029] In the present invention, during the second solution treatment, the temperature and DV value are controlled to avoid grain coarsening caused by long-term heating. Because grain coarsening will lead to coarse grains in the finished high-temperature resistant fastener. On the one hand, it will cause orange peel to appear on the surface of the fastener during molding, and on the other hand, it will reduce the strength of the fastener and reduce the molding performance.

[0030] In the present invention, the method of post-processing the coil includes copper plating and finishing treatment.

[0031] In some preferred embodiments, the finishing treatment includes: immersing the copper-plated wire rod in a saponification solution, and then performing a cold drawing treatment, wherein the cold drawing deformation amount is 2%-5%.

[0032] During molding, the material is in direct contact with the mold. In mass production, the material and the mold surface will be easily worn, which will affect the mold life and cause material surface damage (scratches, etc.). Adding surface copper plating and saponification is to separate the contact between the material and the mold, increase lubrication during molding, reduce wear of the material and the mold, and improve molding performance.

[0033] In the present invention, the cold drawing deformation is controlled to be 2%-5%. If the cold drawing deformation is too large, the hardness of the material will increase greatly, which is not conducive to forming. If the cold drawing deformation is too small, there may be no effect. The cold drawing process can also improve the adhesion effect of the copper plating layer.

[0034] In the present invention, the yield platform of the material can be eliminated through finishing treatment, the cold heading forming performance of the material can be improved, and the "surface orange peel" defect of cold heading forming can be avoided. At the same time, due to the Bauschinger effect, the yield stress of the material compression is reduced, the upsetting force of the forming is reduced (reducing the forming difficulty and improving the cold heading performance), and the mold life is improved.

[0035] In some preferred embodiments, the hardness of the GH4080A alloy wire rod for cold heading is ≤180 HBW, preferably 150-180 HBW; the tensile strength is ≤900 MPa, the surface quality is good, the surface lubrication condition is good, and the cold heading performance is excellent.

[0036] The fourth aspect of the present invention provides an application of the GH4080A alloy material for cold heading according to the first aspect of the present invention, or the GH4080A alloy wire rod for cold heading according to the second aspect of the present invention, or the GH4080A alloy wire rod for cold heading prepared by the method described in the third aspect of the present invention in cold heading forming of high temperature resistant fasteners.

[0037] After the GH4080A alloy wire rod prepared by the present invention is made into a bolt and then subjected to aging treatment (700°C*16h), the room temperature tensile strength of the obtained bolt is ≥1200MPa, the tensile strength at 800°C is ≥600MPa, and the high temperature resistance is excellent.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] The present invention reduces the material strength / hardness and improves the material plasticity from the perspective of chemical composition and preparation process, making the hard-to-deform nickel-based alloy more suitable for cold heading forming, and solving the problem of large-scale production of high-temperature resistant fasteners (such as bolts and nuts). The GH4080A alloy wire rod for cold heading prepared by the present invention has lower hardness and good plasticity, and the bolts prepared from the alloy wire rod have excellent high-temperature resistance, and are superior in room temperature strength, high-temperature strength and plasticity. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] Unless otherwise specified, the raw materials used in the examples of the present invention are all commercially available, the instruments and equipment used are all conventional instruments and equipment in the art, and the operating methods used are all conventional methods in the art.

[0042] Unless otherwise specified, the percentages used in the embodiments of the present invention refer to percentages by mass.

[0043] Example

[0044] Example 1

[0045] The preparation method of GH4080A alloy wire rod for cold heading provided in this embodiment comprises the following steps:

[0046] S1, according to the chemical composition requirements, the raw materials are smelted in a vacuum induction furnace in a steel plant, and then the materials are purified through an electroslag remelting process to obtain a GH4080A alloy material ingot for cold heading; wherein, the chemical composition of the GH4080A alloy material ingot for cold heading is, by mass percentage, C: 0.06%, Si: 0.10%, Mn: 0.01%, P: 0.002%, S: 0.001%, Cr: 19.58%, Co: 0.01%, Cu: 0.01%, Fe: 0.73%, Al: 1.61%, B: 0.0035%, Ti: 2.54%, Zr: 0.05%, and the balance is Ni;

[0047] S2, diffusion annealing the ingot at a temperature of 1190° C. and a holding time of 120 h;

[0048] S3, opening the ingot after diffusion annealing, grinding the surface defects, and rolling to obtain GH4080A alloy wire rod;

[0049] S4, in a nitrogen atmosphere, the GH4080A alloy wire rod was subjected to the first solution treatment in a pit furnace at a temperature of 1060°C and a holding time of 1 h, and then rapidly water-cooled after being taken out of the furnace at a cooling rate of 70°C / s;

[0050] S5, the GH4080A alloy wire rod obtained after water cooling is passed through a wire drawing powder box for cold drawing. Pull to Drawing reduction ratio is 30%;

[0051] S6, in a protective atmosphere of nitrogen and hydrogen, the GH4080A alloy wire rod after cold drawing was subjected to a second solution treatment in a tubular furnace at a temperature of 1070°C and a holding time of 0.5h, with a DV value of 28mm*m / min, and rapid water cooling after being taken out of the furnace, with a cooling rate of 70°C / s;

[0052] S7, cleaning and copper plating the GH4080A alloy wire rod obtained after water cooling;

[0053] S8, immerse the copper-plated wire rod in saponification solution, and then cold draw it. Pull to The cold drawing deformation is 4.3%, and the GH4080A alloy wire rod for cold heading is obtained. The performance test results are shown in Table 1.

