Effect of Cr3C2 Content on the Microstructure and Wear Resistance of Fe3Al/Cr3C2 Composites
Journal article, 2022

In this paper, an engine piston ring coating comprising composite material of Fe3Al and Cr3C2 mixed powder was prepared by laser cladding onto carbon structural steel. The microstructure and tribological properties of the cladding materials were investigated through X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), and wear tests. The influence mechanism of the Cr3C2 content in cladding powder was studied. During the process of wear, the soft Fe3Al/Fe2AlCr matrix is first ground off, and the hard Cr7C3 phase initially supports the abrasive surface before being worn away into hard particles, resulting in abrasive wear. With the increase in Cr3C2 content, the hardness of the cladding layer increases, the proportion of the Cr7C3 phase increases, and the morphology changes from a sparse network to a dense floccule. Of the cladding layers with different Cr3C2 content, the 15 wt.% Cr3C2 cladding layer had the lowest friction coefficient, and the 25 wt.% Cr3C2 cladding layer had the lowest wear rate. The low wear rate of the 25 wt.% Cr3C2 cladding layer can be attributed to the fact that adhesive wear does not easily occur and the fine microstructure of the strengthening phase, which facilitates better separation in the grinding surfaces.

wear resistance

laser cladding

carbide behavior

Fe Al/Cr C composites 3 3 2

Author

Yingkai Feng

Tsinghua University

Ltd.

Jiguo Shan

Ltd.

L. Zhao

China Iron and Steel Research Institute Group

Zhenbo Liu

China Iron and Steel Research Institute Group

Karin Anne Xia Gong

Chalmers, Industrial and Materials Science, Materials and manufacture

Changhai Li

Surface and Microstructure Engineering

Coatings

20796412 (eISSN)

Vol. 12 12 1980

Subject Categories

Tribology

Manufacturing, Surface and Joining Technology

Materials Chemistry

DOI

10.3390/coatings12121980

More information

Latest update

1/3/2024 9