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采用手工钨极氩弧焊方法对不锈钢-殷钢进行焊接试验,并对焊接试件进行了外观检查、无损检测、拉伸及弯曲测试。结果表明:外观检查没有发现裂纹、未熔合、未焊透等缺陷,依据JB/T4730.2-2005标准均为I级焊缝;常温测试采用殷钢焊丝焊接接头抗拉强度较高,为殷钢母材的92%左右;常温、液氮冷却测试采用不锈钢焊丝焊接接头抗拉强度为不锈钢母材的73%左右;常温、液氮冷却检测面弯、背弯弯曲角度≥120°试样未开裂;液氮冷却检测气密性漏率≤6.7×10-9Pa·m3/s。
The welding test of stainless steel-Invar was carried out by manual TIG welding. The appearance, non-destructive testing, tensile test and bending test of welded specimens were carried out. The results show that there are no defects such as cracks, unfused and incomplete penetration in the visual inspection. According to the standard of JB / T4730.2-2005, they are all Class I welds. At room temperature, the welded joints with invar wire welding wire have higher tensile strength, 92% of the steel base metal; cold test of the room temperature, liquid nitrogen using stainless steel wire welded joints tensile strength of about 73% of stainless steel base material; room temperature, liquid nitrogen cooling test surface bending, back bending bending angle ≥ 120 ° specimen Cracking; liquid nitrogen cooling test leak tightness ≤ 6.7 × 10-9Pa · m3 / s.