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中南大学学报(英文版)

Journal of Central South University

Vol. 26    No. 10    October 2019

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Tribological properties of Fe(Cr)-B alloys at high temperature
CUI Gong-jun(崔功军), YANG Zhen-wei(杨振伟), WANG Wen-jie(王文杰), GAO Gui-jun(高贵军)

College of Mechanical Engineering, Taiyuan University of Technology, Taiyuan 030024, China

Abstract:This work is aimed to study the effect of boron on wear resistance of Fe-Cr-B alloys containing different boron contents (0 wt%, 5 wt%, 7 wt% and 9 wt%) from room temperature (RT) to 800 °C in order to explore their applications as high-temperature wear resistant mechanical parts. Additionally, the wear mechanism of alloys is evaluated. The tribological properties of alloys are systematically studied by using a ball-on-disc tribometer at 10 N and 0.20 m/s from RT to 800 °C sliding against Si3N4 ceramic ball. The boron element greatly improves the wear resistance of specimens as compared with that of unreinforced specimen. The friction coefficients of specimens decrease with increasing of testing temperature. The wear rates of Fe-Cr-B alloys decrease firstly and then raise with the increase of boron content. The specific wear rates of specimens with boron are 1/10 of the unreinforced specimen. Fe-21wt%Cr-7wt% B keeps the best tribological properties at high temperature.

 

Key words: Fe(Cr)-B alloy; composite; high-temperature tribological property; friction; wear resistance

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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