铝合金复合板钎焊层的初晶硅控制  

Control of primary crystal silicon in the brazing layer of aluminum alloy composite sheet

作　　者：陈攀 CHEN Pan(Arconic(Kunshan)Aluminum Products Co.,Ltd.,Kunshan 215332,China)

机构地区：[1]奥科宁克(昆山)铝业有限公司,江苏昆山215332

出　　处：《轻合金加工技术》2023年第11期11-14,共4页Light Alloy Fabrication Technology

摘　　要：钎焊用铝合金复合板外层使用的是亚共晶铝硅合金,钎焊时粗大初晶硅熔蚀芯材,降低铝合金复合板的成形性能。分析了亚共晶铝硅合金的初晶硅产生原理,研究了细化初晶硅的方法。降低原材料磷含量和增加铸造冷却强度有助于减少初晶硅,且不影响钎焊性能。The brazing liner of aluminum alloy composite brazing sheet is made of hypoeu-tectic aluminum silicon alloy.During brazing,coarse primary silicon erodes the core materi-al,reducing the formability of aluminum alloy composite sheet.This article analyzes the principle of primary silicon production in hypoeutectic aluminum silicon alloys and studies the methods of refining primary silicon.It is concluded that reducing the phosphorus content of raw materials and increasing the casting cooling strength helps to reduce primary crystal silicon without affecting the brazing performance.

关 键 词：铝合金复合钎焊材 亚共晶铝硅合金 初晶硅 磷含量 熔蚀 

分 类 号：TG146.21[一般工业技术—材料科学与工程]