Enhancement of Strength by Multiple Rolling at Room Temperature in the 1045 Steel Prepared by Aluminothermic Reaction

doi:10.1002/srin.201800556

	Enhancement of Strength by Multiple Rolling at Room Temperature in the 1045 Steel Prepared by Aluminothermic Reaction
	Li, Zhengning; La, Peiqing; Ma, Jiqiang; Guo, Xin; Sheng, Jie; Shi, Yu; Zhou, Xueyuan
刊名	STEEL RESEARCH INTERNATIONAL
	2019-05
卷号	90 期号:5
关键词	1045 steel cementite particles mechanical properties microstructure rolling
ISSN号	1611-3683
DOI	10.1002/srin.201800556
英文摘要	The effects of cold rolling on the microstructure and mechanical properties of 1045 steel prepared by aluminothermic reaction casting method are investigated. It is found that an ultrafine-grained ferrite (alpha)+submicron/nano-cementite particle (theta) structure is formed by rolling at room temperature with different thickness reduction. With the increase of thickness reduction, many lamella cementites are squeezed, a portion of cementite is crushed, the dislocation density increases, meanwhile the tensile strength is improved significantly. The underlying mechanisms of enhancing mechanical properties are analyzed, with a focus on the heterogeneous composite structure of a soft fine-grained matrix embedded with hard nano-scale cementite particles. The yield strength and ultimate tensile strength are increased from 256MPa and 490MPa (As-casting) to 939MPa and 956MPa at 84% thickness reduction. The tensile strength of rolled steel with 70% thickness reduction is 1.5 times than common 1045 carbon steel, but it also has a considerable ductility, resulting from the enhancement caused by refined ferrite grains and cementite particles.
资助项目	National Natural Science Foundation of China[51561020]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000477083800017
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/31879]
专题	学科建设与学位办公室材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
通讯作者	La, Peiqing
作者单位	Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Li, Zhengning,La, Peiqing,Ma, Jiqiang,et al. Enhancement of Strength by Multiple Rolling at Room Temperature in the 1045 Steel Prepared by Aluminothermic Reaction[J]. STEEL RESEARCH INTERNATIONAL,2019,90(5).
APA	Li, Zhengning.,La, Peiqing.,Ma, Jiqiang.,Guo, Xin.,Sheng, Jie.,...&Zhou, Xueyuan.(2019).Enhancement of Strength by Multiple Rolling at Room Temperature in the 1045 Steel Prepared by Aluminothermic Reaction.STEEL RESEARCH INTERNATIONAL,90(5).
MLA	Li, Zhengning,et al."Enhancement of Strength by Multiple Rolling at Room Temperature in the 1045 Steel Prepared by Aluminothermic Reaction".STEEL RESEARCH INTERNATIONAL 90.5(2019).