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Volume 38 Issue 1
Jul.  2021
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LIU Qing-yang, WANG Hua-jun, ZHOU Chun-yang, YAO Zhen-hua, YAN Song-shan. Preparation and high temperature properties of new self-lubricating die materials[J]. Powder Metallurgy Technology, 2020, 38(1): 51-58. DOI: 10.19591/j.cnki.cn11-1974/tf.2020.01.008
Citation: LIU Qing-yang, WANG Hua-jun, ZHOU Chun-yang, YAO Zhen-hua, YAN Song-shan. Preparation and high temperature properties of new self-lubricating die materials[J]. Powder Metallurgy Technology, 2020, 38(1): 51-58. DOI: 10.19591/j.cnki.cn11-1974/tf.2020.01.008
shu

Preparation and high temperature properties of new self-lubricating die materials

  • 1.

    School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China

  • 2.

    School of Mechanical and Electrical Engineering, Wuhan University of Technology, Wuhan 430070, China

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  • Received Date: November 13, 2018
    Graphical Abstract
    • Abstract
  • A new high-temperature self-lubricating die materials was prepared by powder metallurgy using Fe-Ni alloy as the base materials, Cr2O3 as the hard phase, and CaF2 as the solid lubricant. The effects of sintering process on the mechanical properties of Fe-Ni-based self-lubricating materials were investigated by X-ray diffractometer, scanning electron microscope, and microhardness tester, the influences of Cr2O3 and CaF2 on the sintering properties of the self-lubricating materials were studied, and the optimum sintering process was obtained. The results show that, the self-lubricating materials sintered at 1320℃ for 2 h exhibit the excellent mechanical properties. When the content of Cr2O3 by mass increases from 0 to 30%, the relative density of the sample decreases by 4.0%, and the hardness increases from HV 227.3 to HV 342.8. When the content of CaF2 by mass increases from 0 to 10%, the relative density and hardness of the sample gradually decrease. With the increase of CaF2 content by mass in the friction and wear test at 600℃, the friction coefficient and wear rate decrease first and then increase. The self-lubricating die materials show the best combination performances as the Cr2O3 content of 20% and the CaF2 content of 8% by mass.
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    • References (17)
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