一步配分工艺对低合金耐磨钢组织性能的影响

doi:10.11896/cldb.18070167

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Abstract Effect of one-step partitioning process on the microstructure evolutions, mechanical properties, retained austenite content and morphology of a low alloy wear-resistant steel were studied by means of the scanning electron microscope (SEM), X-ray diffraction (XRD) and transmission electron microscope (TEM). The results indicate that the microstructure is consisted of the lath primary martensite, block fresh martensite and retained austenite in the wear-resistant steel after partitioning treatment, the retained austenite is emerged in the form of thin film between martensite laths (width about 100 nm) and block along the grain boundaries (about 300—400 nm in size). As the increase of partitioning tempe-rature, the content of initial martensite decreases and the fresh martensite increases gradually, the content of retained austenite and the carbon content of the steel increase first and then decrease; as the increase of partitioning time, the martensite boundary becomes blurred and the precipitates increase, the content of retained austenite also increase first and then decrease, and the higher the retained austenite content, the better the ductility of the material. When partitioning temperature is 235 ℃ and time is 30 min, the content of retained austenite is highest, 8.1vol%; the carbon content is 1.02wt%, the hardness of the steel is 52.3HRC and the elongation is 12%.

Key words： low alloy wear-resistant steel partitioning process retained austenite plastic toughness

Published: 31 July 2019

CLC number:

TG156.1

Fund:This work was financially supported by the “Technical Upgrading and Industrialization of Key Basic Materials” of National Key Research and Development Program of China (2017YFB0305100).

About author:: Jian Lireceived his B.E. degree from Wuhan University of Science and Technology in 2016. He is currently pursuing his master's degree at the School of Materials and Metallurgy, Wuhan University of Science and Technology under the supervision of Prof. Juan Jia. His research has focused on strengthening and toughening of materials.
Juan Jiareceived her Ph.D. degree in materials scie-nce from University of Science & Technology Beijing in 2007. She is a professor in metal material major, Wuhan University of Science and Technology now and her research interests are strengthening, toughening and anisotropy of materials.

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	LI Jian
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	SONG Xinli
	SUN Xinjun
	FAN Lixia
	MA Yuxi
	LIANG Xiaokai

Cite this article:

LI Jian,JIA Juan,SONG Xinli, et al. Effect of One-step Partitioning Process on Microstructure and Properties of Low Alloy Wear-resistant Steel[J]. Materials Reports, 2019, 33(18): 3113-3118.

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http://www.mater-rep.com/EN/10.11896/cldb.18070167 OR http://www.mater-rep.com/EN/Y2019/V33/I18/3113

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