焊接熱輸入培訓課件

WeldingHeatinputtraining

焊接熱輸入培訓ContentWhatisheatinput?什么是熱輸入？Howtocalculateheatinputofwelding?怎么計算熱輸入？Whatistheeffectonweldbyheatinput?熱輸入對焊縫的影響？Howtocontrolheatinput?怎樣控制熱輸入？Whatisheatinput?/什么是熱輸入Heatinputisarelativemeasureoftheenergytransferredperunitlengthofweld.Itisanimportantcharacteristic,becauselikepreheatandinterpasstemperature,itinfluencesthecoolingrate,whichmayaffectthemechanicalpropertiesandmetallurgicalstructureoftheweldandtheHAZ.熱輸入是對焊縫每單位長度上能量轉移的一種估量。它是一種非常重要的特性，因為像預熱和層間溫度，會影響冷卻速率，這會影響焊縫和熱影響區(qū)的機械性能和金屬組織。Whatisheatinput?/什么是熱輸入HeatReasonTemperatureResultHowtocalculateheatinputofwelding?熱輸入的計算Heatinputistypicallycalculatedastheratioofthepower(i.e.,voltagexcurrent)tothevelocityoftheheatsource(i.e.,thearc)asfollows:熱輸入典型的計算方法如下所示：where,Q=Heatinput/熱輸入(KJ/cm)U=Arcvoltage/電壓(Volts)I=Current/電流(Amps)Ts=Travelspeed/運條速度(cm/min)

HeatsourceHowtocalculateheatinputofwelding?熱輸入的計算Thelengthofweldforthecalculationofheatinput.熱輸入計算時的焊縫長度定義Howtocalculateheatinputofwelding?熱輸入的計算LowerHeatInput/低熱輸入I=100AU=14VTs=10cm/minHigherHeatInput/高熱輸入I=250AU=20VTs=5cm/min

Whatistheeffectonweldbyheatinput?熱輸入對焊縫的影響WPSHowtocalculateheatinputofwelding?熱輸入的計算LowerHeatInput/低熱輸入I=100AU=14VTs=10cm/minHigherHeatInput/高熱輸入I=250AU=20VTs=5cm/min

Whatistheeffectonweldbyheatinput?熱輸入對焊縫的影響Harmsofhigherheatinput/高熱輸入的危害Highhardness/硬度高Crack/裂紋Undercut/咬邊Harmsoflowerheatinput/低熱輸入的危害Lackoffusion/未熔合Lackofpenetration/未熔透Slaginclusion/夾渣Howtocontrolheatinput?/怎樣控制熱輸入QUESTION?Whatshouldwedotocontroltheheatinput?我們應該如何控制好熱輸入？Howtocontrolheatinput?/怎樣控制熱輸入FollowtheWPS/按照WPS焊接SetyourweldingcurrentunderthescopeofWPS/按照WPS規(guī)定范圍設置焊接電流SetyourweldingvoltageunderthescopeofWPS/按照WPS規(guī)定范圍設置焊接電壓Controlyoutravelspeedunderth