http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Fe-20Mn-12Cr-3Ni-3Si 합금의 인장성질에 미치는 가공열처리의 영향
한현성 ( H. S. Han ),강창룡 ( C. Y. Kang ) 한국열처리공학회 2019 熱處理工學會誌 Vol.32 No.2
This study was carried out to investigate the effect of thermo-mechanical treatment on the tensile properties of Fe-20Mn-12Cr-3Ni-3Si alloy with deformation induced martensite transformation. α' and ε-martensite, dislocation, stacking fault were formed, and grain size was refined by thermo-mechanical treatment. With the increasing cycle number of thermo-mechanical treatment, volume fraction of ε and α'-martensite, dislocation, stacking fault were increased, and grain size decreased. In 5-cycle number thermo-mechanical treated specimens, more than 10% of the volume fraction of ε-martensite and less than 3% of the volume fraction of α'-martensite were attained. Tensile strength was increased and elongation was decreased with the increasing cycle number of thermo-mechanical treatment. Tensile properties of thermo-mechanical treated alloy with deformation induced martensite transformation was affected to formation of martensite by thermo-mechanical treatment, but was large affected to increasing of dislocation and grain refining. (Received January 17, 2019; Revised February 15, 2019; Accepted February 22, 2019)
25Cr-7Ni-4Mo 수퍼 2상 스테인리스강의 충격인성에 미치는 χ상의 영향
김창룡 ( C Y Kang ),한현성 ( H S Han ),이상희 ( S H Lee ),한태수 ( T S Han ) 한국열처리공학회 2012 熱處理工學會誌 Vol.25 No.2
This study has been carried out to investigate the precipitation behavior of x phase and effect of x-phase precipitation on the impact toughness of 25%Cr-7%Ni-4%Mo super duplex stainless steel. It was proved that the x phase was a inter metallic compound, which represented the higher chromium and molybdenum concentration than the matrix phases, and also showed the higher molybdenum concentration than the σ phase, The x phase was precipitated at the interface between ferrite and austenite or inside the ferrite matrix in the early stage of aging, The number of x phase precipitates increased with increasing aging time, however, after showing the maximum value, the number was decreased due to the gradual transformation of x phase into σ-phase. Aging ferrite phase was decomposed by the y2 phase and σ-phase. Impact toughness rapidly decreased with time in the initial stage of aging at x phase start to precipitate. Thus, the impact toughness was greatly influence for the precipitation of x phase.