Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第27卷    第11期    总第224期    2017年11月

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文章编号:1004-0609(2017)-11-2267-09
Mo含量对镍基合金力学及摩擦学性能的影响
杨素兰1, 2,马 勤1,王文珍2,贾均红1, 2

(1. 兰州理工大学 材料科学与工程学院 省部共建有色金属先进加工与再利用国家重点实验室, 兰州 730050 2. 中国科学院 兰州化学物理研究所 固体润滑国家重点实验室,兰州 730000)

摘 要: 利用粉末冶金的方法制备不同Mo含量的镍基合金。考察其室温至1000 ℃的力学性能及室温至900 ℃下的摩擦磨损性能,分析磨损表面形貌,阐明Mo含量对Ni基合金力学和摩擦学性能的影响及其机理,优化Mo元素的含量。结果表明:Mo含量(质量分数)为5%时可以改善镍基合金的拉伸、压缩等力学性能和摩擦学性能;XRD、SEM及 Raman分析表明在500 ℃以上时,磨痕表面形成由NiO、NiMoO4等组成的摩擦层,有效地改善了Ni基合金在高温下的摩擦学性能。

 

关键字: 粉末冶金;镍基合金;钼;摩擦磨损

Effect of molybdenum content on mechanical and tribological properties of nickel- base alloy
YANG Su-lan1,2, MA Qin1, WANG Wen-zhen2, JIA Jun-hong2

1. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China; 2. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China

Abstract:Ni-based alloys with different Mo contents were prepared by the powder metallurgy. The mechanical properties from RT to 1000 ℃ and the tribological properties from RT to 900 ℃ were investigated, and the wear surfaces morphologies were analyzed. The effect of Mo content on the mechanical and tribological properties and the mechanism were elucidated. The results show that the mechanical properties and tribological properties of Ni-based alloy can be improved when the molybdenum content is 5%. The worn surfaces examined by XRD, SEM and Raman indicate that the tribo-layers consist of NiO and NiMoO4 at temperature above 500 ℃, which is responsible for the reduced friction coefficient and wear rate of Ni-based alloy at high temperatures.

 

Key words: powder metallurgy; Ni-based alloy; Mo; friction and wear

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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