Dab tsi pab mig welder?

MIG (hlau inert roj) vuam, lub pobzeb ntawm niaj hnub tsim thiab kev tsim qauv niaj hnub no, cia siab rau cov ris tsho kom huv, muaj zog. Cov pa roj weld tiv thaiv lub pas dej weld los ntawm cov paug ntawm cov pa roj carbonfen, thiab noo noo, thiab ua kom zoo nkauj, lossis fusion fusion. Qhov kev xaiv ntawm cov roj nyob ntawm cov hlau hauv paus, Weld cov kev xav tau, thiab kev sib cav sib ceg, nrog cov tshuaj sib xyaw tshwj xeeb, nrog cov tshuaj sib xyaw tshwj xeeb rau cov khoom siv sib txawv.
Inert gases: lub hauv paus rau tsis - ferrous hlau
Inert gases, uas tsis muaj kev cuam tshuam nrog cov hlau, yog qhov tseem ceeb rau kev siv vuam zoo li txhuas, tooj liab, thiab magnesium.
Argon (ar): lub workorse rau txhuas
Ntshiab Aggon yog tus qauv thaiv cov roj rau Mig welding welding txhuas. Nws lub siab ntom ntom (1.38 lub sij hawm uas huab cua) ua ib pas dej khov kho ib puag ncig lub ntsej muag weld Argon lub thermal tsawg thermal consivity tseem tsim kev tsom xam cov ntawv arc, piv txwv li, 16 {{} Kev ntsuas kub) qhov twg precise tshav kub tswj tiv thaiv kev hlawv-los.
Rau thicker aluminium (1/4 nti lossis ntau dua), Argon {} Helium helium blends (piv txwv li% 50% yog feem ntau siv. Helium nce zuj zus mus rau qhov kub thiab txias, txhim kho kev nkag mus rau hauv ntom ntom ntom ntom ntom thaum tswj kev tiv thaiv kev cia siab. Qhov kev sib xyaw no muaj ntau hauv kev siv tsheb thiab cov khoom siv hauv tsheb, qhov chaw muaj zog, cov khoom siv sib xws hauv cov khoom siv tuab (piv txwv li cov nroj tsuag cav) yog qhov tseem ceeb.
Reactive gases: optimized rau ferrous hlau
Cov roj av zoo li cuam tshuam me me nrog hlau tab sis txhim kho arc kev ua si, ua rau lawv tsis tseem ceeb rau vuam carbon hlau, qis {}} Almoy Hlau, thiab cam khwb cia hlau.
Cov pa roj carbon dioxide (CO₂): Nqi -}}}}}} Siv tau zoo rau cov hlau
Cov ntshiab? Nws cov khoom siv reactive tsim cov roj kub kub dua li cov roj ntsha, nce nkag mus rau cov phiaj tuab tuab (1/2 nti lossis ntau dua) siv hauv cov txheej txheem duab. CO₂ tseem pheej yig dua Argon, ua rau nws zoo rau siab-, tsheb nchav txuas ntxiv.
Thaum boli tuaj yeem ua rau cov xov tsawg, hlau sib xyaw hlau ua ke (piv txwv li,} -} Txawm li cas los xij, cov ntshiab?
Argon - bovts: ntsuas qhov zoo thiab ua tau zoo
Blends ntawm Argon thiab CO₂ (piv txwv li, 75% AR / 25% CO, 90% THEM / 10% CO) Lawv muab sib xyaw argon lub arc stability nrog co₂ tus nkag, muab:
• Smooter Weld Beads: Argon txo cov ntsej muag, piv txwv li cov kab teeb ci lossis cov khoom sib dhos) qhov twg tshwm sim teeb meem.
• Zoo li Fusion: Kev sib xyaw ua ke ntawm arc ua kom muaj kev cuam tshuam ntawm weld (grooves raws weld steges) hauv nyias hlau (18-kawg li 1/4 nti).
• Txo porosity: Argon's ntom shield nitrogen khaws cia nitrogen tuaj tos, ib qho kev ua pa roj av hauv cov ntshiab ..}
Lub 75/25 Blend yog ib qho kev mus-
Tshwj xeeb gases rau stainless hlau thiab high - alloys
Stainless hlau thiab high-}}}} alloys yuav tsum muaj roj av uas khaws lawv cov khoom ua haujlwm corrosion tsis kam thiab cov khoom siv tshuab.
