空气炉中铝-预镀层球墨铸铁钎焊工艺的实验研究  

Experimental study on brazing process of aluminum-pre-plated ductile iron in air furnace

作　　者：赵霞 耿浩天 吴一 Zhao Xia;Geng Haotian;Wu Yi(School of Materials Science & Engineering, Heilongjiang University of Science & Techndogy, Harbin 150022, China;China Construction Electric Power Construction Co.Ltd., Huizhou 516353, China;Xiangtan Electric Manufacturing Co.Ltd., Xiangtan 411100, China)

机构地区：[1]黑龙江科技大学材料科学与工程学院,哈尔滨150022 [2]中建电力建设有限公司,广东惠州516353 [3]湘潭电机股份有限公司,湖南湘潭411100

出　　处：《黑龙江科技大学学报》2021年第1期28-31,共4页Journal of Heilongjiang University of Science And Technology

基　　金：黑龙江省自然科学基金项目(E2018054)。

摘　　要：为了实现铝和球墨铸铁的钎焊,利用球墨铸铁热浸镀铝的预镀覆工艺,将铝-预镀层球墨铸铁置于空气炉钎焊,研究炉中钎焊工艺参数对钎焊接头微观组织及剪切性能的影响。实验结果表明:铝-预镀层球墨铸铁钎焊接头由铝、钎缝中心区、铁铝金属间化合物IMC层、球墨铸铁构成;在实验条件下,钎焊温度升高或保温时间延长,均会使钎料同母材相互扩散加剧,钎焊接头微观组织先致密再粗化。钎焊温度540℃,保温时间15 min时,钎焊接头剪切强度最高。This paper aims to realize the brazing of aluminum and ductile iron.The realization is done by brazing the aluminum-pre-plated ductile iron in the air furnace using the pre-plating process of hot-dip aluminum plating of ductile iron,and the study is focused on investigating the influence of the brazing process parameters in the furnace on the microstructure of the brazed joint and shearing performance.The results show that the aluminum-pre-plated ductile iron brazing joint is composed of aluminum,the central area of the brazing seam,the iron-aluminum intermetallic compound IMC layer,and the ductile iron;under the experimental conditions,the higher brazing temperature or the longer holding time tends to intensifiy the mutual diffusion of the solder and the base metal and leave the microstructure of the brazed joint dense and then coarsened;and given the brazing temperature of 540℃and the holding time of 15 min,the shear strength of the brazed joint is the highest.

关 键 词：球墨铸铁 铝 炉中钎焊 显微组织 剪切强度 

分 类 号：TG457.1[金属学及工艺—焊接]