真空热处理对BCu35NiMnCoSi铜基钎料组织和硬度的影响  

Effect of vacuum heat treatment on microstructure and hardness of BCu35NiMnCoSi copper based filler metal

作　　者：赵栋 董志 权纯逸 胡福常 李世健 Zhao Dong;Dong Zhi;Quan Chunyi;Hu Fuchang;Li Shijian(Shenyang Aircraft Industry(Group)Co.,Ltd,Shenyang Liaoning 110850,China;The First Military Representative Office of Air Equipment in Shenyang,Shenyang Liaoning 110850,China)

机构地区：[1]沈阳飞机工业(集团)有限公司,辽宁沈阳110850 [2]空装驻沈阳地区第一军事代表室,辽宁沈阳110850

出　　处：《金属热处理》2023年第5期191-195,共5页Heat Treatment of Metals

摘　　要：对BCu35NiMnCoSi铜基钎料进行不同工艺的真空热处理,并通过与传统空气炉热处理工艺对比,研究了真空热处理对其组织性能的影响。结果表明,BCu35NiMnCoSi钎料经真空热处理后的显微组织、硬度与传统空气炉处理基本一致。真空热处理工艺对BCu35NiMnCoSi钎料化学成分无影响,部分元素表面贫化是由于原材料贫化造成的。随加热温度升高、保温时间延长,钎料显微硬度降低。BCu35NiMnCoSi钎料优化的真空热处理工艺参数范围为870~880℃、15~25 min和890℃、15~20 min,在此参数下真空热处理BCu35NiMnCoSi钎料条,钎焊不锈钢导管焊缝无钎料瘤、气孔、烧穿及基体熔蚀等缺陷,导管气密性良好,满足使用要求。Vacuum heat treatment of BCu35NiMnCoSi copper based filler metal was carried out by different processes,and the effect of vacuum heat treatment on the microstructure and properties was studied by comparing with the traditional air furnace heat treatment process.The results show that the microstructure and hardness of the BCu35NiMnCoSi filler metal after vacuum heat treatment are basically the same as that of traditional air furnace treatment.The vacuum heat treatment process has no effect on the chemical composition of the BCu35NiMnCoSi filler metal,and the surface dilution of some elements is caused by the dilution of raw materials.With the increase of heating temperature and holding time,the microhardness of the filler metal decreases.The ranges of optimized vacuum heat treatment process parameters of the BCu35NiMnCoSi filler metal are from 870℃to 880℃,15 min to 25 min and 890℃,15 min to 20 min.With these parameters to vacuum heat treating the BCu35NiMnCoSi filler metal bar,the brazed stainless steel pipe weld has no defects such as filler metal nodule,pore,burn through and matrix melting erosion,and the welded pipe has good air tightness and meets the usage requirements.

关 键 词：BCu35NiMnCoSi钎料 真空热处理 显微组织 显微硬度 化学成分 

分 类 号：TG156.1[金属学及工艺—热处理]