奧氏體不銹(xiu)鋼(gang)的縫焊(han)，其焊(han)接接頭的力(li)學性能、焊(han)接質量(liang)及焊(han)接條件等，都與點(dian)焊(han)一(yi)樣。選擇(ze)焊(han)接條件時(shi)(shi)(shi)，因為(wei)母(mu)材的高(gao)強度高(gao)，應(ying)采用較高(gao)的電(dian)極壓力(li)來抑(yi)制產生(sheng)焊(han)接缺陷(xian)。通(tong)電(dian)時(shi)(shi)(shi)間宜短，通(tong)電(dian)中電(dian)極移動距離要小。通(tong)電(dian)時(shi)(shi)(shi)間短，電(dian)流(liu)強度就要加大，電(dian)極的消耗(hao)就加快(kuai)。若是斷(duan)續通(tong)電(dian)，斷(duan)電(dian)時(shi)(shi)(shi)間應(ying)是通(tong)電(dian)時(shi)(shi)(shi)間的兩倍(bei)以上(shang)。若斷(duan)電(dian)時(shi)(shi)(shi)間或者(zhe)焊(han)接速度慢(man)，可能因為(wei)分流(liu)作(zuo)用，在(zai)焊(han)接下一(yi)個點(dian)時(shi)(shi)(shi)，使前一(yi)個焊(han)點(dian)再熔化，可能因為(wei)對該點(dian)已經不受壓力(li)而(er)產生(sheng)缺陷(xian)。

  要(yao)想得到致(zhi)密的(de)(de)(de)縫焊(han)接(jie)頭，除應當(dang)選用合適的(de)(de)(de)焊(han)接(jie)電(dian)(dian)(dian)(dian)流外，還要(yao)調整焊(han)接(jie)速度及(ji)通(tong)／斷(duan)電(dian)(dian)(dian)(dian)時間(jian)。要(yao)使焊(han)點(dian)的(de)(de)(de)重復量達到焊(han)點(dian)直徑的(de)(de)(de)10%~25%。表3-33所(suo)示(shi)為奧氏(shi)體不(bu)銹鋼(gang)的(de)(de)(de)焊(han)接(jie)條件。由于不(bu)銹鋼(gang)的(de)(de)(de)熱(re)傳(chuan)導不(bu)良及(ji)電(dian)(dian)(dian)(dian)阻率較大(da)(da)，所(suo)以，連續(xu)通(tong)電(dian)(dian)(dian)(dian)比(bi)斷(duan)續(xu)通(tong)電(dian)(dian)(dian)(dian)對(dui)母材的(de)(de)(de)熱(re)影響大(da)(da)，變形也大(da)(da)。電(dian)(dian)(dian)(dian)極(ji)材料適用RWMA的(de)(de)(de)2級或(huo)3級，電(dian)(dian)(dian)(dian)極(ji)端部(bu)要(yao)平或(huo)者梯形。