Cov teebmeem ntawm chromium ntawm microstructure thiab kev kho cua sov ntawm cov hlau yog raws li nram no:
1) Chromium tsim ib qho kev daws teeb meem txuas ntxiv nrog hlau, txo cov theem austenite. Chromium tsim ntau yam carbides nrog carbon, thiab nws affinity rau carbon yog ntau dua li ntawm cov hlau thiab manganese tab sis qis dua li ntawm tungsten, molybdenum, thiab lwm yam.
2) Chromium tuaj yeem txo cov pa roj carbon ntau hauv pearlite thiab qhov siab tshaj plaws solubility ntawm carbon hauv austenite.
3) Nws slows down lub decomposition tus nqi ntawm austenite, ho txhim kho lub hardenability ntawm hlau, tab sis kuj ua rau kom lub siab xav ntawm temper brittleness.
Cov teebmeem ntawm chromium ntawm cov khoom siv kho tshuab ntawm hlau yog raws li hauv qab no:
1) Nws nce lub zog thiab hardness ntawm steel, tshwj xeeb tshaj yog thaum ua ke nrog lwm yam alloying ntsiab.
2) Nws ua rau kom muaj zog-txheej hloov kub ntawm cov hlau.
3) Thaum cov ntsiab lus chromium siab, qhov cuam tshuam toughness ntawm cov hlau txo qis sharply.
Cov teebmeem ntawm chromium rau lub cev, tshuaj, thiab cov txheej txheem ntawm cov hlau yog raws li nram no:
1) Nws txhim kho qhov hnav tsis kam ntawm cov hlau thiab tso cai rau qis qhov roughness qhov tseem ceeb. Chromium plating yog siv dav hauv kev lag luam electroplating los txhim kho qhov hnav tsis kam thiab cov tsos ntawm cov khoom.
2) Nws txo cov hluav taws xob conductivity thiab kub coefficient ntawm cov hlau tsis kam.
3) Nws nce lub zog quab yuam thiab cov hlau nplaum seem ntawm cov hlau, dav siv hauv kev tsim cov cuab yeej hlau nplaum ruaj khov.
4) Chromium ua ib zaj duab xis passive ntawm cov hlau, ua kom nws cov corrosion kuj zoo. Txawm li cas los xij, thaum chromium carbides precipitate, corrosion kuj ntawm steel txo.
5) Nws txhim kho oxidation tsis kam ntawm hlau.
6) Chromium hauv hlau tuaj yeem ua rau dendritic cais, txo nws cov yas.
7) Chromium txo cov thermal conductivity ntawm hlau, yuav tsum tau cua sov qeeb thaum lub sij hawm thermal ua thiab qeeb txias tom qab forging los yog dov.
Kev siv cov chromium hauv steel muaj xws li:
- Stainless hlau: Chromium yog ib qho tseem ceeb alloying khoom nyob rau hauv stainless hlau, muab kev tiv thaiv corrosion thiab txhim kho txhua yam khoom.
- Cov cuab yeej hlau: Chromium feem ntau ntxiv rau cov cuab yeej steel los txhim kho lawv cov tawv tawv, hnav tsis kam, thiab kub hardness.
- Hnav-resistant steel: Chromium yog ntxiv los txhim kho kev hnav tsis kam ntawm cov hlau, ua rau nws tsim nyog rau kev siv hauv mining, kev tsim kho, thiab lwm yam lag luam.
- Kub-kub steel: Chromium yog ntxiv los txhim kho oxidation tsis kam thiab siab kub lub zog ntawm steel, ua rau nws haum rau siv nyob rau hauv high-kub ib puag ncig.
- Sib nqus hlau: Chromium yog siv los tsim cov hlau nplaum, uas yog siv rau hauv ntau yam khoom siv hluav taws xob thiab hluav taws xob.
Zuag qhia tag nrho, chromium plays lub luag haujlwm tseem ceeb hauv kev txhim kho cov khoom ntawm cov hlau thiab nthuav nws cov ntawv thov hauv ntau yam lag luam.
