Thaum welding, lub hom phiaj yog los tsim kom muaj kev ruaj khov, seamless bond ntawm ob daim hlau.MIG welding yog txheej txheem ntau yam uas tuaj yeem siv los txuas ntau yam hlau sib txawv.MIG vuam yog txheej txheem zoo rau kev sib koom ua ke cov ntaub ntawv.Txawm li cas los xij, yog tias siv qhov chaw tsis raug, porosity tuaj yeem nkag mus rau hauv qhov vuam.Qhov no tuaj yeem ua rau muaj teeb meem nrog lub zog thiab kev ncaj ncees ntawm cov vuam.
Hauv no artical, peb yuav saib qee qhov ua rau porosity hauv MIG vuam thiab yuav tiv thaiv nws li cas.
Dab tsi ua rau Porosity hauv MIG Vuam?
Porosity yog ib hom vuam tsis xws luag uas tuaj yeem tshwm sim hauv welds.Nws zoo nkaus li qhov me me hauv qhov vuam thiab tuaj yeem ua rau tsis muaj zog ntawm kev sib txuas ntawm ob daim hlau.Porosity tuaj yeem tshwm sim los ntawm ntau yam, suav nrog:
1) Tsis tiav fusion
Qhov no tshwm sim thaum lub vuam arc tsis ua tiav cov hlau thiab cov khoom muab tub lim.Qhov no tuaj yeem tshwm sim yog tias lub tshuab vuam tsis tau teeb tsa rau qhov tseeb amperage lossis yog tias lub vuam vuam tsis tuav ze txaus rau cov hlau.
2) Cov pa roj tsis zoo
MIG welding siv cov roj thaiv kev tiv thaiv los tiv thaiv cov vuam los ntawm cov pa oxygen thiab lwm yam kab mob.Yog tias cov roj ntws tsawg dhau, porosity tuaj yeem tshwm sim.Qhov no tuaj yeem tshwm sim yog tias lub tshuab hluav taws xob tsis raug teeb tsa kom raug, lossis yog tias muaj cov xau hauv cov roj hose.
3) Gas nkag
Lwm qhov ua rau porosity yog gas entrapment.Qhov no tshwm sim thaum cov pa npuas ua rau hauv lub pas dej ua ke.Qhov no tuaj yeem tshwm sim yog tias lub teeb vuam tsis tuav ntawm lub kaum sab xis lossis yog tias muaj roj thaiv ntau dhau.
4) Av thiab kab mob
Porosity kuj tuaj yeem tshwm sim los ntawm kev sib kis ntawm cov hlau los yog cov khoom muab tub lim.Cov av, xeb, xim, thiab lwm yam kab mob tuaj yeem ua rau porosity.Qhov no tuaj yeem tshwm sim yog tias cov hlau tsis huv ua ntej vuam, lossis yog tias muaj xeb lossis pleev xim rau ntawm qhov chaw.Cov kab mob no tuaj yeem tiv thaiv qhov vuam los ntawm kev sib raug zoo rau cov hlau.
5) Tsis txaus shielding Gas
Lwm qhov ua rau porosity yog tsis txaus shielding roj.Qhov no tuaj yeem tshwm sim yog tias siv roj tsis raug rau cov txheej txheem vuam lossis yog tias cov roj ntws tsis raug teeb tsa raug.
Koj tuaj yeem tiv thaiv Porosity li cas tshwm sim thaum MIG Vuam txheej txheem?
Muaj ob peb yam uas koj tuaj yeem ua kom tsis txhob muaj qhov porosity tshwm sim thaum MIG vuam txheej txheem:
1. Siv cov kev teeb tsa kom raug: Nco ntsoov tias koj siv qhov chaw raug ntawm koj lub tshuab vuam.Lub amperage thiab voltage yuav tsum tau teem raws li cov neeg tsim khoom cov lus qhia.
2. Siv cov roj kom raug: Nco ntsoov siv cov roj kom raug rau koj cov txheej txheem vuam.Argon feem ntau yog siv rau MIG vuam.
3. Gas flow: Teem cov roj ntws raws li cov chaw tsim khoom cov lus qhia.Cov roj ntau dhau lossis tsawg dhau tuaj yeem ua rau porosity.
4. Khaws lub teeb ntawm lub kaum sab xis kom raug: Nco ntsoov tuav lub teeb ntawm lub kaum sab xis kom tsis txhob muaj roj nkag.Lub teeb yuav tsum tuav ntawm 10 mus rau 15-degree lub kaum sab xis ntawm qhov chaw ntawm cov hlau.
5. Siv cov hlau huv: Nco ntsoov siv cov hlau huv, tsis muaj paug rau koj qhov vuam.Txhua yam av, xeb, lossis pleev xim rau ntawm qhov chaw tuaj yeem ua rau porosity.
6. Weld nyob rau hauv ib qho chaw zoo: Weld nyob rau hauv ib tug zoo-ventilated cheeb tsam kom tsis txhob muaj gas entrapment.Shielding gas tuaj yeem raug kaw hauv qhov chaw kaw.
Porosity tuaj yeem tiv thaiv tau los ntawm kev ua raws li cov lus qhia no.Los ntawm kev siv cov kev teeb tsa kom raug thiab vuam nyob rau hauv qhov chaw muaj cua zoo, koj tuaj yeem zam qhov teeb meem no.
Cov Kev Kho Kom Zoo Rau Kev Kho Porosity Welds
Muaj ob peb txoj kev kho rau kev kho welds uas tau cuam tshuam los ntawm porosity:
1. Re-welding: Ib txoj hauv kev zoo tshaj plaws yog rov ua dua qhov chaw cuam tshuam.Qhov no tuaj yeem ua tiav los ntawm kev vuam hla thaj tsam cuam tshuam nrog ntau dua amperage.
2. Porosity plugs: Lwm txoj kev kho yog siv cov porosity plugs.Cov no yog cov hlau me me uas tau muab tso rau hauv lub qhov hauv qhov vuam.Porosity plugs tuaj yeem yuav ntawm cov khw muag khoom siv vuam feem ntau.
3. Sib tsoo: Lwm qhov kev xaiv yog zom tawm qhov chaw cuam tshuam thiab rov ua dua.Qhov no tuaj yeem ua tiav nrog lub tes tuav grinder lossis lub kaum sab xis grinder.
4. Vuam hlau: Lwm txoj kev kho yog siv vuam hlau.Qhov no yog ib txoj hlua nyias uas siv los sau cov qhov hauv qhov vuam.Vuam hlau tuaj yeem yuav ntawm ntau lub khw muag khoom siv vuam.
Cov porosity tuaj yeem kho tau los ntawm kev siv ib qho ntawm cov tshuaj no.Los ntawm re-welding cheeb tsam los yog siv cov porosity plugs, koj tuaj yeem kho qhov teeb meem.
Post lub sij hawm: Dec-23-2022