Erosive wear behavior of high chromium cast irons with different erodent particles
This study investigates the effects of properties of the erodent particles on solid particle erosive wear of high chromium cast irons containing 12wt.％Cr and 27wt.％Cr. The solid particle erosion tests were conducted using three different erodent particles of 810 urn and 800 HV cylindrical shaped round cut wire, 770 urn and 810 HV irregularly shaped steel grits and 750 urn and 705 HV spherical steel shots, with impact angles between 30 and 90 deg. and a particle velocity of 100 m/s. The experiments reveal that in the case of spherical shaped erodent, the erosion rate reaches the maximum value at middle angles of 60 deg., and with 27％Cr cast iron the erosion rate is decreased. Interestingly there is little impact angle dependency for 27％Cr cast iron. There are similar impact angle dependency but higher erosion values in the case of cylindrical and irregularly shaped erodent particles. Hardness measurement and the observation of the eroded surface by scanning electron microscopy are to analyze the erosion behavior. EPMA and XRD analysis were used to determine the carbide volume fraction and retained austenite in the matrix. The erosion rates of high chromium cast irons are closely related to not only the relative hardness of erodent and matrix hardening but also the volume fraction of chromium carbides in the matrix.
erosion high chromium cast iron impact angle dependency work hardening carbide volume fraction
Takafumi Funabiki Kazumichi Shimizu Xinba Yaer Hiroya Hara Kenta Kusumoto Masahito Tanaka
Muroran Institute of Technology, 27-1, Mizumoto-cho, Muroran, Hokkaido 050-8585, Japan Sankyo Alloy Casting Co., Ltd. Tsukuda 5-10-7, Nishiyodogawa-ku, Osaka 555-0001, Japan
国际会议
The 11th Asian Foundry Congress(第11届亚洲铸造会议 AFC-11)
广州
英文
1-5
2011-11-12（万方平台首次上网日期，不代表论文的发表时间）