Preparation and Properties of High-Temperature Self-Lubricating Materials Based on H13 Steel

被引:3
作者
Jiang, Cheng [1 ]
Wang, Huajun [1 ]
Li, Menglu [1 ]
Yan, Songshan [2 ]
Yao, Zhenhua [1 ]
Liu, Qingyang [1 ]
机构
[1] Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan 430070, Hubei, Peoples R China
[2] Wuhan Univ Technol, Sch Mech Engn, Wuhan 430070, Hubei, Peoples R China
关键词
H13; steel; high-temperature wear; microstructure; powder metallurgy; self-lubrication composite; TRIBOLOGICAL PERFORMANCE; TOOL STEEL; GRAPHITE; BEHAVIOR; MICROSTRUCTURE; COMPOSITE;
D O I
10.1007/s11665-020-05284-w
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
High-temperature self-lubricating materials based on H13 steel are prepared by the powder metallurgy method. The sintering process, phase addition and high-temperature testing of the material are studied so that the mechanical and wear performance of the composites can be optimized. The results show that the optimum sintering process is 2 h at a temperature of 1250 degrees C. When the contents of Cr2C3 and CaF2 are 10%, the mechanical and sintering properties of the composites are acceptable. The relative density reaches 80.2% and the bending strength reaches 720.2 MPa. Moreover, CaF2 effectively reduces the friction coefficient and wear rate of the material. The friction coefficient decreases to a minimum of 0.24, but the wear rate increases to a maximum of 7.26 x 10(-5) mm(2)/min at a load of 1065 g. Cr2C3 helps to alleviate the oxidation of the composites, and the precipitation of CaF2 causes network cracks to reduce the thermal fatigue performance.
引用
收藏
页码:7830 / 7842
页数:13
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