Preparation and sintering of WC-Co composite powders for coarse grained WC-8Co hardmetals

被引:56
|
作者
Su, Wei [1 ]
Sun, Yexi [1 ]
Wang, Huifeng [1 ]
Zhang, Xianqi [1 ]
Ruan, Jianming [1 ]
机构
[1] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China
来源
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2014年 / 45卷
关键词
WC-Co composite powder; Hydrogen reduction; Coarse grained hardmetals; Faceted multisteps; CEMENTED CARBIDES; GROWTH; BINDER; TEMPERATURE; HARDNESS; COBALT; VC;
D O I
10.1016/j.ijrmhm.2014.04.004
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Due to high chemical and geometrical irregularities of WC grain and high uncertainty of WC grain growth, it is hard to prepare coarse grained WC-Co hardmetals with high performance through sintering of WC-Co ball milling powder. A new method for preparing of WC-8Co composite powder is put forward, which merges the preparation of Co powder with the mixing of WC-Co. The compositions, phases, and shapes of WC-8Co composite powder were investigated by chemical element analysis, X-ray diffractometry (XRD), and scanning electron microscopy (SEM), respectively. The phase and shape of raw WC powder do not change during the preparation of WC-8Co composite powder. Microstructures and mechanical properties of WC-8Co hardmetals prepared by sintering of the composite powders were compared with those of WC-8Co hardmetals prepared by sintering of the ball milling powders. The results show that the new coarse grained WC-8Co hardmetals have a better performance than conventional WC-8Co hardmetals for their better uniformity of WC grains. The comparison of microstructures and mechanic properties of sintered alloys also confirms that VC further inhibits the growth of WC grain and improves the performance of WC-8Co hardmetals. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:80 / 85
页数:6
相关论文
共 50 条
  • [41] Sintering and microstructure of nanophase WC/Co hardmetals
    Korea Inst of Machinery &, Materials
    J Mater Process Technol, 1-3 (317-321):
  • [42] On bending strength of superhard composite materials based on WC-Co hardmetals
    Golovchan, V. T.
    STRENGTH OF MATERIALS, 2009, 41 (06) : 603 - 612
  • [43] Fracture behaviour of WC-Co hardmetals with WC partially substituted by titanium carbide
    Szutkowska, M.
    Boniecki, M.
    Cygan, S.
    Kalinka, A.
    Grilli, M. L.
    Balos, S.
    E-MRS FALL SYMPOSIUM I: SOLUTIONS FOR CRITICAL RAW MATERIALS UNDER EXTREME CONDITIONS, 2018, 329
  • [44] ORIGIN OF WC SUBSTRUCTURE AND THE EFFECT OF PROCESSING ON THE MICROSTRUCTURE OF WC-Co HARDMETALS.
    Almond, Eric A.
    Roebuck, Bryan
    High Temperatures - High Pressures, 1982, 14 (02) : 143 - 154
  • [45] Sintering of WC-Co powder with nanocrystalline WC by spark plasma sintering
    Wang Xingqing
    Xie Yingang
    Guo Hailiang
    Van der Biest, O.
    Vleuge, J.
    RARE METALS, 2006, 25 (03) : 246 - 252
  • [46] Sintering of WC-Co powder with nanocrystalline WC by spark plasma sintering
    O. Van der Biest
    J. Vleugels
    Rare Metals, 2006, (03) : 246 - 252
  • [47] The stress-strain behavior of WC-Co hardmetals
    Golovchan, V. T.
    Litoshenko, N. V.
    COMPUTATIONAL MATERIALS SCIENCE, 2010, 49 (03) : 593 - 597
  • [48] Abrasion resistance of wide grained WC/Co hardmetals
    Roebuck, B
    Gee, MG
    EURO PM 2002: HARD MATERIALS PROCEEDINGS, 2002, : 129 - 135
  • [49] A dual composite of WC-Co
    Zhigang Fang
    Greg Lockwood
    Anthony Griffo
    Metallurgical and Materials Transactions A, 1999, 30 : 3231 - 3238
  • [50] Consolidation of advanced WC-Co powders
    Parasiris, A
    Hartwig, KT
    INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2000, 18 (01): : 23 - 31