孟凡玲,吕曜晨,武小娟,孙焕焕

• 1:沈阳理工大学材料科学与工程学院
• 2:沈阳欣泰隆机械制造有限公司

摘要(Abstract)：

采用冷金属过渡(CMT)焊对异种金属T2和1060Al进行焊接,选用S301、ER4043、ER4047 3种焊丝作为填充材料,研究在适当工艺参数下,焊丝成分对焊接接头组织、相组成、界面化合物形态及硬度的影响。结果表明:3种焊丝焊接的接头均由焊缝区、结合区、熔合区组成,且靠Cu侧的焊缝结合区均生成了较厚的界面化合物层。结合区的组织主要为(α-Al+Cu Al2)共晶和Cu Al2金属间化合物相,当采用含Si量12.0%的ER4047焊接时结合区还析出了块状Si。焊丝中添加Si元素,抑制了靠Cu侧焊缝区界面化合物生长,并改变了化合物形态。同时,界面化合物生成,也导致3种焊缝均在靠Cu侧出现显微硬度的高峰区。

关键词(KeyWords)： 铝硅焊丝;冷金属过渡(CMT)焊;异种金属;显微组织

Abstract:

Keywords:

基金项目(Foundation): 辽宁省教育厅一般项目(L2013094);; 沈阳市科技局项目(18110424B02025225102);; 沈阳理工大学材料先进加工技术重点实验室开放基金(4771004kfs17)

作者(Author): 孟凡玲,吕曜晨,武小娟,孙焕焕

DOI: 10.13289/j.issn.1009-6264.2016.06.016

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