Galvanized steel kav, uas muaj ob qhov zoo ntawm kev tiv thaiv corrosion thiab lub neej ntev kev pab cuam, thiab tus nqi kuj tsawg, yog li tam sim no nws cov nqi siv tau nce siab dua, tab sis qee zaum nws tsis tau them nyiaj rau thaum welded nrog zinc galvanized yeeb nkab. , uas ua rau ib txhia ua rau ib txhia, uas ua rau ib txhia, uas ua rau ib txhia. Cov teeb meem tsis tsim nyog, yog li cov teeb meem dab tsi yuav tsum tau them rau thaum vuam?
1. Lub hauv paus yog polished
Galvanize lub vuam ntawm qhov vuam ntawm qhov vuam, txwv tsis pub nws yuav ua npuas, trachoma, vuam vuam, thiab lwm yam. Nws tseem yuav ua rau cov welds crispy thiab nruj.
2. Welding yam ntxwv ntawm galvanized hlau
Galvanized steel feem ntau muab tso nrog zinc ntawm cov pa roj carbon tsawg, thiab txheej txheej galvanized feem ntau yog 20um tuab. Lub melting point ntawm zinc yog 419 ° C, thiab lub boiling point yog hais txog 908 ° C. Thaum lub sij hawm welding, zinc melted rau hauv cov kua floating nyob rau saum npoo ntawm lub tank molten los yog nyob rau hauv lub hauv paus ntawm weld. Zinc muaj cov tshuaj loj loj hauv cov hlau. Zinc kua yuav sib sib zog nqus cov hlau welded raws li tus ciam teb siv lead ua, thiab qis melting point zinc ua "kua hlau crisp".
Nyob rau tib lub sijhawm, zinc thiab hlau tuaj yeem tsim cov hlau crispy compound. Cov theem crispy no txo cov plasticity ntawm cov hlau vuam thiab cov kab nrib pleb nyob rau hauv qhov kev txiav txim ntawm tensile kev nyuaj siab. Yog hais tias lub kaum sab xis vuam, tshwj xeeb tshaj yog lub kaum vuam ntawm T-shaped sib koom ua ke, nws yooj yim nkag mus rau cov kab nrib pleb. Thaum lub sij hawm welding ntawm galvanized steel, zinc txheej nyob rau saum npoo thiab cov npoo ntawm lub ramp yog nyob rau hauv qhov kev txiav txim ntawm arc thermal fever, uas ua rau oxidation, melting, evaporation thiab txawm volatilization ntawm dawb pa luam yeeb thiab chav, uas yuav yooj yim ua rau welded cua qhov. .
Lub ZNO tsim los ntawm oxidation muaj lub siab melting point, txog 1800 degree C. Yog hais tias qhov tsis muaj me me thaum lub sij hawm vuam txheej txheem, ZnO residue yuav tshwm sim, thiab nyob rau tib lub sij hawm. Txij li Zn dhau los ua tus deoxyer. Tsim Feo-Mno lossis Feo-Mno-SIO2 qis melting point oxide slag. Qhov thib ob, vim yog cov evaporation ntawm zinc, ntau cov pa luam yeeb dawb thiab plua plav yog evaporated, uas muaj kev txhawb zog thiab kev puas tsuaj rau tib neeg lub cev. Yog li ntawd, txheej galvanized ntawm qhov chaw vuam yog polished.
3. Welding txheej txheem tswj
Kev npaj ua ntej-welding ntawm galvanized steel yog tib yam li cov hlau tsis tshua muaj-carbon. Nws yuav tsum tau muab sau tseg tias qhov luaj li cas ntawm txoj kab nqes thiab nyob ze galvanized txheej yuav tsum tau ua tib zoo saib xyuas. Txhawm rau welding, qhov loj ntawm qhov slopes yuav tsum tsim nyog, feem ntau 60 ~ 65 degree, thiab yuav tsum muaj qhov sib txawv, feem ntau 1.5 ~ 2.5mm; txhawm rau txo cov kev nkag mus ntawm zinc rau welded seams, ua ntej welding Vuam tom qab txheej yog tshem tawm.
Vuam txoj kev: Thaum welding thawj txheej ntawm welded welding, zinc txheej yog melted thiab vaporized, evaporated thiab welds tuaj yeem txo qis, uas tuaj yeem txo cov kua zinc hauv cov vuam zoo heev. Thaum welding welds welded, sim yaj cov zinc txheej thiab vaporize, evaporate thiab sib haum xeeb welded seams ntawm thawj txheej. Tom qab melting, rov qab mus rau qhov qub chaw thiab txuas ntxiv mus rau welded rau pem hauv ntej. Thaum vuam thiab sawv welded, yog hais tias lub slag luv luv vuam, xws li J427, qhov tom yuav me me; Yog tias koj siv lub hauv ntej thiab sab nraub qaum ntawm cov tuav, koj tuaj yeem tau txais qhov tsis zoo ntawm vuam zoo.
