| 超细晶硬质合金显微组织参数与力学性能定量关系的研究 |
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| 引用本文： | 赵世贤,宋晓艳,刘雪梅,魏崇斌,王海滨,高杨.超细晶硬质合金显微组织参数与力学性能定量关系的研究[J].金属学报,2011(9). |
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| 作者姓名： | 赵世贤 宋晓艳 刘雪梅 魏崇斌 王海滨 高杨 |
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| 作者单位： | 北京工业大学材料科学与工程学院新型功能材料教育部重点实验室; |
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| 基金项目： | 国家重点基础研究发展计划前期研究专项项目2011CB612207; 北京市自然科学基金项目2112006; 中南大学粉末冶金国家重点实验室开放课题项目资助~~ |
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| 摘 要： | 对超细晶WC-Co硬质合金的复相显微组织进行了系统的定量化表征和分析,获得了WC晶粒尺寸d_(WC),Co相平均自由程L_(Co)和WC晶粒邻接度C_(WC-WC)等显微组织参数与力学性能的定量关系,模型预测结果与实验测定结果符合很好.结果表明,当C_(WC-WC)基本相同时,超细晶硬质合金的硬度分别与d_(WC)~(-1/2)和L_(Co)~(-1/2)成线性正比关系,断裂韧性K_(IC)分别与d_(WC)~(-1/2)和L_(Co)~(-1/2)成确定性函数关系.在Co含量一定、WC平均晶粒尺寸基本相同的情况下,随着C_(WC-WC)的增大,超细晶硬质合金的横向断裂强度降低,且当C_(WC-WC)>0.5时,硬质合金的强度随C_(WC-WC)增加显著下降.
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| 关 键 词： | 超细晶硬质合金 体视学表征 显微组织参数 力学性能 |
QUANTITATIVE RELATIONSHIPS BETWEEN MICROSTRUCTURE PARAMETERS AND MECHANICAL PROPERTIES OF ULTRAFINE CEMENTED CARBIDES |
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| ZHAO Shixian,SONG Xiaoyan,LIU Xuemei,WEI Chongbin,WANG Haibin,GAO Yang Key Laboratory of Advanced Functional Materials,College of Materials Science , Engineering,Beijing University of Technology,Beijing.QUANTITATIVE RELATIONSHIPS BETWEEN MICROSTRUCTURE PARAMETERS AND MECHANICAL PROPERTIES OF ULTRAFINE CEMENTED CARBIDES[J].Acta Metallurgica Sinica,2011(9). |
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| Authors: | ZHAO Shixian SONG Xiaoyan LIU Xuemei WEI Chongbin WANG Haibin GAO Yang Key Laboratory of Advanced Functional Materials College of Materials Science Engineering Beijing University of Technology Beijing |
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| Affiliation: | ZHAO Shixian,SONG Xiaoyan,LIU Xuemei,WEI Chongbin,WANG Haibin,GAO Yang Key Laboratory of Advanced Functional Materials,College of Materials Science and Engineering,Beijing University of Technology,Beijing 100124 |
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| Abstract: | The microstructures of ultrafine WC-Co cemented carbides were characterized and analyzed by stereological methods.The quantitative relationships between the mechanical properties and microstructure parameters,such as the mean grain size d_(WC),mean free path L_(Co) and contiguity C_(WC-WC),were obtained.The calculated results of mechanical properties agree well with the experimental measurements.With the equivalent contiguity,the Vickers hardness of ultrafine cemented carbides has linear relationships with ... |
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| Keywords: | ultrafine cemented carbide stereological characterization microstructure parameter mechanical property |
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