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金属学报  2001 

高CoNi合金钢中二次碳化物的析出与转化

, PP. 381-385

Keywords: 高CoNi合金钢,二次硬化,合金碳化物

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Abstract:

高CoNi超高强度合金钢是典型的淬火回火马氏体钢,等温回火处理产生的针状合金碳化物沉淀即二次硬化反应使材料达到高的强韧性.针状合金碳化物M2C从马氏体基体α-Fe中以共格形态析出,该共格关系随过时效而失去.回火温度较高时M2C转化为稳定的合金碳化物M23C6和M7C3.利用微衍射技术唯一地确定了可能的合金碳化物沉淀相的晶体结构.

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