阅读说明：本技术 一种gh4099高温合金丝材的冷加工方法 (Cold machining method of GH4099 high-temperature alloy wire ) 是由 付建辉 周扬 陈琦 肖东平 于 2020-12-03 设计创作，主要内容包括：本发明公开了一种GH4099高温合金丝材的冷加工方法,属于及高温合金丝材制备技术领域,提供一种可提高丝材表面质量的一种GH4099高温合金丝材的冷加工方法；其包括：A、固溶热处理；B、中间坯旋锻减径处理：对步骤A得到的棒材采用镟锻工艺进行多道次退火旋锻减径处理,各道次旋锻变形量控制在30％～45％之间；并且在每道次旋锻减径处理后采用真空热处理炉进行退火处理,真空度＜10～(-3)Pa,退火温度为1050℃～1100℃,保温时间10min～30min；C、制得成品。本发明所制备的丝材产品的组织均匀分布,无粗晶组织；丝材表面无裂纹、麻坑等缺陷,具有尺寸精度高,表面质量优等特点。(The invention discloses a cold working method of a GH4099 high-temperature alloy wire, belongs to the technical field of high-temperature alloy wire preparation, and provides a cold working method of a GH4099 high-temperature alloy wire, which can improve the surface quality of the wire; it includes: A. solution heat treatment; B. and (3) rotary swaging and reducing the intermediate billet: b, performing multi-pass annealing and rotary swaging and reducing treatment on the bar obtained in the step A by adopting a rotary swaging process, wherein the rotary swaging deformation of each pass is controlled to be 30-45%; and annealing treatment is carried out by adopting a vacuum heat treatment furnace after each pass of rotary swaging and reducing treatment, wherein the vacuum degree is less than 10 ‑3 Pa, annealing temperature is 1050-1100 ℃, and heat preservation time is 10-30 min; C. and (5) preparing a finished product. Groups of wire products prepared according to the inventionThe fiber is evenly distributed without coarse-grained structure; the surface of the wire has no defects of cracks, pits and the like, and has the characteristics of high dimensional precision, excellent surface quality and the like.)

1. A cold processing method of GH4099 high-temperature alloy wire is characterized by comprising the following steps: the method comprises the following steps:

A. solution heat treatment: carrying out solution heat treatment on GH4099 bars with the diameter of phi 8-phi 10mm under the protection of protective gas, wherein the temperature of the solution heat treatment is 1130-1150 ℃, and the heat preservation time is 60 min; air cooling the bar subjected to the solution heat treatment;

B. and (3) rotary swaging and reducing the intermediate billet: b, performing multi-pass annealing and rotary swaging and reducing treatment on the bar obtained in the step A by adopting a rotary swaging process, wherein the rotary swaging deformation of each pass is controlled to be 30-45%; and annealing treatment is carried out by adopting a vacuum heat treatment furnace after each pass of rotary swaging and reducing treatment, wherein the vacuum degree is less than 10^-3Pa, annealing temperature is 1050-1100 ℃, and heat preservation time is 10-30 min;

C. preparing a finished product: and C, performing final-pass rotary swaging and reducing treatment on the bar material obtained in the step B, wherein the deformation amount of the final-pass rotary swaging and reducing treatment is controlled to be between 10 and 25 percent, and thus obtaining a finished product.

2. The method for cold working a GH4099 superalloy wire of claim 1, wherein: and in the step B, cooling by adopting an argon filling mode during annealing and cooling.

3. The method for cold working a GH4099 superalloy wire of claim 1, wherein: in step A, the protective gas used is inert gas or nitrogen.

4. A method of cold working a GH4099 superalloy wire of any of claims 1 to 3, wherein: in step B, four-pass annealing, rotary swaging and reducing treatment is performed.

Technical Field

The invention relates to the technical field of preparation of high-temperature alloy wires, in particular to a cold machining method of a GH4099 high-temperature alloy wire.

Background

GH4099 is a typical aging strengthening type nickel-based high-temperature alloy, which has excellent comprehensive mechanical properties, can reach about 1000 ℃ in use, and is an aging nickel-based high-temperature alloy with higher use temperature at present.

