Plaub hom stainless hlau thiab lub luag haujlwm ntawm alloying ntsiab:
Stainless hlau yuav tau faib ua plaub hom tseem ceeb: martensitic, martenitic, ferritic, thiab duplex stainless hlau (rooj 1). Qhov kev faib tawm no yog ua raws li cov microstructure ntawm stainless hlau ntawm chav tsev kub. When low-carbon steel is heated to 1550°C, its microstructure changes from room-temperature ferrite to austenite. Thaum txias txias, lub microstructure kev cai rau ferrite. Austenite, uas muaj nyob rau ntawm qhov kub, tsis yog-sib nqus thiab feem ntau muaj qis dua dag zog tab sis zoo dua ductility piv rau chav-kub ferrite.
Thaum cov chromium (CR) cov ntsiab lus tshaj 16%, chav-kub microstructure yuav tsau nyob rau theem ferrite ntawm txhua qhov kub thiab txias. Hom no yog xa mus rau raws li cov hlau ferritic stainless. Thaum ob qho tib si chromium (CR) cov ntsiab lus siab dua 17% thiab lub tsib) cov ntsiab lus yog ib qho chaw ruaj khov lawm, tswj cov Austenite los ntawm tsawg kub.
Austenitic Stainless hlau yog ib txwm hu rau yog "CR-n" hom, thaum Martensitic thiab Ferritic Stainless hlau tau ncaj qha hu ncaj qha "CR" hom. Cov ntsiab hauv cov hlau stainless thiab cov hlau ua ke tuaj yeem raug faib ua cov khoom siv thiab cov khoom siv ferrite-ua. Cov ntsiab lus Austenite-sib piv nrog NI, C, MN, thiab n, thaum thawj cov khoom sib xyaw ua ke suav nrog CR, SI, thiab NB. Kho cov ntsiab lus ntawm cov ntsiab no tuaj yeem tswj tau cov feem ntawm ferrite hauv weld sib koom tes.
Anustenitic Stainless Hlau, tshwj xeeb tshaj yog thaum muaj tsawg dua 5% nitrogen (n), yooj yim dua rau weld thiab muaj zoo dua veel hlau nrog qis n cov ntsiab lus. Austenitic Stainless Hlau Weld pob qij txha ua kom pom lub zog zoo thiab ductility, feem ntau tshem tawm cov kev xav tau ua ntej vuam thiab tom qab vuam kev kho cua sov. Nyob rau hauv lub tshav pob ntawm stainless hlau vuam, ustenitic stainless hlau nyiaj rau 80% ntawm txhua qhov kev siv hlau stainless hlau, ua rau nws lub hom phiaj tseem ceeb ntawm cov lus no.
Yuav ua li cas xaiv qhov raugStainless hlau vuamConsumables, xaim thiab elecodes?
Yog tias cov khoom siv niam txiv yog tib yam, thawj txoj cai yog "phim cov khoom siv ntawm niam txiv." Piv txwv li, yog tias cov thee txuas nrog 310 lossis 316 stainless hlau, xaiv cov qauv cov khoom siv thee. Thaum vuam tawm cov ntaub ntawv tsis sib xws, ua raws cov lus qhia ntawm kev xaiv cov khoom siv hauv paus uas phim cov ntsiab lus siab sib xws. Piv txwv li, thaum vuam 304 thiab 316 Stainless hlau, xaiv 316 hom 316 hom vuam consumables. Txawm li cas los xij, kuj tseem muaj ntau kis tshwj xeeb uas lub hauv paus ntsiab lus ntawm "txuam nrog lub hauv paus hlau" tsis ua raws. Hauv cov xwm txheej no, nws tau tshawb xyuas kom "saib mus rau Vuam Cartical CARD CART.". Piv txwv li, hom 304 stainless hlau yog qhov tseem ceeb tshaj plaws cov khoom siv, tab sis tsis muaj hom 304 vuam pas nrig.
Yog tias cov khoom siv vuam yuav tsum tau phim cov hlau hauv paus, yuav ua li cas xaiv cov vuam cov khoom rau weld 304 stainless hlau hlau thiab electrode?
Thaum vuam 304 stainless hlau, siv hom 308 vuam celumables vim tias cov ntsiab lus ntxiv nyob rau hauv 308 stainless hlau tuaj yeem ua rau muaj chaw weld. Lub 308L tseem yog qhov xaiv tau. Kuv qhia cov ntsiab lus carbon tsawg, 3xxl stainless cov ntsiab lus qhia tau cov ntsiab lus carbon ntawm 0.03%, thaum tus qauv 3xx stainless hlau tuaj yeem muaj txog 0.08% cov ntsiab lus carbon. Txij li L-hom vuam cov neeg siv tau ua rau tib txoj kev faib tawm uas tsis yog-L-hom cov ntsiab lus ntawm kev sib cais vim tias nws cov pa roj carbon ntau tuaj yeem txo cov kev nyiam ntawm kev sib cais Qhov tseeb, tus kws sau ntseeg hais tias yog cov chaw tsim khoom xav tau txhim kho lawv cov khoom lag luam, l-puab cov khoom daj yuav siv ntau dua. Cov neeg tsim khoom uas siv cov kev lag luam gmaw vuam yog kuj tseem siv 3xxsi hom stainless vim Si tuaj yeem txhim kho ntub dej thiab xau dej seem. Nyob rau hauv rooj plaub uas cov thee lub ncov los yog cov vuam pas dej hlau uas tsis zoo los yog lap Welding thiab txhim kho tus nqi tso cai Cov.
Lub Sijhawm Post: Sep-26-2023