7 Hom kev tsis haum thiab tiv thaiv kev ntsuas hauv Aluminium Alloy Vuam

1. Vuam porosity

Thaum lub sij hawm vuam, lub pores tsim los ntawm cov npuas seem nyob rau hauv lub molten pas dej ua ke uas tsis khiav thaum lub sij hawm solidification.

Yog vim li cass:

1) Qhov saum npoo ntawm cov khoom siv hauv paus lossis cov khoom siv vuam hlau yog kis nrog cov roj, cov oxide zaj duab xis tsis raug ntxuav kom huv, lossis vuam tsis ua raws sijhawm tom qab ntxuav.

2) Lub purity ntawm cov roj tiv thaiv tsis yog siab txaus, thiab cov nyhuv tiv thaiv tsis zoo.

3) Cov khoom siv roj av tsis qhuav los yog xau cua lossis dej.

4) Kev xaiv tsis raug ntawm cov txheej txheem vuam tsis raug.

5) Kev tiv thaiv roj tsis zoo thaum lub sij hawm vuam thiab vuam ceev heev.

Kev tiv thaiv:

1) Ua tib zoo ntxuav qhov chaw vuam thiab vuam hlau ua ntej vuam.

2) Cov roj tiv thaiv tsim nyog yuav tsum tau siv, thiab purity yuav tsum ua raws li cov lus qhia tshwj xeeb.

3) Cov khoom siv roj yuav tsum tau qhuav kom tsis txhob muaj cua thiab dej ntws tawm.

4) Kev xaiv cov txheej txheem vuam yuav tsum tsim nyog.

5) Ua tib zoo saib xyuas qhov tseeb ntawm txoj haujlwm vuam, vuam hlau, thiab cov khoom ua haujlwm, thiab vuam teeb yuav tsum yog qhov sib npaug ntawm qhov chaw ua haujlwm;

Sim siv luv luv arc vuam, thiab qhov kev ncua deb ntawm lub nozzle thiab lub workpiece yuav tsum tau tswj ntawm 10-15 hli;

Lub vuam vuam yuav tsum txav ntawm qhov ceev tsis tu ncua ntawm txoj kab ncaj nraim, thiab cov tungsten electrode yuav tsum tau ua raws li qhov nruab nrab ntawm qhov vuam seam, thiab cov hlau yuav tsum tau muab rov qab los ntawm qhov ceev tsis tu ncua;

Yuav tsum muaj cov khoom siv windproof ntawm qhov chaw vuam, thiab yuav tsum tsis muaj cua nkag.

welded qhov chaw yuav tsum tau preheated kom tsim nyog; Ua tib zoo saib xyuas qhov zoo ntawm arc pib thiab txiav tawm.

 

2. Tsis muaj kev nkag mus thiab fusion

Qhov tshwm sim ntawm kev nkag tsis tiav thaum lub vuam yog hu ua incomplete penetration.

Qhov chaw uas cov hlaws hlaws tsis tag nrho yaj thiab daim ntawv cog lus nrog lub hauv paus hlau lossis nruab nrab ntawm cov hlaws hlaws thaum vuam yog hu ua tsis tiav fusion.

Yog vim li cass:

1) Lub vuam tam sim no tswj tau qis dhau, qhov arc ntev dhau lawm, qhov vuam ceev nrawm dhau, thiab qhov kub ntawm qhov ntsuas kub qis.

2) Lub weld seam qhov sib txawv me dhau lawm, lub ntsej muag blunt loj dhau, thiab lub zawj lub kaum sab xis me dhau.

3) Kev tshem tawm oxide nyob rau saum npoo ntawm cov khoom siv welded thiab nruab nrab ntawm cov txheej vuam tsis huv.

4) Tsis muaj kev txawj ntse hauv kev ua haujlwm, tsis tuaj yeem tuav lub sijhawm zoo ntawm kev pub hlau.

Kev tiv thaiv:

1) Xaiv qhov tseeb vuam tam sim no tsis. Thaum welding tuab daim hlau, preheat lub workpiece rau 80-120 ℃ ua ntej welding los xyuas kom meej tias lub workpiece kub raws li qhov yuav tsum tau welding.

2) Xaiv qhov tsim nyog vuam sib txuas qhov khoob thiab zawj cov ces kaum.

3) Txhim kho kev tu cov oxides ntawm qhov chaw ntawm cov khoom siv welded thiab nruab nrab ntawm cov txheej txheem vuam.

