奧(ao)氏體(ti)不(bu)銹(xiu)鋼的(de)(de)(de)(de)縫(feng)焊，其焊接(jie)(jie)(jie)接(jie)(jie)(jie)頭的(de)(de)(de)(de)力學(xue)性(xing)能、焊接(jie)(jie)(jie)質量及焊接(jie)(jie)(jie)條(tiao)件等，都(dou)與(yu)點焊一(yi)樣。選(xuan)擇焊接(jie)(jie)(jie)條(tiao)件時(shi)(shi)，因(yin)為母材(cai)的(de)(de)(de)(de)高(gao)強度高(gao)，應采用較高(gao)的(de)(de)(de)(de)電(dian)(dian)極壓(ya)力來抑(yi)制產生焊接(jie)(jie)(jie)缺(que)陷(xian)。通電(dian)(dian)時(shi)(shi)間(jian)(jian)(jian)(jian)宜(yi)短，通電(dian)(dian)中電(dian)(dian)極移動距離(li)要小。通電(dian)(dian)時(shi)(shi)間(jian)(jian)(jian)(jian)短，電(dian)(dian)流強度就(jiu)要加大，電(dian)(dian)極的(de)(de)(de)(de)消耗就(jiu)加快(kuai)。若(ruo)是(shi)斷(duan)續(xu)通電(dian)(dian)，斷(duan)電(dian)(dian)時(shi)(shi)間(jian)(jian)(jian)(jian)應是(shi)通電(dian)(dian)時(shi)(shi)間(jian)(jian)(jian)(jian)的(de)(de)(de)(de)兩倍以上。若(ruo)斷(duan)電(dian)(dian)時(shi)(shi)間(jian)(jian)(jian)(jian)或(huo)者焊接(jie)(jie)(jie)速度慢，可能因(yin)為分流作用，在焊接(jie)(jie)(jie)下一(yi)個點時(shi)(shi)，使前(qian)一(yi)個焊點再熔(rong)化，可能因(yin)為對該點已(yi)經不(bu)受(shou)壓(ya)力而(er)產生缺(que)陷(xian)。

  要想(xiang)得到致密的(de)(de)縫(feng)焊(han)(han)接(jie)(jie)頭，除應當選用(yong)(yong)合(he)適的(de)(de)焊(han)(han)接(jie)(jie)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流外(wai)，還要調整(zheng)焊(han)(han)接(jie)(jie)速度及通(tong)／斷(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)時(shi)間。要使焊(han)(han)點(dian)的(de)(de)重復量達到焊(han)(han)點(dian)直(zhi)徑的(de)(de)10%~25%。表(biao)3-33所示為奧氏體不(bu)銹鋼(gang)的(de)(de)焊(han)(han)接(jie)(jie)條件(jian)。由于不(bu)銹鋼(gang)的(de)(de)熱(re)(re)傳導不(bu)良及電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻率較大，所以，連續(xu)通(tong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)比斷(duan)續(xu)通(tong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)對(dui)母材的(de)(de)熱(re)(re)影(ying)響大，變(bian)形也大。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極材料適用(yong)(yong)RWMA的(de)(de)2級或(huo)3級，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極端部要平或(huo)者梯形。