Mig vuam, paub txog nws cov txiaj ntsig thiab versatility, cia li cia li tiv thaiv weld weld pas dej los ntawm cov pa weld los ntawm cov pa weld los ntawm cov pa weld Ntawm cov kev xaiv ntau yam, CO₂ (carbon dioxide) sawv ntsug raws li kev siv dav dav thiab raug xaiv. Lo lus teb rau seb nws tuaj yeem siv los ua cov pa thaiv cov roj rau mig vuam yog} Tab sis nws yuav tsum yog} Tab sis nws yuav tsum tau ua, Weld cov ntsiab lus teb. Kev nkag siab thaum nkag siab thiab yuav ua li cas siv CO₂ ua kom muaj txiaj ntsig zoo weld zoo thaum rub tawm nws cov kev zoo.
Vim li cas CO₂ ua haujlwm: Shielding mechanism thiab sib xyaw
Kev tiv thaiv ua cov hluav taws xob roj los ntawm cov pa roj oxygen, nitrogen, thiab noo noo hauv thaj chaw weld, tiv thaiv cov khoom siv los ntawm kev cuam tshuam nrog cov hlau molting. Thaum rhuab, co rho dispociates rau hauv carbon monoxide (co) thiab oxygen tso tawm ua tus mob oxygen tso tawm ua tus muaj txiaj ntsig me me, uas tuaj yeem muaj txiaj ntsig zoo rau qee cov hlau.
Nws qhov sib raug zoo nrog MIG vuam stems los ntawm nws lub peev xwm los ruaj khov lub arc, tshwj xeeb yog thaum ua khub nrog cov hlau tawv tsim rau cov hlau. Piv txwv li, Er70s-6, ib qho kev sib tw hlau Mig sib luag, ua haujlwm sib khi nrog kev lom zem. Cov pa roj txhawb nqa cov hlau melting thiab weld da dej, kom ua kom cov muab tub lim hlau fuses nrog cov khoom sib xyaw. Qhov no ua rau koom nrog kev lag luam nyob rau hauv kev lag luam xws li kev tsim kho rau kev tsim khoom lag luam, qhov twg cov hlau vuam dominates.
Qhov zoo ntawm kev siv CO₂ rau MIG VUAM
CO₂ muaj cov kev pab sib txawv uas ua rau nws xaiv qhov kev xaiv zoo hauv cov ntawv thov tshwj xeeb:
Tus nqi - ua hauj lwm zoo
Piv rau sib piv rau argon -} Raws li sib xyaw (piv txwv li, 75%? Qhov kev ntsuas tus nqi sib txawv ntxiv rau hauv high- Cov khoom ntim haujlwm, xws li cov qauv siv roj hlau lossis tsim khoom siv roj teeb uas muaj roj Rau lub khw me lossis nyiaj txiag {-}}} ₂₂ ₂₂₂₂₂₂ oper₂₂ oper oper without without without without without without without without without oper without without without without without without integrု oper်း kev ua haujlwm yam tsis txi kev ua haujlwm.
Txhim kho kom nkag
Kev tsom xam ntau dua, kub dua arc ntau dua Argon, uas nce weld nkag mus. Qhov no yog qhov tseem ceeb rau koom nrog tuab cov ntaub ntawv (1/4 nti lossis tuab dua) lossis ua tiav cov fusion fulls nrog cov khoob khoob. Hauv kev sib tw vuam, qhov twg tob tob nkag kom load {{}}}}} pab ua kom tau raws li AWS D1.1.
Versatility nyob rau sab nraum zoov lossis yeeb yam
Thaum mig vuam feem ntau yuav tsum muaj kev tiv thaiv los ntawm cua (uas tuaj yeem cuam tshuam cov pa roj av), co₂ yog denser ntau dua huab cua thiab ntau dua resistant rau kev ntxhov siab rau argon. Qhov no ua rau nws xaiv tau zoo dua rau semi-}}}}}}}}}}}} open open open open open open, open្ worksh,, qhov twg ua kom tiav cua tiv thaiv yog qhov nyuaj. Nws qhov ruaj khov txo qhov kev pheej hmoo ntawm kev ua kom pom kev vim los ntawm cov pa thaiv cov pa.
Txwv: Thaum co₂ yuav tsis yog qhov kev xaiv zoo tshaj plaws
Txawm hais tias nws cov txiaj ntsig, CO₂ muaj cov kev txwv uas txwv nws siv hauv qee qhov xwm txheej:
Nce nti thiab Weld pom kev
Lub zog Axidizing ntau dua thiab oxidizing nyhuv muaj zog ntawm kev sib koom tau ntau dua - cov tee dej me me uas lo rau cov khoom siv hauv paus. Qhov no yuav tsum tau txuas ntxiv ntxiv - Weld tu, uas yog impractical tu, uas yog cov khoom siv ua vajtsev uas muaj cov khoom sib txawv. Argon sib xyaw, los ntawm kev sib piv, tsim cov tshuaj ntxuav tais, smootherel nrog tsawg heev.
