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首页> 外文期刊>Materials Science and Engineering >Fabrication and performance of Al_2O_3/(W,Ti)C + Al_2O_3/TiC multilayered ceramic cutting tools
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Fabrication and performance of Al_2O_3/(W,Ti)C + Al_2O_3/TiC multilayered ceramic cutting tools

机译：Al_2O_3 /（W，Ti）C + Al_2O_3 / TiC多层陶瓷切削刀具的制备与性能

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摘要

Al_2O_3/(W,Ti)C + Al_2O_3/TiC multilayered ceramic cutting tools with different thickness ratios were produced by hot pressing. The residual stresses inside the layered materials during fabrication were calculated by means of the finite element method. The mechanical properties at the outer layer of the layered materials were measured. The cutting performance of the layered tools was investigated and compared with an unstressed reference tool. Results showed that multilayered structure in AWT + AT layered ceramic materials can induce excess residual stresses during fabrication. These residual stresses are compressive in the AWT outer layer and tensile in the AT internal layer. The fracture toughness at the outer layer of the layered ceramic materials is greatly improved compared with that of the stress-free one. These multilayered tools can minimize the flank wear and edge chipping compared with the stress-free tool. The mechanisms responsible were determined to be the formation of compressive residual stress on the outer layer of the layered tools, which led to an increase in resistance to fracture. Thickness ratios were found to have a profound effect on the residual stresses, the fracture toughness, and the cutting performance of the layered tools.
机译：通过热压生产了不同厚度比的Al_2O_3 /（W，Ti）C + Al_2O_3 / TiC多层陶瓷切削刀具。借助于有限元法计算了制造过程中层状材料内部的残余应力。测量了层状材料的外层的机械性能。研究了分层工具的切削性能，并与无应力参考工具进行了比较。结果表明，AWT + AT层状陶瓷材料中的多层结构可在制造过程中引起过多的残余应力。这些残余应力在AWT外层中是压缩性的，而在AT内层中是拉伸性的。与无应力陶瓷材料相比，层状陶瓷材料在外层的断裂韧性大大提高。与无应力工具相比，这些多层工具可以使侧面磨损和边缘碎裂最小化。确定的原因是在分层工具的外层上形成了残余压缩应力，从而导致了抗断裂性的提高。发现厚度比对分层工具的残余应力，断裂韧性和切削性能具有深远的影响。

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  • 来源
    《Materials Science and Engineering》 |2010年第5期|1039-1047|共9页
  • 作者

    Deng Jianxin; Duan Zhenxing; Yun Dongling; Zhang Hui; Ai Xing; Zhao Jun;

  • 作者单位

    School of Mechanical Engineering, Shandong University, Jinan 250061, Shandong Province, PR China;

    School of Mechanical Engineering, Shandong University, Jinan 250061, Shandong Province, PR China;

    School of Mechanical Engineering, Shandong University, Jinan 250061, Shandong Province, PR China;

    School of Mechanical Engineering, Shandong University, Jinan 250061, Shandong Province, PR China;

    School of Mechanical Engineering, Shandong University, Jinan 250061, Shandong Province, PR China;

    School of Mechanical Engineering, Shandong University, Jinan 250061, Shandong Province, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    ceramic tools; layered materials; residual stress; Al_2O_3;

    机译：陶瓷工具;分层材料;残余应力Al_2O_3;

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