CuNiSiCr电机滑环感应预热和钎焊过程中的失效分析.PDF

上半月出版 Casting Forging Welding 金属铸锻焊技术 CuNiSiCr 电机滑环感应预热和钎焊过程中的失效分析 1 2 董凯 袁 李学浩 渊1.济南钢铁集团有限公司袁 山东济南250 101 曰2.镇江四洋特种金属材料制造有限公司袁江苏镇江212003冤 摘 要院通过对用于电机滑环的CuNiSiCr 合金的化学成分尧力学性能尧金相以及钎焊时加热情况的综合分析袁结果 表明院成分偏高引起的材料高温塑性较低和加热过程中产 的应力存在是滑环开裂的主要原因遥 通过采取控制合金元 素含量以提高材料塑性尧焊接时均匀加热滑环内外侧以减小加热过程中应力的措施袁使电机滑环在钎焊前感应预热和 钎焊过程中再未出现开裂的现象遥 关键词院铜合金曰滑环曰钎焊曰开裂曰应力曰高温塑性 中图分类号院TG146.1+1曰TG454 文献标识码院A 文章编号院 Failure on Analysis of CuNiSiCr Motor Sliding Ring When Induction Preheating and Brazing 1 2 DONG Kai 袁 LI Xuehao 渊1. Jigang Group Co. Ltd., Jinan 250 101, China; 2. Zhenj iang Siyang Special Metal Material Manufacture Co. Ltd., Zhenji ang 212003, China 冤 Abstract 院Chemical constituents, mechanical properties, metallic-structure and heating complexion of the CuNiSiCr alloy used in sliding ring of the motor were analyzed synthetically. The results show that: the lower material Hot Ductility caused by the higher Chemical component and the stress caused by calefaction were the main causation. By controlling the content of alloy element to improve the material ductility, equably heating up the inner and outside flanks of sliding ring of the motor when welding, reduce the stress of calefaction process. After the improvement, sliding ring of the motor never rupture when induction heating and brazing . Key words 院copper alloy; sliding ring;brazing; craze; stress; hot