奧(ao)氏體不銹鋼的(de)縫焊(han)(han)，其焊(han)(han)接(jie)接(jie)頭(tou)的(de)力(li)學性能、焊(han)(han)接(jie)質量及(ji)焊(han)(han)接(jie)條(tiao)件等，都與點(dian)焊(han)(han)一(yi)(yi)樣(yang)。選擇焊(han)(han)接(jie)條(tiao)件時(shi)，因(yin)為母(mu)材的(de)高強(qiang)度高，應采用(yong)較高的(de)電(dian)(dian)(dian)極壓(ya)力(li)來抑制產生焊(han)(han)接(jie)缺陷(xian)。通電(dian)(dian)(dian)時(shi)間(jian)(jian)宜短，通電(dian)(dian)(dian)中(zhong)電(dian)(dian)(dian)極移動距離要小。通電(dian)(dian)(dian)時(shi)間(jian)(jian)短，電(dian)(dian)(dian)流強(qiang)度就(jiu)要加大，電(dian)(dian)(dian)極的(de)消耗就(jiu)加快。若是斷(duan)續(xu)通電(dian)(dian)(dian)，斷(duan)電(dian)(dian)(dian)時(shi)間(jian)(jian)應是通電(dian)(dian)(dian)時(shi)間(jian)(jian)的(de)兩倍以上。若斷(duan)電(dian)(dian)(dian)時(shi)間(jian)(jian)或(huo)者焊(han)(han)接(jie)速度慢，可能因(yin)為分(fen)流作用(yong)，在焊(han)(han)接(jie)下一(yi)(yi)個(ge)點(dian)時(shi)，使(shi)前一(yi)(yi)個(ge)焊(han)(han)點(dian)再熔(rong)化，可能因(yin)為對該(gai)點(dian)已經(jing)不受(shou)壓(ya)力(li)而產生缺陷(xian)。

  要(yao)想(xiang)得(de)到(dao)致密的(de)(de)縫(feng)焊接(jie)頭，除應當選(xuan)用合適(shi)的(de)(de)焊接(jie)電(dian)(dian)流外，還要(yao)調整焊接(jie)速度及通／斷電(dian)(dian)時間(jian)。要(yao)使(shi)焊點(dian)的(de)(de)重復量達到(dao)焊點(dian)直徑的(de)(de)10%~25%。表3-33所(suo)(suo)示為奧氏體不(bu)(bu)銹鋼的(de)(de)焊接(jie)條件。由于不(bu)(bu)銹鋼的(de)(de)熱(re)傳導不(bu)(bu)良及電(dian)(dian)阻率較大(da)，所(suo)(suo)以，連續(xu)通電(dian)(dian)比斷續(xu)通電(dian)(dian)對母(mu)材的(de)(de)熱(re)影響大(da)，變形也(ye)大(da)。電(dian)(dian)極(ji)材料適(shi)用RWMA的(de)(de)2級(ji)或3級(ji)，電(dian)(dian)極(ji)端部要(yao)平或者梯形。