발간논문

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Vol.22, No.5, 468 ~ 475, 1984
Title
Effect of Deformation on Precipitation Hardening Behavior in 18% Ni cobalt Free Maraging Steel
최호현Ho Hyun Choi, 최종술Chong Sool Choi, 양훈영Hoon Yung Young
Abstract
Precipitation hardening behavior in 18%Ni cobalt free managing steel was studied by X-ray diffraction test, replica electron microscopic observation and hardness test. Precipitation hardening rate in early stage of aging was decreased with increasing deformation degree. This is because the precipitation occurred during rolling at room temperature. The precipitated phase in 18%Ni cobalt free managing steel was confirmed to be intermetallic compounds such as Ni₃Mo, FeMo and Fe₂Mo by X-ray diffraction test. At aging of 20 hours at 482℃ in 70%-cold rolled managing steel, small amount of the decomposed austenite was detected by the X-ray diffraction test.
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