本文报道了一种制备梯度超粗晶硬质合金的新方法:结合初始WC-Co硬质合金棒料的成分设计和区域熔炼处理工艺,制备了显微组织和性能连续梯度分布的硬质合金棒料.对制备的梯度硬质合金棒料分别表征分析显微组织结构、晶粒尺寸、Co含量变化和硬度分布等,结果表明:沿着硬质合金棒料的轴线方向,WC晶粒尺寸范围为14.95～25.09 μm,Co的质量分数变化为3.0％～12.5％,硬度变化范围为8 100～9 800 N/mm2.本文提出的新方法实现了梯度结构和超粗晶组织的有效结合,可赋予硬质合金棒料不同部位以不同特征的力学性能.
参考文献
| [1] | Xiaoyan Song;Yang Gao;Xuemei Liu.Effect of interfacial characteristics on toughness of nanocrystalline cemented carbides[J].Acta materialia,20136(6):2154-2162. |
| [2] | Liu, Xingwei;Song, Xiaoyan;Wang, Haibin;Liu, Xuemei;Wang, Xilong;Guo, Guangsheng.Preparation and mechanisms of cemented carbides with ultrahigh fracture strength[J].Journal of Applied Crystallography,20154(4):1254-1263. |
| [3] | Xuemei Liu;Xiaoyan Song;Chongbin Wei.Quantitative characterization of the microstructure and properties of nanocrystalline WC-Co bulk[J].Scripta materialia,201210(10):825-828. |
| [4] | Z. Zak Fang;Xu Wang;Taegong Ryu.Synthesis, sintering, and mechanical properties of nanocrystalline cemented tungsten carbide--A review[J].International Journal of Refractory Metals & Hard Materials,20092(2):288-299. |
| [5] | I. Konyashin;B. Ries;F. Lachmann.Near-nano WC-Co hardmetals: Will they substitute conventional coarse-grained mining grades?[J].International Journal of Refractory Metals & Hard Materials,20104(4):489-497. |
| [6] | Peng Fan;Z. Zak Fang;Jun Guo.A review of liquid phase migration and methods for fabrication of functionally graded cemented tungsten carbide[J].International Journal of Refractory Metals & Hard Materials,2013Jan.(Jan.):2-9. |
| [7] | Liu, Yong;Du, Meng;Zhang, Mingyang;Wei, Qiuping;Yu, Zhiming;Li, Xiaofeng.Growth of diamond coatings on functionally graded cemented carbides[J].International Journal of Refractory Metals & Hard Materials,2015:307-313. |
| [8] | Jose Garcia;Reinhard Pitonak.The role of cemented carbide functionally graded outer-layers on the wear performance of coated cutting tools[J].International Journal of Refractory Metals & Hard Materials,2013Jan.(Jan.):52-59. |
| [9] | 付龙;柳学全;李一;丁存光;李立鑫;姜丽娟.国内外矿用高耐磨、高韧性硬质合金新技术[J].硬质合金,2012(4):254-261. |
| [10] | 陈伟民;王威威;周鹏;彭英彪;张伟彬;王爱军;陈利;杜勇.梯度硬质合金及耐磨涂层的计算模拟和实验验证[J].硬质合金,2012(5):268-278,288. |
| [11] | 史留勇;张守全;黄继华.WC-Co功能梯度硬质合金研究进展[J].粉末冶金技术,2010(4):305-312. |
| [12] | 孙卫权;原一高;王焱坤;白佳声;车俊华.气氛烧结法制备WC-Co梯度硬质合金的研究进展[J].硬质合金,2014(6):378-384. |
| [13] | 肖逸锋;贺跃辉;丰平;谢宏;马自省;张丽娟;黄自谦;黄伯云.渗碳工艺对WC-Co梯度硬质合金的梯度结构和硬度的影响[J].中国有色金属学报,2008(3):465-470. |
| [14] | I. Konyashin;B. Ries;S. Hlawatschek.Engineered surfaces on cemented carbides obtained by tailored sintering techniques[J].Surface & Coatings Technology,2014:300-309. |
| [15] | Xiao, Yaohong;Feng, Keqin;Chen, Hongsheng;Zhou, Yu;Li, Ying;Shi, Huan.Fabrication and micro-structure of a multilayer functionally graded (WC-Co)-Ni composite[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2015:77-81. |
| [16] | Norgren, S.;Garcia, J.;Blomqvist, A.;Yin, L..Trends in the P/M hard metal industry[J].International Journal of Refractory Metals & Hard Materials,2015:31-45. |
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