Pores nyob rau hauv weld seam yog ib qho teeb meem zoo thaum lub sij hawmneeg hlau vuam. Lub xub ntiag ntawm qhov hws tuaj yeem ua rau txo qis ntawm lub zog ntawm welds, thiab txawm ua rau tawg thiab tawg. Cov laj thawj tseem ceeb rau kev tsim cov pores hauv cov neeg hlau welds muaj xws li hauv qab no:
1. Kev tiv thaiv roj tsis zoo:
Thaum lub sij hawm vuam txheej txheem, cov khoom ntawm kev tiv thaiv gases (xws li argon, carbon dioxide, thiab lwm yam) tsis txaus los yog tsis sib xws, uas tsis zoo cais cov pa oxygen, nitrogen, thiab lwm yam nyob rau hauv cov huab cua, ua rau cov roj sib tov rau hauv lub melting pas dej ua ke. tsim ntawm pores.
2. Kev kho deg tsis zoo ntawm cov khoom siv vuam thiab cov ntaub ntawv hauv paus:
Muaj cov impurities xws li roj stains, xeb, noo noo, thiab oxide nplai rau ntawm qhov chaw ntawm cov khoom siv vuam lossis cov hlau hauv qab. Cov impurities no decompose nyob rau hauv siab vuam kub los tsim roj, uas nkag mus rau hauv lub molten pas dej ua ke thiab tsim pores.
3. Cov txheej txheem vuam tsis tsim nyog:
Yog tias qhov tam sim no, qhov hluav taws xob, thiab vuam ceev yog siab dhau los yog qis dhau, ua rau tsis txaus stirring ntawm lub pas dej ua ke thiab cov roj tsis muaj peev xwm khiav tau zoo; Los yog yog tias lub kaum sab xis ntawm cov roj tiv thaiv tsis tsim nyog, nws yuav cuam tshuam rau kev tiv thaiv roj.
4. Tsis tsim nyog weld tsim:
Yog hais tias qhov sib txawv ntawm cov weld seams loj heev, lub fluidity ntawm lub pas dej ua ke hlau tsis zoo, thiab cov pa roj yog qhov nyuaj rau tawm; Los yog cov duab ntawm weld seam yog complex, thiab roj tsis yooj yim rau kev khiav tawm ntawm qhov tob ntawm weld seam.
5. High humidity nyob rau hauv vuam ib puag ncig:
Cov dej noo nyob rau hauv cov huab cua decomposes rau hauv cov roj hydrogen ntawm qhov kub thiab txias, uas muaj cov solubility siab nyob rau hauv lub pas dej ua ke molten thiab tsis tuaj yeem khiav hauv lub sij hawm thaum lub sij hawm txias, tsim pores.
Cov kev ntsuas los daws qhov teeb meem ntawm porosity nyob rau hauv neeg hlau welds yog raws li nram no:
1. Optimize roj tiv thaiv:
Xyuas kom meej tias qhov purity ntawm cov roj tiv thaiv ua tau raws li tus qauv, tus nqi ntws yog nruab nrab, thiab qhov kev ncua deb ntawm lub nozzle thiab weld seam yog qhov tsim nyog, tsim kom muaj kev tiv thaiv huab cua zoo.
●Siv cov roj sib xyaw kom tsim nyog thiab sib tov sib xyaw, xws li siv qis lossis ultra-low hydrogen vuam rods thiab cov xov hlau, kom txo tau cov roj hydrogen.
2. Kev kho deg nruj:
Ua tib zoo ntxuav qhov chaw ntawm qhov chawcov khoom siv vuamthiab lub hauv paus hlau ua ntej welding, tshem tawm impurities xws li roj, xeb, thiab ya raws, thiab ua preheating kho yog tias tsim nyog.
Rau ib puag ncig uas muaj dej noo tuaj yeem tshwm sim thaum lub sijhawm vuam, ua kom qhuav, xws li siv lub tshuab ziab khaub ncaws los yog preheating lub workpiece.
3. Kho cov txheej txheem welding tsis:
Xaiv qhov tsim nyog tam sim no, qhov hluav taws xob, thiab vuam ceev raws li cov khoom siv vuam, cov khoom siv hauv paus, thiab vuam txoj hauj lwm kom ntseeg tau tias nruab nrab stirring thiab roj khiav lub sij hawm ntawm lub pas dej ua ke.
Kho lub tshuab lub kaum sab xis ntawm cov roj tiv thaiv kom ntseeg tau tias cov roj sib npaug npog lub vuam seam.
4. Txhim kho weld tsim:
Tswj lub weld seam sib txawv nyob rau hauv ib tug tsim nyog ntau yam kom tsis txhob loj dhau los yog me me.
Rau cov welds nyuaj, txoj kev xws li segmented vuam, preset muab tub lim hlau, los yog hloov cov vuam raws li yuav siv tau los txhim kho cov pa paug.
5. Tswj vuam ib puag ncig:
Sim weld nyob rau hauv ib qho chaw qhuav thiab zoo ventilated kom tsis txhob muaj av noo ntau.
Rau ib puag ncig uas cov av tsis tuaj yeem tswj tau, kev ntsuas xws li siv hygroscopics thiab vuam seam cua sov tuaj yeem txiav txim siab los txo qhov cuam tshuam ntawm cov dej noo.
6. Kev saib xyuas thiab kev tswj xyuas zoo:
Tsis tu ncua xyuas qhov kev ua tau zoo ntawm cov khoom siv vuam, xws li roj ntws ntsuas, vuam phom nozzles, thiab lwm yam, kom ntseeg tau tias lawv ua haujlwm zoo.
Kev saib xyuas lub sijhawm tiag tiag ntawm cov txheej txheem vuam, xws li siv cov txheej txheem vuam txheej txheem xyuas, txhawm rau tshawb xyuas tam sim thiab kho qhov txawv txav.
Ua qhov kev sim tsis muaj kev puas tsuaj (xws li kuaj ultrasonic, kuaj hluav taws xob, thiab lwm yam) tom qab vuam kom pom sai thiab kho cov welds uas muaj porosity. Kev siv dav dav ntawm cov kev ntsuas saum toj no tuaj yeem txo qhov tsim ntawm qhov pores hauv cov neeg hlau welds thiab txhim kho vuam zoo.
Qhov ua rau porosity nyob rau hauv cov neeg hlau welds muaj xws li deg paug ntawm cov khoom siv vuam, tsis muaj roj tiv thaiv, kev tswj tsis zoo ntawm vuam tam sim no thiab voltage, thiab vuam ceev heev. Yuav kom daws tau qhov teeb meem no, peb yuav tsum tau ua cov kev ntsuas sib xws, suav nrog kev siv cov khoom siv vuam huv, xaiv cov roj hmab tiv thaiv kom tsim nyog thiab tswj cov nqi ntws, teeb tsa cov vuam tsis tsim nyog, thiab tswj cov vuam ceev raws li qhov xwm txheej. Tsuas yog los ntawm ib txhij hais txog ntau yam tuaj yeem tiv thaiv thiab daws qhov teeb meem ntawm porosity hauv cov neeg hlau welds, thiab txhim kho vuam zoo.
Post lub sij hawm: Apr-07-2024