At present, bar materials with the diameter of 8.00 mm-10.0 mm, which are mainly obtained by rolling, are used as raw materials for preparing GH4099 high-temperature alloy wire materials, a fixed die is used for reducing and drawing, and an intermediate solution heat treatment process is matched. However, when the fixed die is used for drawing, in order to ensure the service life of the reducing die and smooth drawing of the wire, the mixed type substance of the solid powder and the granular substance is used as a lubricant for lubrication in the production process, and due to the shape of the granular substance, the surface of the wire is often damaged when the wire is in contact with and extruded by the wire, so that the higher reject ratio is caused, the production cost of an enterprise is increased, and the economic benefit is influenced.

Based on the above situation, it is necessary to develop a cold working method research of GH4099 high temperature alloy wire with good surface quality, improve the yield of wire products, reduce the cost, reduce the pollution to the environment, and realize stable and batch production.

Disclosure of Invention

The invention aims to provide a cold processing method of GH4099 high-temperature alloy wire, which can improve the surface quality of the wire.

The technical scheme adopted by the invention for solving the technical problems is as follows: a cold working method of GH4099 high temperature alloy wire comprises the following steps:

A. solution heat treatment: carrying out solution heat treatment on GH4099 bars with the diameter of phi 8-phi 10mm under the protection of protective gas, wherein the temperature of the solution heat treatment is 1130-1150 ℃, and the heat preservation time is 60 min; air cooling the bar subjected to the solution heat treatment;

B. and (3) rotary swaging and reducing the intermediate billet: b, performing multi-pass annealing and rotary swaging and reducing treatment on the bar obtained in the step A by adopting a rotary swaging process, wherein the rotary swaging deformation of each pass is controlled to be 30-45%; and annealing treatment is carried out by adopting a vacuum heat treatment furnace after each pass of rotary swaging and reducing treatment, wherein the vacuum degree is less than 10^-3Pa, annealing temperature is 1050-1100 ℃, and heat preservation time is 10-30 min;

C. preparing a finished product: and C, performing final-pass rotary swaging and reducing treatment on the bar material obtained in the step B, wherein the deformation amount of the final-pass rotary swaging and reducing treatment is controlled to be between 10 and 25 percent, and thus obtaining a finished product.

Further, the method comprises the following steps: and in the step B, cooling by adopting an argon filling mode during annealing and cooling.

Further, the method comprises the following steps: in step A, the protective gas used is inert gas or nitrogen.

Further, the method comprises the following steps: in step B, four-pass annealing, rotary swaging and reducing treatment is performed.

The invention has the beneficial effects that: the method adopts a treatment method of vacuum annealing and rotary swaging process of a rotary swaging machine, and can effectively reduce uneven deformation by controlling the deformation amount and the annealing temperature of each pass of rotary section, thereby obtaining uniformly distributed recrystallization texture. The tissue of the wire product prepared by the invention is uniformly distributed, and no coarse-grain tissue exists; the surface of the wire has no defects of cracks, pits and the like, and has the characteristics of high dimensional precision, excellent surface quality and the like.

Drawings

FIG. 1 is a schematic view of the structure of a wire prepared in example one;

FIG. 2 is a schematic view of the structure of the wire prepared in example two;

Detailed Description

The invention is further described with reference to the following figures and detailed description.

It should be noted that, if there are directional indication terms, such as the terms of direction and orientation, above, below, left, right, front and back, in the present invention, for facilitating the description of the relative positional relationship between the components, the absolute position that is not the positional relationship between the related components and the components is specifically referred to, and is only used for explaining the relative positional relationship and the motion situation between the components in a specific posture, and if the specific posture is changed, the directional indication is changed accordingly. When the present invention relates to a number, such as "a plurality", "several", etc., two or more than two are specifically referred to.

The invention discloses a cold working method of a GH4099 high-temperature alloy wire, which comprises the following steps:

A. solution heat treatment: carrying out solution heat treatment on GH4099 bars with the diameter of phi 8-phi 10mm under the protection of protective gas, wherein the temperature of the solution heat treatment is 1130-1150 ℃, and the heat preservation time is 60 min; air cooling the bar subjected to the solution heat treatment; the protective gas can be inert gas or nitrogen, so that the bar is in a protective atmosphere environment in the solid solution heat treatment process, and the material denaturation is avoided.

