Lwm yam cuam tshuam ntawm stainless hlau corrosion

Weld txaws
Vuam spatter muaj ntau yam ua rau cov txheej txheem vuam. Piv txwv li: GTAM (gas shielded tungsten arc vuam) los yog TIG (inert gas shielded tungsten vuam) tsis muaj txaws. Txawm li cas los xij, kev siv GMAW (gas shielded hlau arc vuam) thiab FCAW (arc welding nrog flux core) ob txoj kev vuam yuav ua rau muaj kev sib tsoo ntau yog tias cov vuam tsis raug siv tsis raug. Thaum qhov no tshwm sim, cov kev ntsuas yuav tsum tau kho. Yog tias koj xav daws qhov teeb meem ntawm vuam spatter, txhua sab ntawm qhov sib koom ua ke yuav tsum tau coated nrog anti-splash agent ua ntej vuam, uas tuaj yeem tshem tawm qhov adhesion ntawm cov txaws. Tom qab vuam, tus neeg sawv cev tiv thaiv kab mob no thiab ntau yam kab mob tuaj yeem raug tshem tawm yooj yim yam tsis muaj kev puas tsuaj rau saum npoo los yog ua rau muaj kev puas tsuaj me.
Vuam txheej txheem siv flux suav nrog phau ntawv welding, arc vuam nrog flux core thiab submerged arc vuam. Cov txheej txheem vuam no yuav tso cov khoom me me ntawm cov dej ntws tawm ntawm qhov chaw, uas tsis tuaj yeem raug tshem tawm los ntawm txoj kev ntxuav zoo tib yam. Cov khoom no yuav yog qhov chaw corrosion ntawm crevice corrosion thiab yuav tsum tau muab tshem tawm los ntawm kev tu txhua yam.
Weld defect
Welding defects xws li ntug tom, tsis tiav kev nkag mus, ntom porosity thiab cov kab nrib pleb tsis tsuas yog txo qhov ceev ntawm kev sib koom ua ke, tab sis kuj ua ib qho corrosion ntawm qhov sib txawv corrosion. Txhawm rau txhim kho qhov txiaj ntsig no, lawv kuj nkag mus rau cov khoom siv thaum lub sijhawm ntxuav. Cov teeb meem no tuaj yeem kho tau los ntawm kev rov vuam lossis rov vuam tom qab sib tsoo.
Roj thiab roj
Cov khoom siv organic xws li roj, roj thiab txawm tias cov ntiv tes luam tawm tuaj yeem dhau los ua qhov chaw ntawm corrosion hauv zos. Vim tias cov tshuaj no tuaj yeem ua rau muaj kev cuam tshuam, lawv tuaj yeem cuam tshuam cov tshuaj lom neeg thiab electrochemical tu, thiab yuav tsum tau muab tshem tawm kom huv si. ASTM A380 muaj qhov yooj yim WATERBREAK kuaj txhawm rau kuaj cov kab mob organic. Txhawm rau kuaj, dej yog nchuav los ntawm sab saum toj ntawm qhov ntsug, sib cais raws cov khoom siv organic thaum nws ntws. Fluxes thiab/los yog kua qaub tshuaj ntxuav cov roj stains thiab roj.
Residual nplaum
Thaum cov ntaub nplaum thiab daim ntawv tiv thaiv raug tshem tawm, ib feem ntawm cov nplaum ib txwm nyob ntawm qhov chaw stainless hlau. Yog tias cov nplaum tsis tawv, nws tuaj yeem raug tshem tawm nrog cov organic flux. Txawm li cas los xij, thaum raug lub teeb los yog huab cua, cov nplaum tawv tawv, ua kom muaj qhov sib txawv ntawm qhov sib txawv corrosion. Tom qab ntawd yuav tsum tau ntxuav cov tshuab ntxhua nrog nplua abrasives.
cwj mem impression
Cov teebmeem ntawm cov kab mob no zoo ib yam li cov roj thiab roj. Nws raug nquahu kom ntxuav nrog txhuam huv thiab dej huv lossis alkaline ntxuav, tab sis koj tuaj yeem siv cov dej kub siab lossis chav yaug. Stainless hlau nrog cov qauv ferritic feem ntau hauv kev siv. Chromium cov ntsiab lus nyob rau hauv 11% ~ 30%, nrog lub cev centered cubic siv lead ua qauv. Cov hlau no feem ntau tsis muaj npib tsib xee, thiab qee zaum muaj me me ntawm Mo, Ti, Nb thiab lwm yam, cov hlau no muaj cov thermal conductivity loj, me me expansion coefficient, zoo oxidation tsis kam, zoo heev kev nyuaj siab corrosion thiab lwm yam ntxwv. , thiab yog siv los tsim cov khoom tiv thaiv atmospheric, dej vapor, dej thiab oxidizing acid corrosion. Cov hlau no muaj qhov tsis zoo ntawm cov yas tsis zoo, plasticity thiab corrosion kuj tom qab vuam, uas txwv nws daim ntawv thov. Daim ntawv thov ntawm cov tshuab hluav taws xob ua kom zoo nkauj (AOD lossis VOD) tuaj yeem txo qhov sib txawv xws li carbon thiab nitrogen, kom cov hlau zoo li no tau siv dav.