Vuam yog txheej txheem uas cov ntaub ntawv ntawm lub workpieces yuav tsum tau welded (tib yam los yog ntau hom) yog ua ke los ntawm cua sov los yog siab los yog ob qho tib si, nrog los yog tsis muaj muab tub lim, thiaj li hais tias cov ntaub ntawv ntawm lub workpieces yog bonded ntawm atoms tsim ib tug mus tas li. kev sib txuas. Yog li dab tsi yog cov ntsiab lus tseem ceeb thiab kev ceev faj rau stainless hlau vuam?
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Dab tsi electrodes siv los vuam stainless hlau?
Stainless hlau vuam pas nrig tuaj yeem muab faib ua chromium stainless hlau vuam pas nrig thiab chromium-nickel stainless hlau vuam pas nrig. Ob hom vuam rods uas ua tau raws li lub teb chaws tus qauv yuav raug soj ntsuam raws li lub teb chaws tus qauv GB / T983-2012.
Chromium stainless hlau muaj qee yam corrosion kuj (oxidizing acids, organic acids, cavitation), kub tsis kam thiab corrosion kuj. Feem ntau xaiv los ua cov khoom siv rau cov chaw nres tsheb fais fab, tshuaj lom neeg kev lag luam, roj av thiab lwm yam. Txawm li cas los xij, chromium stainless hlau feem ntau muaj qhov tsis zoo weldability, yog li kev saib xyuas yuav tsum tau them rau cov txheej txheem vuam, kev kho cua sov thiab xaiv qhov tsim nyog vuam rods.
Chromium-nickel stainless hlau vuam rods muaj corrosion kuj zoo thiab oxidation tsis kam thiab yog dav siv nyob rau hauv chemical kev lag luam, chiv, roj av, thiab kev kho mob machinery manufacturing. Txhawm rau tiv thaiv kev cuam tshuam ntawm intergranular vim cua sov, qhov vuam tam sim no yuav tsum tsis txhob loj dhau, uas yog kwv yees li 20% tsawg dua li carbon steel electrodes. Lub arc yuav tsum tsis txhob ntev heev, thiab cov interlayers yuav txias sai sai. Ib tug nqaim weld hlaws yog tsim nyog.
Cov ntsiab lus tseem ceeb thiab kev ceev faj rau stainless hlau vuam
1. Siv cov khoom siv hluav taws xob nrog cov yam ntxwv ntsug sab nraud, thiab siv cov polarity zoo rau DC (lub vuam hlau txuas nrog cov ncej tsis zoo)
1. Nws yog feem ntau haum rau vuam nyias daim hlau hauv qab 6 hli. Nws muaj cov yam ntxwv zoo nkauj vuam seam zoo thiab me me vuam deformation.
2. Cov roj tiv thaiv yog argon nrog purity ntawm 99.99%. Thaum vuam tam sim no yog 50 ~ 150A, argon roj ntws yog 8 ~ 10L / min; Thaum tam sim no yog 150 ~ 250A, argon roj ntws yog 12 ~ 15L / min.
3. Lub protruding ntev ntawm tungsten electrode los ntawm cov roj nozzle yog nyiam dua 4 mus rau 5 hli. Hauv qhov chaw uas muaj kev tiv thaiv tsis zoo xws li fillet welds, nws yog 2 mus rau 3 hli. Hauv qhov chaw nrog qhov tob tob, nws yog 5 mus rau 6 hli. Qhov kev ncua deb ntawm lub nozzle mus rau kev ua haujlwm feem ntau tsis ntau tshaj 15mm.
4. Txhawm rau tiv thaiv qhov tshwm sim ntawm vuam qhov pores, txhua qhov xeb, roj stains, thiab lwm yam ntawm qhov vuam yuav tsum tau ntxuav.
5. Lub vuam arc ntev yog nyiam dua 2 ~ 4 hli thaum vuam zoo tib yam hlau, thiab 1 ~ 3 hli thaum vuam stainless hlau. Yog tias nws ntev dhau lawm, kev tiv thaiv kev tiv thaiv yuav tsis zoo.
6. Thaum lub pob tw sib txuas, txhawm rau tiv thaiv sab nraub qaum ntawm lub hauv qab weld hlaws los ntawm oxidized, sab nraub qaum kuj yuav tsum tau tiv thaiv cov roj.
7. Txhawm rau ua kom cov roj argon zoo tiv thaiv lub vuam pas dej thiab ua kom yooj yim rau kev ua haujlwm vuam, cov kab nruab nrab ntawm cov tungsten electrode thiab cov khoom ua haujlwm ntawm qhov chaw vuam yuav tsum feem ntau tuav lub kaum sab xis ntawm 80 ~ 85 °, thiab lub kaum sab xis ntawm qhov chaw. muab tub lim thiab qhov chaw ntawm lub workpiece yuav tsum me me li sai tau. Feem ntau nws yog hais txog 10 °.
8. Windproof thiab ventilated. Hauv cov cheeb tsam uas muaj cua daj cua dub, nco ntsoov ntsuas ntsuas cov nets, thiab ntsuas qhov cua kom tsim nyog hauv tsev.
2. Cov ntsiab lus tseem ceeb thiab kev ceev faj rau MIG vuam ntawm stainless hlau
1. Siv lub tiaj tus yam ntxwv vuam fais fab, thiab siv rov qab polarity rau DC (vuam hlau txuas nrog rau qhov zoo electrode)
2. Feem ntau, cov ntshiab argon (99.99% purity) los yog Ar + 2% O2 yog siv, thiab tus nqi ntws yog nyiam dua 20 ~ 25L / min.
3. Arc ntev. MIG welding ntawm stainless hlau feem ntau welded nyob rau hauv cov kev hloov pauv hloov, thiab qhov voltage yuav tsum tau hloov mus rau qhov ntev ntawm arc ntawm 4 mus rau 6 hli.
4. Windproof. MIG vuam yog yooj yim cuam tshuam los ntawm cua, thiab qee zaum cua tuaj yeem ua rau lub qhov hws. Yog li, kev tiv thaiv cua yuav tsum tau coj mus rau qhov twg qhov cua ceev tshaj 0.5m / sec.
3. Cov ntsiab lus tseem ceeb thiab kev ceev faj rau stainless hlau flux cored hlau vuam
1. Siv cov yam ntxwv tiaj tus vuam fais fab, thiab siv rov qab polarity thaum DC vuam. Koj tuaj yeem siv cov CO2 welder zoo tib yam rau vuam, tab sis thov loosen lub siab ntawm cov hlau pub log me ntsis.
2. Cov roj tiv thaiv feem ntau yog cov pa roj carbon dioxide, thiab cov roj ntws tawm yog 20 ~ 25L / min.
3. Qhov kev ncua deb uas tsim nyog ntawm qhov vuam taub thiab lub workpiece yog 15 ~ 25mm.
4. Qhuav ncua ntev, qhov dav dav vuam tam sim no yog li 15mm thaum vuam tam sim no qis dua 250A, thiab txog 20 ~ 25mm thaum vuam tam sim no siab dua 250A yog qhov tsim nyog.
Post lub sij hawm: Dec-28-2023