[0054] Example 2

[0055] The preparation method of GH4080A alloy wire rod for cold heading provided in this embodiment comprises the following steps:

[0056] S1, according to the chemical composition requirements, the raw materials are smelted in a vacuum induction furnace in a steel plant, and then the materials are purified through an electroslag remelting process to obtain a GH4080A alloy material ingot for cold heading; wherein, by mass percentage, the chemical composition of the GH4080A alloy material ingot for cold heading is: C: 0.06%, Si: 0.10%, Mn: 0.01%, P: 0.002%, S: 0.001%, Cr: 19.58%, Co: 0.01%, Cu: 0.01%, Fe: 0.73%, Al: 1.61%, B: 0.0035%, Ti: 2.54%, Zr: 0.07%, and the balance is Ni;

[0057] S2, diffusion annealing the ingot at a temperature of 1190° C. and a holding time of 120 h;

[0058] S3, opening the ingot after diffusion annealing, grinding the surface defects, and rolling to obtain GH4080A alloy wire rod;

[0059] S4, in a nitrogen atmosphere, the GH4080A alloy wire rod was subjected to the first solution treatment in a pit furnace at a temperature of 1060°C and a holding time of 1 h, and then rapidly water-cooled after being taken out of the furnace at a cooling rate of 70°C / s;

[0060] S5, the GH4080A alloy wire rod obtained after water cooling is passed through a wire drawing powder box for cold drawing. Pull to Drawing reduction ratio is 30%;

[0061] S6, in a protective atmosphere of nitrogen and hydrogen, the GH4080A alloy wire rod after cold drawing was subjected to a second solution treatment in a tubular furnace at a temperature of 1070°C and a holding time of 0.5h, with a DV value of 28mm*m / min, and rapid water cooling after being taken out of the furnace, with a cooling rate of 70°C / s;

[0062] S7, cleaning and copper plating the GH4080A alloy wire rod obtained after water cooling;

[0063] S8, immerse the copper-plated wire rod in saponification solution, and then cold draw it. Pull to The cold drawing deformation is 4.3%, and the GH4080A alloy wire rod for cold heading is obtained. The performance test results are shown in Table 1.

[0064] Example 3

[0065] The preparation method of GH4080A alloy wire rod for cold heading provided in this embodiment comprises the following steps:

[0066] S1, according to the chemical composition requirements, the raw materials are smelted in a vacuum induction furnace in a steel plant, and then the materials are purified through an electroslag remelting process to obtain a GH4080A alloy material ingot for cold heading; wherein, the chemical composition of the GH4080A alloy material ingot for cold heading is, by mass percentage, C: 0.06%, Si: 0.10%, Mn: 0.01%, P: 0.002%, S: 0.001%, Cr: 19.58%, Co: 0.01%, Cu: 0.01%, Fe: 0.73%, Al: 1.61%, B: 0.0035%, Ti: 2.54%, Zr: 0.20%, and the balance is Ni;

[0067] S2, diffusion annealing the ingot at a temperature of 1190° C. and a holding time of 120 h;

[0068] S3, opening the ingot after diffusion annealing, grinding the surface defects, and rolling to obtain GH4080A alloy wire rod;

[0069] S4, in a nitrogen atmosphere, the GH4080A alloy wire rod was subjected to the first solution treatment in a pit furnace at a temperature of 1060°C and a holding time of 1 h, and then rapidly water-cooled after being taken out of the furnace at a cooling rate of 70°C / s;

[0070] S5, the GH4080A alloy wire rod obtained after water cooling is passed through a wire drawing powder box for cold drawing. Pull to Drawing reduction ratio is 30%;

[0071] S6, in a protective atmosphere of nitrogen and hydrogen, the GH4080A alloy wire rod after cold drawing was subjected to a second solution treatment in a tubular furnace at a temperature of 1070°C and a holding time of 0.5h, with a DV value of 28mm*m / min, and rapid water cooling after being taken out of the furnace, with a cooling rate of 70°C / s;

[0072] S7, cleaning and copper plating the GH4080A alloy wire rod obtained after water cooling;

[0073] S8, immerse the copper-plated wire rod in saponification solution, and then cold draw it. Pull to The cold drawing deformation is 4.3%, and the GH4080A alloy wire rod for cold heading is obtained. The performance test results are shown in Table 1.

