κ-碳化物对低密度超细珠光体组织细化的影响

doi:10.13228/j.boyuan.issn1006-9356.20220901

摘要
图/表
参考文献
相关文章 (3)

全文: PDF (9400 KB) HTML (0 KB)
输出: BibTeX | EndNote (RIS)

摘要低密度钢已成为开发满足安全和节能要求材料的研究热点,为实现材料的轻量化,推动绿色发展,在超高强度珠光体桥索钢的合金设计中加入适量的轻质元素中Mn(质量分数为5%)和中Al(质量分数为5%)以降低材料密度,其理论计算密度由7.85 g/cm³降至6.81 g/cm³,降幅达13.2 %。在相同珠光体等温处理(600 ℃-0.5 h和500 ℃-2.0 h)后,与传统珠光体钢相比,低密度珠光体钢抗拉强度和屈服强度显著提高,分别由(1 237±24) MPa提高到(1 247±37) MPa、(923±12) MPa提高到(1 171±34) MPa,伸长率稍微降低,由6.46%±0.20%降低到5.18%±0.06%,显微组织由传统的θ-珠光体(铁素体+渗碳体)转变为θ-珠光体和κ-珠光体(铁素体+渗碳体+κ-碳化物)。结果表明,添加适量的Al和Mn抑制C的扩散,提高珠光体的转变自由能,显著延缓珠光体的共析转变过程,同时超细珠光体的片层间距明显细化,团簇尺寸明显减小;促进了低密度珠光体钢中κ-碳化物的形成,其与位错的相互作用提高了材料的应变硬化,实现了超细珠光体桥索钢的低密度、超高强度的目标。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	作者相关文章
	张晨
	胡锋
	周杰
	周雯
	张东
	吴开明

关键词 ：低密度钢, 超细珠光体, κ-碳化物, 组织转化, 应变硬化

Abstract：Low density steel has become a research hotspot in the development of materials that meet the requirements of safety and energy saving. In order to achieve lightweight materials and promote green development, an appropriate amount of light elements medium Mn (mass fraction is 5%) and medium Al (mass fraction is 5%) were added to the alloy design of ultra-high strength pearlite cable steel to reduce the density of the steel. The theoretical density was reduced from 7.85 g/cm³to 6.81 g/cm³, and a decrease of 13.2%. At the same pearlite isothermal temperature (600 ℃-0.5 h and 500 ℃-2.0 h), compared with the traditional pearlite steel, the tensile strengthand yield strength of low density pearlite steel significantly increased (from (1 237±24) MPa to (1 247±37) MPa, (923±12) MPa to(1 171 ±34) MPa, respectively),while the elongation slightly decreased(from 6.46%±0.20% to 5.18%±0.06%), and the microstructure changed from traditional θ-pearlite (ferrite+ cementite) to θ-pearlite and κ-pearlite (ferrite + cementite + κ-carbide). The results show that the addition of appropriate amount of Al and Mn can restrain the diffusion of C, increase the transformation free energy of pearlite, significantly delay the eutectoid transformation process of pearlite, refine the lamellar spacing of ultra-fine pearlite and obviously reduce the cluster size. It also promotes the formation of κ-carbide in low density pearlite steel, the interaction between κ-carbide and dislocation improves the strain hardening of the material, and comprehensively realizes the goal of low density and ultra-high strength of ultra-fine pearlite bridge cable steel.

Key words： low density steel ultra-fine pearlite κ-carbide microstructure transformation strain hardening

收稿日期: 2022-11-18

基金资助:国家自然科学基金资助项目(U20A20279); 中国博士后科学基金资助项目(2021M700875); 湖北省重点研究发展计划资助项目(2021BAA057); 高等学校学科创新与人才引进计划(111计划)资助项目; 武汉科技大学国防预研基金资助项目(GF202016)

通讯作者: 胡锋(1986—), 男, 博士, 副教授; E-mail: hufeng@wust.edu.cn

作者简介: 张晨(1996—), 男, 硕士生; E-mail: zc18634695364@163.com

引用本文:

张晨, 胡锋, 周杰, 周雯, 张东, 吴开明. κ-碳化物对低密度超细珠光体组织细化的影响[J]. 中国冶金, 2023, 33(5): 60-70. ZHANG Chen, HU Feng, ZHOU Jie, ZHOU Wen, ZHANG Dong, WU Kai-ming. Effect of κ-carbide on microstructure refinement of ultra-fine pearlite in low density steel[J]. China Metallurgy, 2023, 33(5): 60-70.

