Stainless hlau yog ua kev zoo siab rau nws qhov kev zam corrosion, thiab kev thov kom zoo nkauj, ua rau nws muaj cov khoom noj khoom haus thiab cov khoom siv kho mob los tsim kho thiab ua haujlwm. Txawm li cas los xij, vuam stainless hlau xav tau precision thiab kev nkag siab ntawm nws cov khoom siv cov hlau, uas tuaj yeem cuam tshuam txog kev ua haujlwm ntawm cov corrosion. Yog li, yuav ua li cas weld stainless hlau kom zoo thaum khaws nws cov cwj pwm tseem ceeb? Ntawm no yog cov lus qhia ntxaws ntxaws.
Kev npaj: thawj kauj ruam mus rau txoj kev vam meej
Kev npaj kom zoo nyob hauv av rau qhov siab - zoo} zoo stainless hlau weld. Cov khoom siv saum npoo yog nquag mus paug los ntawm roj, roj, lossis txawm tias muaj cov av xeb), yog li maj mam ua kom huv si tsis yog {sib ceg. Siv lub stainless hlau - Tshwj xeeb xaim hlau) kom tshem tawm cov hlau oxides uas yog cov tshuaj tua kab mob xws li acetone lossis isopropyl cawv kom tshem cov roj. Rau cov ntaub ntawv tuab, bevel cov npoo los xyuas kom meej tag nrho cov kev nkag mus rau kev tsim cov pob qij txha, tshwj xeeb yog cov raj xa khoom lossis cov raj xa khoom.
Lwm kauj ruam tseem ceeb npaj yog xaiv cov khoom siv rau sab xis. Tus muab tub lim yuav tsum phim lub hauv paus hlau lub ntsej muag kom muaj kev tiv thaiv corrosion. Piv txwv li, 308L muab tub lim yog zoo tagnrho rau vuam 304 stainless hlau (thaum 316l filler khub nrog 316 stainless} Corrosion ib puag ncig zoo li cov ntawv thov marine). Tus "L" nyob rau hauv cov tub lim zis qhia pom tias muaj cov pa roj carbon tsawg, uas me me} Tus txheej txheem uas tuaj yeem ua kom muaj zog carbide tsis kam nyob rau hauv cov cua sov {}} be} cuam tshuam cheeb tsam (Haz).
Xaiv txoj kev vuam vuam
Stainless hlau yuav raug muab tso rau ntau txoj hauv kev, txhua qhov uas haum rau cov ntawv thov tshwj xeeb. Ntawm no yog cov feem ntau cov:
- Roj Tungsten Arc Vuam (GTaw / TIG):Xav txog cov ntu nyias (txog li 1/4 nti) thiab siab {2} Prech precision ua haujlwm (piv txwv, cov cuab yeej kho mob lossis cov khoom kho kom zoo nkauj). GTAW siv ib qho tsis - consumable tungsten elegsten electrode thiab cov kev thaiv cov pa hluav taws xob (feem ntau ntshiab argon) los tiv thaiv lub pas dej weld los ntawm oxidation. Nws muaj zoo heev tswj dua li cov lus qhia sov, txo qhov kev pheej hmoo ntawm warping lossis had puas. Txawm li cas los xij, nws yog qeeb qeeb thiab yuav tsum muaj kev txawj ntau dua lwm txoj kev.
- Roj Hlau Hlau Arc Vuam (Gmaw / Mig):Qhov zoo tagnrho rau cov ntaub ntawv tuab tuab thiab high - cov khoom ua haujlwm fints (piv txwv li, kev tsim qauv txheej txheem). MIG uses a consumable wire electrode and a shielding gas (argon with 2–5% carbon dioxide for 300-series stainless steels). Nws nrawm dua li TIG thiab yooj yim kawm, ua rau nws nrov rau kev lag luam. Ib lub laub-rub tawm phom yog pom zoo kom pom zoo rau cov xov hlau stainless hlau kom tiv thaiv kom tiv thaiv kinking.
- Tiv thaiv hlau arc vuam (smaw / pas):Haum rau sab nraum zoov lossis hnyav {{{{0 eg} Lub Luag Haujlwm Kev Siv (piv txwv li, Kev Kho Pipeline) qhov chaw nres nkoj yog qhov tseem ceeb. Smaw siv flux -} coated electrodes uas yaj los tsim shag, tshem tawm cov kev xav tau ntawm cov roj sab sab nraud. Xaiv tsawg - hydrogen electrodes (piv txwv li, e308l-16) kom tsis txhob muaj paj paws hauv Weld.