[0074] Example 4

[0075] The preparation method of GH4080A alloy wire rod for cold heading provided in this embodiment comprises the following steps:

[0076] S1, according to the chemical composition requirements, the raw materials are smelted in a vacuum induction furnace in a steel plant, and then the materials are purified through an electroslag remelting process to obtain a GH4080A alloy material ingot for cold heading; wherein, the chemical composition of the GH4080A alloy material ingot for cold heading is, by mass percentage, C: 0.06%, Si: 0.10%, Mn: 0.01%, P: 0.002%, S: 0.001%, Cr: 19.58%, Co: 0.01%, Cu: 0.01%, Fe: 0.73%, Al: 1.61%, B: 0.0035%, Ti: 2.54%, Zr: 0.05%, and the balance is Ni;

[0077] S2, diffusion annealing the ingot at a temperature of 1250° C. and a holding time of 120 h;

[0078] S3, opening the ingot after diffusion annealing, grinding the surface defects, and rolling to obtain GH4080A alloy wire rod;

[0079] S4, in a nitrogen atmosphere, the GH4080A alloy wire rod was subjected to the first solution treatment in a pit furnace at a temperature of 1060°C and a holding time of 1 h, and then rapidly water-cooled after being taken out of the furnace at a cooling rate of 70°C / s;

[0080] S5, the GH4080A alloy wire rod obtained after water cooling is passed through a wire drawing powder box for cold drawing. Pull to Drawing reduction ratio is 30%;

[0081] S6, in a protective atmosphere of nitrogen and hydrogen, the GH4080A alloy wire rod after cold drawing was subjected to a second solution treatment in a tubular furnace at a temperature of 1070°C and a holding time of 0.5h, with a DV value of 28mm*m / min, and rapid water cooling after being taken out of the furnace, with a cooling rate of 70°C / s;

[0082] S7, cleaning and copper plating the GH4080A alloy wire rod obtained after water cooling;

[0083] S8, immerse the copper-plated wire rod in saponification solution, and then cold draw it. Pull to The cold drawing deformation is 4.3%, and the GH4080A alloy wire rod for cold heading is obtained. The performance test results are shown in Table 1.

[0084] Example 5

[0085] The preparation method of GH4080A alloy wire rod for cold heading provided in this embodiment comprises the following steps:

[0086] S1, according to the chemical composition requirements, the raw materials are smelted in a vacuum induction furnace in a steel plant, and then the materials are purified through an electroslag remelting process to obtain a GH4080A alloy material ingot for cold heading; wherein, the chemical composition of the GH4080A alloy material ingot for cold heading is, by mass percentage, C: 0.06%, Si: 0.10%, Mn: 0.01%, P: 0.002%, S: 0.001%, Cr: 19.58%, Co: 0.01%, Cu: 0.01%, Fe: 0.73%, Al: 1.61%, B: 0.0035%, Ti: 2.54%, Zr: 0.05%, and the balance is Ni;

[0087] S2, diffusion annealing the ingot at a temperature of 1190° C. and a holding time of 120 h;

[0088] S3, opening the ingot after diffusion annealing, grinding the surface defects, and rolling to obtain GH4080A alloy wire rod;

[0089] S4, in a nitrogen atmosphere, the GH4080A alloy wire rod was subjected to the first solution treatment in a pit furnace at a temperature of 950°C and a holding time of 1 h, and then rapidly water-cooled after being taken out of the furnace at a cooling rate of 70°C / s;

[0090] S5, the GH4080A alloy wire rod obtained after water cooling is passed through a wire drawing powder box for cold drawing. Pull to Drawing reduction ratio is 30%;

[0091] S6, in a protective atmosphere of nitrogen and hydrogen, the GH4080A alloy wire rod after cold drawing was subjected to a second solution treatment in a tubular furnace at a temperature of 950°C and a holding time of 0.5h, with a DV value of 28mm*m / min, and rapid water cooling after being taken out of the furnace, with a cooling rate of 70°C / s;

[0092] S7, cleaning and copper plating the GH4080A alloy wire rod obtained after water cooling;

[0093] S8, immerse the copper-plated wire rod in saponification solution, and then cold draw it. Pull to The cold drawing deformation is 4.3%, and the GH4080A alloy wire rod for cold heading is obtained. The performance test results are shown in Table 1.

[0094] Example 6

[0095] The preparation method of GH4080A alloy wire rod for cold heading provided in this embodiment comprises the following steps:

[0096] S1, according to the chemical composition requirements, the raw materials are smelted in a vacuum induction furnace in a steel plant, and then the materials are purified through an electroslag remelting process to obtain a GH4080A alloy material ingot for cold heading; wherein, the chemical composition of the GH4080A alloy material ingot for cold heading is, by mass percentage, C: 0.06%, Si: 0.10%, Mn: 0.01%, P: 0.002%, S: 0.001%, Cr: 19.58%, Co: 0.01%, Cu: 0.01%, Fe: 0.73%, Al: 1.61%, B: 0.0035%, Ti: 2.54%, Zr: 0.05%, and the balance is Ni;

