Qhov zoo ntawm cov hlau tsim feem ntau yog suav nrog cov hauv qab no:
Muaj zog hloov tau: kev siv tshuab hlau yog haum rau ntau cov ntaub ntawv alloy. Txawm hais tias nws yog tsawg melting-point siv hlau xws li aluminium thiab tooj liab, lossis cov neeg siv nyiaj npib siab xws li cov txheej txheem sib txawv, lawv tuaj yeem ua tiav los ntawm cov txheej txheem sib txawv.
Kev tsim cov khoom lag luam ntawm cov khoom lag luam uas yog tsim cov khoom siv ntau ntxiv tuaj yeem tsim cov chaw uas muaj cov duab nyuaj, tshwj xeeb tshaj plaws hauv kab noj kab noj kab noj hniav. Piv txwv li, cov xuab zeb casting yog qhov tsim nyog rau kev tsim cov kab uas muaj cov kab ke nrog cov duab sib xyaw thiab cov ntsiab lus siab.
Cov cuab yeej siv dav: Kev siv tshuab hlau siv tau ntau yam hlau cov ntaub ntawv, nrog rau cov khoom siv hluav taws xob, uas muaj cov nqi thiab txhim kho kev siv.
Cov peev txheej qis peev: piv nrog lwm cov txheej txheem tsim khoom, tus nqi peev ntawm cov khoom siv hlau qis dua, tshwj xeeb tshaj yog rau kev lag luam me me, cov txheej txheem no muaj kev lag luam ntau dua.
Kev tsim kho siab: qee cov txheej txheem hlau ua, xws li kev ua tau zoo, haum rau kev ua kom tau zoo hauv siab, haum loj ntau pawg ntau lawm.
Ruaj khov ua tau zoo: Cov txheej txheem hlau tuaj yeem tsim cov khoom lag luam uas muaj cov kua ruaj khov, tshwj xeeb tshaj yog nyob rau hauv siab cov kua, thiab cov khoom lag luam zoo nyob rau hauv siab thiab qhov ntev yog ruaj khov.
Cov phooj ywg ib puag ncig: qee cov txheej txheem hlau ua, xws li hlau cores, uas txo cov pa roj hmab thiab teeb meem roj thiab txhim kho kev ua haujlwm.