高性能紧固件用A286高温合金的组织与力学性能

doi:10.13251/j.issn.0254-6051.2026.02.005

金属热处理 ›› 2026, Vol. 51 ›› Issue (2): 33-37.DOI: 10.13251/j.issn.0254-6051.2026.02.005

高性能紧固件用A286高温合金的组织与力学性能

董晨曦¹, 李艳军¹, 张亚楠¹, 陈波¹, 刘晨璐¹, 司家勇²

1.河南航天精工制造有限公司, 河南信阳 464000;
2.中南林业科技大学机械与智能制造学院, 湖南长沙 410075

收稿日期:2025-09-13 修回日期:2025-12-26 发布日期:2026-03-05
作者简介:董晨曦(1989—),男,高级工程师,主要从事紧固件工艺方面的研究,E-mail:dong_chenxi@casic694.com
基金资助:
河南省紧固连接技术重点实验室开放课题(JGLJ2401)

Microstructure and mechanical properties of A286 superalloy for high-performance fasteners

Dong Chenxi¹, Li Yanjun¹, Zhang Yanan¹, Chen Bo¹, Liu Chenlu¹, Si Jiayong²

1. Henan Aerospace Precision Machining Co., Ltd., Xinyang Henan 464000, China;
2. School of Mechanical and Intelligent Manufacturing, Central South University of Forestry and Technology, Changsha Hunan 410075, China

Received:2025-09-13 Revised:2025-12-26 Published:2026-03-05

摘要/Abstract

摘要： 利用金相显微镜、硬度计及电子万能试验机,研究了固溶及时效处理后高性能紧固件用国产A286高温合金的显微组织、晶粒度、硬度及室温、高温拉伸性能,并与进口A286合金的组织与性能进行了对比。结果表明:不同批次国产A286合金平均晶粒度等级分别为8.5级、9.5级和9.5级,相较进口合金的晶粒度7.7级更细,满足标准要求;不同批次国产A286合金固溶态硬度平均值为186~189 HBS,时效后的硬度平均值达到36.4~38.3 HRC,高于进口A286合金;随着测试温度的升高,不同批次国产A286合金的抗拉强度、屈服强度和断后伸长率逐渐降低,断面收缩率保持在48%~52%之间,拉伸性能优于进口A286合金,有利于保证高性能紧固件产品的质量。

关键词: 高温合金, 晶粒度, 硬度, 拉伸性能

Abstract: Microstructure, grain size, hardness and room temperature and high temperature tensile properties of the domestic A286 superalloy used in high-performance fasteners were investigated by means of metallographic microscope, hardness tester and electronic universal testing machine, and compared with the microstructure and properties of imported A286 alloy. The results show that the average grain size of different batches of domestic A286 alloy is grade 8.5, 9.5 and 9.5, respectively, which are finer than that of the imported alloy(grade 7.7) and meet the standard requirement. The average hardness of different batches of domestic A286 alloy in solution state is 186-189 HBS, the average hardness after aging reaches 36.4-38.3 HRC, higher than that of imported A286 alloy. With the increase of test temperature, the tensile strength, yield strength and elongation after fracture of different batches of the A286 alloy gradually decrease, the percentage reduction of area is in the range of 48%-52%. The tensile properties of the A286 superalloy are better than that of imported A286 alloy, which is benefit to improve the quality of high-performance fastener products.

Key words: superalloy, grain size, hardness, tensile properties

中图分类号:

董晨曦, 李艳军, 张亚楠, 陈波, 刘晨璐, 司家勇. 高性能紧固件用A286高温合金的组织与力学性能[J]. 金属热处理, 2026, 51(2): 33-37.

Dong Chenxi, Li Yanjun, Zhang Yanan, Chen Bo, Liu Chenlu, Si Jiayong. Microstructure and mechanical properties of A286 superalloy for high-performance fasteners[J]. Heat Treatment of Metals, 2026, 51(2): 33-37.

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高性能紧固件用A286高温合金的组织与力学性能

Microstructure and mechanical properties of A286 superalloy for high-performance fasteners

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