Qhuav sib faib ntawm cov roj sib tov xaiv thaum vuam

Hauv kev ua haujlwm vuam, xaiv cov roj sib tov tsim nyog yog tus yuam sij kom ntseeg tau tias vuam zoo thiab ua haujlwm zoo. Nov yog qee cov lus qhia txog kev xaiv cov roj sib xyaw kom pab koj txiav txim siab ncaj qha thiab raug.

Lub luag haujlwm ntawm cov khoom siv vuam sib txuas

Ar: Feem ntau siv hauv TIG vuam thiab MIG vuam vim nws tuaj yeem muab qhov ruaj khov thiab huv vuam seam.

O ₂: Ntxiv me me ntawm O ₂ thaum lub sijhawm vuam txheej txheem tuaj yeem ua rau qhov kub thiab txias ntawm lub pas dej molten.

CO ₂: Thaum tov nrog Ar, feem ntau yog siv hauv MIG vuam los txhim kho vuam ceev thiab qhov tob tob.

Nws: Txawm hais tias tus nqi siab, nws tuaj yeem nce qhov kub thiab qhov vuam ceev, tshwj xeeb tshaj yog tsim rau cov khoom siv vuam xws li txhuas alloys.

Mixed gases feem ntau muab faib ua ob pawg: binary sib tov thiab ternary sib tov.

Binary sib tov gas

Binary gas sib tov yog ib qho roj av uas muaj ob lub roj sib xyaw ua ke hauv ib qho kev faib ua feem. Hauv kev sib txuas, kev sib xyaw binary feem ntau suav nrog cov hauv qab no:

1. Ar+O ₂: Ntxiv qhov tsim nyog ntawm O ₂ rau Ar tuaj yeem txhim kho arc stability thiab kho cov tee dej kom zoo. Cov yam ntxwv ntawm O ₂ tuaj yeem ua kom kub ntawm cov hlau hauv lub pas dej molten, txhawb cov hlau ntws, txo cov vuam yuam kev, ua rau cov hlaws vuam smoother, ua kom vuam ceev, thiab txhim kho vuam efficiency. Cov roj sib xyaw no yog tsim rau vuam cov hlau, cov hlau tsis tshua muaj hlau, thiab cov hlau tsis muaj steel ntawm ntau cov tuab.

2. Ar+CO ₂: CO ₂ tuaj yeem txhim kho vuam lub zog thiab kev tiv thaiv corrosion, tab sis cov ntshiab CO ₂ tiv thaiv cov roj tawg ntau dhau. Sib tov ruaj khov Ar hauv nws tuaj yeem txo cov hlau txaws tus nqi zoo. Cov roj sib xyaw no kuj tsim nyog rau vuam cov hlau thiab stainless hlau.

3. Ar+H ₂: H ₂ yog ib qho kev txo cov roj combustion uas tuaj yeem ua rau qhov kub thiab txias, ua kom vuam ceev, tiv thaiv hauv qab ntws, txo qhov tsim ntawm CO pores, thiab tiv thaiv vuam tsis xws luag. Cov roj sib xyaw no muaj cov txiaj ntsig zoo ntawm cov nickel raws li alloys, npib tsib xee tooj liab alloys, thiab stainless hlau.

Ternary sib tov

Ib tug ternary sib tov yog ib tug roj system uas muaj peb gases tov nyob rau hauv ib tug tej yam kev faib ua feem. Nyob rau hauv welding, ntau ternary mixs muaj xws li cov hauv qab no:

1. Ar + O ₂ + CO ₂: Qhov sib xyaw ternary no ua ke qhov zoo ntawm Ar + O ₂ thiab Ar + CO ₂ binary mixs, uas tuaj yeem txo qhov vuam spatter, txhim kho yaj ntws, txo cov npuas tsim, thiab txhim kho vuam zoo. Nws tuaj yeem siv rau vuam carbon steel, qis-alloy steel, thiab stainless hlau ntawm txawv thicknesses, nrog rau ntau yam kev siv.

2. Ar + Nws + CO ₂: Cov roj sib xyaw no tuaj yeem txhim kho arc stability thiab kev ua haujlwm, nrog rau kev ua kom kub kub, txhim kho fluidity, thiab txhim kho vuam zoo thiab ceev. Vim Nws yog ib qho roj inert nrog cov tshuaj tsis muaj zog, nws cov nyhuv oxidation ntawm lub vuam seam yog tsawg. Cov roj sib xyaw no feem ntau siv rau ntau hom luv luv-circuit arc vuam thiab dhau vuam.

Ua tib zoo saib xyuas qhov kev faib ua feem ntawm cov roj sib xyaw thaum siv vuam

Qhov kev faib ua feem ntawm cov roj sib xyaw ncaj qha cuam tshuam rau cov nyhuv vuam. Piv txwv li, nyob rau hauv ib tug sib tov ntawm Ar thiab CO ₂ roj, ib qho kev nce nyob rau hauv qhov kev faib ua feem ntawm CO ₂ tuaj yeem txhim kho vuam ceev thiab nkag mus tob, tab sis kuj yuav ua rau muaj kev pheej hmoo ntawm txaws thiab porosity. Yog li ntawd, nws yog ib qho tsim nyog los kho qhov kev faib ua feem ntawm cov roj sib xyaw raws li cov kev xav tau tshwj xeeb.

Thaum xaiv cov roj sib xyaw, cov yam ntxwv xws li hom thiab cov yam ntxwv ntawm cov khoom siv vuam, cov txheej txheem vuam, thiab cov txheej txheem vuam yuav tsum raug txiav txim siab. Cov roj sib xyaw sib txawv muaj cov yam ntxwv sib txawv thiab siv tau, thiab yuav tsum tau xaiv raws li cov xwm txheej tshwj xeeb.