B. And (3) rotary swaging and reducing the intermediate billet: b, performing multi-pass annealing and rotary swaging and reducing treatment on the bar obtained in the step A by adopting a rotary swaging process, wherein the rotary swaging deformation of each pass is controlled to be 30-45%; and annealing treatment is carried out by adopting a vacuum heat treatment furnace after each pass of rotary swaging and reducing treatment, wherein the vacuum degree is less than 10^-3Pa, annealing temperature is 1050-1100 ℃, and heat preservation time is 10-30 min; in the invention, the specific number of the rotary section passes of the rotary section process can be reasonably set in combination with the relation between the diameter of the wire to be obtained and the initial diameter, and the number of the rotary section passes can be set to be 3-5 times in the rotary forging and reducing treatment of the intermediate blank in the step B under the normal condition; and may be set to four times as a specific example.

C. Preparing a finished product: and C, performing final-pass rotary swaging and reducing treatment on the bar material obtained in the step B, wherein the deformation amount of the final-pass rotary swaging and reducing treatment is controlled to be between 10 and 25 percent, and thus obtaining a finished product.

According to the invention, by controlling the deformation amount and the annealing temperature of each pass of the rotary section, the uneven deformation can be effectively reduced, and then the uniformly distributed recrystallization texture can be obtained.

Detailed description of the preferred embodiment

A1, putting hot rolled bars with the diameter of 10mm in a heat treatment furnace with protective atmosphere for solution heat treatment; the temperature of the solid solution heat treatment is 1150 ℃, and the heat preservation time of the solid solution heat treatment is 60 min; air cooling the bar subjected to the solution heat treatment;

b1, sequentially subjecting the phi 10mm bar material subjected to the solution heat treatment in the step A1 to four-pass rotary swaging diameter reduction treatment of phi 10mm → phi 7.8mm (deformation 39%) → phi 6.5mm (deformation 31%) → phi 5.3mm (deformation 36%) → phi 4.3mm (deformation 34%) by using a rotary swaging machine, and performing vacuum annealing treatment by using a vacuum heat treatment furnace after each pass of diameter reduction, wherein the vacuum degree is less than 10^-3Pa, the annealing temperature is 1050 ℃, the heat preservation time is 30min, and the annealing and cooling are carried out by adopting an argon filling mode;

c1, performing final-pass rotary swaging and diameter reducing treatment on the annealed wire rod with the diameter of 4.3mm prepared in the step B1 to obtain the wire rod with the diameter of 4mm (the deformation is 18 percent).

The prepared GH4099 wire with the diameter phi of 4mm has the dimensional tolerance of about 0-0.03 mm, good surface quality, no defect and uniform tissue distribution, and the specific tissue is shown in figure 1.

Detailed description of the invention

A2, putting hot rolled bars with the diameter of phi 8mm into a heat treatment furnace in protective atmosphere for solution heat treatment; the temperature of the solution treatment is 1130 ℃, and the heat preservation time of the solution treatment is 60 min;

b2, performing four-pass rotary swaging and diameter reducing treatment on the 8 mm-diameter bar material subjected to the solution treatment in the step A2 by using a rotary swaging machine, wherein the four-pass rotary swaging and diameter reducing treatment is performed in four passes of 8mm → 6.3mm (deformation amount 38%) → 5.0mm (deformation amount 37%) → 4.0mm (deformation amount 36%) → 3.2mm (deformation amount 36%), and after each pass of diameter reduction, performing vacuum annealing treatment by using a vacuum heat treatment furnace, wherein the vacuum degree is less than 10^-3Pa, the annealing temperature is 1050 ℃, the heat preservation time is 30min, and the annealing and cooling are carried out by adopting an argon filling mode;

c2, performing final-pass rotary swaging and diameter reducing treatment on the annealed wire rod with the diameter of 3.2mm prepared in the step B2 to the diameter of 3mm (deformation amount of 12%) to prepare the wire rod with the diameter of 3 mm.

The prepared GH4099 wire with the diameter phi of 3mm has the dimensional tolerance of about 0-0.03 mm, good surface quality, no defect and uniform tissue distribution, and is shown in a tissue chart 2.