[0097] S2, diffusion annealing the ingot at a temperature of 1190° C. and a holding time of 120 h;

[0098] S3, opening the ingot after diffusion annealing, grinding the surface defects, and rolling to obtain GH4080A alloy wire rod;

[0099] S4, in a nitrogen atmosphere, the GH4080A alloy wire rod was subjected to the first solution treatment in a pit furnace at a temperature of 1150°C and a holding time of 1 h, and then rapidly water-cooled after being taken out of the furnace at a cooling rate of 70°C / s;

[0100] S5, the GH4080A alloy wire rod obtained after water cooling is passed through a wire drawing powder box for cold drawing. Pull to Drawing reduction ratio is 30%;

[0101] S6, in a protective atmosphere of nitrogen and hydrogen, the GH4080A alloy wire rod after cold drawing was subjected to a second solution treatment in a tubular furnace at a temperature of 1150°C and a holding time of 0.5h, with a DV value of 28mm*m / min, and rapid water cooling after being taken out of the furnace, with a cooling rate of 70°C / s;

[0102] S7, cleaning and copper plating the GH4080A alloy wire rod obtained after water cooling;

[0103] S8, immerse the copper-plated wire rod in saponification solution, and then cold draw it. Pull to The cold drawing deformation is 4.3%, and the GH4080A alloy wire rod for cold heading is obtained. The performance test results are shown in Table 1.

[0104] Example 7

[0105] The preparation method of GH4080A alloy wire rod for cold heading provided in this embodiment comprises the following steps:

[0106] S1, according to the chemical composition requirements, the raw materials are smelted in a vacuum induction furnace in a steel plant, and then the materials are purified through an electroslag remelting process to obtain a GH4080A alloy material ingot for cold heading; wherein, the chemical composition of the GH4080A alloy material ingot for cold heading is, by mass percentage, C: 0.06%, Si: 0.10%, Mn: 0.01%, P: 0.002%, S: 0.001%, Cr: 19.58%, Co: 0.01%, Cu: 0.01%, Fe: 0.73%, Al: 1.61%, B: 0.0035%, Ti: 2.54%, Zr: 0.05%, and the balance is Ni;

[0107] S2, diffusion annealing the ingot at a temperature of 1190° C. and a holding time of 120 h;

[0108] S3, opening the ingot after diffusion annealing, grinding the surface defects, and rolling to obtain GH4080A alloy wire rod;

[0109] S4, in a nitrogen atmosphere, the GH4080A alloy wire rod was subjected to the first solution treatment in a pit furnace at a temperature of 1060°C and a holding time of 1 h, and then air-cooled after being taken out of the furnace at a cooling rate of 3°C / s;

[0110] S5, the GH4080A alloy wire rod obtained after water cooling is passed through a wire drawing powder box for cold drawing. Pull to Drawing reduction ratio is 30%;

[0111] S6, in a protective atmosphere of nitrogen and hydrogen, the GH4080A alloy wire rod after cold drawing was subjected to a second solution treatment in a tubular furnace at a temperature of 1070°C and a holding time of 0.5 h, with a DV value of 28 mm*m / min, and air-cooled after being taken out of the furnace at a cooling rate of 3°C / s;

[0112] S7, cleaning and copper plating the GH4080A alloy wire rod obtained after water cooling;

[0113] S8, immerse the copper-plated wire rod in saponification solution, and then cold draw it. Pull to The cold drawing deformation is 4.3%, and the GH4080A alloy wire rod for cold heading is obtained. The performance test results are shown in Table 1.

[0114] Example 8

[0115] The preparation method of GH4080A alloy wire rod for cold heading provided in this embodiment comprises the following steps:

[0116] S1, according to the chemical composition requirements, the raw materials are smelted in a vacuum induction furnace in a steel plant, and then the materials are purified through an electroslag remelting process to obtain a GH4080A alloy material ingot for cold heading; wherein, the chemical composition of the GH4080A alloy material ingot for cold heading is, by mass percentage, C: 0.06%, Si: 0.10%, Mn: 0.01%, P: 0.002%, S: 0.001%, Cr: 19.58%, Co: 0.01%, Cu: 0.01%, Fe: 0.73%, Al: 1.61%, B: 0.0035%, Ti: 2.54%, Zr: 0.05%, and the balance is Ni;

[0117] S2, diffusion annealing the ingot at a temperature of 1190° C. and a holding time of 120 h;

[0118] S3, opening the ingot after diffusion annealing, grinding the surface defects, and rolling to obtain GH4080A alloy wire rod;

[0119] S4, in a nitrogen atmosphere, the GH4080A alloy wire rod was subjected to the first solution treatment in a pit furnace at a temperature of 1060°C and a holding time of 1 h, and then rapidly water-cooled after being taken out of the furnace at a cooling rate of 70°C / s;

[0120] S5, the GH4080A alloy wire rod obtained after water cooling is passed through a wire drawing powder box for cold drawing. Pull to Drawing reduction ratio is 15%;

[0121] S6, in a protective atmosphere of nitrogen and hydrogen, the GH4080A alloy wire rod after cold drawing was subjected to a second solution treatment in a tubular furnace at a temperature of 1070°C and a holding time of 0.5h, with a DV value of 28mm*m / min, and rapid water cooling after being taken out of the furnace, with a cooling rate of 70°C / s;

[0122] S7, cleaning and copper plating the GH4080A alloy wire rod obtained after water cooling;

[0123] S8, immerse the copper-plated wire rod in saponification solution, and then cold draw it. Pull to The cold drawing deformation is 4.3%, and the GH4080A alloy wire rod for cold heading is obtained. The performance test results are shown in Table 1.

