氬氣在焊接過程中的作用是什么?
氬(ya)氣(qi)(qi)(qi)在(zai)(zai)焊(han)接過(guo)程(cheng)中(zhong)主要(yao)起(qi)到保護(hu)作用。在(zai)(zai)氬(ya)弧(hu)焊(han)時,氬(ya)氣(qi)(qi)(qi)會在(zai)(zai)電弧(hu)周圍形成一層(ceng)(ceng)穩(wen)定(ding)的(de)保護(hu)氣(qi)(qi)(qi)層(ceng)(ceng)。這層(ceng)(ceng)氣(qi)(qi)(qi)層(ceng)(ceng)能夠有效(xiao)地隔(ge)絕空氣(qi)(qi)(qi)中(zhong)的(de)氧(yang)氣(qi)(qi)(qi)...