Paper Infomation
Study on High Temperature Wear-Resistant Properties of the as-cast CoCrW Alloys
Full Text(PDF, 1369KB)
Author: Feng Li, Jiajia Li, Zhenhua Dan
Abstract: The microstructure and the wear-resistant properties of the as-cast CoCrW alloys at different temperatures were investigated by combining XRD, SEM, EDS and high temperature friction and wear tests. The results showed that the microstructure of the as-cast CoCrW alloys was composed of M23C6, M6C and γ-Co phases. The block-shaped carbides with different sizes were distributed into γ-Co matrix. The friction coefficients and wear loss of the alloys gradually decreased with the increase in temperature and the wear resistance of the alloys was the best at 600℃. When temperature was above 800℃, the wear resistance of the alloy became worse due to oxidation. Further analysis indicated that the mechanism that controls the wear-resistant property of the CoCrW alloys at different temperatures was the interaction of abrasive wear, spalling and oxidation wear.
Keywords: CoCrW Alloys; Microstructure; High Temperature Wear-resistant Property
References:
[1] References
[1]Ahmed R, Villiers Lovelock H L, Davies S, et al. Influence of Re-HIPing on the structure–property relationships of cobalt-based alloys[J], Tribology International, 2013, 57: 8-21
[2]Kenta Yamanaka, Manami Mori, Akihiko Chiba. Effects of nitrogen on microstructural evolution of biomedical Co–Cr–W alloys during hot deformation and subsequent cooling[J], Materials and Design, 2014, 57: 421-425
[3]Otterloo J D,Hosson J D. Microstructural features and mechanical properties of a cobalt-based laser coating[J], Acta Materialia, 1997, 45(3): 1225-1236
[4]耿德军, 朱丽娟. 超音速喷涂工艺参数对GH907金属基CoCrW涂层质量的影响[J],沈阳农业大学学报, 2010, 29 (1): 76-79
[5]徐向阳,刘世参,张振学. 等离子喷涂CoCrW涂层微动磨损特性的研究[J], 材料工程[J], 2001, 1(3): 3-6
[6]侯清宇, 高甲生.Co-Cr-W系等离子弧堆焊合金层显微结构的研究, 稀有金属材料与工程[J], 2004, 33(11): 1199-1202
[7]张振宇, 路新春, 雒建斌. 超音速等离子喷涂法制备La2O3和Ce2O3掺杂COCrW涂层的摩擦力学性能[J], 科学通报, 2007, 52(12): 1467-1473
[8]钟敏霖, 刘文今.Stellite 6+WC激光熔覆层微观组织的演变[J], 金属学报, 2002, 38(5): 495-500
[9]Giacchi J V, Fornaro O, Palacio H. Microstructural evolution during solution treatment of Co–Cr–Mo–C biocompatible alloys[J], Materials characterization, 2012, 68: 49-57
[10]Rosalbino F, Scavino G. Corrosion behaviour assessment of cast and HIPed Stellite 6 alloy in a chloride-containing environment[J], Electrochim Acta, 2013, 111: 656-662
[11]Lemarie E, Calvar M L. Evidence of tribocorrosion wear in pressurized water reactors, Wear[J], 2001, 249: 338-344
[12]Shworth M A, Bryar J C, Jacobs M H, et al. Microstructure and property relationships in hipped Stellite powders[J], Powder Metallurgy, 1999, 42: 243-249
[13]Yang Zhongyuan(杨中元), Li Xuefeng(李学锋), Zhang Bin(张彬). Thermal Spray Technology(热喷涂技术)[J], 2012, 4(4): 31
[14]杨中元, 周建平. 超音速火焰喷涂CoCrW涂层的性能研究, 中国表面工程[J], 2006, 19(2): 36-38
[15]张淑婷, 马尧, 王辉. 超音速火焰喷涂CoCrW耐磨涂层的性能研究[J], 热喷涂技术, 2010, 2 (3): 49-53
[16]李嘉宁, 巩水利, 王娟. Cu对TA15-2钛合金表面Stellite 12基激光合金化涂层组织结构及耐磨性的影响[J], 金属学报, 2014, 5 (50): 547-554
[17]蔡振兵,朱民昊,刘军. 激光熔覆Ni60和Co-Cr-W合金层的高温磨损特性研究[J], 润滑与密封, 2006, 4: 26-28
[18]Zhang Zhenyu, Lu Xinchun, Han Baolei, et al. Rare earth effect on microstructure, mechanical and tribological properties of CoCrW coatings[J], Materials science and engineering A, 2007, 444: 92-98
[19]Silva W S, Souza R M, Mello J D B, et al. Room temperature mechanical properties and tribology of NICRALC and Stellite casting alloys[J],Wear, 2011,271: 1819-1827