时效工艺对C17200铍青铜组织与力学性能的影响

doi:10.13251/j.issn.0254-6051.2025.05.025

金属热处理 ›› 2025, Vol. 50 ›› Issue (5): 160-167.DOI: 10.13251/j.issn.0254-6051.2025.05.025

时效工艺对C17200铍青铜组织与力学性能的影响

邹泽之¹, 陈志彦¹, 刘会群², 吴海红³

1.中南林业科技大学材料科学与工程学院, 湖南长沙 410004;
2.中南大学材料科学与工程学院, 湖南长沙 410083;
3.中船九江海洋装备集团有限公司, 江西九江 332008

收稿日期:2024-11-13 修回日期:2025-03-29 发布日期:2025-06-25
通讯作者: 陈志彦,教授,博士,E-mail:spchen@163.com
作者简介:邹泽之(1996—),男,硕士,主要研究方向为铍青铜的组织和性能,E-mail:1213175222@qq.com。

Effect of aging process on microstructure and mechanical properties of C17200 beryllium bronze

Zou Zezhi¹, Chen Zhiyan¹, Liu Huiqun², Wu Haihong³

1. School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha Hunan 410004, China;
2. School of Materials Science and Engineering, Central South University, Changsha Hunan 410083, China;
3. CSSC Jiujiang Marine Equipment Group Co., Ltd., Jiujiang Jiangxi 332008, China

Received:2024-11-13 Revised:2025-03-29 Published:2025-06-25

摘要/Abstract

摘要： 采用维氏硬度计、电液伺服力学测试系统、X射线衍射仪、扫描电镜等手段分析了不同时效温度(280、320、360 ℃)和时效时间(1~300 min)对C17200合金微观组织和性能的影响。结果表明:时效温度越高,晶界处不连续脱溶胞的析出速度越快,向晶内呈弓形长大的速度也越快;固溶态合金内退火孪晶界占比61%,由于不连续脱溶胞对晶内结构的破坏,时效温度越高,孪晶界占比下降越多;时效态合金存在2.5%~6.1%的小角度晶界,相较固溶态中的1.1%有较大提升;力学性能测试表明,C17200合金较优的时效制度为320 ℃时效180 min,能得到最高的抗拉强度1206 MPa。

关键词: C17200铍青铜, 时效, 不连续脱溶胞, 微观组织, 力学性能

Abstract: Effects of aging temperature (280, 320, 360 ℃) and aging time (1-300 min) on the microstructure and properties of C17200 alloy were studied by means of Vickers hardness tester, electro hydraulic servo mechanics testing system, X-ray diffractometer and scanning electron microscope. The results show that the higher the aging temperature, the more rapid the precipitation rate of discontinuous precipitation at the grain boundary, and the faster the arcing growth rate into the grains. Moreover, the proportion of twin boundary in solution treated alloy is 61%, and decreases with aging temperature increasing due to the destruction of intragranular structure by discontinuous precipitates. The low angle grain boundary of 2.5%-6.1% exists in the aged alloy, which is much higher than that of 1.1% in the solution treated. The mechanical property test shows that the optimal aging process for the C17200 alloy is at 320 ℃ for 180 min, and as a result the highest tensile strength of 1206 MPa can be obtained.

Key words: C17200 beryllium bronze, aging, discontinuous precipitation, microstructure, mechanical properties

中图分类号:

TG166.2

邹泽之, 陈志彦, 刘会群, 吴海红. 时效工艺对C17200铍青铜组织与力学性能的影响[J]. 金属热处理, 2025, 50(5): 160-167.

Zou Zezhi, Chen Zhiyan, Liu Huiqun, Wu Haihong. Effect of aging process on microstructure and mechanical properties of C17200 beryllium bronze[J]. Heat Treatment of Metals, 2025, 50(5): 160-167.

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时效工艺对C17200铍青铜组织与力学性能的影响

Effect of aging process on microstructure and mechanical properties of C17200 beryllium bronze

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