钎焊后冷却速率对4004/308/4004复合板微观组织及力学性能的影响  

Effect of cooling rate on microstructure and mechanical properties of 4004/308/3004 composite sheet after brazing

作　　者：张文静 韩念梅 金晓杰 赵丕植 张云龙[2] ZHANG Wen-jing;HAN Nian-mei;JIN Xiao-jie;ZHAO Pi-zhi;ZHANG Yun-long(Chinalco Materials Application Research Institute Co.,Ltd.,Suzhou Branch,Suzhou 215026,China;Northeast Light Alloy Co.,Ltd.,Harbin 150060,China)

机构地区：[1]中铝材料应用研究院有限公司苏州分公司,江苏苏州215026 [2]东北轻合金有限责任公司,黑龙江哈尔滨150060

出　　处：《轻合金加工技术》2022年第4期62-69,共8页Light Alloy Fabrication Technology

基　　金：中国铝业集团有限公司科技发展基金项目(HX1848)。

摘　　要：采用金相显微镜、扫描电镜和透射电镜研究了钎焊后冷却速率对4004/308/4004复合板微观组织及力学性能的影响。研究结果表明:随着冷却速率减小,4004/308/4004复合板皮材向芯材的熔蚀深度逐渐增加,芯材电导率逐渐增大。冷却速率对复合板钎焊后的自然时效效果有显著影响,随着冷却速率的减小,自然时效效果减弱,芯材中粗大第二相AlMn(Fe)Si相(尺寸大于1μm)明显增多,AlMnSi弥散相(尺寸100 nm~200 nm)逐渐粗化。Effect of cooling rate on the microstructure and mechanical properties of 4004/308/3004 composite sheets after brazing were studied by means of optical microscopy,scanning electron microscope and transmission electron microscopy.The results show that with the decrease of cooling rate,the dissolution depth of 4004/308/4004 composite sheets from the clad to the core increases gradually and the conductivity of the core material increases gradually.The cooling rate has a significant effect on the natural aging effect of the brazed composite sheets.With the decrease of cooling rate,the natural aging effect decreases,the second phase AlMn(Fe)Si(>1 μm) of the core material increases obviously and the dispersed phase AlMnSi(100 nm-200 nm) gradually coarsens.

关 键 词：4004/308/4004复合板 钎焊 冷却速率 熔蚀深度 自然时效 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG454[金属学及工艺—金属材料]