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Metals 2017, 7(10), 420; doi:10.3390/met7100420

The Effect of Rolling Temperature on the Microstructure and Mechanical Properties of Surface-Densified Powder Metallurgy Fe-Based Gears Prepared by the Surface Rolling Process

1
Shanghai Automotive Powder Metallurgy Co. Ltd., Shanghai 201908, China
2
Shanghai Key Lab of Research & Development for Metal Functional Materials, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
*
Authors to whom correspondence should be addressed.
Received: 7 August 2017 / Revised: 14 September 2017 / Accepted: 25 September 2017 / Published: 10 October 2017
(This article belongs to the Special Issue Powder Synthesis and Processing)
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Abstract

In this investigation, the surface-rolling process was performed to improve the performance of PM (powder metallurgy) parts. Different rolling temperatures were applied and the effect of rolling temperature on the microstructure and mechanical properties of the surface dense layers in the samples were investigated. In the study, room temperature and temperatures of 100 °C, 200 °C, 300 °C were studied during the rolling process. The results confirmed that the sample prepared with a pre-heated temperature of 200 °C had the lowest porosity at the surface area. It also exhibited the highest surface hardness and wear resistance. The optimum rolling temperature was determined to be 200 °C and the related mechanism was discussed. View Full-Text
Keywords: powder metallurgy; rolling densification; warm rolling; warm deformation powder metallurgy; rolling densification; warm rolling; warm deformation
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Chen, D.; Li, D.; Peng, J.; Wang, T.; Yan, B.; Lu, W. The Effect of Rolling Temperature on the Microstructure and Mechanical Properties of Surface-Densified Powder Metallurgy Fe-Based Gears Prepared by the Surface Rolling Process. Metals 2017, 7, 420.

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