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Method for improving thermoplasticity of GH141 difficult-to-deform high-temperature alloy

A GH141 and superalloy technology, applied in the field of improving the thermoplasticity of GH141 refractory superalloy and GH141 alloy, can solve the problem of poor thermoplasticity of GH141 alloy, eliminate the as-cast dendrite structure, reduce the possibility of crack sources, and improve the thermoplasticity of GH141. Effect

Inactive Publication Date: 2022-01-18
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the GH141 alloy produced by the prior art has poor thermoplasticity

Method used

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  • Method for improving thermoplasticity of GH141 difficult-to-deform high-temperature alloy
  • Method for improving thermoplasticity of GH141 difficult-to-deform high-temperature alloy
  • Method for improving thermoplasticity of GH141 difficult-to-deform high-temperature alloy

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Embodiment

[0024] The present invention provides two groups of embodiments adopting the technical solution of the present invention. The composition of the GH141 alloy used in Examples 1-2 is shown in Table 1 (the balance is Ni and unavoidable impurities).

[0025] The chemical composition / % of table 1 embodiment GH141 alloy

[0026] C Cr co Mo Al Ti B Example 1 0.09 19.58 11.35 10.40 1.40 3.10 0.007 Example 2 0.091 19.68 11.36 10.36 11.43 3.17 0.007 Zr Cu Fe Si mn P S Example 1 0.015 0.009 0.02 0.008 0.006 0.004 0.0011 Example 2 0.015 0.01 0.03 0.01 0.002 0.005 0.0013

[0027] The specific implementation steps of embodiment 1-2 are as follows:

[0028] A. Use the vacuum induction melting process to melt and cast according to the GH141 alloy composition in Table 1, and obtain the Φ200mm electrode rod;

[0029] B. After the electrode rod obtained in step A is cut off and peeled, it is smelted by vacuu...

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Abstract

The invention discloses a method for improving thermoplasticity of a GH141 difficult-to-deform high-temperature alloy, and belongs to the technical field of high-temperature alloy heat treatment. According to the method for improving the thermoplasticity of the GH141 difficult-to-deform high-temperature alloy, a GH141 cast ingot is subjected to homogenizing heat treatment, a multi-section heating and heat preservation method is adopted in the homogenizing heat treatment, specifically, in the first section, the temperature is controlled to be smaller than or equal to 600 DEG C, and the GH141 cast ingot is put into a furnace; in the second stage, the GH141 cast ingot is heated to 1060-1090 DEG C at the speed of less than or equal to 50 DEG C / h, and heat is preserved for 18-24 hours; in the third stage, the GH141 cast ingot is heated to 1170-1200 DEG C at the speed of less than or equal to 100 DEG C / h, and heat is preserved for 40-60 hours; and in the fourth stage, after heat preservation is finished, furnace cooling is conducted till the temperature is smaller than or equal to 300 DEG C, and discharging and air cooling are conducted. By means of the method for improving the thermoplasticity of the GH141 difficult-to-deform high-temperature alloy, element segregation of the GH141 alloy can be effectively solved, the as-cast dendritic structure is eliminated, the thermal deformation resistance of the GH141 cast ingot is reduced, the GH141 alloy has good plasticity within the temperature range of 1000-1180 DEG C, and the problem that the thermoplasticity of the GH141 alloy produced in the prior art is poor can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of heat treatment of high-temperature alloys, relates to GH141 alloys, and in particular relates to a method for improving the thermoplasticity of GH141 refractory high-temperature alloys. Background technique [0002] GH141 alloy is a precipitation-hardening nickel-based deformable superalloy with high degree of alloying, high deformation resistance, poor thermoplasticity, and narrow forging temperature range. During the solidification process, the main alloying elements Al, Ti, Mo, etc. have serious dendrite segregation phenomenon, which significantly affects the thermoplasticity of the alloy. High-temperature homogenization treatment can promote the diffusion and migration of solute element atoms, reduce and eliminate dendrite segregation, and dissolve possible harmful phases, thereby improving the thermoplasticity of the alloy. However, the homogenization treatment not only needs to consider the microst...

Claims

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Application Information

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IPC IPC(8): C22F1/10C22C19/05
CPCC22F1/10C22C19/056
Inventor 肖东平周扬付建辉杨浩笛
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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