| 热处理YT14硬质合金微观结构与性能的关系 |
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| 引用本文： | 吕满珊,刘武,张富贵,刘静波.热处理YT14硬质合金微观结构与性能的关系[J].中南大学学报(自然科学版),1993(2). |
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| 作者姓名： | 吕满珊 刘武 张富贵 刘静波 |
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| 作者单位： | 中南工业大学，中南工业大学，中南工业大学，株洲硬质合金厂 |
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| 基金项目： | 国家计委“八五”攻关项目 |
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| 摘 要： | 用XRD分析了YT14硬质合金在常规烧结态和不同淬火温度的热处理态下粘结相的相组成以及WC相和(Ti,W)C固溶体相的微观应力,用EDX技术测定了Co粘结相成份,用TEM大量观察了合金的显微结构。结果表明,淬火处理使W、Ti原于在粘结相中的平均浓度增加,从而改善了粘结相的相组成;部分结晶较完整又有较大尺寸的WC晶粒边缘出现滑移台阶,降低了WC晶粒间的邻接度,减少了粘结相的平均自由程;回火处理降低了WC相和(Ti,W)C相的微观应力,使合金的性能进一步提高。
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| 关 键 词： | 硬质合金 热处理 透射电子显微镜 X射线衍射 粘结相 滑移台阶 |
THE RELATION BETWEEN MICROSTRUCTURE AND MECHANICAL PROPERTIES OF HEAT-TREATED YT14 CEMENTED CARBIDES |
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| Lu Manshan,Liu Wu,Zhang Fugui Central South University of Technology
Liu Jingbo Zhuzhou Cemented Carbide Factory.THE RELATION BETWEEN MICROSTRUCTURE AND MECHANICAL PROPERTIES OF HEAT-TREATED YT14 CEMENTED CARBIDES[J].Journal of Central South University:Science and Technology,1993(2). |
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| Authors: | Lu Manshan Liu Wu Zhang Fugui Central South University of Technology
Liu Jingbo Zhuzhou Cemented Carbide Factory |
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| Institution: | Lu Manshan;Liu Wu;Zhang Fugui Central South University of Technology
Liu Jingbo Zhuzhou Cemented Carbide Factory |
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| Abstract: | An analysis has been made of the binder phase component and the micro-stress in WC
and(Ti,W)C phases of YT14 cemented carbides on conventional sintering and heat-treat-
ment in different quench temperatures by X-ray difffaction.The binder phase composition of
the specimens has been determined by EDX.Many observations of microstucture of speci-
mens were carried out with TEM.It is showed that the concentrations of W and Ti atoms in
binder phase were increased,and the binder phase component was improved by quenching.
There were slip steps on WC grains boundary of crystallized perfection and the larger size af-
ter heat-treatment,which reduced the contiguity of WC grains and the mean free-path in
binder phase.Total micro-stress in WC and(Ti,W)C phase was decreased by temper,
which ensured better properties of the YT14 alloy. |
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| Keywords: | cemented carbides heat-treatment TEM X-ray diffraction binder phase slip step |
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