奧(ao)氏體不銹鋼(gang)的(de)(de)縫焊(han)(han)，其焊(han)(han)接接頭的(de)(de)力(li)學(xue)性能(neng)、焊(han)(han)接質量及焊(han)(han)接條件等，都與點焊(han)(han)一樣。選擇焊(han)(han)接條件時(shi)，因(yin)(yin)為母材的(de)(de)高強度高，應采(cai)用較高的(de)(de)電(dian)(dian)(dian)極(ji)壓力(li)來抑(yi)制產生焊(han)(han)接缺陷。通(tong)電(dian)(dian)(dian)時(shi)間(jian)(jian)宜短，通(tong)電(dian)(dian)(dian)中電(dian)(dian)(dian)極(ji)移動距離要小。通(tong)電(dian)(dian)(dian)時(shi)間(jian)(jian)短，電(dian)(dian)(dian)流強度就要加大，電(dian)(dian)(dian)極(ji)的(de)(de)消耗就加快。若是斷(duan)續通(tong)電(dian)(dian)(dian)，斷(duan)電(dian)(dian)(dian)時(shi)間(jian)(jian)應是通(tong)電(dian)(dian)(dian)時(shi)間(jian)(jian)的(de)(de)兩倍以(yi)上。若斷(duan)電(dian)(dian)(dian)時(shi)間(jian)(jian)或(huo)者(zhe)焊(han)(han)接速度慢，可能(neng)因(yin)(yin)為分流作用，在焊(han)(han)接下一個(ge)點時(shi)，使前一個(ge)焊(han)(han)點再熔化，可能(neng)因(yin)(yin)為對該點已經不受壓力(li)而產生缺陷。

  要想得到致密的(de)(de)縫焊(han)(han)接頭，除(chu)應當選用合適的(de)(de)焊(han)(han)接電(dian)(dian)流外，還要調整焊(han)(han)接速度及通／斷電(dian)(dian)時間。要使焊(han)(han)點的(de)(de)重復量達到焊(han)(han)點直徑(jing)的(de)(de)10%~25%。表3-33所(suo)示為奧氏體(ti)不(bu)銹鋼的(de)(de)焊(han)(han)接條件。由于不(bu)銹鋼的(de)(de)熱傳導(dao)不(bu)良及電(dian)(dian)阻率(lv)較大(da)，所(suo)以(yi)，連續通電(dian)(dian)比(bi)斷續通電(dian)(dian)對母材的(de)(de)熱影(ying)響大(da)，變形也大(da)。電(dian)(dian)極材料適用RWMA的(de)(de)2級(ji)或(huo)3級(ji)，電(dian)(dian)極端部要平或(huo)者梯形。