[0124] Example 9

[0125] The preparation method of GH4080A alloy wire rod for cold heading provided in this embodiment comprises the following steps:

[0126] S1, according to the chemical composition requirements, the raw materials are smelted in a vacuum induction furnace in a steel plant, and then the materials are purified through an electroslag remelting process to obtain a GH4080A alloy material ingot for cold heading; wherein, the chemical composition of the GH4080A alloy material ingot for cold heading is, by mass percentage, C: 0.06%, Si: 0.10%, Mn: 0.01%, P: 0.002%, S: 0.001%, Cr: 19.58%, Co: 0.01%, Cu: 0.01%, Fe: 0.73%, Al: 1.61%, B: 0.0035%, Ti: 2.54%, Zr: 0.05%, and the balance is Ni;

[0127] S2, diffusion annealing the ingot at a temperature of 1190° C. and a holding time of 120 h;

[0128] S3, opening the ingot after diffusion annealing, grinding the surface defects, and rolling to obtain GH4080A alloy wire rod;

[0129] S4, in a nitrogen atmosphere, the GH4080A alloy wire rod was subjected to the first solution treatment in a pit furnace at a temperature of 1060°C and a holding time of 1 h, and then rapidly water-cooled after being taken out of the furnace at a cooling rate of 70°C / s;

[0130] S5, the GH4080A alloy wire rod obtained after water cooling is passed through a wire drawing powder box for cold drawing. Pull to Drawing reduction ratio is 40%;

[0131] S6, in a protective atmosphere of nitrogen and hydrogen, the GH4080A alloy wire rod after cold drawing was subjected to a second solution treatment in a tubular furnace at a temperature of 1070°C and a holding time of 0.5h, with a DV value of 28mm*m / min, and rapid water cooling after being taken out of the furnace, with a cooling rate of 70°C / s;

[0132] S7, cleaning and copper plating the GH4080A alloy wire rod obtained after water cooling;

[0133] S8, immerse the copper-plated wire rod in saponification solution, and then cold draw it. Pull to The cold drawing deformation is 4.3%, and the GH4080A alloy wire rod for cold heading is obtained. The performance test results are shown in Table 1.

[0134] Example 10

[0135] The preparation method of GH4080A alloy wire rod for cold heading provided in this embodiment comprises the following steps:

[0136] S1, according to the chemical composition requirements, the raw materials are smelted in a vacuum induction furnace in a steel plant, and then the materials are purified through an electroslag remelting process to obtain a GH4080A alloy material ingot for cold heading; wherein, the chemical composition of the GH4080A alloy material ingot for cold heading is, by mass percentage, C: 0.06%, Si: 0.10%, Mn: 0.01%, P: 0.002%, S: 0.001%, Cr: 19.58%, Co: 0.01%, Cu: 0.01%, Fe: 0.73%, Al: 1.61%, B: 0.0035%, Ti: 2.54%, Zr: 0.05%, and the balance is Ni;

[0137] S2, diffusion annealing the ingot at a temperature of 1190° C. and a holding time of 120 h;

[0138] S3, opening the ingot after diffusion annealing, grinding the surface defects, and rolling to obtain GH4080A alloy wire rod;

[0139] S4, in a nitrogen atmosphere, the GH4080A alloy wire rod was subjected to the first solution treatment in a pit furnace at a temperature of 1060°C and a holding time of 1 h, and then rapidly water-cooled after being taken out of the furnace at a cooling rate of 70°C / s;

[0140] S5, the GH4080A alloy wire rod obtained after water cooling is passed through a wire drawing powder box for cold drawing. Pull to Drawing reduction ratio is 30%;

[0141] S6, in a protective atmosphere of nitrogen and hydrogen, the GH4080A alloy wire rod after cold drawing was subjected to a second solution treatment in a tubular furnace at a temperature of 1070°C and a holding time of 0.5h, with a DV value of 20mm*m / min, and rapid water cooling after being taken out of the furnace, with a cooling rate of 70°C / s;

[0142] S7, cleaning and copper plating the GH4080A alloy wire rod obtained after water cooling;

[0143] S8, immerse the copper-plated wire rod in saponification solution, and then cold draw it. Pull to The cold drawing deformation is 4.3%, and the GH4080A alloy wire rod for cold heading is obtained. The performance test results are shown in Table 1.

