Preheating Ua ntej Vuam
Ua ntej vuamASTM A588 Corten Phaj, lub workpiece yuav tsum tau preheated rau ib tug kub ntawm350℃thiab 400 degree. Preheating pab txo qhov kub sib txawv ntawm qhov chaw welded thiab ib puag ncig hlau.
Qhov no ua rau muaj kev sib txawv ntau dua thiab kev sib cog lus tom qab vuam, txo qhov kev ntxhov siab ntawm vuam thiab txo qhov cuam tshuam.
Cua sov "Stress Relief Zone"
Nyob rau hauv welding qauv ua los ntawmASTM A588 Corten Phaj, xaiv qhov tsim nyog rau preheating tuaj yeem txo qhov kev ntxhov siab ntawm vuam. Cov chaw cua sov xaiv no yog hu ua "cov cheeb tsam kev ntxhov siab."
Piv txwv li, thaum vuam qhov tawg ntawm ib tug ncej, cua sov nruab nrab ntawm tus ncej sab laug thiab txoj cai rods ua ntej welding yuav elongate lawv thiab ua rau deformation nyob rau hauv lub opposite kev taw qhia ntawm vuam seam contraction.
Thaum lub sij hawm txias, ob qho tib si rhuab cheeb tsam thiab weld seam daim ntawv cog lus ua ke, txo cov kev txwv ntawm lub weld tsis pub contraction thiab txo cov vuam kev nyuaj siab.
Rov qab Deformation Method
Txoj kev thim rov qab deformation suav nrog suav lossis kwv yees qhov xav tau deformation loj thiab kev taw qhia ntawmASTM A588 Corten Phajtom qab vuam. Ua ntej sib dhos, tso lub workpiece nyob rau hauv qhov kev taw qhia ntawm qhov xav tau vuam deformation.
Qhov no tuaj yeem ua tiav raws li kev suav los yog kev ua tau zoo. Xwb, ua ntej- deforming lub workpiece nyob rau hauv lub opposite kev taw qhia kom counterbalance lub deformation tom qab vuam yuav pab tau kom muaj qhov seem stability.
Rigid Clamping Method
Txoj kev nruj clamping siv clamps los yog qhov chaw vuam txwv tsis pub vuam deformation. Txoj kev no muaj txiaj ntsig zoo hauv kev tiv thaiv angular distortion thiab wavy deformation ntawm nyiasASTM A588 Corten Phajcov qauv.
Txawm li cas los xij, nruj clamping tsuas yog tsim nyog rau cov khoom siv nrog cov yas zoo, thiab cov khoom ua haujlwm yuav tsum tau muab tshem tawm sai sai tom qab vuam kom txo tau cov kev ntxhov siab sab hauv.
Txoj kev no yuav tsum tsis txhob siv rau ntawm cov ntaub ntawv uas tsis zoo plasticity, xws li steels nrog siab hardenability lossis cam khwb cia hlau, vim nws yuav ua rau tawg tom qab vuam.
Tshaj tawm -Kev kho cua sov
Tom qab- vuam kev kho cua sov, tshwj xeeb tshaj yog kev ntxhov siab- nyem annealing, yog qhov tseem ceeb los tshem tawm cov kev ntxhov siab welding seem. Yuav kom ua tiav qhov no, lub workpiece yog uniformly rhuab mus rau600℃- 650 degree, tuav ntawm qhov kub no rau ib lub sijhawm, thiab maj mam txias.
High -kub tempering yog txoj kev zoo tshaj plaws los tshem tawm cov kev ntxhov siab welding, feem ntau tshem tawm80-90%ntawm cov residual stresses nyob rau hauv cov khoom.