摘要
开展了8 mm厚304不锈钢板K-TIG焊工艺试验,探索了错边量对接头性能的影响。结果表明:随着错边量增加,熔池形态扭曲程度加重,高位侧咬边不断增大;磁偏吹导致电弧热主要集中于焊缝区,焊缝及熔合区内奥氏体晶界处析出碳化物增多,热影响区内奥氏体粗化程度降低,硬化程度下降。接头薄弱环节由热影响区向焊缝区转移,抗拉性能及塑性也有所下降。然而,K-TIG焊对3 mm以内错边的适应性仍满足实际使用需求。
K-TIG welding process test of 304 stainless steel plate with 8 mm thickness was carried out. The effect of misalignment on the properties of joint was studied. The results show that with the increase of misalignment, the warping degree of molten pool morphology increases and the undercut of high side increases. The heat of arc due to magnetic bias blowing mainly concentrates in the weld zone. Carbide precipitation increases at austenite grain boundary in weld and fusion zone, and the austenite coarsening degree decreases, which leads to the decrease of hardening degree in HAZ. The weakness of joint transfers from HAZ to WZ(weld zone), tensile properties and plasticity of joint also reduce. However, the adaptability of K-TIG welding to misalignment within 3 mm still meets the practical requirements.
作者
王伟
周传昆
陈浩
WANG Wei;ZHOU Chuankun;CHEN Hao(NR Electric Power Electronics Co.,Ltd.,Changzhou 213025,China)
出处
《热加工工艺》
北大核心
2021年第5期160-162,共3页
Hot Working Technology
基金
常州市柔性输变电装备技术应用重点实验室项目(CM20163004)。
关键词
K-TIG焊
错边量
不锈钢
性能
K-TIG welding
misalignment
stainless steel
property