발간논문

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Vol.36, No.2, 179 ~ 185, 1998
Title
Effects of the Alloy Content of Si , Ni and V on Mechanical Properties in High Strength Spring Steels (1) ( The relationships between the microstructural evolution within martensite lath and mechanical properties such as hardness and yield strength )
남원종 , 최해창 Won Jong Nam , Hae Chang Choi
Abstract
The effects of the alloy content of Si, Ni and V and tempering temperatures on mechanical properties, especially hardness and yield strength, of 0.6C-(1.0-2.5)Si-(0.7-1.8)Ni-(0.1-0.2)V steels were investigated by hardness tests, tensile tests and transmission electron microscopy. The results showed that tempering temperatures for the maximum yield strength and the softening resistance in hardness moved to higher temperatures due to the retardation of the conversion of ε-carbide to cementite within martensite laths by Si addition. Additionally, it was found that the temperatures of the conversion of ε-carbide to cementite was not changed by the addition of Ni or V addition in present steels. The contribution of Ni or V addition was limited only to the increase in hardness and yield strength.
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