铜及铜合金熔化极氩弧焊的焊接工艺

1、铜及铜合金熔化极氩弧焊的焊接工艺。焊丝的选用 选用与钨极氩弧焊相同的焊丝见表46。预热及焊后热处理 预热温度与钨极氩弧焊相同。硅青铜、铍青铜焊后应进行退火消除应力和500、保温3h的时效硬化处理。熔滴过渡形式 滴状和短路过渡适合于立焊和仰焊位置的焊接，喷射过渡适用于平焊和横焊位置的焊接。熔滴由短路过渡转变为喷射过渡的焊接工艺参数，见表49。表49 铜合金进入喷射过渡的焊接工艺参数焊丝材料焊丝直径（mm）最小焊接电流（A）电弧电压（V）送丝速度（m/min）最小电流密度（A/mm2）磷脱氧铜1.6310263.94168硅锰脱氧铜0.81.21.61802103102625268.756.353

2、.8229220316892/8锡青铜1.6270274.1813493/7铝青铜0.81.21.61602102802525267.506.604.70260203139硅青铜0.81.21.6165205270242627272810.707.504.8226819913470/30铜-镍1.6280264.45139焊接工艺参数 铜及铜合金熔化极氩弧焊的焊接工艺参数，见表50、表51。表50 纯铜熔化极氩弧焊焊接工艺参数焊件厚度坡口形式及尺寸焊丝直径（mm）焊接电流（A）电弧电压（V）氩气流量(L/min)层 数预热温度（形式间隙（mm）钝边（mm）角 度()3I01.630035025

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

4、28302530236002230Y1212809047007503236304023600表51 铜合金熔化极氩弧焊焊接工艺参数材 料焊件厚度（mm）坡口形式焊丝直径（mm）焊接电流（A）电弧电压(V)送丝速度(mm/min)氩气流量(L/min)备 注黄铜3I1.62752852528169Y1.627528525281612Y1.6275285252816锡青铜1.5I0.813014025263I1.014016026276Y1.016518527289Y1.62752852829预热10015012Y1.63153352930预热2002501823653853132252.5440

5、4603334铝青铜3I1.62603002628206Y1.62.028032026284.55.5209Y1.630033026285.56.0202510双Y4.04505503234502512Y1.632038026286.06.5303216双Y2.54004402628303518Y1.632035026286.06.5303524双Y2.545050028306.57.04045硅青铜3I1.62602702730166I1.6300320265.5169Y1.630027305.51612Y1.6310275.57.51620双Y22.535038027301620白铜3I1.62802228166I1.62703302228169Y1.630