443铁素体不锈钢电阻缝焊接头的组织与性能

摘要

对0.4 mm厚443铁素体不锈钢板进行了电阻缝焊试验,分析了随焊水冷与自然冷却两种状态下接头的组织、静载拉伸性能、杯凸拉伸性能和耐晶间腐蚀性能.结果表明:443铁素体不锈钢焊接接头的焊缝熔合区为粗大的柱状晶组织,热影响区的晶粒度与母材的接近,水冷对热影响区的晶粒尺寸没有明显影响；接头具有较高的静载强度,其塑性约为母材的72％；接头具有良好的耐晶间腐蚀性能.%Resistance seam welding test was used to weld 443 ferritic stainless steel sheets of 0. 4 mm thickness. The microstructure. static load tensile property, cup raised tensile property and intergranular corrosion resistance of the weld joints with natural cooling and trailing water cooling were analyzed. The results show that the microstructure of fusion zone was bulky columnar grains and the grain size of heat-affected zone (HAZ)was near to that of base metal, which demonstrated that the way of water cooling had no significant effects on grain size of the joints; the static load tensile strength of the weld joints were high, and the ductility was about 72% of the base metal. The intergranular corrosion resistance of the weld joints were good.