Nkag siab Stainless hlau screws Hom
Cia peb rhuav tshem txhua hom Stainless hlau screws, suav nrog lawv cov qib tshwj xeeb, yog li koj tuaj yeem pom tias lawv txawv li cas thiab lawv qhov zoo li cas.'
2.1 Austenitic Stainless hlau ntsia hlau
Austenitic stainless hlau yog feem ntau siv hom stainless hlau vim li cas. Nws muaj kev tiv thaiv corrosion zoo heev thiab siv rau ntau yam kev siv.
2.1.1 Cov Qib Siab
304 Stainless Hlau: Feem ntau hu ua "18-8" stainless hlau vim nws muaj 18% chromium thiab 8% npib tsib xee. Nws yog dav siv los ua screws vim nws qhov sib npaug ntawm lub zog thiab corrosion kuj.
316 Stainless Hlau: Muaj 16% chromium, 10% nickel, thiab 2% molybdenum. Cov khoom molybdenum muab nws zoo dua tiv thaiv chloride ib puag ncig, ua rau nws zoo tagnrho rau kev siv dej hiav txwv.
2.1.2 Nta thiab Cov Txheej Txheem
Muaj pes tsawg leeg: siab hauv chromium thiab npib tsib xee, qis hauv carbon.
Nta:
Zoo heev corrosion kuj.
Tsis yog -magnetic.
Zoo formability thiab weldability.
Thaum kuv ua hauj lwm rau tej yaam num ze ntawm ntug dej hiav txwv, kuv nyiam siv qib 316 screws vim lawv tuav tau zoo dua rau cua ntsev.
2.2 Ferritic Stainless hlau
Ferritic stainless hlau yog hlau nplaum thiab feem ntau muaj kev tiv thaiv zoo dua rau kev ntxhov siab corrosion tawg.
2.2.1 Cov Qib Siab
430 Stainless Hlau: Muaj 16-18% chromium thiab yog siv rau hauv cov ntaub ntawv kho kom zoo nkauj qhov twg corrosion kuj tsis yog qhov tseem ceeb.
Ref: 430 Stainless Hlau Paub meej
409 Stainless Hlau: Muaj cov ntsiab lus chromium qis dua li ntawm 11% thiab feem ntau yog siv rau hauv cov tshuab hluav taws xob hauv tsheb.
Ref: 409 Stainless Hlau Cov Lus Qhia
2.2.2 Properties thiab Composition
Muaj pes tsawg leeg: siab chromium, tsawg carbon, me ntsis los yog tsis muaj nickel.
Khoom:
Sib nqus.
Nruab nrab corrosion resistant.
Muaj kev tiv thaiv zoo rau kev ntxhov siab corrosion cracking.
Ferritic screws yog tus nqi - kev xaiv zoo, tab sis feem ntau kuv tsis txhob siv lawv nyob rau hauv ib puag ncig corrosive heev.
2.3 Martensitic Stainless hlau
Martensitic stainless hlau yog paub txog lawv lub zog siab thiab hardness tom qab kev kho cua sov.
2.3.1 Cov qhab nia
410 stainless hlau: muaj 11.5-13.5% chromium thiab tuaj yeem hardened los ntawm kev kho cua sov. Haum rau cov ntawv thov uas xav tau lub zog siab thiab nruab nrab corrosion kuj.
Ref: 410 stainless hlau specifications
420 stainless hlau: muaj cov ntsiab lus carbon ntau dua 410, siab dua hardness tab sis txo corrosion kuj.
Ref: 420 stainless hlau cov ntsiab lus
2.3.2 Khoom thiab muaj pes tsawg leeg
Muaj pes tsawg leeg: nruab nrab cov ntsiab lus chromium, siab dua cov ntsiab lus carbon.
Khoom:
Siab zog, siab hardness.
Sib nqus.
Tsawg corrosion kuj dua lwm yam stainless hlau.
Thaum kuv xav tau cov ntsia hlau uas tuaj yeem tiv taus hnav, xws li cov khoom siv kho tshuab, kuv xaiv cov qib martensitic.
2.4 Duplex stainless hlau (austenitic + ferritic)
Duplex stainless hlau muab cov khoom zoo tshaj plaws ntawm austenitic thiab ferritic steels.
2.4.1 Cov Qib Siab
2205 Duplex Stainless Hlau: Muaj 22% chromium, 5-6% nickel thiab 3% molybdenum. Nws muaj lub zog siab thiab zoo heev corrosion kuj.
Siv: Duplex 2205 Stainless Hlau Cov Ntaub Ntawv
2507 Super Duplex Stainless Hlau: Muaj 25% chromium, 7% npib tsib xee thiab 4% molybdenum, muaj zog tiv thaiv corrosion thiab zog.
Siv: Super Duplex 2507 Paub meej
2.4.2 Properties thiab Composition
Kev sib xyaw ua ke: Kev sib xyaw ua ke ntawm austenite thiab ferrite cov qauv, siab chromium, nruab nrab mus rau siab nickel thiab ntxiv molybdenum.
Khoom:
Siab zog.
Zoo heev tiv thaiv pitting thiab kev nyuaj siab corrosion cracking.
Sib nqus vim cov ntsiab lus ferrite.
Duplex screws yog qhov kev xaiv zoo yog tias koj nyob hauv ib puag ncig uas muaj zog thiab corrosion yog qhov tseem ceeb, xws li lub platform offshore.