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GH5188 high-temperature alloy material, heat treatment method and application

A technology of GH5188 and heat treatment method, which is applied in the field of GH5188 superalloy materials and heat treatment, and can solve problems such as easy cracks, uneven structure of steel ingots, and poor processing plasticity

Active Publication Date: 2022-04-22
JIANGXI BAOSHUNCHANG SPECIAL ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the GH5188 alloy steel ingot produced by the existing technology has obvious microsegregation, which leads to poor processing plasticity and cannot be directly billeted.
At the same time, the uneven structure of the steel ingot is not easy to be fully broken during hot working, which affects the hot workability of the alloy
However, the characteristics of GH5188 alloy cold work hardening speed and high recrystallization temperature will make the cold working process difficult and prone to defects such as cracks.

Method used

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  • GH5188 high-temperature alloy material, heat treatment method and application
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  • GH5188 high-temperature alloy material, heat treatment method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] S1. Placement of steel ingots: place GH5188 superalloy steel ingots with a diameter of 360mm on the cast iron of 250*250*1000;

[0035] S2. Primary heating: heat up the GH5188 superalloy ingot in step S1 to 600° C., and keep it warm for 4 hours;

[0036] S3. Secondary heating: heat up the GH5188 superalloy ingot that has completed step S2 to 950°C at a heating rate of 1.67°C / min, and keep it warm for 2.5h;

[0037] S4. Diffusion annealing: Diffusion annealing is performed on the GH5188 superalloy ingot that has completed step S3. First, the GH5188 superalloy ingot is heated to 1180° C. at a heating rate of 2.5° C. / min, and kept for 20 hours;

[0038] S5. Casting billet: the GH5188 superalloy ingot that has completed step S4 is forged and billeted.

[0039] After heat treatment, the GH5188 superalloy material is qualified by ultrasonic flaw detection, metallographic analysis, no carbide, no element segregation.

Embodiment 2

[0041] S1. Placement of steel ingots: place GH5188 superalloy steel ingots with a diameter of 300mm on the cast iron of 250*250*1000;

[0042] S2. Primary heating: heat up the GH5188 superalloy ingot in step S1 to 580° C., and keep it warm for 5 hours;

[0043] S3. Secondary heating: heat up the GH5188 superalloy ingot that has completed step S2 to 970°C at a heating rate of 1°C / min, and keep it warm for 3h;

[0044] S4. Diffusion annealing: Diffusion annealing is performed on the GH5188 superalloy ingot that has completed step S3. First, the temperature of the GH5188 superalloy ingot is raised to 1220° C. at a heating rate of 2° C. / min and kept for 22 hours;

[0045] S5. Casting billet: the GH5188 superalloy ingot that has completed step S4 is forged and billeted.

[0046] After heat treatment, the GH5188 superalloy material is qualified by ultrasonic flaw detection, metallographic analysis, no carbide, no element segregation.

Embodiment 3

[0048] S1. Placement of steel ingots: place GH5188 superalloy steel ingots with a diameter of 360mm on the cast iron of 250*250*1000;

[0049] S2. Primary heating: heat up the GH5188 superalloy ingot in step S1 to 620° C., and keep it warm for 3 hours;

[0050] S3. Secondary heating: heat the GH5188 superalloy ingot that has completed step S2 to 930°C at a heating rate of 3°C / min, and keep it warm for 2h;

[0051] S4. Diffusion annealing: Diffusion annealing is performed on the GH5188 superalloy ingot that has completed step S3. First, the temperature of the GH5188 superalloy ingot is raised to 1180° C. at a heating rate of 2° C. / min, and kept for 18 hours;

[0052] S5. Casting billet: the GH5188 superalloy ingot that has completed step S4 is forged and billeted.

[0053] After heat treatment, the GH5188 superalloy material is qualified by ultrasonic flaw detection, metallographic analysis, no carbide, no element segregation.

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Abstract

The invention provides a GH5188 high-temperature alloy material as well as a heat treatment method and application thereof, and belongs to the technical field of metal processing. According to the heat treatment method of the GH5188 high-temperature alloy steel ingot, the GH5188 high-temperature alloy steel ingot is placed on cast iron, then heating and heat preservation are conducted, and finally forging cogging is conducted. According to the heat treatment method for the GH5188 high-temperature alloy steel ingot, the microstructure of the GH5188 high-temperature alloy steel ingot treated through the method is uniform through slow segmented heating and diffusion annealing, the hot working performance is good, and carbide and element segregation are avoided.

Description

technical field [0001] The invention relates to the technical field of metal processing, in particular to a GH5188 superalloy material, a heat treatment method and its application. Background technique [0002] GH5188 is a solid solution strengthened cobalt-based superalloy. 14% tungsten is added to the alloy for solid solution strengthening, so that the alloy has excellent high temperature thermal strength; 0.02% to 0.12% of La and 20% to 24% of Cr are added to the alloy , so that the alloy has good high temperature oxidation resistance and good cold and hot processing performance, which meets the requirements of high strength and oxidation resistance of aero-engine parts for alloy materials. The alloy is widely used in the manufacture of high-temperature components of gas turbines and missiles abroad, such as combustion chambers, exhaust nozzles, and heat exchangers in the nuclear energy industry. leaves etc. [0003] However, the GH5188 alloy steel ingot produced by the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/10C22C19/07B21J5/00
CPCC22F1/10C22C19/07B21J5/00
Inventor 廉斌季宏伟林玉
Owner JIANGXI BAOSHUNCHANG SPECIAL ALLOY CO LTD
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