발간논문

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Vol.38, No.9, 1210 ~ 1216, 2000
Title
The Thermal Fatigue Property of HSLA Cast Steels and Effect of Addition Elements
박재현Jai Hyun Park,김호준Ho Joon Kim,김인배In Bae Kim,김학모Hak Mo Kim
Abstract
The comparison of fatigue lifes between C-Mn(SC42) cast steel and HSLA cast steels and the effects of addition elements on thermal fatigue properties of HSLA(High Strength Low Alloy) cast steels have been investigated by a thermal fatigue test machine. The thermal fatigue resistance of HSLA cast steels was superior to that of SC42 cast steels and this was caused by higher thermal conductivity and tensile strength of HSLA cast steels. In case of HSLA cast steels, the thermal fatigue life was increased as the Ti contents were increased. On the contrary, The fatigue resistance was decreased as the C contents were increased. HSLA cast steels with combined addition of Nb, V and Ti had more excellent thermal fatigue life than those of individual addition of them. Therefore the optimum composition of HSLA cast steels for thermal fatigue resistance was 0.1%C-0.65%Mn-0.05%Nb-0.05%V-0.05Ti having the highest tensile stress.
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