[0144] Embodiment 11

[0145] The preparation method of GH4080A alloy wire rod for cold heading provided in this embodiment comprises the following steps:

[0146] S1, according to the chemical composition requirements, the raw materials are smelted in a vacuum induction furnace in a steel plant, and then the materials are purified through an electroslag remelting process to obtain a GH4080A alloy material ingot for cold heading; wherein, the chemical composition of the GH4080A alloy material ingot for cold heading is, by mass percentage, C: 0.06%, Si: 0.10%, Mn: 0.01%, P: 0.002%, S: 0.001%, Cr: 19.58%, Co: 0.01%, Cu: 0.01%, Fe: 0.73%, Al: 1.61%, B: 0.0035%, Ti: 2.54%, Zr: 0.05%, and the balance is Ni;

[0147] S2, diffusion annealing the ingot at a temperature of 1190° C. and a holding time of 120 h;

[0148] S3, opening the ingot after diffusion annealing, grinding the surface defects, and rolling to obtain GH4080A alloy wire rod;

[0149] S4, in a nitrogen atmosphere, the GH4080A alloy wire rod was subjected to the first solution treatment in a pit furnace at a temperature of 1060°C and a holding time of 1 h, and then rapidly water-cooled after being taken out of the furnace at a cooling rate of 70°C / s;

[0150] S5, the GH4080A alloy wire rod obtained after water cooling is passed through a wire drawing powder box for cold drawing. Pull to Drawing reduction ratio is 30%;

[0151] S6, in a protective atmosphere of nitrogen and hydrogen, the GH4080A alloy wire rod after cold drawing was subjected to a second solution treatment in a tubular furnace at a temperature of 1070°C and a holding time of 0.5h, with a DV value of 40mm*m / min, and rapid water cooling after being taken out of the furnace, with a cooling rate of 70°C / s;

[0152] S7, cleaning and copper plating the GH4080A alloy wire rod obtained after water cooling;

[0153] S8, immerse the copper-plated wire rod in saponification solution, and then cold draw it. Pull to The cold drawing deformation is 4.3%, and the GH4080A alloy wire rod for cold heading is obtained. The performance test results are shown in Table 1.

[0154] Example 12

[0155] The preparation method of GH4080A alloy wire rod for cold heading provided in this embodiment comprises the following steps:

[0156] S1, according to the chemical composition requirements, the raw materials are smelted in a vacuum induction furnace in a steel plant, and then the materials are purified through an electroslag remelting process to obtain a GH4080A alloy material ingot for cold heading; wherein, the chemical composition of the GH4080A alloy material ingot for cold heading is, by mass percentage, C: 0.06%, Si: 0.10%, Mn: 0.01%, P: 0.002%, S: 0.001%, Cr: 19.58%, Co: 0.01%, Cu: 0.01%, Fe: 0.73%, Al: 1.61%, B: 0.0035%, Ti: 2.54%, Zr: 0.05%, and the balance is Ni;

[0157] S2, diffusion annealing the ingot at a temperature of 1190° C. and a holding time of 120 h;

[0158] S3, opening the ingot after diffusion annealing, grinding the surface defects, and rolling to obtain GH4080A alloy wire rod;

[0159] S4, in a nitrogen atmosphere, the GH4080A alloy wire rod was subjected to the first solution treatment in a pit furnace at a temperature of 1060°C and a holding time of 1 h, and then rapidly water-cooled after being taken out of the furnace at a cooling rate of 70°C / s;

[0160] S5, the GH4080A alloy wire rod obtained after water cooling is passed through a wire drawing powder box for cold drawing. Pull to Drawing reduction ratio is 30%;

[0161] S6, in a protective atmosphere of nitrogen and hydrogen, the GH4080A alloy wire rod after cold drawing was subjected to a second solution treatment in a tubular furnace at a temperature of 1070°C and a holding time of 0.5h, with a DV value of 28mm*m / min, and rapid water cooling after being taken out of the furnace, with a cooling rate of 70°C / s;

[0162] S7, cleaning and copper plating the GH4080A alloy wire rod obtained after water cooling;

[0163] S8, immerse the copper-plated wire rod in saponification solution, and then cold draw it. Pull to The cold drawing deformation amount is 7%, and the GH4080A alloy wire rod for cold heading is obtained. The performance test results are shown in Table 1.

