Txheej Txheem Qhia Txog Cov Hlau Stainless
Hlau tsis xebIb hom hlau uas paub txog nws txoj kev tiv taus corrosion thiab tsis xeb, muaj tsawg kawg 10.5% chromium thiab siab tshaj 1.2% carbon.
Cov hlau tsis xeb yog ib yam khoom siv dav dav hauv ntau yam lag luam, paub zoo txog nws txoj kev tiv taus xeb thiab kev hloov pauv tau yooj yim. Ntawm ntau qib ntawm cov hlau tsis xeb, 304, 304H, 304L, thiab 316 yog cov feem ntau, raws li tau teev tseg hauv ASTM A240/A240M tus qauv rau "Chromium thiab Chromium-Nickel Stainless Steel Plate, Sheet, thiab Strip for Pressure Vessels and General Applications."
Plaub qib no yog tib pawg hlau. Lawv tuaj yeem raug faib ua cov hlau tsis xeb austenitic raws li lawv cov qauv thiab ua 300 series chromium-nickel stainless hlau raws li lawv cov khoom sib xyaw. Qhov sib txawv tseem ceeb ntawm lawv yog nyob rau hauv lawv cov tshuaj lom neeg sib xyaw, kev tiv thaiv corrosion, kev tiv thaiv kub, thiab cov teb siv.
Cov Hlau Stainless AusteniticFeem ntau yog ua los ntawm lub ntsej muag-centered cubic crystal structure (γ theem), tsis yog magnetic, thiab feem ntau yog strengthened los ntawm kev ua haujlwm txias (uas yuav ua rau muaj qee qhov magnetism). (GB/T 20878)
Kev Sib Piv Txog Cov Tshuaj Lom Zem thiab Kev Ua Haujlwm (Raws li ASTM Cov Qauv)
304 Cov Hlau Stainless:
- Cov Khoom Tseem CeebMuaj kwv yees li ntawm 17.5-19.5% chromium thiab 8-10.5% nickel, nrog rau me me ntawm cov pa roj carbon (qis dua 0.07%).
- Cov Khoom Siv Kho Tshuab: Qhia txog lub zog tensile zoo (515 MPa) thiab elongation (kwv yees li 40% lossis ntau dua).
304L Stainless Hlau:
- Cov Khoom Tseem CeebZoo ib yam li 304 tab sis muaj cov pa roj carbon tsawg dua (qis dua 0.03%).
- Cov Khoom Siv Kho TshuabVim yog cov pa roj carbon tsawg dua, lub zog tensile qis dua 304 (485 MPa), nrog rau tib lub elongation. Cov pa roj carbon tsawg dua ua rau nws txoj kev vuam zoo dua.
304H Stainless Hlau:
- Cov Khoom Tseem CeebFeem ntau cov pa roj carbon muaj txij li 0.04% txog 0.1%, nrog rau cov manganese txo qis (qis mus txog 0.8%) thiab cov silicon nce ntxiv (txog li 1.0-2.0%). Cov ntsiab lus ntawm Chromium thiab nickel zoo ib yam li 304.
- Cov Khoom Siv Kho TshuabLub zog tensile (515 MPa) thiab elongation zoo ib yam li 304. Nws muaj lub zog zoo thiab toughness ntawm qhov kub siab, ua rau nws haum rau qhov chaw kub siab.
316 Cov Hlau Stainless:
- Cov Khoom Tseem CeebMuaj 16-18% chromium, 10-14% nickel, thiab 2-3% molybdenum, nrog rau cov pa roj carbon tsawg dua 0.08%.
- Cov Khoom Siv Kho TshuabLub zog tensile (515 MPa) thiab elongation (ntau dua 40%). Nws muaj kev tiv thaiv corrosion zoo dua.
Los ntawm kev sib piv saum toj no, nws pom tseeb tias plaub qib muaj cov khoom siv kho tshuab zoo sib xws. Qhov sib txawv yog nyob rau hauv lawv cov khoom sib xyaw, uas ua rau muaj kev hloov pauv ntawm kev tiv taus corrosion thiab kev tiv taus kub.
Kev Sib Piv ntawm Kev Tiv Thaiv Kev Kub thiab Kev Tiv Thaiv Kev Kub ntawm Cov Hlau Stainless
Kev Tiv Thaiv Kev Xeb:
- 316 Cov Hlau StainlessVim muaj molybdenum, nws muaj kev tiv thaiv corrosion zoo dua li 304 series, tshwj xeeb tshaj yog tiv thaiv chloride corrosion.
- 304L Stainless Hlau: Nrog nws cov ntsiab lus carbon tsawg, nws kuj muaj kev tiv thaiv corrosion zoo, tsim nyog rau cov chaw corrosive. Nws qhov kev tiv thaiv corrosion yog qis dua me ntsis rau 316 tab sis nws pheej yig dua.
Kev Tiv Thaiv Kub:
- 316 Cov Hlau StainlessNws cov chromium-nickel-molybdenum muaj cov khoom sib xyaw ua ke zoo dua li 304 stainless hlau, tshwj xeeb tshaj yog nrog molybdenum ua rau nws tsis kam oxidation.
- 304H Stainless Hlau: Vim nws muaj cov pa roj carbon ntau, cov manganese tsawg, thiab cov silicon ntau, nws kuj ua rau nws tiv taus cua sov zoo ntawm qhov kub siab.
Cov Ntawv Thov Hlau Stainless
304 Cov Hlau Stainless: Ib qib hauv paus uas pheej yig thiab siv tau ntau yam, siv dav hauv kev tsim kho, kev tsim khoom, thiab kev ua zaub mov.
304L Stainless Hlau: Cov qauv uas muaj cov pa roj carbon tsawg ntawm 304, tsim nyog rau kev tsim tshuaj lom neeg thiab kev tsim kho hauv dej hiav txwv, nrog rau cov txheej txheem ua haujlwm zoo ib yam li 304 tab sis tsim nyog dua rau cov chaw uas xav tau kev tiv taus xeb ntau dua thiab kev pheej hmoo ntawm tus nqi.
304H Stainless HlauSiv rau hauv cov superheaters thiab reheaters ntawm cov boilers loj, cov kav dej ncu, cov khoom hloov pauv cua sov hauv kev lag luam petrochemical, thiab lwm yam kev siv uas xav tau kev tiv thaiv corrosion zoo thiab kev ua haujlwm kub siab.
316 Cov Hlau Stainless: Feem ntau siv rau hauv cov chaw tsim cov ntawv thiab cov ntawv, kev lag luam hnyav, cov khoom siv ua tshuaj lom neeg thiab khaws cia, cov khoom siv refining, cov khoom siv kho mob thiab tshuaj, roj thiab roj av hauv hiav txwv, cov chaw nyob hauv hiav txwv, thiab cov khoom siv ua noj ua haus zoo.
Lub sijhawm tshaj tawm: Cuaj hlis-24-2024