Yuav ua li cas xaiv cov khoom siv vuam rau stainless hlau vuam hlau thiab electrode?

Plaub Hom Stainless Hlau thiab Lub Luag Haujlwm ntawm Alloying Elements:

Stainless hlau tuaj yeem muab faib ua plaub hom: austenitic, martensitic, ferritic, thiab duplex stainless hlau (Table 1).Qhov kev faib tawm no yog nyob ntawm microstructure ntawm stainless hlau ntawm chav tsev kub.Thaum cov hlau tsis tshua muaj cua sov rau 1550 ° C, nws cov microstructure hloov ntawm chav tsev kub ferrite mus rau austenite.Thaum txias, lub microstructure rov qab mus rau ferrite.Austenite, uas muaj nyob rau ntawm qhov kub thiab txias, tsis yog-sib nqus thiab feem ntau muaj qis zog tab sis zoo dua ductility piv rau chav tsev kub ferrite.

Thaum cov ntsiab lus chromium (Cr) nyob rau hauv cov hlau ntau tshaj 16%, chav tsev-kub microstructure yuav tsau nyob rau hauv lub ferrite theem, tswj ferrite ntawm txhua qhov kub thiab txias.Hom no yog hu ua ferritic stainless hlau.Thaum ob qho tib si chromium (Cr) cov ntsiab lus siab dua 17% thiab cov ntsiab lus npib tsib xee (Ni) yog siab dua 7%, lub austenite theem yuav ruaj khov, tswj austenite los ntawm qhov kub thiab txias mus txog qhov melting point.

Austenitic stainless hlau feem ntau hu ua "Cr-N" hom, thaum martensitic thiab ferritic stainless hlau ncaj qha hu ua "Cr" hom.Cov ntsiab lus nyob rau hauv stainless hlau thiab muab tub lim hlau tuaj yeem muab faib ua austenite-forming ntsiab thiab ferrite-forming ntsiab.Cov thawj austenite-forming ntsiab muaj xws li Ni, C, Mn, thiab N, thaum lub ntsiab ferrite-forming ntsiab muaj xws li Cr, Si, Mo, thiab Nb.Kev kho cov ntsiab lus ntawm cov ntsiab lus no tuaj yeem tswj tau qhov kev faib ua feem ntawm ferrite hauv qhov sib koom ua ke.

Austenitic stainless hlau, tshwj xeeb tshaj yog thaum muaj tsawg dua 5% nitrogen (N), yooj yim rau vuam thiab muab vuam zoo dua piv rau stainless hlau nrog qis N cov ntsiab lus.Austenitic stainless hlau weld pob qij txha muaj lub zog zoo thiab ductility, feem ntau tshem tawm qhov xav tau rau kev kho mob ua ntej thiab tom qab vuam.Nyob rau hauv lub tshav pob ntawm stainless hlau welding, austenitic stainless hlau account rau 80% ntawm tag nrho cov stainless steel siv, ua nws lub hom phiaj tseem ceeb ntawm tsab xov xwm no.

Yuav ua li cas xaiv qhov raugstainless hlau weldingConsumables, xov hlau thiab electrodes?

Yog tias cov ntaub ntawv niam txiv zoo ib yam, thawj txoj cai yog "muab cov ntaub ntawv niam txiv."Piv txwv li, yog tias cov thee txuas nrog 310 lossis 316 stainless hlau, xaiv cov khoom siv sib txuas.Thaum vuam cov ntaub ntawv sib txawv, ua raws li cov lus qhia ntawm kev xaiv cov khoom siv hauv paus uas phim cov ntsiab lus siab alloying.Piv txwv li, thaum vuam 304 thiab 316 stainless hlau, xaiv 316 hom vuam consumables.Txawm li cas los xij, kuj tseem muaj ntau qhov tshwj xeeb uas cov hauv paus ntsiab lus ntawm "muab lub hauv paus hlau" tsis ua raws.Hauv qhov xwm txheej no, nws raug nquahu kom "xa mus rau daim ntawv xaiv cov khoom siv vuam vuam."Piv txwv li, hom 304 stainless hlau yog cov khoom siv ntau tshaj plaws, tab sis tsis muaj hom 304 vuam pas nrig.

Yog tias cov khoom siv vuam xav tau kom haum cov hlau hauv qab, yuav ua li cas xaiv cov khoom siv vuam rau vuam 304 stainless hlau hlau thiab electrode?

Thaum welding 304 stainless hlau, siv hom 308 welding consumables vim hais tias cov ntsiab lus ntxiv hauv 308 stainless hlau tuaj yeem txhim kho qhov chaw vuam zoo dua.308L kuj yog ib qho kev xaiv tau.L qhia txog cov ntsiab lus tsis tshua muaj carbon, 3XXL stainless hlau qhia cov ntsiab lus carbon ntawm 0.03%, thaum tus qauv 3XX stainless hlau tuaj yeem muaj txog li 0.08% cov ntsiab lus carbon.Txij li L-hom welding consumables belongs rau tib hom kev faib raws li cov uas tsis yog-L-hom vuam consumables, manufacturers yuav tsum xav txog siv L-hom welding consumables cais vim nws cov ntsiab lus uas tsis muaj carbon yuav txo tau cov nyiam ntawm intergranular corrosion.Qhov tseeb, tus sau ntseeg tias yog cov tuam txhab xav hloov kho lawv cov khoom, L-shaped daj cov ntaub ntawv yuav siv dav dua.Cov neeg tsim khoom siv GMAW vuam txoj kev kuj tseem txiav txim siab siv 3XXSi hom stainless hlau vim tias SI tuaj yeem txhim kho cov ntaub ntub dej thiab cov khoom xau.Nyob rau hauv cov ntaub ntawv uas cov thee piece muaj lub ncov siab dua los yog lub vuam pas dej ua ke yog tsis zoo nyob rau hauv lub weld ntiv taw ntawm lub kaum sab xis qeeb seam los yog lap weld, kev siv cov roj shielded vuam hlau uas muaj S tuaj yeem moisten lub coal seam thiab txhim kho tus nqi deposition. .