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GH4282 nickel-based high-temperature alloy bar and preparation method thereof

A nickel-based superalloy, GH4282 technology, applied in the field of metal materials, can solve the problems of restricting product quality, coarse grains, and poor uniformity, and achieve the effect of improving the uniformity of structure and performance, uniform grain structure, and avoiding coarse grains

Active Publication Date: 2020-05-08
BEIJING CISRI GAONA TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a new type of alloy, GH4282 alloy rods produced by traditional processes in China generally have coarse grains and poor uniformity, which restricts the further improvement of product quality, thus limiting the promotion and application of GH4282 alloy products

Method used

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  • GH4282 nickel-based high-temperature alloy bar and preparation method thereof
  • GH4282 nickel-based high-temperature alloy bar and preparation method thereof
  • GH4282 nickel-based high-temperature alloy bar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Prepare the GH4282 superalloy bar of Φ210mm, comprising the following steps:

[0052] S1. The GH4282 nickel-based superalloy ingot of Φ305mm that has been homogenized is compositely wrapped, and then the ingot is loaded in a furnace at a temperature of 650°C, and the temperature is raised to 1160°C at a heating rate of 70°C / h, and the temperature is kept for 3.5h. baked;

[0053] S2. Fire upsetting the ingot after the heat treatment in step S1 in the axial direction. The specific operation is: firstly carry out the first continuous deformation at a constant speed with a deformation amount of 12%, and then stay for 4s, and then deform with a deformation of 28%. The amount of continuous second deformation at a constant speed, the final forging temperature is 1020 ℃;

[0054] Then return the billet to the furnace while it is hot and reheat it to 1160°C, keep it warm for 70 minutes, and take it out of the furnace to obtain the billet;

[0055] Carry out a fire drawing on ...

Embodiment 2

[0066] Prepare the GH4282 superalloy bar of Φ200mm, comprising the following steps:

[0067] S1. Composite sheath the homogenized Φ305mm GH4282 nickel-based superalloy ingot, then put the ingot in the furnace at 650°C, raise the temperature to 1165°C at a heating rate of 65°C / h, keep it for 4 hours, and take it out of the furnace ;

[0068] S2. Fire upsetting the ingot after the heat treatment in step S1 along the axial direction. The specific operation is: firstly carry out the first continuous deformation at a constant speed with a deformation amount of 10%, and then stay for 3s and then deform with 30% The second deformation is carried out at a constant speed, and the final forging temperature is 1000°C;

[0069] Then return the billet to the furnace while it is hot and reheat it to 1165°C, keep it warm for 75 minutes, and then take it out of the furnace to obtain the billet;

[0070] Carry out a fire drawing on the billet perpendicular to the axial direction, the drawing...

Embodiment 3

[0082] Prepare the GH4282 superalloy bar of Φ245mm, comprising the following steps:

[0083] S1. Composite sheath the homogenized Φ305mm GH4282 nickel-based superalloy ingot, then put the ingot in the furnace at 500°C, raise the temperature to 1140°C at a heating rate of 60°C / h, keep it warm for 2 hours, and take it out of the furnace ;

[0084] S2. Fire upsetting the ingot after the heat treatment in step S1 along the axial direction. The specific operation is: firstly carry out the first continuous deformation at a constant speed with a deformation amount of 10%, and then stay for 3s and then deform with 20% The second deformation is carried out at a constant speed, and the final forging temperature is 1000°C;

[0085] Then return the billet to the furnace while it is hot and reheat it to 1140°C, keep it warm for 45 minutes, and then take it out of the furnace to obtain the billet;

[0086]Carry out a fire drawing on the billet perpendicular to the axial direction, the amo...

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Abstract

The invention discloses a GH4282 nickel-based high-temperature alloy bar and a preparation method thereof, and solves the technical problems of coarse grain size and poor uniformity of an existing GH4282 alloy bar. The preparation method comprises the following steps: S1, heating a GH4282 nickel-based high-temperature alloy ingot casting; S2, carrying out primary upsetting and tempering on the ingot casting in the axial direction to obtain a blank, and carrying out primary hot drawing and tempering on the blank in the direction perpendicular to the axial direction; S3, carrying out secondary upsetting and tempering on the blank in the axial direction, and then carrying out secondary hot drawing and tempering in the direction perpendicular to the axial direction; S4, carrying out three-timeupsetting and tempering on the blank in the axial direction, and then carrying out three-time drawing and tempering in the direction perpendicular to the axial direction to obtain a bar blank; and S5, tempering the bar blank in the step S4, and then performing one-fire-diameter forging forming to obtain the GH4282 nickel-based high-temperature alloy bar. The invention further discloses the GH4282nickel-based high-temperature alloy bar prepared by the method. The GH4282 nickel-based high-temperature alloy bar has the advantage that the structure uniformity of the GH4282 nickel-based high-temperature alloy bar can be effectively improved, so that the performance of the GH4282 nickel-based high-temperature alloy bar is improved.

Description

technical field [0001] The invention relates to the technical field of metal materials, more specifically, it relates to a GH4282 nickel-based superalloy rod and a preparation method thereof. Background technique [0002] In the past few decades, solid solution strengthened superalloys have been widely used in high temperature, large thermal stress but small mechanical stress due to their good long-term high temperature stability, surface stability, good machinability and welding performance. working conditions. Among such alloys, nickel-based superalloys are widely used in aero-engines and gas turbines. In order to meet the growing needs of the aviation and energy industry, it is still necessary to rely on the adjustment of chemical composition to improve the performance of the alloy. A new precipitation hardening nickel-based superalloy GH4282 came into being. [0003] The GH4282 alloy forms Ni3(Al,Ti)-type γ′ strengthening phase by adding Al and Ti; adding Cr and Mo for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/10
CPCC22F1/10
Inventor 石照夏颜晓峰段春华赵明汉
Owner BEIJING CISRI GAONA TECH
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