Abstract：The WC solid solution alloy coating was prepared under the condition of vacuum hot- melt WC solid solution. The alloy coating preparation process, micro- structure, phase structure and the characteristics of the distribution of alloy elements and micro- hardness were researched. Results showed that the organic forming agents were rolled into a fibrous form and a crisscross pattern with three- dimensional reticular structure in the process of rolling, which combined the dispersed powder particles together to form a flexible and bendable powder blanks. More important, the thickness of the coating can be adjusted by roll spacing. In the vacuum sintering stage, WC solid solution and 45 steel substrate combined with high strength in metallurgical combination. Coating surface hardness increased with the content of WC solid solution, but the shear bond strength of the coating increased and then decreased slightly. When the content of WC solid solution was 85% in coating, surface hardness was 1132HV (HV30), shear bond strength reached to 407 MPa.
[1] BMFT . Damit Rost und Verschlei? nicht Milliarden fressen[R].Bundesministerium für Forschung and Technologied, Bonn,Germany.1983.[2]H.paydas,A.mertens,R.carrus, et al. Laser cladding as repair technology for Ti–6Al–4V alloy: Influence of building strategy on microstructure and hardness[J].Materials & Design, 2015,85（11）：497–510 .[3] John wiley, suns Ltd. The Science and Engineering of Thermal Spray Coatings[M], Wiley, Chichester, New York, Brisbane, Toronto,Singapore, 1995：414. [4] D. Matejka, B. Benko. Plasma Spraying of Metallic and Ceramic Materials[M], Wiley, Chichester, New York, Brisbane, Toronto,Singapore, 1989：280. [5]R.B. Heimann. Plasma-Spray Coating.Principles and Applications[M],VCH Weinheim, New York, Basel, Cambridge, Tokyo, 1996:339 .[6]Qingbao Wang, Zhuoxin Li,Yaowu Shi.et.al. Interior crack and its formation mechanism in overlaying weld of back-up rolls[J].Engineering Failure Analysis.2013,34(10): 268–277.[7]A. Webera,?R. Remfortb,?N. Woehrl. Chemical vapor deposition of Si/SiC nano-multilayer thin films[J].Thin Solid Films ,2015,593(10): 44–52.[8]晏建武,张晨曙.高含量碳化钨梯度耐磨涂层的渗透钎焊制备方法[p].中国专利,ZL CN102965663A,2013-03-13.YAN JIANWU;ZHANG CHENSHU.Penetration brazing preparation method of high-content wolfram carbide gradient wear-resisting coating[p].Chinese patent,CN102965663A,2013-03-13[9]张大全,周腾,高立新.一种碳化钨防腐耐磨复合涂层的制备方法[p].中国专利,ZL CN104178762A,2014-12-03.ZHANG DAQUAN,ZHOU TENG,GAO LIXIN.Preparation method of tungsten carbide anti-corrosion wear-resistant composite coating[p]Chinese patent, CN104178762A,2014-12-03.[10] Era H, Otsubo F, Uchida T, Fukuda S, Kishitake K. A mod- ified shear test for adhesion evaluation of thermal sprayed coating[J]. Materials Science and Engineering A, 1998, 251(1-2): 166-172.[11] Guo S Q, Mumm D R, Karlsson A M, Kagawa Y. Measure- ment of interfacial shear mechanical properties in thermal barrier coating systems by a barb pullout method[J]. Scripts Materialia, 2005, 53(9): 1043-1048.[12] Heinrich G, Horst W. A novel shear test for plasma-sprayed coatings[J]. Surface and Coatings Technology, 1991, 45(1-3):317-323.[13] Cho B H. Modeling and analysis of spacecraft power system[D]Virginia Polytech Instit State Univ B lacksburg.1985.[14]宣天鹏,阂丹,霍影. 含稀土真空熔结镍基合金涂层的界面组织和分布特性[J],焊接学报，2005,26(70):19-26. XUAN Tian-peng, MIN Dan,HUO Ying. Interface structure and distribution characteristics of vacuum fusion sintered Ni-based alloy containing rare earth element[J]Transactions of the china welding Institution.2005,26(70):19-26.[15] Lin guang hua. Solid Material Science of Rare Earth [M]. Beijing: Mechanism Industry Press,1997: 7195.[16]宣天鹏,阂丹.忆对真空熔结NiCrBSi涂层合金元素和硬度分布的影响[J]，稀有金属材料与工程2004, 33(1):102-105.XUAN Tian-peng, HUO Ying, MIN Dan. Effect of Rare Earth on Component and Micro-hardness Distribution of Vacuum Fusion Sintered Ni-Based Metal-Ceramic Composite Coating[J].Transactions of Materials and Heat Treatment.2004, 33(1):102-105.[17] K. Niihara, R. Morena, D.P.H. Hasselman. Evaluation of KIC of brittle solids by the indentation method with low crack-to-indent ratios[J]. journal of materials science letters .1981,1(1)：13-16.[18]Fan Zhang, Liang-feng Lice, En-ze Wang.Effect of micro-alumina content on mechanical properties of A1203/3Y-TZP composites [J].Ceramics International .2015,41:12417-12425.
2018, Vol. 25 