链接本文:

http://www.zgyj.ac.cn/CN/10.13228/j.boyuan.issn1006-9356.20220901 或 http://www.zgyj.ac.cn/CN/Y2023/V33/I5/60

[1]	Borchers C,Kirchheim R. Cold-drawn pearlitic steel wires[J]. Progress in Materials Science,2016,82:405.
[2]	闫志刚,薛花娟. 沪通长江大桥直径 7 mm 2 000 MPa 级钢丝试验研究[J]. 铁道学报,2018,40(7):115.
[3]	黄芳玉. 2 000 MPa 级桥索钢冷拉拔过程中组织性能演变规律研究[D]. 武汉:武汉科技大学,2019.
[4]	Kim S H,Kim H,Kim N J. Brittle intermetallic compound makes ultrastrong low-density steel with large ductility[J]. Nature,2015,518(7537):77.
[5]	Chen S,Rana R,Haldar A,et al. Current state of Fe-Mn-Al-C low density steels[J]. Progress in Materials Science,2017,89:345.
[6]	章小峰,李家星,万亚雄,等. 低密度钢中有序析出相的研究进展[J].材料导报,2019,33(23):3979.
[7]	YI H L,CHEN P,HOU Z Y,et al. A novel design:Partitioning achieved by quenching and tempering (Q-T-P) in an aluminium-added low-density steel[J]. Scripta Materialia,2013,68(6):370.
[8]	FENG L,HU F,ZHOU W,et al. Influences of alloying elements on continuous cooling phase transformation and microstructures of extremely fine pearlite[J]. Metals,2019,9(1):70.
[9]	马涛,李慧蓉,高建新,等. 合金元素及时效处理对Fe-Mn-Al-C低密度钢中κ-碳化物的影响特性综述[J]. 材料导报,2020,34(11):11153.
[10]	Kim H,Suh D W,Kim N J. Fe-Al-Mn-C lightweight structural alloys:A review on the microstructures and mechanical properties[J]. Science and Technology of Advanced Materials,2013,14(1):014205.
[11]	王凤权,孙挺,王毛球,等. Fe-Mn-Al-C 系奥氏体基低密度钢的研究进展[J]. 钢铁,2021,56(6):89.
[12]	邢梅,林方敏,唐立志,等.黄贞益Al元素对Fe-Mn-Al-C系低密度钢的影响特性综述[J]. 中国冶金,2022,32 (2):15.
[13]	LU W J,ZHANG X F,QIN R S. Structure and properties of κ-carbides in duplex lightweight steels[J]. Ironmaking and Steelmaking,2015,42(8):626.
[14]	Ishii H,Ohkubo K,Miura S,et al. Mechanical properties of α+κ two-phase lamellar structure in Fe-Mn-Al-C alloy[J]. Materials Transactions,2003,44(9):1679.
[15]	Han S Y,Shin S Y,Lee S,et al. Effect of carbon content on cracking phenomenon occurring during cold rolling of three light-weight steel plates[J]. Metallurgical and Materials Transactions A,2011,42(1):138.
[16]	Shin S Y,Lee H,Han S Y,et al. Correlation of microstructure and cracking phenomenon occurring during hot rolling of lightweight steel plates[J]. Metallurgical and Materials Transactions A,2010,41(1):138.
[17]	ZHANG J,JIANG Y,ZHENG W,et al. Revisiting the formation mechanism of intragranular κ-carbide in austenite of a Fe-Mn-Al-Cr-C low-density steel[J]. Scripta Materialia,2021,199:113836.
[18]	Ohashi T,Roslan L,Takahashi K,et al. A multiscale approach for the deformation mechanism in pearlite microstructure:Numerical evaluation of elasto-plastic deformation in fine lamellar structures[J]. Materials Science and EngineeringA,2013,588:214.
[19]	Yasuda Y,Ohashi T,Shimokawa T,et al. Strain-hardening characteristics of ferrite layers in pearlite microstructure[J]. Materials Science and Technology,2018,34(7):772.
[20]	ZHOU J,HU C Y,HU F,et al. Insight into the effect of Nb microalloying on the microstructure-property relationship of a novel wire rod[J]. Journal of Materials Research and Technology,2022,16:276.
[21]	PANG J C,YANG W F,WANG G D,et al. Divorced eutectoid transformation in high-Al added steels due to heterogenous nucleation of κ-carbide[J]. Scripta Materialia,2022,209:114395.
