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材料工程  2018, Vol. 46 Issue (2): 50-56    DOI: 10.11868/j.issn.1001-4381.2016.001286
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
梯度结构Al2O3-(W,Ti) C-TiN-Mo-Ni纳米金属陶瓷刀具材料的设计及制备
倪秀英1,2, 赵军1, 孙加林1, 李洪江3, 侯冠明1, 田源4
1. 山东大学 机械工程学院, 济南 250061;
2. 鲁东大学 交通学院, 山东 烟台 264025;
3. 雷沃国际重工股份有限公司, 山东 潍坊 261206;
4. 齐鲁工业大学 机械与汽车工程学院, 济南 250061
Design and Fabrication of Al2O3-(W, Ti)C-TiN-Mo-Ni Nano-composite Cermet Tool Materials with Graded Structures
NI Xiu-ying1,2, ZHAO Jun1, SUN Jia-lin1, LI Hong-jiang3, HOU Guan-ming1, TIAN Yuan4
1. School of Mechanical Engineering, Shandong University, Jinan 250061, China;
2. School of Transportation, Ludong University, Yantai 264025, Shandong, China;
3. Lovol Heavy Industry Co., Ltd., Weifang 261206, Shandong, China;
4. School of Mechanical & Automotive Engineering, Qilu University of Technology, Jinan 250061, China
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摘要 基于对高速硬切削时刀具应力和温度分布,以及刀具内部疲劳裂纹扩展仿真分析,提出一个组分含量分布和微观结构具有梯度特征的设计模型。通过韧性相的添加和梯度结构的引入,实现疲劳裂纹扩展速率的减缓,从而提高刀具寿命。采用二阶段热压烧结工艺制备出具有梯度结构的Al2O3-(W,Ti)C-TiN-Mo-Ni纳米复合刀具材料,并对其微观结构和力学性能进行研究。结果表明:所制备的梯度结构金属陶瓷材料表层硬度、内层的断裂韧度和抗弯强度分别达到19.258GPa,10.015MPa·m1/2和1017.475MPa,满足高速硬切削刀具的性能要求。材料的断口出现韧窝和黏结相撕裂形成的断裂棱,有利于断裂韧度和抗弯强度的增强,从而提高刀具抗疲劳裂纹扩展能力。
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倪秀英
赵军
孙加林
李洪江
侯冠明
田源
关键词 梯度结构金属陶瓷疲劳裂纹结构设计热压烧结    
Abstract:Based on the analysis on temperature and stress distributions, as well as fatigue crack propagation in cutting tools, a model for designing compositional distribution and microstructure with graded characteristics was proposed. The addition of ductile phase and the introduction of the graded structure are beneficial to slow down the fatigue crack propagation rate and improve tool life.Al2O3-(W,Ti)C-TiN-Mo-Ni nano-composite tool material with graded structures was fabricated via two stage hot pressing sintering process, and the microstructure and mechanical properties were studied. The results show that the surface hardness, fracture toughness of inner layer and bending strength of the cermet with sintered gradient structure reach 19.258GPa, 10.015MPa·m1/2 and 1017.475MPa,respectively.The performance requirements to cutting tools were met. The dimple cleavage and torn edge of the binding phase in the fracture surfaces can be beneficial to the improvement of the fracture toughness and bending strength,so the resistance to fatigue crack propagation of tools is improved.
Key wordsgraded structure    cermet    fatigue crack    structure design    hot-pressing sintering
收稿日期: 2016-10-24      出版日期: 2018-02-01
中图分类号:  TQ174  
通讯作者: 赵军(1967-),男,教授,博士,研究方向:高效切削刀具,联系地址:山东省济南市经十路17923号山东大学机械工程学院(250061),zhaojun@sdu.edu.cn     E-mail: zhaojun@sdu.edu.cn
引用本文:   
倪秀英, 赵军, 孙加林, 李洪江, 侯冠明, 田源. 梯度结构Al2O3-(W,Ti) C-TiN-Mo-Ni纳米金属陶瓷刀具材料的设计及制备[J]. 材料工程, 2018, 46(2): 50-56.
NI Xiu-ying, ZHAO Jun, SUN Jia-lin, LI Hong-jiang, HOU Guan-ming, TIAN Yuan. Design and Fabrication of Al2O3-(W, Ti)C-TiN-Mo-Ni Nano-composite Cermet Tool Materials with Graded Structures. Journal of Materials Engineering, 2018, 46(2): 50-56.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.001286      或      http://jme.biam.ac.cn/CN/Y2018/V46/I2/50
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