QBe2铍青铜插接件断裂原因分析  

Fracture cause analysis of QBe2 beryllium bronze connector

作　　者：魏彩丽 张沈洁 杜冈峰 Wei Caili;Zhang Shenjie;Du Gangfeng(Manufacturing Engineering Center,First Tractor Company Limited,Luoyang Henan 471004,China;Luoyang Key Laboratory of Mechanical Product Failure Analysis,Luoyang Henan 471004,China)

机构地区：[1]第一拖拉机股份有限公司制造工程中心,河南洛阳471004 [2]洛阳市机械产品失效分析重点实验室,河南洛阳471004

出　　处：《金属热处理》2022年第7期286-288,共3页Heat Treatment of Metals

摘　　要：某型号QBe2铍青铜插接件在使用中发生断裂,通过微观形貌观察、化学成分分析、显微组织观察和硬度测试等方法分析了断裂的原因,并提出了质量控制措施。结果表明,在固溶时效过程中,由于热电偶测温不准确导致零件过热,引起晶粒粗大,晶间结合力下降。在受到外力的作用下,从晶界位置发生断裂。建议对热电偶进行定期监测和维护,以保证设备正常运行。A batch of connector made of QBe2 fractured in the course of service was fratured. Reason for fracture was analyzed by the methods such as microscopic morphology observation, chemical composition analysis, microstructure observation and hardness test;and contral mensuren was proposed. The results show that overheating of the connector caused in thermocouples fail lead to coarse grain in solution and aging treatment. The strength of the grain boundary becomes lower than the matrix, and lead to the fracture of connector when it is subjected to external force. Therefore, it is recommended to regularly monitor and maintain the thermocouple to ensure the normal operation of the equipment.

关 键 词：铍青铜 过热 断裂 

分 类 号：TG172.9[金属学及工艺—金属表面处理]