奧(ao)氏體不銹鋼的(de)(de)縫焊(han)(han)，其焊(han)(han)接(jie)(jie)接(jie)(jie)頭的(de)(de)力學性能、焊(han)(han)接(jie)(jie)質量及焊(han)(han)接(jie)(jie)條(tiao)件等，都與(yu)點(dian)焊(han)(han)一(yi)樣(yang)。選擇焊(han)(han)接(jie)(jie)條(tiao)件時(shi)(shi)，因(yin)為(wei)母材(cai)的(de)(de)高強度(du)高，應(ying)采用較高的(de)(de)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)壓力來抑制產生(sheng)焊(han)(han)接(jie)(jie)缺陷。通(tong)(tong)(tong)電(dian)(dian)(dian)(dian)(dian)時(shi)(shi)間(jian)宜(yi)短，通(tong)(tong)(tong)電(dian)(dian)(dian)(dian)(dian)中電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)移動(dong)距離要小。通(tong)(tong)(tong)電(dian)(dian)(dian)(dian)(dian)時(shi)(shi)間(jian)短，電(dian)(dian)(dian)(dian)(dian)流強度(du)就要加大(da)，電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)的(de)(de)消耗就加快。若是(shi)斷續(xu)通(tong)(tong)(tong)電(dian)(dian)(dian)(dian)(dian)，斷電(dian)(dian)(dian)(dian)(dian)時(shi)(shi)間(jian)應(ying)是(shi)通(tong)(tong)(tong)電(dian)(dian)(dian)(dian)(dian)時(shi)(shi)間(jian)的(de)(de)兩(liang)倍以(yi)上。若斷電(dian)(dian)(dian)(dian)(dian)時(shi)(shi)間(jian)或者焊(han)(han)接(jie)(jie)速度(du)慢(man)，可(ke)能因(yin)為(wei)分流作用，在(zai)焊(han)(han)接(jie)(jie)下一(yi)個點(dian)時(shi)(shi)，使前一(yi)個焊(han)(han)點(dian)再(zai)熔化(hua)，可(ke)能因(yin)為(wei)對(dui)該點(dian)已經不受(shou)壓力而產生(sheng)缺陷。

  要(yao)(yao)(yao)想(xiang)得到致密的(de)(de)(de)縫焊(han)(han)(han)接頭，除應當選用合適(shi)(shi)的(de)(de)(de)焊(han)(han)(han)接電(dian)(dian)(dian)流(liu)外(wai)，還要(yao)(yao)(yao)調整焊(han)(han)(han)接速度及通(tong)／斷(duan)電(dian)(dian)(dian)時間。要(yao)(yao)(yao)使(shi)焊(han)(han)(han)點的(de)(de)(de)重(zhong)復(fu)量達到焊(han)(han)(han)點直徑(jing)的(de)(de)(de)10%~25%。表3-33所示為奧(ao)氏體不(bu)銹鋼(gang)的(de)(de)(de)焊(han)(han)(han)接條(tiao)件(jian)。由于不(bu)銹鋼(gang)的(de)(de)(de)熱傳(chuan)導不(bu)良(liang)及電(dian)(dian)(dian)阻(zu)率較大(da)(da)，所以，連續通(tong)電(dian)(dian)(dian)比斷(duan)續通(tong)電(dian)(dian)(dian)對母材(cai)(cai)的(de)(de)(de)熱影響大(da)(da)，變形也大(da)(da)。電(dian)(dian)(dian)極材(cai)(cai)料適(shi)(shi)用RWMA的(de)(de)(de)2級(ji)或3級(ji)，電(dian)(dian)(dian)極端(duan)部(bu)要(yao)(yao)(yao)平或者梯形。