Thaum twgwelding stainless hlau, kev ua tau zoo ntawm cov electrode yuav tsum ua kom haum rau lub hom phiaj ntawm cov hlau tsis huv.Stainless hlau electrode yuav tsum raug xaiv raws li lub hauv paus hlau thiab kev ua haujlwm (nrog rau kev ua haujlwm kub, tiv tauj nruab nrab, thiab lwm yam).
Plaub hom stainless hlau thiab alloying ntsiab yog siv
Stainless hlau tuaj yeem muab faib ua plaub hom: Austenitic, martensitic, ferritic thiab biphase stainless hlau, raws li qhia hauv Table 1.
Qhov no yog raws li cov qauv metallographic ntawm stainless hlau ntawm chav tsev kub.Thaum me ntsis steel yog rhuab rau1550° F, cov qauv hloov ntawm chav tsev kub ferrite theem mus rau austenitic theem.Thaum txias, cov qauv hlau me me tau hloov mus rau hauv ferrite.Cov qauv Austenitic tam sim no nyob rau ntawm qhov kub thiab txias tsis yog hlau nplaum thiab muaj zog thiab tawv dua li chav tsev kub ferrite qauv.
Yuav ua li cas xaiv qhov zoo stainless hlau vuam khoom?
Yog tias cov khoom siv hauv paus zoo ib yam, thawj txoj cai yog "muab cov khoom siv hauv paus".Piv txwv li, xaiv cov khoom siv vuam rau310 or 316stainless hlau.
Rau vuam cov ntaub ntawv sib txawv, cov txheej txheem ntawm kev xaiv cov khoom siv hauv paus nrog cov ntsiab lus siab alloying yog ua raws.Piv txwv li, yog 304 lossis 316 stainless hlau yog welded, xaiv hom316.
Tab sis kuj tseem muaj ntau yam tsis ua raws li "kev sib piv cov khoom siv" hauv paus ntsiab lus ntawm qhov xwm txheej tshwj xeeb, tom qab ntawd nws yog qhov yuav tsum tau "sib tham nrog lub rooj xaiv cov khoom siv vuam".Piv txwv li, hom304stainless hlau yog lub hauv paus hlau feem ntau, tab sis tsis muaj hom304electrode.
Yog hais tias cov khoom siv vuam yog txuam nrog cov khoom siv hauv paus, yuav ua li cas xaiv cov khoom siv vuam rau vuam304stainless hlau?
Thaum vuam304stainless hlau, siv hom308welding khoom, vim hais tias cov ntsiab lus ntxiv hauv308stainless hlau tuaj yeem txhim kho qhov chaw vuam zoo dua.
308L kuj yog ib qho kev xaiv tau.L txhais tau tias cov ntsiab lus qis carbon,3XXL stainless hlau carbon cov ntsiab lus ≤0.03 ib%, thiab tus qauv3 XXIVstainless hlau tuaj yeem muaj txog li0.08%cov ntsiab lus carbon.
Vim tias L-shaped welding belongs rau tib hom kev faib ua tsis yog-L-zoo li vuam, cov tuam txhab tsim khoom yuav tsum tau saib xyuas tshwj xeeb rau kev siv L-shaped vuam vim tias nws cov ntsiab lus tsis tshua muaj carbon yuav txo tau qhov kev xav ntawm intergranular corrosion (saib daim duab 1).
Yuav ua li cas weld stainless hlau thiab carbon hlau?
Txhawm rau txo cov nqi, qee cov qauv welded ib txheej ntawm corrosion kuj rau saum npoo ntawm cov hlau.Thaum vuam cov khoom siv hauv paus tsis muaj cov ntsiab lus alloying nrog cov khoom siv hauv paus nrog cov ntsiab lus alloying, siv cov khoom siv vuam nrog cov ntsiab lus siab dua kom sib npaug ntawm qhov sib npaug hauv qhov vuam.
Thaum welding carbon steel nrog304 or 316stainless hlau thiab lwm yam stainless hlau tsis sib xws (saib Table 2),309L welding khoomyuav tsum tau txiav txim siab nyob rau hauv feem ntau.Yog tias koj xav tau cov ntsiab lus Cr siab dua, xaiv hom312.
Dab tsi yog qhov tsim nyog kev ua haujlwm ua ntej vuam?
Thaum vuam nrog lwm cov ntaub ntawv, thawj zaug tshem cov roj, cov cim thiab plua plav nrog cov kuab tshuaj tsis muaj tshuaj chlorine.Tsis tas li ntawd, thawj qhov uas yuav tsum tau them sai sai rau thaum vuam stainless hlau yog kom tsis txhob muaj kuab paug los ntawm carbon steel thiab cuam tshuam rau corrosion kuj.Qee lub tuam txhab khaws cov hlau tsis muaj steel thiab carbon hlau sib cais kom tsis txhob muaj kev sib kis.Siv cov kev sib tsoo tshwj xeeb thiab cov txhuam hniav rau cov hlau tsis muaj steel thaum tu thaj tsam ntawm qhov zawj.Qee lub sij hawm qhov sib koom ua ke yuav tsum tau ntxuav ob zaug.Vim hais tias cov electrode them nyiaj ua haujlwm ntawm stainless hlau vuam yog qhov nyuaj dua li ntawm cov hlau vuam, kev sib koom ua ke yog qhov tseem ceeb heev.
Post lub sij hawm: May-09-2023