Vuam yog ib kauj ruam tseem ceeb hauv kev tsim ASTM A242 Hom 1 Corten Steel rau cov haujlwm tsim thiab sab nraum zoov, thiab ntau tus neeg tsim khoom sib koom nrog cov lus nug: Puas yog preheating yuav tsum ua ntej vuam cov khoom no? Puas yuav hla nws ua rau cov hlau tsis muaj zog lossis tsis muaj zog welds? Puas yog nws cov alloy muaj pes tsawg leeg xav tau cov cua sov tshwj xeeb? Lub ntsiab lus teb yog qhov tseeb:ASTM A242 Hom 1 Corten Steel tsis tas yuav tsum tau ua kom sov hauv feem ntau -tsuas yog nyob rau hauv cov xwm txheej tshwj xeeb uas muaj cov phaj tuab lossis txias txias. Hauv qab no yog cov lus qhia ntxaws ntxaws kom tsis txhob ua haujlwm tsis tsim nyog thiab ua kom muaj zog, ruaj khov welds.
Thaum Preheating tsis tsim nyog (feem ntau cov xwm txheej)
Rau feem ntau ntawm cov haujlwm uas siv ASTM A242 Hom 1, preheating yog nkim sijhawm thiab ua haujlwm. Nov yog thaum koj tuaj yeem hla nws:
Phaj Tsawg dua los yog sib npaug li 20 hli tuab: Qhov no yog qhov ntau tshaj plaws thickness ntau rau architectural thiab lub teeb structural tej yaam num (xws li, railings, facades). Cov hlau sib npaug ntawm cov hlau sib xyaw (tooj liab, chromium, npib tsib xee) ua kom zoo weldability yam tsis muaj preheating.
Vuam nyob rau hauv qhov kub thiab txias: Thaum ua hauj lwm nyob rau hauv ib puag ncig saum toj no 10℃(50 ℉), cov hlau khaws cia txaus ambient kub los tiv thaiv kom txhob txias sai thiab tawg.
Standard vuam txoj kev: MIG, TIG, thiab shielded hlau arc vuam (SMAW) ua hauj lwm zoo yam tsis muaj preheating rau feem ntau ASTM A242 hom 1 daim ntaub ntawv.
Thaum Preheating yuav tsum tau (Tshwj xeeb Case)
Preheating yuav tsum tau tsuas yog los tiv thaiv weld cracking thiab tswj kev ncaj ncees nyob rau hauv cov xwm txheej no:
Cov phaj tuab (＞ 20mm): Cov ntaub ntawv tuab khaws cov cua sov ntau dua thaum vuam, ua rau kom txias sai tom qab vuam. Preheating slows cov txheej txheem no, txo qhov kev pheej hmoo ntawm cov kab nrib pleb.
Txias vuam tej yam kev mob: Thaum ua hauj lwm nyob rau hauv kub qis dua 10℃(50℉), tshwj xeeb tshaj yog nyob rau hauv cov huab cua txias (txog -10℃/-14℉ qhov twg ASTM A242 Hom 1 ua tau zoo), preheating tiv thaiv brittleness nyob rau hauv lub vuam sib txuas.
High-kev ntxhov siab welds: Rau cov qauv siv vuam tseem ceeb (xws li, thauj khoom- cov kabmob txhawb nqa), kev ua kom sov ua kom muaj kev ntxhov siab sab hauv, ua kom cov vuam tuaj yeem tiv taus ntev - siv sijhawm.
Cov txheej txheem Preheating kom raug (yog tias xav tau)
Thaum yuav tsum tau preheating, ua raws li cov yooj yim no, kev lag luam -tus qauv cov kauj ruam kom tsis txhob ua puas cov hlau:
Lub hom phiaj kub: Preheat rau 60–100℃(140–212℉)-tsis siab dua. Cov cua kub ntau dhau tuaj yeem ua rau cov hlau tsis muaj zog thiab cuam tshuam nws lub peev xwm los tsim kev tiv thaiv patina.
Cov txheej txheem cua sov: Siv lub teeb hluav taws xob propane lossis hluav taws xob cua sov daim pam rau cov cua sov sib xws. Tsom ntsoov rau thaj tsam 50-100mm nyob ib ncig ntawm qhov sib koom ua ke kom ntseeg tau tias qhov kub thiab txias.
Tshaj tawm -weld care: Cia lub vuam kom txias li qub. Tsis txhob yuam kom txias (piv txwv li, cov tshuaj tsuag dej), uas tuaj yeem ua rau tawg thiab cuam tshuam lub vuam lub zog.
Ntsiab Vuam Ntsis rau Complement Preheating
Txawm hais tias yuav tsum tau ua kom sov ua ntej lossis tsis xav tau, ib txwm siv Corten- siv vuam electrodes (xws li E7018 rau SMAW, ER70S-6 rau MIG). Qhov no phim cov hlau alloy muaj pes tsawg leeg, kom ntseeg tau tias cov weld khaws tib yam corrosion kuj thiab lub zog raws li cov khoom siv hauv paus.
Hauv luv luv, ASTM A242 Hom 1 Corten Steel yog ib qho yooj yim rau vuam yam tsis muaj preheating rau feem ntau cov haujlwm. Preheating tsuas yog yuav tsum tau ua rau cov phaj tuab, txias txias, lossis siab -kev nyuaj siab welds- ua raws li cov lus qhia no ua kom muaj zog, corrosion-cov txiaj ntsig tiv taus nrog kev ua haujlwm tsawg tsawg.
