焊接热输入培训课件

WeldingHeatinputtraining

焊接热输入培训ContentWhatisheatinput?什么是热输入？Howtocalculateheatinputofwelding?怎么计算热输入？Whatistheeffectonweldbyheatinput?热输入对焊缝的影响？Howtocontrolheatinput?怎样控制热输入？Whatisheatinput?/什么是热输入Heatinputisarelativemeasureoftheenergytransferredperunitlengthofweld.Itisanimportantcharacteristic,becauselikepreheatandinterpasstemperature,itinfluencesthecoolingrate,whichmayaffectthemechanicalpropertiesandmetallurgicalstructureoftheweldandtheHAZ.热输入是对焊缝每单位长度上能量转移的一种估量。它是一种非常重要的特性，因为像预热和层间温度，会影响冷却速率，这会影响焊缝和热影响区的机械性能和金属组织。Whatisheatinput?/什么是热输入HeatReasonTemperatureResultHowtocalculateheatinputofwelding?热输入的计算Heatinputistypicallycalculatedastheratioofthepower(i.e.,voltagexcurrent)tothevelocityoftheheatsource(i.e.,thearc)asfollows:热输入典型的计算方法如下所示：where,Q=Heatinput/热输入(KJ/cm)U=Arcvoltage/电压(Volts)I=Current/电流(Amps)Ts=Travelspeed/运条速度(cm/min)

HeatsourceHowtocalculateheatinputofwelding?热输入的计算Thelengthofweldforthecalculationofheatinput.热输入计算时的焊缝长度定义Howtocalculateheatinputofwelding?热输入的计算LowerHeatInput/低热输入I=100AU=14VTs=10cm/minHigherHeatInput/高热输入I=250AU=20VTs=5cm/min

Whatistheeffectonweldbyheatinput?热输入对焊缝的影响WPSHowtocalculateheatinputofwelding?热输入的计算LowerHeatInput/低热输入I=100AU=14VTs=10cm/minHigherHeatInput/高热输入I=250AU=20VTs=5cm/min

Whatistheeffectonweldbyheatinput?热输入对焊缝的影响Harmsofhigherheatinput/高热输入的危害Highhardness/硬度高Crack/裂纹Undercut/咬边Harmsoflowerheatinput/低热输入的危害Lackoffusion/未熔合Lackofpenetration/未熔透Slaginclusion/夹渣Howtocontrolheatinput?/怎样控制热输入QUESTION?Whatshouldwedotocontroltheheatinput?我们应该如何控制好热输入？Howtocontrolheatinput?/怎样控制热输入FollowtheWPS/按照WPS焊接SetyourweldingcurrentunderthescopeofWPS/按照WPS规定范围设置焊接电流SetyourweldingvoltageunderthescopeofWPS/按照WPS规定范围设置焊接电压Controlyoutravelspeedunderth