Ferrous Metals vs Non Ferrous Metals
ferrous hlau thiab cov hlau tsis muaj ferrous yog subdivisions ntawm cov hlau. Cov khoom siv tshuaj muaj nyob hauv cov xwm txheej tau muab faib ua ob pawg, hlau thiab tsis yog hlau. Cov hlau yog cov khoom siv hluav taws xob zoo ntawm hluav taws xob thiab cua sov, tuaj yeem ua tau yooj yim thiab ductile, thiab muaj lub ntsej muag ci. Cov hlau tau muab faib ua ob pawg hu ua ferrous hlau thiab cov hlau tsis muaj hlau. Lo lus ferrous los ntawm Latin lo lus Ferrum uas txhais tau tias txhua yam uas muaj hlau. Yog li ntawd, ferrous hlau yog cov uas muaj hlau nyob rau hauv ib co qauv thiab feem pua. Vim muaj cov hlau, ferrous hlau yog hlau nplaum nyob rau hauv cov khoom thiab cov cuab yeej no txawv lawv ntawm cov hlau uas tsis yog ferrous. Ferrous hlau kuj muaj lub zog tensile siab. Qee qhov piv txwv ntawm ferrous hlau yog carbon steel, stainless hlau thiab wrought hlau. Qee qhov piv txwv ntawm cov hlau tsis muaj hlau yog txhuas, tooj dag, tooj liab thiab lwm yam.
Cov hlau tsis muaj ferrous muaj cov khoom sib txawv ntawm cov hlau ferrous thiab siv rau kev lag luam. Lawv feem ntau yog siv los ntawm kev txo qis, lub zog ntau dua, cov khoom tsis sib nqus, cov ntsiab lus melting ntau dua thiab tsis kam tiv thaiv corrosion, txawm tias muaj tshuaj lom neeg lossis cua. Cov hlau uas tsis yog ferrous no kuj zoo tagnrho rau kev siv hluav taws xob thiab hluav taws xob.
Yog li nws paub tseeb tias cov hlau tsis muaj hlau yog cov hlau uas tsis muaj hlau lossis cov hlau tsis muaj hlau uas tsis muaj hlau ua ib feem. Feem ntau, tab sis tsis yog tag nrho, ferrous hlau yog sib nqus nyob rau hauv qhov tab sis nyob rau hauv magnetism, ferrous hlau txawv nyob ntawm seb cov hlau lawv muaj. Stainless hlau, txawm hais tias nws muaj cov hlau tsis yog hlau nplaum vim yog cov txheej txheem uas ua rau nws tsis muaj zog. Nws tau muab tso rau hauv nitric acid kom tshem tau cov hlau thiab qhov seem yog ntau cov npib tsib xee yog li ua rau nws tsis sib nqus txawm tias nws tseem faib ua cov hlau ferrous. Ferrous hlau paub txog lawv lub peev xwm tso cai rau oxidation uas yog cov cuab yeej hu ua corrosion. Oxidation ntawm ferrous hlau tuaj yeem pom nyob rau hauv cov xim liab liab tso rau ntawm qhov chaw uas yog oxide ntawm hlau.
