Effects of Cr-Fe Particle Size on Friction and Wear Properties of Copper-based Powder Metallurgy Materials
Copper-based powder metallurgy materials with different Cr-Fe particle sizes was fabricated by powder met-allurgy hot pressing sintering process,and friction and wear tests at different brake speeds were carried out.The influ-ence of Cr-Fe particle size on microstructure,relative density,mechanical properties and friction properties of the alloy was investigated.The results indicate that Cr-Fe particles are uniformly distributed in the matrix under different par-ticle sizes.With the increase of Cr-Fe particle size,the structure continuity of copper-based powder metallurgy friction materials becomes worse.The hardness and sintered relative density are increased at first and then decreased,and the friction coefficient is firstly increased and then decreased.With the increase of braking speed,the friction coefficients are gradually reduced,and the wear rate is gradually increased.The friction and wear properties of copper-based pow-der metallurgy materials are desirable with the Cr-Fe particle size of 100 mesh.
Friction MaterialsPowder MetallurgyCu MatrixFriction and Wear
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