1.Yuav ua li cas cov txheej txheem thiab lub zog tsim mechanisms ntawm qhov chaw vuam sib piv?
Stainless hlau kauj:
High Resistance: Stainless hlau muaj ib tug siab resistivity. Thaum tam sim no ntws los ntawm nws, qhov kev sib cuag ntawm cov workpieces thiab stainless hlau nws tus kheej tsim ib tug loj npaum li cas ntawm tshav kub, ua rau cov hlau yaj sai sai thiab tsim ib tug weld nugget.
Uncoated: Qhov saum npoo yog huv si (tom qab tshem cov roj thiab av), thiab kev tiv thaiv kev tiv thaiv yog ruaj khov thiab tswj tau.
Cov txiaj ntsig: Cov txheej txheem vuam yog ruaj khov, thiab cov ntaub ntawv weld nugget sai sai, sib npaug, thiab nrog qhov yooj yim tswj tau qhov ntev. Ib tug txaus loj thiab tag nrho weld nugget yog lub hauv paus rau siab zog.
Galvanized Coil:
Qhov cuam tshuam ntawm Zinc Txheej (Lub hauv paus ua rau Vuam nyuaj):
Txoj Kev Tsis Txaus Siab: Zinc muaj qhov qis qis dua li cov hlau, thiab zinc txheej npog saum npoo. Thaum siv tam sim no, nws nyiam dhau los ntawm qhov qis - cov zinc txheej tiv thaiv, dispersing cua sov thiab ua rau nws nyuaj rau cov hlau substrate kom ncav cuag nws melting kub.
Yuav tsum tau ua kom muaj cua sov siab: txhawm rau kov yeej cov txheej txheem zinc, yuav tsum siv lub vuam tam sim no ntau dua thiab lub sijhawm vuam ntev dua.
Zinc Melting thiab Vaporization: Zinc lub melting point (~ 420 degree) thiab boiling point (~ 907 degree) yog qis dua steel (~ 1500 degree). Cov zinc txheej melts thiab vaporizes ntev ua ntej cov hlau melts.
Spatting: Boiling zinc vapor hnyav dhau los ntawm qhov sib txawv ntawm electrode, ua rau ntau qhov sib txawv uas ua rau cov electrode thiab workpiece nto.
Porosity thiab Defects: Zinc vapor daig nyob rau hauv weld nugget tsim cov kev tsis xws luag xws li porosity thiab shrinkage, ua rau tsis muaj zog ntawm daim ntawv cog lus.
Alloying thiab nkig txheej: Molten zinc thiab steel tsim ib qho nyuaj thiab nkig zinc- hlau alloy (xws li FeZn13) ntawm ciam teb ntawm cov yaj nucleus. Cov cheeb tsam no muaj qhov tsis zoo toughness thiab nws yooj yim los ua qhov pib tawg.
2.Yuav ua li cas lub zog thiab tsis ua hauj lwm hom piv?
Stainless hlau kauj:
Lub zog: Raws li qhov tsis raug, qhov loj, ntom weld nugget ua rau lub zog siab. Lub zog weld feem ntau yog sib npaug ntawm cov khoom siv hauv paus.
Hom Failure: Hauv kev ntsuam xyuas tensile shear, qhov zoo tshaj plaws tsis ua hauj lwm hom yog "khawm" kua muag, qhov twg cov weld rub ib ncig "plug" tawm ntawm lub hauv paus khoom los ntawm ib sab. Qhov no qhia tau hais tias lub weld nws tus kheej muaj zog dua cov khoom siv hauv paus.
Galvanized Coil:
Lub zog: Vim yog cov teeb meem ua tau hais los saum toj no, qhov vuam nugget hauv galvanized steel qhov chaw welds feem ntau raug kev txom nyem los ntawm:
Insufficient Size: Lub nugget me dhau vim muaj cua sov tsis txaus.
Qhov tsis xws luag: Internal porosity thiab cov kab nrib pleb ua rau txo cov load zoo -cov kabmob.
