1、銅及銅合金熔化極氬弧焊的焊接工藝。焊絲的選用 選用與鎢極氬弧焊相同的焊絲見表46。預熱及焊后熱處理 預熱溫度與鎢極氬弧焊相同。硅青銅、鈹青銅焊后應進行退火消除應力和500、保溫3h的時效硬化處理。熔滴過渡形式 滴狀和短路過渡適合于立焊和仰焊位置的焊接，噴射過渡適用于平焊和橫焊位置的焊接。熔滴由短路過渡轉變為噴射過渡的焊接工藝參數，見表49。表49 銅合金進入噴射過渡的焊接工藝參數焊絲材料焊絲直徑（mm）最小焊接電流（A）電弧電壓（V）送絲速度（m/min）最小電流密度（A/mm2）磷脫氧銅1.6310263.94168硅錳脫氧銅0.81.21.61802103102625268.756.353

2、.8229220316892/8錫青銅1.6270274.1813493/7鋁青銅0.81.21.61602102802525267.506.604.70260203139硅青銅0.81.21.6165205270242627272810.707.504.8226819913470/30銅-鎳1.6280264.45139焊接工藝參數 銅及銅合金熔化極氬弧焊的焊接工藝參數，見表50、表51。表50 純銅熔化極氬弧焊焊接工藝參數焊件厚度坡口形式及尺寸焊絲直徑（mm）焊接電流（A）電弧電壓（V）氬氣流量(L/min)層 數預熱溫度（形式間隙（mm）鈍邊（mm）角 度()3I01.630035025

3、30162015I011.635040025301620121006Y0370901.64004253234162022506I022.54504802530202511008Y021370902.54604803235253022503009Y02380902.550025302530225010Y02380902.5348050032352530240050012Y0380902.5355065028322530245050012雙Y022380901.6350400303525302435040015雙Y03302.53500600303525302445020Y122370804700

4、28302530236002230Y1212809047007503236304023600表51 銅合金熔化極氬弧焊焊接工藝參數材 料焊件厚度（mm）坡口形式焊絲直徑（mm）焊接電流（A）電弧電壓(V)送絲速度(mm/min)氬氣流量(L/min)備 注黃銅3I1.62752852528169Y1.627528525281612Y1.6275285252816錫青銅1.5I0.813014025263I1.014016026276Y1.016518527289Y1.62752852829預熱10015012Y1.63153352930預熱2002501823653853132252.5440

5、4603334鋁青銅3I1.62603002628206Y1.62.028032026284.55.5209Y1.630033026285.56.0202510雙Y4.04505503234502512Y1.632038026286.06.5303216雙Y2.54004402628303518Y1.632035026286.06.5303524雙Y2.545050028306.57.04045硅青銅3I1.62602702730166I1.6300320265.5169Y1.630027305.51612Y1.6310275.57.51620雙Y22.535038027301620白銅3I1.62802228166I1.62703302228169Y1.630