两相区形变对含铜低碳钢合金元素配分的影响

doi:10.11896/cldb.201906022

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Abstract The purpose of the present work was to study a novel heat treatment process, i.e. intercritical deformation-intercritical annealing-quenching (DIQ), for the microstructure improvement of copper-bearing low-carbon steel. The thermal simulation test was conducted and the microscopic observation of SEM and TEM were employed to analyze the microstructure evolution, dislocation density, and Mn, Cu elements partitioning and distribution within the Cu-bearing low-carbon steel specimens experienced the DIQ processes differing in deformation extent. The results indicated that, for the experimental steel processed by simulated DIQ, a larger deformation extent can lead to the refinement of ferrite and martensite, the gradual increase in dislocation density, and the biphasic change (enhanced → attenuated) of the alloy elements partitioning beha-vior. Through the DIQ treatment with 10% deformation, the best partitioning of Mn and Cu atoms could be achieved, as the average concentration of Mn and Cu within martensite increased by 62.82% and 20.73%, respectively, compared with the original steel specimen.

Key words： copper-bearing low-carbon steel intercritical deformation dislocation multiplication vacancy alloy elements partitioning

Published: 03 April 2019

CLC number:

TG142.1

Fund:This work was financially supported by the National Natural Science Foundation of China (51574107), Nature Science Foundation of Hebei Province, China (E2016209048, E2017209048), Science and Technology Innovation Team of Tangshan (15130202C), and Graduate Innovation Project of Hebei Province (2017S01).

About author:: Liansheng Chen received his B.E. degree in steel rolling from Tangshan Institute of Technology in 1990 and received his Ph.D. degree in material processing engineering from Northeastern University, in 2008. Yaqiang Tian received his B.E. degree in metal wor-king process from Hebei Institute of Technology in 2002 and received his Ph.D. degree in material processing engineering from University of Science and Technology Beijing, in 2009.

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	CHEN Liansheng
	LI Yue
	TIAN Yaqiang
	ZHENG Xiaoping
	WEI Yingli
	SONG Jinying

Cite this article:

CHEN Liansheng,LI Yue,TIAN Yaqiang, et al. Effect of Intercritical Deformation on Alloy Elements Partitioning of Copper-bearing Low-carbon Steel[J]. Materials Reports, 2019, 33(6): 1032-1035.

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http://www.mater-rep.com/EN/10.11896/cldb.201906022 OR http://www.mater-rep.com/EN/Y2019/V33/I6/1032

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