Qhov tseem ceeb vuam rau tus tswv
Stainless hlau lub siab thermal condactivity thiab tsawg thermal expendansion (piv rau cov hlau roj carbon) txhais tau tias kev tswj hwm kub yog qhov tseem ceeb. Cov cua sov ntau dhau los tuaj yeem nthuav tawm qhov Haz, ua rau cov pa nag lossis daus lossis ua rog. Yuav kom tsis txhob muaj no:
- Tswj tshav kub tawm: Siv qhov qis qis tshaj plaws thiab voltage xav tau los tswj lub tsev ruaj khov. Rau mig vuam 1/8-nti 304 vuam tsis muaj 304 stainless, pib nrog 17-20 volts thiab hlau pub ceev ntawm 175-250 nti ib feeb. Rau kev khi, ua kom lub arc luv thiab txav tau ruaj khov los tiv thaiv kev kub ntxhov.
- Tswj Kev Tiv Thaiv: Oxidation yog tus yeeb ncuab ntawm stainless hlau wels -}} Raug tshem tawm cov cua (xiav lossis ua kom xeb. Nco ntsoov cov kev thaiv cov roj roj roj uas txaus (15-25 cfh rau Mig / TIG) thiab cov roj npog lub pas dej weld kom txog thaum nws txias. Txog rau sab, siv cov roj lens kom txuas ntxiv kev pab them, tshwj xeeb tshaj yog cov khoom tuab.
- Txais yuav cov tsheb khiav ceev thiab lub kaum ntse ntse: Ib qho kev ua haujlwm ruaj khov, nruab nrab kev mus ncig ua si tiv thaiv kev kub ntxhov. Rau Mig, siv lub laub me ntsis lub kaum (5-10 degrees) txhawm rau txhim kho cov kev pab roj roj; Rau tig, lub nruab nrab lub tsev ua haujlwm zoo tshaj plaws. Zam kev tab tom tab tom dhau heev, raws li qhov no nce tshav kub kub thiab kev pheej hmoo ntawm oxidation.
Post -} vuam kev saib xyuas
Tom qab vuam, post - Kev kho mob tuaj yeem tsim nyog los rov kho corrosion tsis kam. Yog tias tus weld qhia, passivate nws siv lub nitric acid daws teeb meem lossis kev lag luam beivation gel {2} Qhov kev tshem tawm cov roj ntsha oxide txheej. Rau cov ntawv thov tseem ceeb (piv txwv li, zaub mov- cov khoom siv ua haujlwm (piv txwv, sib tsoo nrog lub weld thiab tshem tawm cov weld thiab tshem tawm slag lossis sprative.
Kev tshuaj xyuas kuj tseem ceeb heev. Txheeb xyuas cov tsis xws luag zoo li porosity (tshwm sim los ntawm kev paug lossis tsis txaus tiv thaiv), tawg (los ntawm cov cua txias sai), los ntawm cov cua sov ntau dhau). Cov teeb meem me me tuaj yeem kho los ntawm Rewelding nrog kho cov tsis muaj kev kho, tab sis kev tsis taus loj yuav xav hloov lub workpiece.
Cov lus qhia kawg rau kev ua tiav
Kev xyaum yog qhov tseem ceeb -} pib nrog seem ntawm tib alloy thiab tuab raws li koj txoj haujlwm kom zoo - ziab. Always use clean, dedicated tools (clamps, brushes, gloves) to avoid cross-contamination. Nco ntsoov: Stainless hlau vuam yog ntau li ntau txog kev khaws cia cov khoom siv kub ua ntej, thiab koj yuav ua tiav muaj zog, thiab cov khoom siv corrosion {{}} tiv taus welds.
Raws li kev thov rau stainless tus hlau loj hlob thoob plaws kev lag luam, mastering nws cov kev sib tw vuam dhau los ua muaj txiaj ntsig zoo. Los ntawm kev ua raws li cov kauj ruam no, ob tus kws tshaj lij thiab cov neeg nyiam ua kom nruj kev ua haujlwm nrog kev cog qoob loo nrog kev ntseeg siab, kom ntseeg ruaj khov, siab}- kev ua tau zoo.
