不锈钢及耐热耐蚀合金焊接热裂纹概述  

Summary on welding hot crack in stainless steel and heat-corrosion resistant alloy

作　　者：尹士科 李凤辉 

机构地区：[1]中国钢研科技集团有限公司,北京市100081

出　　处：《焊接》2012年第10期35-38,70-71,共4页Welding & Joining

摘　　要：概述了不锈钢及耐热耐蚀合金的几种焊接热裂纹,包括焊缝中的凝固裂纹、熔合线附近的液化裂纹和粗晶区的低塑性裂纹。综合各方面的试验结果得出,热裂纹的产生与材料因素和力学因素有关。材料因素包括凝固脆性温度区间、低塑性温度区间和材料的最低塑性值,力学因素包括应变速度、应变量及其叠加作用。The hot cracks in stainless steel and heat-corrosion resistant alloy were introduced,which includes solidification crack in weld metal, liquation crack in fusion line,ductility-dip crack in coarse grained region.All tests show that material factor and mechanical factor have the influence on the weld heat crack.Material factor includes brittleness temperature range,ductility-dip temperature range and the ductile of ma- terial.Mechanical factor includes strain rate,strain capacity and their combination effect.

关 键 词：不锈钢 凝固裂纹 液化裂纹 低塑性裂纹 

分 类 号：TG401[金属学及工艺—焊接]