Ntawm ntau hom stainless hlau, qib 304, 304L, thiab 304H feem ntau yog siv. Txawm hais tias lawv yuav zoo sib xws, txhua qib muaj nws tus kheej cov khoom thiab kev siv.
Qib304 stainless hlauyog qhov feem ntau siv thiab ntau yam ntawm 300 series stainless hlau. Nws muaj 18-20% chromium thiab 8-10.5% npib tsib xee, nrog rau me me ntawm carbon, manganese, thiab silicon. Qib no muaj kev tiv thaiv corrosion zoo heev thiab zoo formability. Nws feem ntau yog siv rau hauv cov ntawv thov xws li cov khoom siv hauv chav ua noj, kev ua zaub mov, thiab kev kho vaj tse.
304L stainless hlau yeeb nkabyog cov pa roj carbon tsawg ntawm cov yeeb nkab sib txawv ntawm qib 304, nrog cov ntsiab lus siab tshaj plaws ntawm 0.03%. Cov ntsiab lus qis carbon no pab txo qis carbide nag lossis daus thaum lub sijhawm vuam, ua rau nws tsim nyog rau kev siv vuam. Cov ntsiab lus qis carbon kuj txo qhov kev pheej hmoo ntawm kev nkag siab, uas yog tsim cov chromium carbides ntawm cov ciam teb, uas tuaj yeem ua rau intergranular corrosion. 304L feem ntau yog siv rau hauv kev siv vuam, nrog rau cov chaw uas muaj kev pheej hmoo ntawm corrosion yog ib qho kev txhawj xeeb, xws li kev ua tshuaj thiab cov khoom siv tshuaj.
304H stainless hlauyog cov pa roj carbon ntau dua ntawm qib 304, nrog cov ntsiab lus carbon xws li 0.04-0.10%. Cov ntsiab lus ntawm cov pa roj carbon ntau dua muab qhov zoo dua qhov kub thiab txias zog thiab nkag siab tsis kam. Qhov no ua rau 304H haum rau cov ntawv thov kub, xws li cov hlab ntsha siab, cov khoom siv hluav taws xob, thiab cov boilers muaj. Txawm li cas los xij, cov ntsiab lus ntawm cov pa roj carbon ntau dua kuj ua rau 304H muaj kev cuam tshuam ntau dua rau kev nkag siab thiab kev cuam tshuam ntawm intergranular, tshwj xeeb tshaj yog nyob rau hauv daim ntawv thov vuam.
Hauv cov ntsiab lus, qhov sib txawv tseem ceeb ntawm cov qib no yog lawv cov ntsiab lus ntawm cov pa roj carbon monoxide thiab cuam tshuam rau kev siv vuam thiab kub kub. Qib 304 yog qhov siv dav tshaj plaws thiab lub hom phiaj dav dav, thaum 304L yog qhov kev xaiv zoo tshaj plaws rau kev siv vuam thiab ib puag ncig uas muaj kev txhawj xeeb. 304H muaj cov ntsiab lus carbon ntau dua thiab tsim nyog rau cov ntawv thov kub, tab sis nws qhov cuam tshuam rau kev nkag siab thiab kev cuam tshuam ntawm intergranular yuav tsum tau ua tib zoo xav. Thaum xaiv cov qib no, nws yog ib qho tseem ceeb uas yuav tsum xav txog cov kev cai tshwj xeeb ntawm daim ntawv thov, suav nrog qhov chaw ua haujlwm, qhov kub thiab txias, thiab kev xav tau vuam.
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Post lub sij hawm: Aug-08-2024