奧氏體(ti)不(bu)銹鋼的(de)(de)縫焊(han)(han)(han)，其(qi)焊(han)(han)(han)接接頭的(de)(de)力(li)學性(xing)能(neng)(neng)(neng)、焊(han)(han)(han)接質量及(ji)焊(han)(han)(han)接條(tiao)件等，都與(yu)點(dian)焊(han)(han)(han)一(yi)(yi)樣。選(xuan)擇焊(han)(han)(han)接條(tiao)件時(shi)，因為(wei)母材的(de)(de)高(gao)(gao)強度高(gao)(gao)，應(ying)采用較高(gao)(gao)的(de)(de)電(dian)(dian)極壓力(li)來抑制產生焊(han)(han)(han)接缺(que)陷。通(tong)電(dian)(dian)時(shi)間(jian)(jian)宜短，通(tong)電(dian)(dian)中電(dian)(dian)極移動距離要小。通(tong)電(dian)(dian)時(shi)間(jian)(jian)短，電(dian)(dian)流強度就要加大，電(dian)(dian)極的(de)(de)消耗就加快。若是斷續通(tong)電(dian)(dian)，斷電(dian)(dian)時(shi)間(jian)(jian)應(ying)是通(tong)電(dian)(dian)時(shi)間(jian)(jian)的(de)(de)兩(liang)倍(bei)以上。若斷電(dian)(dian)時(shi)間(jian)(jian)或者焊(han)(han)(han)接速度慢，可(ke)能(neng)(neng)(neng)因為(wei)分流作用，在(zai)焊(han)(han)(han)接下(xia)一(yi)(yi)個點(dian)時(shi)，使(shi)前一(yi)(yi)個焊(han)(han)(han)點(dian)再熔化(hua)，可(ke)能(neng)(neng)(neng)因為(wei)對該點(dian)已經不(bu)受壓力(li)而產生缺(que)陷。

  要(yao)想得到致密的(de)縫焊(han)接(jie)(jie)(jie)頭，除(chu)應當(dang)選用(yong)合適的(de)焊(han)接(jie)(jie)(jie)電(dian)(dian)流外，還要(yao)調整焊(han)接(jie)(jie)(jie)速度及(ji)通／斷電(dian)(dian)時間。要(yao)使(shi)焊(han)點(dian)的(de)重復量達到焊(han)點(dian)直徑的(de)10%~25%。表3-33所示(shi)為(wei)奧氏體不銹鋼的(de)焊(han)接(jie)(jie)(jie)條(tiao)件(jian)。由于(yu)不銹鋼的(de)熱傳導不良及(ji)電(dian)(dian)阻率較(jiao)大，所以，連續(xu)通電(dian)(dian)比斷續(xu)通電(dian)(dian)對(dui)母材(cai)的(de)熱影響大，變形也(ye)大。電(dian)(dian)極(ji)材(cai)料適用(yong)RWMA的(de)2級(ji)或3級(ji)，電(dian)(dian)極(ji)端部要(yao)平或者梯(ti)形。