固态脱碳法制备高强塑性成分梯度中锰钢

doi:10.13228/j.boyuan.issn0449-749x.20220754

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (2480 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract The strength-ductility trade-off has been a long-standing dilemma in materials science. Many organisms have evolved over millions of years through natural selection and optimization. In many biological systems,structures such as bones and plant stems change gradually from the surface to the interior. This gradient structure can make biological systems strong and tough to survive severe natural forces. A process strategy of solid state decarbonization for preparing composition gradient steel was proposed,breaking the trade-off relationship between strength and ductility. In order to verify the feasibility of this technological concept,solid state decarburization research was carried out with alloy thickness of 1 mm and composition of 2.7%C-12%Mn-Fe(mass percent)as the research object. Excellent strength and ductility of manganese steels prepared in this experiment have been obtained. The experimental results show that the solid state decarbonization method has achieved surprising success in the preparation of medium manganese steels. The carbon mass percent of medium manganese steel can be removed from 2.7% to 0.23% in H₂O-H₂ atmosphere for 50 min. The component gradient was measured by glow discharge spectrometer and optical microscope. The decarbonized and hot rolled medium manganese steel plates have obvious composition gradient and holistic gradient structure in the thickness direction. This holistic gradient structure is a key factor to guarantee the deformability of the medium manganese steel. The cross section hardness distribution of medium manganese steel was measured by Vickers hardness tester. Solid state decarbonization inevitably creates a thick transition layer in the interior and directly resulting in a gradually increased hardness from the surface of the centre layer (668HV) to the interior (747HV). This unique hardness gradient is inherent to the compositional gradient material and lays the foundation for continuous strain hardening. When the homogeneous steel is deformed to increase strength,its ductility usually drops dramatically. In contrast,the strength of compositional gradient steel increased from 1 339.1 MPa to 1 513.5 MPa and the ductility increased from 26.3% to 29.8%. This indicates that the strategy of solid state decarbonization to prepare compositional gradient steels has obtained good comprehensive mechanical properties. More importantly,the proposed strategy is a general conception,and other metal material such as DP,QP,HSLA and PHS,can also be selected. This is also the future focus.

Key words： solid state decarbonization component gradient medium manganese steel microstructure mechanical property

Received: 06 December 2022

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	HONG Lu-kuo
	AI Li-qun
	SUN Cai-jiao
	LI Ya-qiang
	ZHOU Mei-jie
	MENG Fan-jun

Cite this article:

HONG Lu-kuo,AI Li-qun,SUN Cai-jiao等. Preparation of medium manganese steel high strength plastic with composition gradient by solid state decarbonization[J]. Iron and Steel, 2023, 58(5): 131-136.

URL:

http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20220754 OR http://www.chinamet.cn/Jweb_gt/EN/Y2023/V58/I5/131

