固溶处理对粉末冶金GH4099合金组织及性能的影响

doi:10.13251/j.issn.0254-6051.2022.07.015

金属热处理 ›› 2022, Vol. 47 ›› Issue (7): 86-91.DOI: 10.13251/j.issn.0254-6051.2022.07.015

固溶处理对粉末冶金GH4099合金组织及性能的影响

王华¹, 王泽钰², 宋嘉明², 瞿宗宏², 赖运金², 梁书锦²

1.海军装备部, 陕西西安 710021;
2.西安欧中材料科技有限公司, 陕西西安 710018

收稿日期:2022-04-19 修回日期:2022-05-31 出版日期:2022-07-25 发布日期:2022-08-12
通讯作者: 王泽钰,助理工程师,E-mail:wangzeyuxaut@126.com
作者简介:王华(1978—),男,工程师,主要研究方向为金属材料性能。
基金资助:
陕西省重点研发计划(2021LLRH-05)

Effect of solution treatment on microstructure and properties of powder metallurgy GH4099 alloy

Wang Hua¹, Wang Zeyu², Song Jiaming², Qu Zonghong², Lai Yunjin², Liang Shujin²

1. Admiralty Equipment Department, Xi'an Shaanxi 710021, China;
2. Sino-Euro Materials Technologies of Xi'an Co., Ltd., Xi'an Shaanxi 710018, China

Received:2022-04-19 Revised:2022-05-31 Online:2022-07-25 Published:2022-08-12

摘要/Abstract

摘要： 通过等离子旋转电极雾化制粉和热等静压工艺制备了粉末冶金GH4099高温合金,并研究了固溶温度对该合金微观组织演变及室温、高温拉伸性能的影响规律。结果表明,粉末冶金GH4099合金微观组织均匀,晶粒尺寸接近原始粉末尺寸(~50 μm),并且无成分偏析。晶界处大尺寸的一次γ′相与碳化物交错分布,晶粒内部存在大量退火孪晶。随着固溶温度的升高,γ相晶粒逐渐长大,晶界处碳化物由断续状逐渐变为连续分布。当固溶温度为1140 ℃时,可获得与轧制件/锻件相当的室温及高温拉伸性能,但塑性较低,合金断口呈现出脆性解理断裂形貌,这主要与热处理过程中原始颗粒边界(PPB)处碳化物的析出有关。

关键词: GH4099高温合金, 热等静压, 固溶处理, 组织演变, 力学性能

Abstract: Powder metallurgy GH4099 superalloy was prepared by plasma rotating electrode process (PREP) and hot isostatic pressing (HIP). The effect of solution treatment temperature on microstructure evolution and tensile properties at room temperature and high temperature was studied. The results indicate that the microstructure of the PM GH4099 alloy is uniform, the grain size is close to original particle size (~50 μm) and no component segregation. The large-sized primary γ′ phase and carbides are interlaced at the grain boundaries, and there are a large number of annealing twins inside the grains. With the increase of solution treatment temperature, the γ phase grains grow gradually, and the carbides at the grain boundaries transfer from discontinuous to continuous distribution. When the solution treatment temperature is 1140 ℃, the room/high temperature tensile properties equivalent to those of rolling/forging parts can be obtained, but the plasticity is low, the tensile fracture presents brittle cleavage fracture morphology, which is mainly related to the precipitation of carbides at prior particle boundaries during heat treatment.

Key words: GH4099 superalloy, hot isostatic pressing, solution treatment, microstructure evolution, mechanical properties

中图分类号:

TG132.3⁺2

王华, 王泽钰, 宋嘉明, 瞿宗宏, 赖运金, 梁书锦. 固溶处理对粉末冶金GH4099合金组织及性能的影响[J]. 金属热处理, 2022, 47(7): 86-91.

Wang Hua, Wang Zeyu, Song Jiaming, Qu Zonghong, Lai Yunjin, Liang Shujin. Effect of solution treatment on microstructure and properties of powder metallurgy GH4099 alloy[J]. Heat Treatment of Metals, 2022, 47(7): 86-91.

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固溶处理对粉末冶金GH4099合金组织及性能的影响

Effect of solution treatment on microstructure and properties of powder metallurgy GH4099 alloy

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