Evolution of silicon-manganese phase at high temperature and its effect on wear resistance of brasses containing silicon and manganese

doi:10.13251/j.issn.0254-6051.2020.03.004

Abstract

Abstract:

Four heat treatment processes on a Si-Mn brass with the Mn/Si ratio of 2 were carried out at 500 ℃ and 800 ℃ respectively for 1 h and 6 h. Then the microstructure, wear scar morphology and mechanical properties of the tested brass samples were analyzed and characterized by scanning electron microscope, white light interference, optical microscope and hardness tester. The results show that the wear resistance of the brass is improved after four kinds of heat treatment, and is the best when the heat treatment temperature is 800 ℃ and the holding time is 6 h. The fine Si-Mn phase in the brass is dissolved at 500 ℃, and more Si-Mn phase is dissolved into the matrix at 800 ℃. The friction and wear properties and hardness of the Si-Mn brass are improved by the precipitated slender and sharp Si-Mn phase.

Key words: silicon and manganese brasses, Si-Mn phase, heat treatment, friction and wear properties

CLC Number:

TG156.1

Tian Wu, Dai Jiaoyan, Bao Mingdong, Zhang Lijun, Chang Yongqiang, Wang Shimin, Yu Shengwang. Evolution of silicon-manganese phase at high temperature and its effect on wear resistance of brasses containing silicon and manganese[J]. HTM, 2020, 45(3): 15-19.

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