[1] 王存宇,杨洁,常颖,等. 先进高强度汽车钢的发展趋势与挑战[J]. 钢铁,2019,54(2):1.(WANG Cun-yu,YANG Jie,CHANG Ying,et al. Development trend and challenge of advanced high strength automobile steels[J]. Iron and Steel,2019,54(2):1.)
[2] 邓素怀,王全礼,张慧峰,等. 回火温度对中锰钎杆钢微观组织和力学性能的影响[J]. 中国冶金,2021,31(11):16. (DENG Su-huai,WANG Quan-li,ZHANG Hui-feng,et al. Effect of tempering temperature on microstructure and mechanical properties of medium manganese drill rod steel[J]. China Metallurgy,2021,31(11):16. )
[3] WU Xiao-lei,JIANG Ping,CHEN Liu,et al. Extraordinary strain hardening by gradient structure[J]. Proceedings of the National Academy of Sciences of the United States of America,2014,111(20):7197.
[4] WEI Yu-jie,LI Yong-qiang,ZHU Lian-chun,et al. Evading the strength-ductility trade-off dilemmain steel through gradient hierarchical nanotwins[J]. Nature Communications,2014,5:1.
[5] YANG Zhi-nan,JIANG Feng,WANG Yao-min,et al. Making composite steel higher strength and higher ductility via introducing carbon diffusion strategy[J]. Materials Research Letters,2021,9(9):391.
[6] CHEN Jin-xi,LI Tong,CHEN Yan,et al. Ultra-strong heavy-drawn eutectic high entropy alloy wire[J]. Acta Materialia,2023,243:118515.
[7] 洪陆阔,艾立群,孙彩娇,等. 一种生产中高锰钢板带的工艺及装置:中国,ZL 2020 1 1223612.9[P].2022-07-12.(HONG L K,AI L Q,SUN C J,et al. The Invention Relates to a Process and Device for Producing Medium and High Manganese Steel Plate Strip:China,ZL 2020 1 1223612.9[P]. 2022-07-12.)
[8] 侯耀斌,艾立群,洪陆阔,等. CO/CO₂气氛下Fe-C合金气固反应脱碳[J]. 钢铁,2020,55(11):133.(HOU Yao-bin,AI Li-qun,HONG Lu-kuo,et al. Gas-solid reaction decarburization of Fe-C alloy in CO/CO₂[J]. Iron and Steel,2020,55(11):133.)
[9] 周美洁,艾立群,洪陆阔,等. CO₂和H₂O气氛下Fe-C合金薄带脱碳对比[J]. 钢铁,2021,56(5):49.(ZHOU Mei-jie,AI Li-qun,HONG Lu-kuo,et al. Comparison of decarburization of Fe-C alloy strips in CO₂ and H₂O atmosphere[J]. Iron and Steel,2021,56(5):49.)
[10] 孙彩娇,艾立群,洪陆阔,等. H₂/H₂O气氛下Fe-C合金气固反应脱碳机理[J]. 材料导报,2020,34(10):20112.(SUN Cai-jiao,AI Li-qun,HONG Lu-kuo,et al. Mechanism of carbon diffusion in solid state steelmaking from the Fe-C alloy strip through gas-solid decarburization in H₂/H₂O[J]. Materials Reports,2020,34(10):20112.)
[11] 艾立群,侯耀斌,洪陆阔,等. H₂/H₂O气氛下Fe-C合金薄带气固脱碳反应动力学[J]. 工程科学学报,2021,43(6):816.(AI Li-qun,HOU Yao-bin,HONG Lu-kuo,et al. Gas-solid reaction kinetics of decarburization of Fe-C alloy strips in H₂/H₂O[J]. Chinese Journal of Engineering,2021,43(6):816.)
[12] 洪陆阔,艾立群,程荣,等. 铁碳合金薄带气固反应脱碳试验[J]. 钢铁,2016,51(3):27.(HONG Lu-kuo,AI Li-qun,CHENG Rong,et al. Experimental of gas-solid decarburization of Fe-C alloy ribbon[J]. Iron and Steel,2016,51(3):27.)
[13] 李亚强,艾立群,李强,等. 1 mm铁碳合金薄带气-固反应脱碳试验[J]. 钢铁,2017,52(5):19.(LI Ya-qiang,AI Li-qun,LI Qiang,et al. Experiment of gas-solid decarburization process of 1 mm Fe-C alloy ribbon[J]. Iron and Steel,2017,52(5):19.)
[14] 李亚强. 气氛条件对铁碳合金薄带气-固反应脱碳的影响[D]. 唐山:华北理工大学,2016.(LI Ya-qiang. The Influence of Atmosphere Condition on Iron Sheet Gas-Solid Decarburization Process[D]. Tangshan:North China University of Science and Technology,2016.)
[15] 孟凡峻,艾立群,洪陆阔,等. Ar-H₂O-H₂气氛下Fe-C-Mn薄带脱碳试验研究[J]. 钢铁钒钛,2021,42(5):132.(MENG Fan-jun,AI Li-qun,HONG Lu-kuo,et al. Experimental study on decarbonization of Fe-C-Mn thin strips in Ar-H₂O-H₂ atmosphere[J]. Iron Steel Vanadium Titanium,2021,42(5):132.)
[16] SUN Cai-jiao,AI Li-qun,HONG Lu-kuo,et al. Study on solid state steelmaking from thin cast iron sheets through decarburization in H₂O-H₂[J]. Ironmaking and Steelmaking,2020,47(9):1015.