Argon - e olygen froms rau stainless hlau
Austenitic stainless hlau (piv txwv li, 304, 316) cia siab rau cov chromium rau corrosion rau corrosion tsis kam, yog li thaiv cov roj yuav tsum los tiv thaiv chomium oxidation. Blends xws li 98% ar / 2% o₂ lossis 90% AR / 8% COG / 2% O₂ yog tus qauv. Oxygen txhim khu kev "Watting" (muaj peev xwm ntawm cov hlau ua kom sib kis tusyees), ua kom muaj kev sib tw weld, thaum ua rau muaj kev sib kis Weld Qhov nyiaj tshuav no tseem ceeb rau cov khoom siv ua khoom noj lossis cov cuab yeej kho mob, qhov twg stainless hlau welds yuav tsum muaj xeb thiab cov kab mob buildup.
Argon - helium rau high-} nickel alloys
Alloys zoo li inconel (siv nyob rau hauv Aerospace thiab kev ua lag luam) thov kev tiv thaiv kom tsis txhob muaj paug. Argon - Helium blends (piv txwv li, 70% ar / 30% Helium's Arc Tshav Kub ua kom tiav fusion yam tsis muaj kev sib haum xeeb, tswj nws cov qauv txheej txheem kev ntseeg.
Cov kev txiav txim siab tseem ceeb hauv kev xaiv roj
Mig Welders xaiv gases raws li plaub yam:
• Puag hlau: Aluminium Yuav Tsum Tau Argon; steel ua haujlwm nrog kev lom zem lossis sib xyaw; Stainless hlau yuav tsum tau Argon - kev sib xyaw.
• Cov ntaub tuab: cov hlau nplaum: cov hlau me me (tsawg dua lossis sib npaug nrog 1/4 nti) Siv Argon} Rich gases rau precision; Cov hlau tuab (ntau dua los yog sib npaug rau 1/2 nti) xav tau coo los yog helium rau kev nkag mus.
• Weld Zoo: pom lossis cov kab tseem ceeb (piv txwv li, cov hlab ntsha) siv Argon Blars kom txo tau cov kab ke thiab tsis xws luag.
• Tus nqi: Koom yog pheej yig tshaj rau cov hlau; Argon lossis Helium Blends yog cov roj ntsha tab sis tsim nyog rau tsis {{0} -}}}}}}}}}}}}}}} cov hlau alloy.
Kev coj ua zoo tshaj plaws rau Mig Roj Siv
Rau cov txiaj ntsig zoo tshaj plaws:
• Teeb cov nqi kom haum: 20-30 CBH (cubic feet ib teev) yog qauv. Cov roj me me dhau ntawm weld nthuav tawm; Ntau dhau heev ua rau muaj kev kub hlob uas rub tawm hauv huab cua.
• Zam kev ya raws: dej vapor nyob rau hauv cov roj kab ua rau hydrogen -}} indused porosity. Siv cov roj qhuav thiab nruab inline lim dej, tshwj xeeb tshaj yog hauv cov chaw noo noo.
• Daim Ntawv Qhia Txog Cov Ntawv: Cua lossis cua los cuam tshuam cov roj teeb. Hauv chaw sab nraum zoov, siv cov cua tshuab lossis hloov mus rau Denser Argon kom muaj kev tiv thaiv.
• Sib phim roj kom muaj cov xaim xaim: khub coi- Raws roj nrog deasidized xov hlau nrog cov xov hlau depoxidized (piv txwv, ER70s-6) los tiv thaiv oxidation hauv steel welds.
Xaus: Cov roj rau txhua daim ntawv thov
Mig Welders siv ntau yam roj av ua rau ua haujlwm:
Txhuas Txhuas: Ntshiab Argon (nyias) lossis Argon {{}} helium (tuab).
• Hlau: CO-(tus nqi) lossis Argon - b₂₂ (zoo).
• Stainless hlau: Argon -} oxygen hube (corrosion tsis kam).
Los ntawm kev xaiv roj xis, mig welders xyuas kom muaj zog, puas muaj qhov tsis muaj zog {}}}} los ntawm kev lag luam thiab kev tsim kho rau Aerospace thiab kev kho mob. Cov roj tsis yog tsuas yog ua piv txwv; Nws yog tus yuam sij los qhib MIG VUAM MIG VUAM MIG thiab ntseeg tau.