[22]	LIU S,ZHANG F,YANG Z,et al. Effects of Al and Mn on the formation and properties of nanostructured pearlite in high-carbon steels[J]. Materials and Design,2016,93:73.
[23]	Andersson J O,Helander T,Höglund L,et al. Thermo-Calc-Dictra,computational tools for materials science[J]. Calphad,2002,26(2):273.
[24]	Pandit A S,Bhadeshia H. Mixed diffusion-controlled growth of pearlite in binary steel[J]. Proceedings of the Royal Society A:Mathematical,Physical and Engineering Sciences,2011,467(2126):508.
[25]	曹晨星,王存宇,曹文全.FeMnAlC低密度钢中κ-碳化物形成机理[J].金属热处理,2021,46(12):1.
[26]	CHEN P,LI X,YI H. The κ-carbides in low-density Fe-Mn-Al-C steels:A review on their structure,precipitation and deformation mechanism[J]. Metals,2020,10(8):1021.
[27]	吴志强.高强度高塑性低密度钢的组织性能和变形机制研究[D]. 沈阳:东北大学,2015.
[28]	Yao M J,Dey P,Seol J B,et al. Combined atom probe tomography and density functional theory investigation of the Al off-stoichiometry of κ-carbides in an austenitic Fe-Mn-Al-C low density steel[J]. Acta Materialia,2016,106:229.
[29]	Lee K,Park S J,Lee J,et al. Effect of aging treatment on microstructure and intrinsic mechanical behavior of Fe-31.4 Mn-11.4 Al-0.89 C lightweight steel[J]. Journal of Alloys and Compounds,2016,656:805.
[30]	Dey P,Nazarov R,Dutta B,et al. Ab initio explanation of disorder and off-stoichiometry in Fe-Mn-Al-C κ carbides[J]. Physical Review B,2017,95(10):104108.
[31]	AN X L,LIU Z D,ZHANG L T,et al. A new strong pearlitic multi-principal element alloy to withstand wear at elevated temperatures[J]. Acta Materialia,2022,227:117700.
[32]	Tomellini M,Fanfoni M. Connection between phantom and spatial correlation in the Kolmogorov-Johnson-Mehl-Avrami-model:A brief review[J]. Physica A:Statistical Mechanics and its Applications,2021:126748.
[33]	刘硕.高碳纳米珠光体钢轨钢组织与性能的研究[D].秦皇岛:燕山大学,2015.
[34]	Capdevila C,Caballero F G,De Andrés C G. Neural network model for isothermal pearlite transformation. part II:Growth rate[J]. ISIJ International,2005,45(2):238.
[35]	ZHOU J,HU F,WU K M,et al. Ultrafine pearlitic transformation behavior of 2000 MPa ultra-high-strength steel wire under nb microalloying[J]. Steel Research International,2021,92(4):2000516.
[36]	YANG F M,CHEN P,LI X W. The Microstructure evolution during divorced eutectoid transformation in a κ-carbide reinforced high specific Young’s modulus steel[J].Crystals,2022,12(10):1372.
[37]	CHEN P,XIONG X C,WANG G D,et al. The origin of the brittleness of high aluminum pearlite and the method for improving ductility[J]. Scripta Materialia,2016,124:42.
[38]	YI H L,CAI H L,HOU Z Y,et al. Low density steel 1.2C-1.5Cr-5Al designed for bearings[J]. Materials Science and Technology,2014,30(9):1045.
[39]	Hasan S M,Mandal A,Singh S B,et al. Work hardening behaviour and damage mechanisms in carbide-free bainitic steel during uni-axial tensile deformation[J]. Materials Science and EngineeringA,2019,751:142.
[40]	Zargaran A,Trang TTT,Park G,et al. κ-Carbide assisted nucleation of B2:A novel pathway to develop high specific strength steels[J]. Acta Materialia,2021,220:117349.
[41]	ZHOU Y T,SHAO X H,ZHENG S J,et al. Structure evolution of the Fe3C/Fe interface mediated by cementite decomposition in cold-deformed pearlitic steel wires[J]. Journal of Materials Science and Technology,2022,101:28.
[42]	姚莉丽,底华芳,王威,等.珠光体钢丝冷变形加工硬化行为研究[J]. 热加工工艺,2017,46(1):69.