实验表明,降镍钴含锰铬12Ni马氏体时效钢有较高的强度和较好的韧性。观察了这类钢的时效沉淀相和位错组态;分析了位错的易交滑移特性;根据六角密排相沿位错线的层错区沉淀机制讨论了实验结果,还提出了用合金中原子的平均电子浓度作为预测马氏体时效钢高温奥氏体的稳定性和溶解度的判据。这些为马氏体时效钢降镍钴和合理的合金化提供有益的看法。
It is shown that Cr and Mn bearing 12Ni maraging steels with lower Niand Co contents are of high strength and toughness, Precipitates after aging,dislocation configurations and easy cross-slip behavior of dislocations have beenexamined. The results are discussed on the assumption that the hexagonal close-packed phases were precipitated along the stacking fault zone of the dislocationlines. In order to predict the stability and solubility of high-temperature austenitein maraging steels, a criterion has been suggested from the point of view ofaverage electron concentration per atom of the alloy. The criterion is helpful forrational alloying of maraging steels with lower Ni and Co contents.
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