페라이트 상을 갖는 12Cr 내열강의 기계적성질 및 감쇠능에 미치는 시효처리의 영향 = Research Effect of Aging Treatment on the Mechanical Properties and Damping Capacity of 12Cr Heat Resistant Steel with Ferrite phase

다국어 초록 (Multilingual Abstract)

This study was carried out to investigate the effect of aging treatment on the mechanical properties and damping capacity of 12Cr heat resistant steel with ferrite phase. While hardness values in ferrite phase was not changed, that in martensite phase was dramatically dropped in early stage of aging treatment and then gradually decreased with increase of aging time. As aging treatment was carried out, the precipitation was not detected in ferrite phase, while carbides were precipitated in martensite phase. With increasing the aging time, tensile strength eventually decreased while impact toughness increased rapidly in the early stage of aging and then gradually increased. Besides, it was confirmed that damping capacity was not changed in the early stage of aging and then gradually increased with increase of aging time. (Received October 20, 2010; Revised November 9, 2010; Accepted December 7, 2010)