Ni/Mo 합금분말(FLC-4608)의 소결경화 공정에서 유한요소법을 이용한 마르텐사이트 분율의 예측
Prediction of Martensite Fraction in the Sintering Hardening Process of Ni/Mo Alloy Powder (FLC-4608) Using the Finite Element Method
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In recent years, industrial demands for superior mechanical properties of powder metallurgy steel componentswith low cost are rapidly growing. Sinter hardening that combines sintering and heat treatment in continuous onestep is cost-effective. The cooling rate during the sinter hardening process dominates material microstructures, whichfinally determine the mechanical properties of the parts. This research establishes a numerical model of the relationbetween various cooling rates and microstructures in a sinter hardenable material. The evolution of a martensitic phasein the treated microstructure during end quench tests using various cooling media of water, oil, and air is predicted fromthe cooling rate, which is influenced by cooling conditions, using the finite element method simulations. The effects ofthe cooling condition on the microstructure of the sinter hardening material are found. The obtained limiting size of thesinter hardening part is helpful to design complicate shaped components.
Abstract
In recent years, industrial demands for superior mechanical properties of powder metallurgy steel componentswith low cost are rapidly growing. Sinter hardening that combines sintering and heat treatment in continuous onestep is cost-effective. The cooling rate during the sinter hardening process dominates material microstructures, whichfinally determine the mechanical properties of the parts. This research establishes a numerical model of the relationbetween various cooling rates and microstructures in a sinter hardenable material. The evolution of a martensitic phasein the treated microstructure during end quench tests using various cooling media of water, oil, and air is predicted fromthe cooling rate, which is influenced by cooling conditions, using the finite element method simulations. The effects ofthe cooling condition on the microstructure of the sinter hardening material are found. The obtained limiting size of thesinter hardening part is helpful to design complicate shaped components.
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