Vuam txhais tau tias rau vuam cov ntaub ntawv nyob rau hauv cov kev cai rau kev tsim kho ntawm ib tug tswv cuab raws li cov kev cai tsim, thiab muaj peev xwm ua tau raws li qhov yuav tsum tau ntawm cov kev pab cuam predetermined.Los ntawm cov khoom siv vuam, vuam, cov khoom siv thiab kev siv cov kev xav tau cuam tshuam rau plaub yam.

Tsawg carbon steel welding
Vim tias cov ntsiab lus ntawm cov pa roj carbon tsawg (piv txwv li: carbon steel yeeb nkab), manganese, silicon cov ntsiab lus tsawg dua, yog li feem ntau yuav tsis muaj qhov vuam loj quench hardened cov ntaub so ntswg.Tsawg carbon steel weld pob qij txha plasticity thiab cuam tshuam toughness yog zoo, vuam, feem ntau tsis preheating, tswj qhov kub thiab txias ntawm cov khaubncaws sab nraud povtseg, siv tom qab vuam kub kho tsis txhim kho lub koom haum, tag nrho cov txheej txheem yuav tsum tsis txhob siv tshwj xeeb vuam txheej txheem ntsuas, weldability.

Nruab nrab carbon steel vuam
Carbon loj feem ntawm 0.25% ~ 0.60% rau nruab nrab carbon steel.Thaum cov feem loj ntawm cov pa roj carbon thiab manganese cov ntsiab lus ntawm ze li ntawm 0.25% tsis siab, weldability zoo.Nrog rau qhov nce ntawm cov ntsiab lus carbon, weldability maj mam deteriorated.Yog tias cov ntsiab lus carbon yog li 0.45%, thaum ua raws li cov txheej txheem welding me me steel vuam siv thaum nyob rau hauv thaj chaw tshav kub cuam tshuam tuaj yeem tsim cov martensite nkig, yooj yim rau tawg, uas tsim cov khaub thuas tawg.Thaum welding, tus nqi ntawm cov khoom siv hauv paus yog melted rau hauv vuam, lub vuam kom cov pa roj carbon ntau ntxiv, los txhawb thermal cracking nyob rau hauv vuam, tshwj xeeb tshaj yog thaum nruj tswj impurities ntawm leej faj, yuav ntau dua.Qhov no tawg yog ntau rhiab heev nyob rau hauv lub crater ntawm kev faib ntawm tshav kub nyob rau hauv lub weld cracking thiab scaly li wavy kab perpendicular rau lub weld.

High carbon steel vuam
Thaum lub siab-carbon steel cov ntsiab lus ntau dua 0.60%, hardening, vuam tawg rhiab heev tom qab lub siab nyiam ntau dua thiab yog li tsis zoo weldability, tsis tuaj yeem siv rau hauv kev tsim cov khoom siv welded.Yuav tsum tau siv ntau dua hauv kev tsim cov hardness lossis abrasion ntawm cov khoom thiab cov khoom siv, cov vuam ua haujlwm feem ntau yog vuam kho.Vim yog lub zog tensile siab carbon steel feem ntau nyob rau hauv 675MPa lossis ntau dua, yog li cov qauv electrode E7015, E6015, tuaj yeem xaiv E5016, E5015 electrode qauv thaum cov tswv cuab thov ntau.Tsis tas li ntawd, peb tuaj yeem siv chrome-nickel austenitic steel electrodes rau vuam.Vim muaj cov pa roj carbon siab nyob rau hauv thiaj li yuav tau txais siab hardness thiab hnav tsis kam, cov khoom nws tus kheej raug rau kev kho cua sov, vuam yuav tsum tau ua ntej los ntawm annealing nws yuav tsum tau welded.Yuav tsum tau nqa tawm ua ntej welding preheat, qhov preheat kub feem ntau yog siab tshaj 250 ~ 350 ℃, welding txheej txheem yuav tsum tsis txhob qis dua qhov kub ntawm lub tuav txheej ntawm lub preheating kub.Weldments tom qab vuam yuav tsum tau ua kom txias txias thiab tam sim ntawd mus rau hauv lub cub tawg ntawm 650 ℃ rau kev ntxhov siab rau kev kho cua sov.