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Effect of Solution Temperature on Microstructure and Properties of Thixotropic Back-Extruded Tin–Bronze Shaft Sleeve.

Authors :
Zhou, Yuhang
Cui, Yunxin
Zhang, Qingbiao
Yang, Zhiqiang
Li, Yongkun
Xiao, Han
Source :
Materials (1996-1944). Aug2022, Vol. 15 Issue 15, p5254-5254. 13p.
Publication Year :
2022

Abstract

To study the heat-treatment process of a semi-solid copper alloy, a thixotropic back-extruded tin–bronze shaft sleeve was heat-treated at 630 °C, 660 °C, 690 °C and 720 °C for 1 h, respectively. Microstructure changes and mechanical properties under different solution temperatures of shaft sleeve were characterized using a metallographic microscope (OM), scanning electron microscope (SEM), transmission electron microscope (TEM), hardness tester, and tensile tester. The results show that the tensile strength first increases and then decreases; the elongation decreases; and the Brinell hardness increases gradually with increasing solution temperature. When the solution treatment is at 690 °C, the tin–bronze shaft sleeve's microstructure and comprehensive mechanical properties are the best. The shape factor is 0.75, the average grain size is 82.52 μm, the Brinell hardness is 122 HBW, the tensile strength is 437 MPa, and the elongation is 17.4%, which is 3.4 times higher than that before solution treatment. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
19961944
Volume :
15
Issue :
15
Database :
Academic Search Index
Journal :
Materials (1996-1944)
Publication Type :
Academic Journal
Accession number :
158518872
Full Text :
https://doi.org/10.3390/ma15155254