| 高CoNi合金钢中二次碳化物的析出与转化 |
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| 引用本文： | 胡正飞,吴杏芳,梨秀球,王春旭. 高CoNi合金钢中二次碳化物的析出与转化[J]. 金属学报, 2001, 37(4): 381-385 |
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| 作者姓名： | 胡正飞 吴杏芳 梨秀球 王春旭 |
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| 作者单位： | 1. 北京科技大学材料物理系,北京,100083
2. 钢铁研究总院,北京 100081 |
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| 基金项目： | 国家九五科技攻关资助项目 97060900 |
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| 摘 要： | 高CNi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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| 关 键 词： | 合金钢 二次硬化 合金碳化物 回火 钴 镍 |
| 文章编号： | 0412-1961(2001)04-0381-05 |
| 修稿时间： | 2000-10-13 |
PRECIPITATION AND TRANSFORMATION OF THE SECOND CARBIDES IN ISOTHERMAL TEMPERED HIGH CoNi ALLOY STEEL |
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| HU Zhengfei,WU Xingfang,LI Xiuqiu. PRECIPITATION AND TRANSFORMATION OF THE SECOND CARBIDES IN ISOTHERMAL TEMPERED HIGH CoNi ALLOY STEEL[J]. Acta Metallurgica Sinica, 2001, 37(4): 381-385 |
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| Authors: | HU Zhengfei WU Xingfang LI Xiuqiu |
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| Affiliation: | HU Zhengfei,WU Xingfang,LI Xiuqiu Department of Materials Physics,University of Science and Technology Beijing,Beijing 100083 WANG Chunxu Central Iron and Steel Research Institute,Beijing 100081 Correspondent: HU Zhengfei,Tel: |
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| Abstract: | High Co-Ni alloy steel is a typical aging martensitic steel, and its superior performance can be achieved by precipitation of fine carbides during isothermal tempering. The needle-like carbides precipitated in the coherent way with martensite matrix, and this coherent relationship will be lost when overaged. With coursing of needle-like carbide M2C, it changed into cubic carbides of M23C6, and the precipitating granular shaped carbide M7C3 promoted M2C dissolution. The crystal structures of all the probable kinds of precipitating carbides were determined by micro-diffraction. |
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| Keywords: | high CoNi alloy steel secondary hardening carbide tempering |
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