발간논문

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Vol.23, No.7, 671 ~ 678, 1985
Title
Effects of Substituting Ti for V on Mechanical Properties of Weathering HSLA Steel
홍주화Joo Wha Hong, 한종만Jong Man Han, 강기봉Kee Bong Kang, 김영길Young Gil Kim
Abstract
The effects of substituting Ti for V on mechanical properties in weathering type high-strength low-alloy steel were investigated. Two different final rolling temperatures were employed in the controlled rolling. Air cooling, accelerated cooling by water spraying, and normalizing were applied as post rolling treatments. Accelerated cooling greatly enhanced the strength and better toughness in the Ti-bearing steel. Ti-steel exhibited better isotropic impact behavior compared with V-steel due to spheroidization of non-metallic inclusions by Ti. Normalizing reduced the strength of Ti-steel. The high cycle fatigue strength of air cooled Ti-steel was 18% higher than that of air cooled V-steel owing to the higher tensile strength of Ti-steel. Accelerated cooling also increased the fatigue strength.
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