STS 420 스테인레스 강의 기계적 성질 및 피로균열전파에 미치는 템퍼링 온도의 영향

The effect of tempering temperature on the mechanical properties and fatigue crack propagation in STS 420 stainless steel

An experimental investigation has been carried out to determine the effect of tempering temperature on the fatigue crack propagation behavior and mechanical properties using the quenched and tempered STS420 martensitic stainless steel. Heat treatments of tempering for two hours at the five different temperatures of 150.deg.C, 300.deg.C, 450.deg.C, 600.deg.C and 700.deg.C have been performed on the martensite obtained by air cooling the specimens austenitized for one hour at 1010.deg.C. Tensile strength, yield strength, hardness, .DELTA.K$_{th}$, C and m values of differently tempered specimens have been investigated by tensile, hardness and fatigue tests.s.