4) Kev siv lub tshuab ua kom muaj zog vuam yuav tsum raug txiav txim siab qhov xwm txheej ntawm qhov zawj lossis vuam txheej txheej, thiab siv cov tam sim no siab (feem ntau, ib qho me me ntawm lub pas dej huv thiab ci ntsa iab yuav tsum tau txais ntawm qhov chaw vuam hauv 5 vib nas this tom qab arc ignition, thiab hlau welding tuaj yeem muab ntxiv rau lub sijhawm no) kom nrawm nrawm thiab nrawm nrawm nrog cov hlau vuam tsawg dua. Ua tib zoo vuam tuaj yeem zam qhov tshwm sim ntawm kev nkag tsis tiav thiab fusion.

 

3. Tom ntug

Tom qab welding, lub concave zawj ntawm qhov sib txuas ntawm lub hauv paus hlau thiab cov ntug vuam hu ua undercutting.

Yog vim li cass:

1) Cov txheej txheem vuam tsis loj dhau, qhov vuam tam sim no siab dhau lawm, qhov hluav taws xob arc siab dhau lawm, thiab cov khoom siv hluav taws xob loj dhau.

2) Yog hais tias qhov vuam ceev ceev heev thiab cov hlau vuam tawm hauv lub pas dej ua ke ua ntej sau lub qhov arc, qhov kev txiav yuav tshwm sim.

3) Lub viav vias tsis sib xws ntawm vuam teeb, ntau lub kaum sab xis ntawm rab phom vuam thaum vuam, thiab lub viav vias tsis zoo kuj tuaj yeem ua rau qis dua.

Kev tiv thaiv:

1) Kho thiab txo qhov vuam tam sim no lossis arc voltage.

2) Tsim nyog ua kom cov hlau pub ceev los yog txo qhov vuam ceev thiab nyob twj ywm lub sij hawm ntawm ntug ntawm lub pas dej molten kom cov hlaws weld puv puv.

3) Txo cov yaj qhov dav kom tsim nyog, ua kom qhov tob tob, thiab txhim kho qhov sib piv ntawm cov vuam seam muaj qhov cuam tshuam tseem ceeb ntawm kev tshem tawm ntug qhov tsis xws luag.

4) Kev ua haujlwm vuam yuav tsum xyuas kom meej tias cov phom vuam viav vias sib npaug.

 

4. Tungsten clip

Cov impurities uas tsis yog xim hlau tseem tshuav nyob rau hauv cov hlau vuam thaum lub sij hawm vuam yog hu ua slag inclusions. Lub tungsten electrode melts thiab ntog rau hauv lub pas dej molten vim yog tam sim no ntau dhau los yog kev sib tsoo nrog cov khoom siv vuam hlau, ua rau tungsten suav nrog.

Yog vim li cass:

1) Kev tu tsis tiav ua ntej welding ua rau oxidation hnyav ntawm qhov kawg ntawm lub vuam hlau, uas ua rau slag suav nrog.

2) Kev xaiv tsis raug ntawm cov duab thiab vuam tsis zoo ntawm qhov kawg ntawm tungsten electrode ua rau kub hnyiab ntawm qhov kawg thiab tsim cov tungsten inclusions.

3) Lub vuam hlau yog nyob rau hauv kev sib cuag nrog cov tungsten electrode thiab cov roj oxidizing tau yuam kev.

Kev tiv thaiv:

1) Cov txheej txheem tu tshuab thiab tshuaj lom neeg tuaj yeem siv los tshem tawm cov oxides thiab av ntawm qhov zawj thiab vuam hlau; High zaus pulse arc ignition yog siv, thiab lub melting kawg ntawm vuam hlau yog ib txwm nyob rau hauv lub tiv thaiv cheeb tsam.

2) Lub vuam tam sim no yuav tsum phim cov duab ntawm tungsten electrode kawg.

3) Txhim kho kev ua haujlwm zoo, zam kev sib cuag ntawm vuam hlau thiab tungsten electrode, thiab hloov cov roj inert.

 

5. Hlawv dhau

Vim lub siab kub ntawm lub pas dej molten thiab ncua sij hawm txhaws ntawm cov hlau, cov vuam molten hlau ntws tawm ntawm qhov zawj thiab tsim ib qho kev puas tsuaj perforation.

Yog vim li cass:

1) Tshaj vuam tam sim no.

2) Lub vuam ceev yog qeeb heev.

