Nws yog ib qho tsim nyog los ua kev kho cua sov tom qabforgingvim nws lub hom phiaj yog kom tshem tawm cov kev ntxhov siab sab hauv tom qab forging. Kho cov forging hardness, txhim kho cov kev ua haujlwm txiav; Coarse nplej nyob rau hauv cov txheej txheem forging yog refined thiab uniform los npaj cov microstructure ntawm qhov chaw rau kev kho cua sov.

1. Kub kub tempering: txo cov hardness, txo los yog tshem tawm cov kev ntxhov siab generated thaum normalizing txias, txhim kho plasticity thiab toughness. Haum rau cov hlau alloy nrog siab hardness tom qab normalizing.

2. Ua kom tiav annealing: tshem tawm cov ntxhib thiab tsis sib xws ntawm cov txheej txheem forging, refine cov nplej, tshem tawm cov residual kev nyuaj siab ntawm forging, txo cov hardness, txhim kho lub machinability, thiab npaj lub koom haum rau yav tom ntej kev kho cua sov ntawm qhov chaw. Tag nrho annealing feem ntau haum rau cov hlau hypoeutecoid.

3. Isothermal annealing: tau cov qauv zoo dua li kev ua kom tiav, tshem tawm kev ntxhov siab, txo cov tawv nqaij. Hauv qhov tseem ceeb loj forgings, nws kuj tseem siv tau los diffuse hydrogen thiab tiv thaiv kev tsim cov pob dawb. Piv nrog rau kev ua tiav annealing, nws tuaj yeem txo lub sijhawm annealing thiab txhim kho kev tsim khoom.

4. Normalizing: finer pearlite tuaj yeem tau los kho lub koom haum; Txhim khoforgingslub zog thiab toughness, txo cov kev ntxhov siab sab hauv, txhim kho kev ua haujlwm; Rau eutecoid steel. Mesh carbides tuaj yeem raug tshem tawm.

5 spheroidization annealing: kom tau txais spherical cementite thiab ferrite qauv, tsis tsuas yog txo cov hardness, thiab nyob rau hauv cov txheej txheem txiav yog ib qho yooj yim kom tau smooth ua nto, nyob rau hauv lub tom ntej quenching yog tsis yooj yim los tsim deformation tawg. Spheroidizing annealing yog tsim rau siab carbon steel thiab siab carbon alloy tuag steel.