[0164] Comparative Example 1

[0165] The preparation method of GH4080A alloy wire rod for cold heading provided in this embodiment comprises the following steps:

[0166] S1, according to the chemical composition requirements, the raw materials are smelted in a vacuum induction furnace in a steel plant, and then the materials are purified through an electroslag remelting process to obtain a GH4080A alloy material ingot for cold heading; wherein, by mass percentage, the chemical composition of the GH4080A alloy material ingot for cold heading is: C: 0.06%, Si: 0.10%, Mn: 0.01%, P: 0.002%, S: 0.001%, Cr: 19.58%, Co: 0.01%, Cu: 0.01%, Fe: 0.73%, Al: 1.61%, B: 0.0035%, Ti: 2.54%, and the balance is Ni;

[0167] S2, diffusion annealing the ingot at a temperature of 1190° C. and a holding time of 120 h;

[0168] S3, opening the ingot after diffusion annealing, grinding the surface defects, and rolling to obtain GH4080A alloy wire rod;

[0169] S4, in a nitrogen atmosphere, the GH4080A alloy wire rod was subjected to the first solution treatment in a pit furnace at a temperature of 1060°C and a holding time of 1 h, and then rapidly water-cooled after being taken out of the furnace at a cooling rate of 70°C / s;

[0170] S5, the GH4080A alloy wire rod obtained after water cooling is passed through a wire drawing powder box for cold drawing. Pull to Drawing reduction ratio is 30%;

[0171] S6, in a protective atmosphere of nitrogen and hydrogen, the GH4080A alloy wire rod after cold drawing was subjected to a second solution treatment in a tubular furnace at a temperature of 1070°C and a holding time of 0.5h, with a DV value of 28mm*m / min, and rapid water cooling after being taken out of the furnace, with a cooling rate of 70°C / s;

[0172] S7, cleaning and copper plating the GH4080A alloy wire rod obtained after water cooling;

[0173] S8, immerse the copper-plated wire rod in saponification solution, and then cold draw it. Pull to The cold drawing deformation is 4.3%, and the GH4080A alloy wire rod for cold heading is obtained. The performance test results are shown in Table 1.

[0174] Comparative Example 2

[0175] The preparation method of GH4080A alloy wire rod for cold heading provided in this embodiment comprises the following steps:

[0176] S1, according to the chemical composition requirements, the raw materials are smelted in a vacuum induction furnace in a steel plant, and then the materials are purified through an electroslag remelting process to obtain a GH4080A alloy material ingot for cold heading; wherein, by mass percentage, the chemical composition of the GH4080A alloy material ingot for cold heading is: C: 0.06%, Si: 0.10%, Mn: 0.01%, P: 0.002%, S: 0.001%, Cr: 19.58%, Co: 0.01%, Cu: 0.01%, Fe: 0.73%, Al: 1.61%, B: 0.0035%, Ti: 2.54%, Zr: 0.25%, and the balance is Ni;

[0177] S2, diffusion annealing the ingot at a temperature of 1190° C. and a holding time of 120 h;

[0178] S3, opening the ingot after diffusion annealing, grinding the surface defects, and rolling to obtain GH4080A alloy wire rod;

[0179] S4, in a nitrogen atmosphere, the GH4080A alloy wire rod was subjected to the first solution treatment in a pit furnace at a temperature of 1060°C and a holding time of 1 h, and then rapidly water-cooled after being taken out of the furnace at a cooling rate of 70°C / s;

[0180] S5, the GH4080A alloy wire rod obtained after water cooling is passed through a wire drawing powder box for cold drawing. Pull to Drawing reduction ratio is 30%;

[0181] S6, in a protective atmosphere of nitrogen and hydrogen, the GH4080A alloy wire rod after cold drawing was subjected to a second solution treatment in a tubular furnace at a temperature of 1070°C and a holding time of 0.5h, with a DV value of 28mm*m / min, and rapid water cooling after being taken out of the furnace, with a cooling rate of 70°C / s;

[0182] S7, cleaning and copper plating the GH4080A alloy wire rod obtained after water cooling;

[0183] S8, immerse the copper-plated wire rod in saponification solution, and then cold draw it. Pull to The cold drawing deformation is 4.3%, and the GH4080A alloy wire rod for cold heading is obtained. The performance test results are shown in Table 1.

[0184] For the hardness test conditions and test methods in Table 1, please refer to "GB / T 231.1-2018 Metallic Materials-Brinell Hardness Test-Part 1: Test Method", and for the test conditions and test methods of tensile strength, yield strength, elongation after fracture and reduction of area, please refer to "GB / T 228.1-2021 Metallic Materials-Tensile Test-Part 1: Room Temperature Test Method".

[0185] Table 1 Performance test results of alloy wire rods prepared in Examples and Comparative Examples

[0186]

[0187]

[0188] The alloy wire rods prepared in the embodiments and comparative examples were made into bolts by cold heading process, and after aging air cooling treatment at 700°C*16h, the properties of the cold headed high temperature resistant bolts were tested, and the results are shown in Table 2. The test conditions and test methods of tensile strength, yield strength, elongation after fracture, and reduction of area in Table 2 refer to "GB / T 228.1-2021 Metallic materials-Tensile test-Part 1: Room temperature test method", and the test conditions and test methods of 800°C tensile strength refer to "GB / T 228.2-2015 Metallic materials-Tensile test-Part 2: High temperature test method".

