Technically hais lus, cov txheej txheem ntawm cov nplooj ntawv tooj dag feem ntau suav nrog smelting, casting, dov, thiab annealing. Ua ntej, ntshiab tooj liab thiab zinc yog smelted rau hauv cov kua alloy hauv ib qho kev faib ua feem, thiab tom qab ntawd txias rau hauv daim ntawv ua ntej siv cov txheej txheem casting. Tom ntej no, daim ntawv yog dov ntau zaus siv cov khoom siv dov kom tau qhov xav tau tuab thiab qhov zoo. Thaum kawg, annealing yog ua los tshem tawm cov kev ntxhov siab sab hauv tsim thaum dov, txhim kho lub toughness thiab machinability ntawm daim ntawv tooj dag.
