T23水冷壁管排鳍片焊缝裂纹的分析  

The Analysis of Crystal Crack of T23 Waterwall Tube-fin

作　　者：杨亮[1] 

机构地区：[1]上海交通大学安泰经济与管理学院,上海200052

出　　处：《锅炉技术》2009年第6期55-58,共4页Boiler Technology

摘　　要：SA213-T23钢因具有良好的高温蠕变强度和焊接工艺性能,而被电站锅炉广泛采用,但SA213-T23用于百万等级螺旋水冷壁,因焊接应力、热校正等因素造成管子与扁钢角焊缝中心出现裂纹。主要对该钢种应用在螺旋水冷壁鳍片管时,角焊缝产生结晶裂纹的形成原因及防止措施进行研究。Because of the high creep strength and favorable weld ability under high temperature, the SA213--T23 is wildly used in utility boiler manufacture, but when used for spiral waterwll in 1 000 MW class utility boiler, the tubes of SA213--T23 have cracks at the fillet weld between tube and fin because of welding stress and hot adjustment. The article is subject to study the reason of crystal waterwall fin-to-tube welding and crack on fillet welds when SA213--T23 is used in spiral preventive measures accordingly

关 键 词：结晶裂纹 热校正 焊接应力 

分 类 号：TG441.4[金属学及工艺—焊接]