中文摘要：

采用微机控温的箱式电阻炉,对TCS不锈钢进行了热处理实验,并对其力学性能和组织进行了观察和测试。结果表明：热处理温度低于900℃时,加热温度和保温时间对其性能影响不大。热处理温度高于900℃时,随着加热温度的升高,抗拉强度和硬度先是急剧增大,然后有降低的趋势,最大值分别为：870MPa和266HB,转折温度点在1200℃左右;而冲击功和伸长率则随着加热温度的延长而降低。当温度高于900℃时,TCS不锈钢发生铁素体—奥氏体转变,奥氏体在淬火过程中析出马氏体;随着温度的升高,高于1200℃时,淬火组织中含有大量的高温铁素体。

英文摘要：

The effect of heat-treatment on mechanical properties and microstructure of TCS stainless steel by box-type resistance furnace was investigated. It is found that the heating temperature and the holding time have little effect on mechanical properties of steel when the heating temperature is below 900℃ . While the heating temperature is above 900℃, the tensile strength and hardness are first quickly increased and then slightly decreased with increasing the heating temperature. The maximum values of tensile strength and hardness are respectively 870MPa and 266HB at about 1200℃. Moreover, the ballistic work and elongation are decreased with increasing the heating temperature. With respect to the microstrueture transformation, it is found that the partial ferrite transforms to austenite when the heating temperature is above 900℃. And the martensite precipitates from the austenite during quenching process. While the heating temperature is above 1200℃, a great deal of high temperature δ-ferritic phase forms.