3) Daim ntawv groove thiab sib dhos clearance yog tsis tsim nyog.

4) Cov welder muaj kev ua haujlwm tsawg.

Kev tiv thaiv:

1) Txo cov vuam tam sim no kom tsim nyog.

2) Tsim nyog nce qhov vuam ceev.

3) Cov txheej txheem zawj yuav tsum ua raws li cov lus qhia tshwj xeeb, thiab qhov sib dhos sib dhos tuaj yeem hloov kho kom nce qhov tsis pom ntawm ntug thiab txo qhov sib txawv hauv paus.

4) Cov txheej txheem ua haujlwm zoo dua

 

6. Weld hlaws overburning thiab oxidation

Cov khoom oxidation hnyav yog tsim nyob rau sab hauv thiab sab nrauv ntawm cov hlaws weld.

Yog vim li cass:

1) Lub tungsten electrode tsis concentric nrog lub nozzle.

2) Cov txiaj ntsig kev tiv thaiv roj tsis zoo, cov roj purity tsawg, thiab tus nqi ntws tsawg.

3) Qhov kub ntawm lub pas dej molten yog siab dhau.

4) Lub tungsten electrode txuas mus deb dhau thiab qhov ntev arc ntev dhau lawm.

Kev tiv thaiv:

1) Kho qhov concentricity ntawm tungsten electrode thiab lub nozzle.

2) Ua kom muaj roj purity thiab nce cov roj ntws kom tsim nyog.

3) Txhim kho qhov tam sim no kom tsim nyog, txhim kho vuam ceev, thiab sau cov xaim kom raws sijhawm.

4) Txo cov tungsten electrode txuas ntxiv kom tsim nyog thiab txo qhov ntev arc.

 

7. Txhaum

Raws li kev cuam tshuam ntawm vuam kev ntxhov siab thiab lwm yam, lub zog sib txuas ntawm cov hlau atoms hauv cheeb tsam ntawm qhov sib koom ua ke raug puas tsuaj, ua rau muaj qhov khoob.

Yog vim li cass:

1) Cov txheej txheem vuam tsis tsim nyog, kev sib koom ua ke ntawm cov welds ntau dhau, thiab kev txwv ntau dhau ntawm cov pob qij txha welded.

2) Qhov luaj li cas ntawm lub pas dej yaj yog loj heev, qhov kub thiab txias yog siab dhau, thiab muaj ntau cov hlau alloy burnout.

3) Lub arc raug nres sai heev, lub qhov arc tsis puv tag, thiab cov hlau vuam raug tshem tawm sai heev;

4) Qhov fusion piv ntawm cov khoom siv vuam tsis haum. Thaum lub melting kub ntawm vuam hlau yog siab dhau lawm, nws tuaj yeem ua rau liquefaction tawg nyob rau hauv tshav kub cuam tshuam cheeb tsam.

5) Kev xaiv tsis raug ntawm cov alloy muaj pes tsawg leeg rau vuam hlau; Thaum cov ntsiab lus magnesium nyob rau hauv qhov vuam yog tsawg dua 3%, los yog cov ntsiab lus ntawm cov hlau thiab silicon impurity tshaj qhov txwv, qhov kev nyiam rau cov kab nrib pleb nce.

6) Lub arc crater tsis puv thiab tawg tuaj

Kev tiv thaiv:

1) Kev tsim cov txheej txheem vuam yuav tsum tsim nyog, thiab cov txheej txheem ntawm welds tuaj yeem sib cais. Welds yuav tsum tsis txhob muaj kev ntxhov siab ntau npaum li qhov ua tau thiab qhov sib txuas vuam yuav tsum raug xaiv kom tsim nyog.

2) Siv cov vuam tam sim no me me los yog ua kom cov vuam ceev kom tsim nyog.

3) Cov txheej txheem arc extinguishing ua haujlwm yuav tsum raug. Cov hlau lead tawm phaj tuaj yeem muab ntxiv rau ntawm qhov chaw tua hluav taws kom tsis txhob tua sai heev, los yog siv cov cuab yeej attenuation tam sim no los sau cov arc qhov.

4) Xaiv cov khoom siv vuam raug raug. Cov muaj pes tsawg leeg ntawm cov xaiv vuam hlau yuav tsum phim cov khoom siv hauv paus.

5) Ntxiv ib daim pib arc los yog siv cov cuab yeej attenuation tam sim no los sau lub qhov arc.