Stainless hlau yog cov khoom siv corrosion-resistant alloy, nyob rau hauv uas ib feem ntawm chromium ntxiv. Chromium plays lub luag haujlwm tseem ceeb hauv stainless hlau, ua rau nws tiv thaiv oxidation, corrosion-resistant thiab kub-resistant.
Chromium kev sib cuam tshuam nrog lwm cov ntsiab lus:
Chromium tsim ib qho kev daws teeb meem txuas ntxiv nrog hlau thiab txo cov theem austenite. Nws tsim ntau yam carbide nrog cov pa roj carbon monoxide, vim nws qhov kev sib raug zoo rau cov pa roj carbon ntau dua li cov hlau thiab manganese, txawm tias qis dua tungsten thiab molybdenum. Chromium thiab hlau kuj tuaj yeem tsim cov sib txuas sib txuas.
Influence ntawm Carbon:
Chromium txo qis cov pa roj carbon concentration hauv pearlite thiab txo qhov siab tshaj plaws solubility ntawm carbon hauv austenite.
Qhov cuam tshuam rau Austenite:
Nws slows tus decomposition tus nqi ntawm austenite, ho txhim kho cov hardenability ntawm hlau. Txawm li cas los xij, nws tseem tuaj yeem ua rau muaj kev nyiam rau kev npau taws.
Cov txiaj ntsig ntawm Chromium rau Cov Khoom Siv Hluav Taws Xob ntawm Cov Hlau Stainless:
1. Lub zog thiab hardness:
Chromium txhim kho lub zog thiab hardness ntawm hlau, tshwj xeeb tshaj yog thaum ua ke nrog lwm yam alloying ntsiab.
2. Kev hloov pauv kub:
Nws ho nce lub brittle hloov kub ntawm steel.
3. Kev cuam tshuam rau Toughness:
Hauv Fe-Cr alloys nrog cov ntsiab lus siab chromium, nag lossis daus ntawm theem tuaj yeem txo qhov cuam tshuam qhov hnyav.
Cov nyhuv ntawm Chromium rau lub cev, tshuaj, thiab txheej txheem ntawm Stainless hlau:
1. Hnav tsis kam:
Nws txhim kho qhov hnav tsis kam ntawm cov hlau thiab ua kom yooj yim dua kom ua tiav qhov siab tiav tom qab sib tsoo.
2. Cov khoom siv hluav taws xob:
Chromium txo cov hluav taws xob conductivity ntawm hlau thiab txo nws cov kub coefficient ntawm kuj.
3. Cov khoom sib nqus:
Nws ua rau kom lub zog quab yuam thiab qhov seem hlau nplaum induction, ua rau nws muaj txiaj ntsig hauv kev tsim cov hlau nplaum ruaj khov.
4. Corrosion Resistance:
Chromium txhawb kev tsim cov zaj duab xis passive ntawm cov hlau. Thaum cov ntsiab lus chromium ncav cuag, qhov corrosion kuj ntawm steel, tshwj xeeb tshaj yog tiv thaiv nitric acid, zoo heev. Txawm li cas los xij, yog tias chromium carbides precipitate, corrosion kuj txo.
5. Oxidation Resistance:
Nws txhim kho oxidation tsis kam ntawm hlau.
6. Dendritic Segregation:
Chromium tuaj yeem ua rau dendritic cais, txo cov yas ntawm cov hlau.
7. Thermal conductivity:
Chromium txo cov thermal conductivity ntawm hlau, xav tau cua sov qeeb thaum ua kub thiab txias txias tom qab forging thiab dov.
Kev siv ntawm Chromium hauv Stainless Hlau:
1. Alloy qauv hlau:
Chromium feem ntau yog siv nyob rau hauv alloy structural steel los txhim kho hardenability. Nws tuaj yeem tsim chromium carbides ntawm carburized nto, txhim kho kev hnav tsis kam.
2. Caij nplooj ntoos hlav hlau:
Chromium, nrog rau lwm yam alloying ntsiab, pab txhawb rau tag nrho cov kev ua tau zoo ntawm lub caij nplooj ntoos hlav steel.
3. Cov kabmob hlau:
Chromium pab tsim cov carbides tshwj xeeb uas ua rau kom hnav tsis kam thiab tso cai rau kev ua tiav siab tom qab sib tsoo hauv cov kabmob steel.
4. Cov cuab yeej hlau thiab cov hlau ceev ceev:
Hauv cov hlau no, chromium feem ntau yog siv los txhim kho kev hnav tsis kam thiab muab qee theem ntawm tempering stability thiab toughness.
5. Stainless thiab kub-Resistant hlau:
Chromium feem ntau ua ke nrog manganese, nitrogen, thiab npib tsib xee los ua cov hlau tsis muaj zog thiab kub-resistant. Txhawm rau tsim cov hlau austenitic, yuav tsum muaj qhov sib npaug ntawm ferrite-stabilizing chromium thiab austenite-stabilizing cov ntsiab lus xws li manganese thiab npib tsib xee.
Chromium plays lub luag haujlwm tseem ceeb hauv cov hlau tsis muaj steel, ua kom muaj zog xws li oxidation tsis kam, corrosion kuj, siab kub kam rau ua, thiab kev ua haujlwm zoo. Qhov sib ntxiv ntawm chromium ua rau cov hlau tsis muaj hlau yog cov khoom siv zoo siv dav hauv kev lag luam xws li aerospace, tshuaj ua haujlwm, thiab khoom noj khoom haus. Raws li kev tshawb fawb thiab thev naus laus zis txuas ntxiv mus, qhov kev thov rau kev ua tau zoo dua stainless hlau tau loj hlob, ua rau chromium lub luag haujlwm tseem ceeb. Nyob rau hauv lub neej yav tom ntej, nrog rau kev txhim kho ntxiv hauv cov khoom siv hlau alloy, kev ua haujlwm ntawm chromium hauv stainless hlau yuav raug tshawb nrhiav thiab siv hauv qhov tob dua.
