奧氏體(ti)不銹鋼的(de)(de)(de)縫焊(han)，其焊(han)接(jie)(jie)(jie)接(jie)(jie)(jie)頭(tou)的(de)(de)(de)力(li)(li)學性能、焊(han)接(jie)(jie)(jie)質(zhi)量及焊(han)接(jie)(jie)(jie)條件等，都與點(dian)焊(han)一樣(yang)。選擇焊(han)接(jie)(jie)(jie)條件時(shi)(shi)(shi)，因(yin)(yin)為母(mu)材的(de)(de)(de)高(gao)強度高(gao)，應采(cai)用較高(gao)的(de)(de)(de)電(dian)(dian)極壓力(li)(li)來抑(yi)制產生(sheng)焊(han)接(jie)(jie)(jie)缺陷(xian)。通(tong)電(dian)(dian)時(shi)(shi)(shi)間(jian)宜(yi)短，通(tong)電(dian)(dian)中(zhong)電(dian)(dian)極移動距離要(yao)小。通(tong)電(dian)(dian)時(shi)(shi)(shi)間(jian)短，電(dian)(dian)流強度就(jiu)要(yao)加大(da)，電(dian)(dian)極的(de)(de)(de)消耗就(jiu)加快。若是斷(duan)續通(tong)電(dian)(dian)，斷(duan)電(dian)(dian)時(shi)(shi)(shi)間(jian)應是通(tong)電(dian)(dian)時(shi)(shi)(shi)間(jian)的(de)(de)(de)兩倍以上。若斷(duan)電(dian)(dian)時(shi)(shi)(shi)間(jian)或者焊(han)接(jie)(jie)(jie)速度慢，可(ke)能因(yin)(yin)為分流作用，在焊(han)接(jie)(jie)(jie)下(xia)一個(ge)點(dian)時(shi)(shi)(shi)，使前一個(ge)焊(han)點(dian)再熔化，可(ke)能因(yin)(yin)為對(dui)該(gai)點(dian)已經不受壓力(li)(li)而產生(sheng)缺陷(xian)。

  要想得到(dao)致(zhi)密(mi)的(de)縫焊接頭，除應當(dang)選用合適的(de)焊接電(dian)(dian)流外(wai)，還要調整焊接速度及(ji)通(tong)／斷(duan)電(dian)(dian)時間。要使焊點的(de)重復量達到(dao)焊點直徑的(de)10%~25%。表3-33所示為(wei)奧氏體(ti)不銹鋼(gang)的(de)焊接條件。由于(yu)不銹鋼(gang)的(de)熱傳導不良及(ji)電(dian)(dian)阻率較(jiao)大(da)(da)，所以，連續通(tong)電(dian)(dian)比斷(duan)續通(tong)電(dian)(dian)對母材(cai)的(de)熱影響大(da)(da)，變形也大(da)(da)。電(dian)(dian)極材(cai)料適用RWMA的(de)2級或3級，電(dian)(dian)極端部要平或者梯(ti)形。