Fe-Ni合金中奥氏体的有序化对马氏体相变的影响

金属学报

1986, Vol. 22

Issue (5): 29-36

论文

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Fe-Ni合金中奥氏体的有序化对马氏体相变的影响

颜林发;徐祖耀

上海钢铁研究所;上海交通大学

EFFECT OF AUSTENITE ORDERING ON MARTENSITIC TRANSFORMATION IN Fe-Ni ALLOYS

YAN Linfa (Shanghai Iron and Steel Research Institute); XU Zuyao (Shanghai Jiaotong University)

引用本文:

颜林发;徐祖耀. Fe-Ni合金中奥氏体的有序化对马氏体相变的影响[J]. 金属学报, 1986, 22(5): 29-36.
, . EFFECT OF AUSTENITE ORDERING ON MARTENSITIC TRANSFORMATION IN Fe-Ni ALLOYS[J]. Acta Metall Sin, 1986, 22(5): 29-36.

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摘要: 等晶粒度的Fe-Ni合金多晶试样,其M_s值随淬火温度T_Q分二个阶段下降,在T_Q≈800℃时,M_s出现极小值;在T_Q<700℃时,M_s进一步下降.低温淬火后马氏体的爆发量较高温淬火的为小,这些现象是奥氏体有序化的必然结果。透射电镜观察到奥氏体中存在高密度的微小沉淀相和超点阵位错,证实在大块Fe-Ni合金中可以发生有序转变。

Abstract：Experimental results show that, in Fe-Ni alloys, the M_s or M_b values decrease in two steps with the decrease in quenching temperature below 950℃ with definite grain size of the parent phase. In the first step, i. e., quenching temperature around 800℃, a minimum M_s value appears, and in the second one, i.e., below 700℃ quenching, M_s decreases continueously. The burst aize of martensite transformation corresponding to the lower quenching temperatures is rather smaller than that to the higher ones. These phenomena prove to be related to the ordering of the parent phase. The observation of densely dispersed tine precipitates and superlattice dislocations by TEM comfirms the views that ordering does exist in bulk specimens and markedly affect the martensitic transformation of Fe-Ni alloys.

收稿日期: 1986-05-18

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