Muaj pes tsawg leeg Ntawm Cov Hlau Stainless

Cov khoom tseem ceeb ntawm stainless hlau yog Cr (chromium), tsuas yog thaum Cr ntsiab lus mus txog ib qho nqi, steel xeb tsis kam.Yog li ntawv, cov hlau khov (Cr) cov ntsiab lus tsawg kawg yog 10.5%.

Lub pas hlau tseem muaj Ni, Ti, Mn, N, Nb, Mo, Si, Cu thiab lwm yam ntsiab lus.Qhov tsis kam tiv thaiv cov xeb hlau txo nrog qhov nce ntawm cov ntsiab lus carbon, yog li ntawd, cov ntsiab lus carbon ntawm feem ntau ntawm cov hlau tsis tshua muaj, qhov siab tshaj plaws tsis ntau tshaj li 1.2%, qee cov hlau Ω C (cov ntsiab lus carbon) txawm tsawg dua 0.03% (xws raws li 00Cr12).

Chromium yog qhov tseem ceeb tshaj plaws alloying keeb hauv austenitic stainless hlau. Cov xeb tiv thaiv xeb thiab tiv thaiv corrosion ntawm austenitic stainless hlau feem ntau vim yog qhov tseeb tias chromium txhawb qhov passivation ntawm cov hlau thiab ua kom cov steel ruaj khov thiab tsis meej nyob rau hauv kev ua ntawm cov hlau.

Hauv austenitic stainless hlau, chromium yog ib qho khoom uas ua kom muaj zog thiab ua kom ruaj khov ntawm ferrite thiab txo qhov austenitic cheeb tsam. Nrog rau qhov nce ntawm cov ntsiab lus hauv cov hlau, ferrite (δ) cov qauv tuaj yeem tshwm tuaj yeem hauv austenitic stainless hlau.

Kev tshawb fawb qhia tau tias hauv Cr-Ni austenitic stainless hlau, thaum cov ntsiab lus carbon yog 0.1% thiab cov ntsiab lus chromium yog 18%, txhawm rau kom tau txais cov txheej txheem austenitic ruaj khov, cov ntsiab lus nickel yog qhov qis tshaj, kwv yees li 8%. Txog qhov no, cov khoom siv dav siv 18Cr-8Ni hom Cr-Ni austenitic stainless hlau yog qhov feem ntau haum ntawm chromium thiab npib tsib xee.