Kev pheej hmoo ntawm oxidation rau alloy steels
CO₂ tus oxidizing xwm tuaj yeem ua kom tau cov khoom siv hauv stainless hlau, qis {{{{}} cov hlau alleoy}. Piv txwv li, vuam stainless hlau nrog Cais ua rau chromium ploj (ib qho tseem ceeb rau corrosion tsis kam) thiab cov khoom chromium oxides, tsis muaj zog ntawm Weld lub peev xwm tiv thaiv xeb. Ib yam li ntawd, txhuas welded nrog boos txhim kho cov txheej oxide cov roj uas tiv thaiv cov laj kab kom tsim nyog. Rau cov ntaub ntawv no, argon {{{{}} raws roj (piv txwv li, 98% egon / 2% oxygen rau stainless hlau) yog qhov tsim nyog.
Brittleness hauv qhov siab -} Daim ntaub ntawv thov roj carbon
Nyob rau hauv high -} packoon steel vuam, CO₂ tuaj yeem qhia cov pa roj weld, ua kom muaj kev pheej hmoo ntau, brittle qauv zoo li martensite. Qhov no ua rau cov weld nquag tawg nyob rau hauv kev ntxhov siab, uas yog tsis lees txais rau cov khoom tseem ceeb xws li cov hlab ntsha siab lossis cov khoom siv siab los yog CRANE. Ntawm no, argon - koom nrog cov ntsiab lus qis dua nrog cov ntsiab lus qis (piv txwv li 10-20%) tshuav 10 -20%) tshuav nyiaj li cas.
Cov ntawv thov zoo tagnrho rau kev sib koom tes rau hauv MIG VUAM
CO₂ paub zoo nyob rau hauv cov xwm txheej uas raug nqi, nkag mus, thiab Carbon Steel sib xyaw yog qhov tseem ceeb:
Cov txheej txheem steelrice: vuam kuv {- cov kab mob sib sib zog nqus thiab tus nqi girders, los sis tus nqi qis, ua kom tiav {1} ua tiav cov pob qij txha.
Cov khoom siv tuab vuam: koom nrog hnyav cov phiaj (piv txwv li, hauv kev lag luam tshuab kev lag luam) cia siab rau kev ua kom tiav cov lus pom zoo tag nrho.
Tsawg - pa tau los yog siab {{1} Tus nqi hluav taws xob ntau dua: Hauv kev siv hluav taws xob siab heev)
Kev Kho Mob: Rau on {-}} Cov pa roj hlau lossis khoom siv hluav taws xob (ntawm cov thooj voos kheej kheej) ua rau nws muaj peev xwm ntau dua li aregon blends.
Kev coj ua zoo tshaj plaws rau kev siv CO₂ hauv MIG VUAM
Txhawm rau kom ua tiav cov txiaj ntsig nrog kev tiv thaiv roj:
Phim rau cov steel hlau: siv CO₂ tsuas yog nrog me me lossis qis - cov hlau carbon (txog 0.3% carbon). Zam nws rau cov hlau tsis muaj hlau, txhuas, lossis siab - cov hlau alloy.
Txhim kho cov pa roj flow: tswj hwm tus nqi txaus ntawm 20-30 cubic feet ib teev (cfh). Dhau me ntsis ntws tawm ntawm weld kis rau huab cua, ua rau porosity; Siv sijhawm ntau dhau ntawm cov roj thiab tsim cov cua hlob.
Kho cov kev sib txuas Tham nrog cov xaim xaij chaw tsim cov txheej txheem rau parameter muaj sia.
Kev tswj yuam kev protactely: Siv los tiv thaiv {- nti spatter lossis nozzles kom txo cov posts- Weld tu. Rau qhov chaw tseem ceeb, xav txog 80% Argon / 20% koom ua ke xwb, ntsuas tus nqi thiab tsos.
Xaus: Muab - ib qho khoom tseem ceeb rau cov hlau roj carbon hlau mig vuam
CO₂ yog lub peev xwm thiab siv cov roj av zoo rau mig vuam, tshwj xeeb rau cov ntawv thov steel. Nws tus nqi - ua hauj lwm zoo, muaj zog tiv thaiv, thiab cua tiv thaiv ua rau nws tsis tseem ceeb hauv kev lag luam zoo nkauj, kev tsim khoom hnyav, thiab kev kho hluav taws xob, thiab kev kho kom zoo. Thaum nws yog qhov tsis haum rau cov hlau ua kom zoo nkauj lossis dai kom zoo nkauj, nws lub luag haujlwm hauv Carbon Steel Vuam tseem tsis ntseeg thiab ua haujlwm seem.
Los ntawm kev sib koom ua ke nrog cov phiaj xwm steel thiab ua raws li cov kev coj ua zoo rau cov khoom siv thiab cov kab mob welmeters tuaj yeem tsim nyog, txhim khu kev qha welds. Nyob rau hauv cov ntsiab lus tseeb, boos ua pov thawj uas siv tau zoo mig vuam tsis xav tau cov roj uas kim heev-} Je long contride daim ntawv thov.
