摘要
系统地研究了紫铜厚板TIG焊时,预热对焊接接头微观形貌组织的影响、力学性能的改善及其带来的其它问题。分析发现,预热虽然可以减小焊接接头结晶裂纹的倾向,提高接头拉伸强度,但是高温预热却使得焊件表面氧化严重,焊接试板变形大,且母材、热影响区和焊缝晶粒严重长大。
Effects of preheating on the microstructure and mechanical properties of gas tungsten arc welded joints were investigated. The preheating reduced the crystal cracks and increased the tensile strength of welded joints, but which made the workpiece surface oxidized seriously and distorted greatly as well as the crystalline grains grown seriously in base metal, heat- affected zone and welded metal.
出处
《焊接》
北大核心
2005年第9期58-61,共4页
Welding & Joining
