Galvanized steel feem ntau yog txheej zinc coated rau sab nraud ntawm cov hlau tsis tshua muaj hlau, thiab zinc txheej feem ntau yog 20μm tuab. Lub melting point ntawm zinc yog 419 ° C thiab lub boiling point yog hais txog 908 ° C.
Lub vuam yuav tsum tau polished ua ntej vuam
Cov txheej galvanized ntawm lub vuam yuav tsum tau polished, txwv tsis pub npuas, xuab zeb qhov, cuav vuam, thiab lwm yam yuav raug generated. Nws tseem yuav ua rau cov weld brittle thiab txo rigidity.
Kev txheeb xyuas cov yam ntxwv ntawm galvanized steel vuam
Thaum lub sij hawm vuam, zinc melts rau hauv cov kua thiab ntab rau saum npoo ntawm lub pas dej molten los yog ntawm lub hauv paus ntawm lub weld. Zinc muaj cov khoom solubility loj hauv hlau. Cov zinc ua kua yuav ua rau cov hlau sib sib zog nqus ntawm cov ciam teb, thiab cov zinc qis-melting-point zinc yuav tsim "kua hlau embrittlement".
Nyob rau tib lub sijhawm, zinc thiab hlau tuaj yeem tsim cov khoom sib txuas sib txuas. Cov theem nkig no txo cov plasticity ntawm cov hlau vuam thiab tsim cov kab nrib pleb nyob rau hauv tensile kev nyuaj siab.
Vuam fillet welds, tshwj xeeb tshaj yog fillet welds ntawm T-joints, feem ntau yuav tsim los ntawm cov kab nrib pleb. Thaum galvanized hlau yog welded, zinc txheej ntawm qhov zawj thiab ntug yuav oxidize, yaj, evaporate nyob rau hauv qhov kev txiav txim ntawm arc tshav kub, thiab volatilize dawb pa luam yeeb thiab chav, uas yuav yooj yim ua rau weld porosity.
ZnO tsim los ntawm oxidation muaj lub siab melting point, siab tshaj 1800 ° C. Yog tias qhov ntsuas me me dhau thaum vuam, ZnO slag suav nrog yuav tshwm sim. Nyob rau tib lub sijhawm, txij li Zn dhau los ua deoxidizer, FeO-MnO lossis FeO-MnO-SiO2 qis melting point oxide slag suav nrog yuav raug tsim tawm. Qhov thib ob, vim yog cov evaporation ntawm zinc, ntau cov pa luam yeeb dawb yuav volatilized, uas yuav ua rau mob thiab ua mob rau tib neeg lub cev. Yog li ntawd, txheej galvanized ntawm qhov chaw vuam yuav tsum tau polished.
Xinfa vuam cov cuab yeej muaj cov yam ntxwv zoo thiab tus nqi qis. Yog xav paub ntxiv, thov mus saib:Vuam & txiav Manufacturers - Tuam Tshoj Vuam & Txiav Hoobkas & lwm tus neeg (xinfatools.com)
Yuav tswj cov txheej txheem galvanized steel li cas?
Lub pre-welding npaj ntawm galvanized steel yog tib yam li cov uas tsis tshua muaj carbon steel. Nws yog ib qho tseem ceeb kom ua tib zoo tuav qhov zawj loj thiab cov txheej galvanized nyob ze. Txhawm rau vuam, qhov zawj loj yuav tsum tsim nyog, feem ntau 60 ° ~ 65 °. Ib qho kev sib txawv yuav tsum tau sab laug, feem ntau 1.5 ~ 2.5mm. Txhawm rau txo qhov kev nkag mus ntawm zinc rau hauv qhov vuam, txheej txheej galvanized hauv qhov zawj tuaj yeem raug tshem tawm ua ntej vuam.
Hauv kev saib xyuas tiag tiag, kev ua haujlwm hauv nruab nrab ntawm qhov zawj thiab tsis muaj cov txheej txheem blunt ntug yog siv rau kev tswj hwm hauv nruab nrab. Cov txheej txheem vuam ob txheej yuav txo tau qhov ua tiav vuam tsis tiav.
Lub vuam pas nrig yuav tsum raug xaiv raws li cov khoom siv hauv paus ntawm cov yeeb nkab galvanized. Feem ntau, J422 feem ntau yog siv rau cov pa roj carbon tsawg vim kev ua haujlwm yooj yim.
Vuam txheej txheem: Thaum welding thawj txheej ntawm ntau txheej welds, sim yaj cov zinc txheej thiab vaporize thiab evaporate nws kom dim ntawm weld, uas tuaj yeem txo qhov teeb meem ntawm cov kua zinc tshuav hauv cov vuam.
Thaum welding fillet welds, sim yaj cov zinc txheej hauv thawj txheej thiab ua kom nws vaporize thiab evaporate kom dim ntawm qhov vuam. Cov txheej txheem yog thawj zaug txav mus rau qhov kawg ntawm cov electrode rau pem hauv ntej txog 5 ~ 7mm, thiab rov qab mus rau qhov qub thiab txuas ntxiv vuam rau pem hauv ntej tom qab zinc txheej melts.
Hauv kab rov tav thiab ntsug welding, yog siv cov slag electrodes luv luv xws li J427, qhov kev sib tsoo ntawm ntug yuav me me heev. Yog tias siv cov cuab yeej siv hluav taws xob rov qab thiab sab nraud, nws yuav muaj peev xwm tau txais cov txiaj ntsig tsis muaj qhov tsis xws luag.
Post lub sij hawm: Sep-05-2024