Hom Failure: Feem ntau interfacial puas los yog ib nrab tearing. Ntawd yog, qhov vuam yog ncaj qha "rho tawm" ntawm ob daim hlau, lossis tsuas yog ib feem me me ntawm cov hlau raug rub tawm. Qhov no qhia tau hais tias lub zog weld qis dua li ntawm cov khoom siv hauv paus, ib qho kev qhia ntawm qhov tsis zoo weld.
3.Dab tsi yog qhov txawv ntawm qhov cuam tshuam ntawm electrode lub neej thiab tus nqi ntawm lub zog sib xws?
Stainless hlau kauj:
Lub taub hau electrode (feem ntau chromium-zirconium tooj liab) hu rau cov hlau tsis muaj steel, ua rau hnav qeeb dua.
Lub neej ntev electrode txhais tau hais tias weld loj thiab lub zog nyob ruaj khov nyob rau lub sijhawm ntev ntau lawm.
Galvanized Coil:
Electrode paug thiab hnav: Molten zinc alloys nrog cov tooj liab electrode (ua tooj dag), ua rau lub taub electrode soften sai, deform, thiab qhov.
Changes in electrode tip shape lead to uneven current density distribution and pressure concentration, further deteriorating weld quality and causing a sharp and unpredictable decrease in weld strength.
Cov electrode nquag regrinding lossis hloov pauv yuav tsum tau ua, uas tsis yog tsuas yog nce tus nqi xwb tab sis kuj ua rau muaj kev cuam tshuam ntau lawm thiab ua rau nws nyuaj los lav lub zog zoo ib yam.
4.Yuav ua li cas los txhim kho qhov chaw weld lub zog ntawm galvanized coils?
Siv lub siab- lub zog vuam tshuab: Nws yuav tsum muaj peev xwm muab qhov tam sim no siab dua qhov uas siv rau vuam stainless hlau.
Siv lub tshuab welding adaptive: Niaj hnub nimno nruab nrab- zaus inverter vuam tshuab muaj kev ua haujlwm zoo uas saib xyuas kev ua haujlwm tsis zoo thaum lub vuam txheej txheem thiab kho qhov tam sim no hauv lub sijhawm tiag tiag kom them nyiaj rau electrode hnav thiab zinc txheej hloov, kom ntseeg tau qhov zoo ntawm weld nugget.
Siv high -hardness electrodes: xws li dispersion- ntxiv dag zog rau tooj liab (xws li CuCrZr, CuCoBe) electrodes, uas muaj ntau dua recrystallization kub thiab zoo dua tiv thaiv zinc alloying.
Ua kom lub zog electrode: Qhov no yuav pab txhawm rau txhawm rau oxide zaj duab xis nyob rau theem pib ntawm vuam, muab kev tiv thaiv kev tiv thaiv ruaj khov, thiab kaw cov zinc vapor nyob rau hauv cov theem tom ntej ntawm vuam, txo cov spatter thiab porosity.
5.Dab tsi yog cov ntsiab lus ntawm kev sib piv ntawm qhov chaw weld lub zog ntawm galvanized coils thiab stainless hlau coils?
Stainless hlau coils muaj qhov dav dav qhov txheej txheem vuam qhov rais, yooj yim yielding siab -lub zog, zoo ib yam welds, ua rau lawv xaiv rau kev ntseeg tau.
Galvanized coils, ntawm qhov tod tes, yog qhov nyuaj dua rau qhov pom qhov vuam, feem ntau ua rau qis dua thiab muaj zog vuam ntau dua. Lawv vam khom rau cov tshuab vuam siab heev, cov txheej txheem tshwj xeeb, thiab kev saib xyuas electrode nruj heev. Lawv qhov qis - tus nqi kom zoo dua tuaj yeem raug cuam tshuam los ntawm cov nqi vuam siab thiab muaj peev xwm txaus ntshai.