合金元素对Fe基金刚石节块胎体组织及性能的影响?

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英文篇名：Effect of alloy elements on microstructures and properties of Fe-based matrixes for diamond segment 作者：高雅 ; 纠永涛 ; 于新泉 ; 于奇 英文作者：GAO Ya;JIU Yong-tao;YU Xin-quan;YU Qi;School of Mechanical Engineering, Henan University of Engineering;State Key Laboratory of Advanced Brazing Filler Metals and Technology, Zheng Zhou Research Institute of Mechanical Engineering Co., Ltd.; 关键词：Fe基胎体 ; 混料试验 ; 硬度 ; 抗弯强度 英文关键词：Fe-based matrixes;;mixture experiment;;hardness;;bending strength 中文刊名：FMYJ 英文刊名：Powder Metallurgy Technology 机构：河南工程学院机械工程学院;郑州机械研究所有限公司新型钎焊材料与技术国家重点实验室; 出版日期：2019-04-27 出版单位：粉末冶金技术 年：2019 期：v.37;No.184 基金：国家重点研发计划资助项目(2017YFB0305701);; 河南省创新型科技人才队伍建设工程(中原学者)资助项目(172101510003) 语种：中文; 页：FMYJ201902004 页数：8 CN：02 ISSN：11-1974/TF 分类号：25-32

摘要

选取Fe、Cu、Sn、Ni四种金属粉末作为烧结金刚石节块的胎体材料,设计混料试验预测成分变化对胎体性能的影响规律。结果表明:胎体中主要含α-Fe相、γ(Fe,Ni)相、Cu_(13.7)Sn固溶体和Cu_3Sn化合物。随Sn质量分数的升高,Cu_(13.7)Sn固溶体减少,脆性Cu3Sn相增多,当Sn质量分数增大到一定程度后,组织中Cu_(13.7)Sn固溶体全部转化成Cu_3Sn脆性相,因此,胎体硬度先增高后趋于稳定;Sn质量分数越高,胎体中脆性相越多,割裂基体,胎体抗弯强度下降。Ni易固溶于Cu、Fe中,产生固溶强化,Ni质量分数升高,胎体硬度和抗弯强度均有一定程度的提高;在Sn质量分数较低时,Cu质量分数越高,Cu_(13.7)Sn固溶体量越多,胎体硬度下降;在Sn质量分数较高时,Cu质量分数越高,组织中脆性Cu_3Sn相量越多,胎体硬度提高。Cu易与Ni、Fe形成置换式固溶体,产生固溶强化作用,Cu质量分数的升高对胎体抗弯强度有一定程度的提高。
        Fe-based matrixes for diamond segments were produced by Fe, Cu, Sn, and Ni powders. The mixture experiment was designed to predict the effect of element content on the matrixes performance. In the results, the matrix consists of α-Fe phase, γ(Fe, Ni)phase, Cu_(13.7) Sn solid solution, and the brittle phase of Cu_3Sn compounds. With the increase of Sn mass fraction, the content of Cu_(13.7) Sn solid solution by mass decreases, and the content of Cu3 Sn brittle phase by mass increases. When the Sn mass fraction increases to a certain extent, all the Cu_(13.7) Sn solid solution in microstructures is transformed into Cu_3Sn brittle phase, resulting that the matrix hardnes increases first and then tends to be stable. The higher the Sn mass fraction is, the more brittle phases in the matrix are,which will separate the matrix and lower the bending strength. Ni has the effect of solution strengthening in Cu and Fe, therefore the hardness and bending strength of the matrix are improved with the increase of Ni content by mass. At the lower Sn content by mass,the content of Cu_(13.7) Sn solid solution by mass increases with the increase of Cu content, resulting in the lower hardness of the matrix.At the higher Sn content by mass, the content of Cu_3Sn brittle phase by mass increases with the increase of Cu content, resulting in the higher hardness. Cu has the effect of solution strengthening in Ni and Fe, thus improving the bending strength of the matrix.

引文

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