발간논문

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Vol.35, No.8, 972 ~ 977, 1997
Title
Effects of the W addition on the Microstructure Evolution and Mechanical Properties of High Strength Si-Cr Spring Steels
반덕영 , 남원종 , 이상래 Deok Young Ban , Won Jong Nam , Sang Lae Lee
Abstract
Effects of the W addition on the microstructure evolution and mechanical properties of high strength Si-Cr spring steels have been investigated. The W addition would reduce the coarsening rate of cementite due to the lower diffusion rate, resulting in a smaller size of cementite particles. The sag resistance depends on the distribution and the size of precipitates. Therefore, an abundance of precipitates at 350℃ tempering exhibits the maximum hysteresis loop area, i.e. the sag resistance. At the tempering temperature of 450℃-500℃, the W addition resulted in the improvement of the sag resistance through the suppression of the cementite coarsening.
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