高 Co-Ni 二次硬化马氏体钢 AF1410 的穆斯堡尔谱

Study of High CoNi SecondaryHardening Martensitic Steel AF1410 by Mssbauer Spectroscopy

用穆斯堡尔谱技术对ＡＦ１４１０钢在不同回火温度下超精细磁场的变化进行了研究．分析了合金元素的分布与超精细磁场的关系及对力学性能的影响．结果表明，高ＣｏＮｉ二次硬化马氏体钢ＡＦ１４１０的超精细磁场中出现一些高场成分，平均超精细场在４８０～５１０℃出现一峰值，此温度是屈服强度二次硬化峰的峰位．奥氏体量在４３０℃附近有一极小值，此回火温度下冲击韧性最差．

Variations of hyperfinefield with tempering temperature for high CoNi secondaryhardening martensitic steels AF1410 are studied by Mssbauer spectroscopy. The relationships between the hyperfinefield Hhf and distribution of alloy elements and the influence of these relations upon the mechanical properties are discussed. The result shows that some highfield components of hyperfinefield appear in AF1410. The average hyperfinefield has a peak between 480 and 510℃ with an increase in tempering temperature. This temperature is just the peak position of yield strength. The Austenite constituents have a lowest value at 430℃. And the impact toughness at this tempering temperature is lowest.