Study on Bainitic Microstructure under Low Austempering Temperature and its Wear Resistance of Low-Alloy High-Carbon Steel

Jing Yang; Zhi Bin Wang; Hai Liang Zhang; Xiao Long Liang

doi:10.4028/www.scientific.net/AMR.750-752.361

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 750-752Study on Bainitic Microstructure under Low...

Study on Bainitic Microstructure under Low Austempering Temperature and its Wear Resistance of Low-Alloy High-Carbon Steel

Abstract:

A new low-alloy high-carbon steel was designed to obtain the carbide-free bainite under low-temperature austempering. The microstructure, wear resistance under dry sliding friction and the wear mechanism were comparatively studied between samples austempered and low-temperature tempered. Results show that the carbide-free bainitic microstructure composed of bainitic ferrite laths with mean thickness of 120 nm and retained austenite films can be achieved by austempering at 220 °C for 120 h in salt bath after austenitizing at 1000 °C. The wear resistance under dry sliding friction of austempered sample is 19% more than that of low-temperature tempered sample. The wear mechanism of the low-temperature austempered sample is determined as the adhesive wear.

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Periodical:

Advanced Materials Research (Volumes 750-752)

Pages:

361-364

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.750-752.361

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Online since:

August 2013

Authors:

Jing Yang, Zhi Bin Wang, Hai Liang Zhang, Xiao Long Liang

Keywords:

Austempering, Carbide-Free Bainite, Low-Alloy High-Carbon Steel, Wear Resistance

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