Heat treatment method for GH4169 high-temperature alloy wire after cold deformation

A technology of GH4169 and high-temperature alloy wire, which is applied in the field of high-temperature alloy wire preparation, can solve the problems of low pass rate, unstable performance, immature cold processing technology of GH4169 alloy, etc., and achieve the goal of inhibiting grain growth and strengthening grain boundaries Effect

Inactive Publication Date: 2021-04-02
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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Problems solved by technology

At present, cold deformation technology is mainly used in the manufacturing field of GH4169 alloy wire for fasteners and spring wire, while the performance of domestic GH4169 alloy wire products is unstable, and the pass rate is very low
In order to achieve different strength, fatigue, creep and other requirements, the key is to control the cold deformation process of the GH4169 alloy wire. The amount of cold deformation and the heat treatment during the cold deformation process are the keys to controlling the structure and properties of the alloy. GH4169 alloy has not yet systematically studied the intermediate heat treatment after cold deformation, resulting in the immature cold processing technology of GH4169 alloy

Method used

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  • Heat treatment method for GH4169 high-temperature alloy wire after cold deformation
  • Heat treatment method for GH4169 high-temperature alloy wire after cold deformation

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Experimental program
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Effect test

specific Embodiment 1

[0019] Step 1: Obtain the cold-drawn state wire material of the GH4169 superalloy wire material by a cold-drawing method, and the cold-drawing deformation amount thereof is 40%.

[0020] Step 2. Place the cold-drawn wire material obtained in step 1 in a segmented vacuum heat treatment furnace for solution heat treatment, keep it at 1020°C for 20 minutes, then cool it down to 960°C at a cooling rate of 20°C / min, and keep it warm for 60 minutes ; and then filled with argon for air cooling; and during the solution heat treatment process, the vacuum degree -3 Pa.

[0021] The microstructure of the alloy wire obtained after heat treatment is shown in figure 1 As shown, the alloy structure is uniform, recrystallized after deformation, and the precipitate phase is precipitated along the grain boundary, and the grain size is 8 grades. It meets the microstructure and performance requirements of GH4169 alloy for aerospace fasteners and spring wires.

specific Embodiment 2

[0023] Step 1: Obtain the cold-drawn state wire material of the GH4169 superalloy wire material by cold swaging method, and the deformation amount of the cold swaging method is 34%.

[0024] Step 2. Put the cold-drawn wire obtained in step 1 into a segmented vacuum heat treatment furnace for solution heat treatment, keep it at 1000°C for 10 minutes, then cool it down to 960°C at a cooling rate of 20°C / min, and keep it warm for 60 minutes , filled with argon for air cooling; and during the solution heat treatment process, the vacuum degree is -3 Pa.

[0025] The microstructure of the alloy wire obtained after heat treatment is shown in figure 2 As shown, the alloy structure is uniform, and it is a recrystallized structure after deformation. The precipitate phase precipitates along the grain boundary, and the grain size is 7 grades. It meets the microstructure and performance requirements of GH4169 alloy for aerospace fasteners and spring wires.

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Abstract

The invention discloses a heat treatment method for a GH4169 high-temperature alloy wire after cold deformation, belongs to the technical field of high-temperature alloy wire preparation, and providesan intermediate heat treatment method for the GH4169 high-temperature alloy wire after cold deformation, wherein the method realizes optimal control of cold drawing deformation and a heat treatment process. The method specifically comprises the following steps of carrying out solid solution heat treatment on an obtained cold-drawn wire, and carrying out heat preservation at 1000-1020 DEG C for 5-20 minutes; cooling to 960 DEG C at a cooling rate of 20 DEG C/min, and keeping the temperature for 60 minutes; finally, filling argon for air cooling; and enabling the vacuum degree to be less than 10<-3>Pa in the solid solution heat treatment process. By means of the method, the cold-drawn wire is obtained, ideal recrystallized grains and precipitated phase structures are obtained according to the optimal control over the cold-drawn deformation and the corresponding heat treatment temperature, precipitated phases are separated out along grain boundaries, the effects of inhibiting grain growth and strengthening the grain boundaries are achieved, and the structure performance requirements of GH4169 alloy wires for aerospace fasteners and spring wires are met.

Description

technical field [0001] The invention relates to the technical field of high-temperature alloy wire preparation, in particular to a heat treatment method for GH4169 high-temperature alloy wire after cold deformation. Background technique [0002] GH4169 superalloy has high tensile strength, durability, good corrosion resistance, high temperature oxidation resistance, thermal processing and welding properties, and has been widely used as important structural materials in aerospace and other fields. At present, cold deformation technology is mainly used in the manufacturing field of GH4169 alloy wire for fasteners and spring wire, while the performance of domestic GH4169 alloy wire products is unstable, and the pass rate is very low. In order to achieve different strength, fatigue, creep and other requirements, the key is to control the cold deformation process of the GH4169 alloy wire. The amount of cold deformation and the heat treatment during the cold deformation process ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/10C22F1/02
CPCC22F1/02C22F1/10
Inventor 付建辉周扬肖东平赖宇
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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