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前苏联基辅工业大学和《电炉炼钢》工厂对含16％～21％Ni的钢进行了研究。这类钢与马氏体时效钢的差别是不含钻。在a→γ转变区时效后,形成复杂的马氏体-奥氏体组织,兼备高强度和塑性。表1列举了这类钢的钢号和化学成分。 H16T3钢在600℃以上的温度下,在时效的同时形成转变的奥氏体,生成具有高塑性的马氏体-奥氏体组织。但是,在此温度下软化过大(达30％)。因此,为了在达到具有高强度马氏体的同时形成必需转变的马氏体数量,需要适当降低a→γ转变区温度。这可以用两种方法来达到:在钢的成分内加镍和钼或采用特殊的热处理方法。 H21M2T2(?)钢在900℃水淬后可以进行机械加
The former Soviet Union Kyiv University of Technology and the “EAF” plant containing 16% ~ 21% Ni steel was studied. The difference between this type of steel and martensite-aged steel is that it does not contain a drill. After aging in a → γ transformation zone, the formation of complex martensite - austenite, both high strength and plasticity. Table 1 lists the steel grade and chemical composition of this type of steel. H16T3 steel at 600 ℃ above the temperature, aging at the same time the formation of the transformation of austenite, to produce a high plasticity martensite - austenite. However, softening is too large (up to 30%) at this temperature. Therefore, it is necessary to appropriately lower the temperature of the a → γ transition zone in order to achieve the necessary amount of martensite to be formed while having a high-strength martensite. This can be done in two ways: by adding nickel and molybdenum to the steel composition or by special heat treatment. H21M2T2 (?) Steel at 900 ℃ water quenching can be mechanical plus