[0189] Table 2 Performance test results of cold-headed high temperature resistant bolts prepared in the embodiments and comparative examples

[0190]

[0191]

[0192] It can be seen from the performance test results of the embodiments and comparative examples in Table 1 and Table 2 that:

[0193] The technical effects of Examples 1-3 are relatively optimal. The hardness of the prepared GH4080A alloy wire rod for cold heading is ≤180HBW, the tensile strength is ≤900MPa, the material has excellent plasticity, good forming performance, and excellent cold heading performance. The room temperature tensile strength of the cold heading high temperature resistant bolts prepared using the alloy wire rod is ≥1200MPa, the tensile strength at 800℃ is ≥600MPa, the material has excellent plasticity, good forming performance, and excellent high temperature resistance.

[0194] Compared with Example 1: In Example 4, due to the high annealing temperature, the plasticity of the material is reduced. In Example 5, due to the low solid solution temperature and insufficient solid solution, the hardness of the alloy wire rod obtained is relatively high and the forming performance is poor. In Example 6, due to the high solid solution temperature, the grains are coarse, the material plasticity is poor, and the strength is also low. In Example 7, due to the low cooling rate after solid solution, the hardness of the alloy wire rod obtained is very high and the forming performance is very poor. In Example 8, due to the small drawing amount and mixed grains, the plasticity of the material is reduced. In Example 9, due to the excessive drawing amount, the material breaks, and the subsequent bolt forming cannot be carried out. In Example 10, due to the small DV value, long solid solution time, coarse grains, poor material plasticity, and low strength. In Example 11, due to the large DV value, short solid solution time, and insufficient solid solution, the hardness of the alloy wire rod obtained is relatively high and the forming performance is poor. In Example 12, due to the large cold drawing deformation, the hardness of the alloy wire rod obtained is relatively high and the forming performance is poor.

[0195] Compared with Example 1: Comparative Example 1 does not contain Zr element, so the material plasticity and molding performance are poor. Comparative Example 2 has too high Zr content, so the material plasticity and molding performance are greatly reduced.

[0196] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments / methods or examples. In addition, those skilled in the art may combine and combine the different embodiments / methods or examples described in this specification and the features of the different embodiments / methods or examples, unless they are contradictory.

[0197] It should be noted that, in the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the sentence "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. In the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically stipulated.

[0198] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A GH4080A alloy material for cold heading, characterized in that: Measured by mass percentage, the chemical composition of the GH4080A alloy material for cold heading is: C: 0.04%-0.10%, Si≤0.80%, Mn≤0.40%, P≤0.020%, S≤0.015%, Cr: 18.0%-21.0%, Co≤2.0%, Cu≤0.2%, Fe≤1.5%, Al: 1.0%-1.8%, B≤0.008%, Ti: 1.8%-2.7%, Zr: 0.01%-0.20%, and the balance is Ni.

2. A GH4080A alloy wire rod for cold heading, which is prepared using the GH4080A alloy material for cold heading according to claim 1.

3. A method for preparing GH4080A alloy wire rod for cold heading, characterized in that: The method comprises the following steps: According to the requirements of chemical composition, the raw materials are smelted to obtain a GH4080A alloy material ingot for cold heading; wherein, in terms of mass percentage, the chemical composition of the GH4080A alloy material ingot for cold heading is: C: 0.04%-0.10%, Si≤0.80%, Mn≤0.40%, P≤0.020%, S≤0.015%, Cr: 18.0%-21.0%, Co≤2.0%, Cu≤0.2%, Fe≤1.5%, Al: 1.0%-1.8%, B≤0.008%, Ti: 1.8%-2.7%, Zr: 0.01%-0.20%, and the balance is Ni; The ingot is subjected to diffusion annealing, blanking and rolling treatment to obtain GH4080A alloy wire rod; The GH4080A alloy wire rod is subjected to a first solid solution treatment, drawing, a second solid solution treatment and a post-treatment to obtain the GH4080A alloy wire rod for cold heading.

4. The preparation method according to claim 3, characterized in that: The diffusion annealing is performed at a temperature of 1100-1200° C. and the holding time is 100-150 hours.

5. The preparation method according to claim 3, characterized in that: The temperature of the first solution treatment is 1000-1100° C., and the holding time is 0.5-1 h.

6. The preparation method according to claim 3, characterized in that: The preparation method further comprises: performing a rapid cooling treatment after the first solution treatment and before the drawing treatment, with a cooling rate of ≥10°C / s; After the second solution treatment and before the post-treatment, a rapid cooling treatment is performed with a cooling rate of ≥10°C / s.

7. The preparation method according to claim 3, characterized in that: In the drawing process, the drawing reduction ratio is controlled to be 20%-35%.

8. The preparation method according to claim 3, characterized in that: The temperature of the second solution treatment is 1000-1100° C., and the DV value is 25-35 mm*m / min.

9. The preparation method according to claim 3, characterized in that: The hardness of the GH4080A alloy wire rod for cold heading is ≤180 HBW.

10. Use of the GH4080A alloy material for cold heading according to claim 1, the GH4080A alloy wire rod for cold heading according to claim 2, or the GH4080A alloy wire rod for cold heading prepared by the method according to any one of claims 3 to 9 in cold heading forming of high temperature resistant fasteners.

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