스프링강에서 Si, Ni 및 V 첨가가 미세조직 및 기계적 성질에 미치는 영향 (1) : 래스 내부 미세조직과 강도 및 경도 The relationships between the microstructural evolution within martensite lath and mechanical properties such as hardness and yield strength = Effects of the Alloy Content of Si, Ni and V on Mechanical Properties in High Strength Spring Steels (1)

다국어 초록 (Multilingual 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.