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New processing routes of fabricating high-strength bainitic steels with high hardness and better corrosion resistance |
CAI Feng1,2, LIU Man1,2, XU Guang1,2 |
1. State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China; 2. Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan 430081, Hubei, China |
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Abstract The wear resistance and corrosion resistance of bainitic steels are highly required in railway transportation and construction machinery,and boronization and chromizing are common effective methods to improve surface hardness and corrosion resistance. In the existing research work,the austempering for obtaining bainite matrix and surface modification technologies for strengthening surface are carried out separately. The processing route is complicated and increases the production cost. New processing routes for fabricating medium-carbon high-strength bainite steels with high surface hardness and high corrosion resistance were proposed,which integrated the surface modification technologies and austempering. The new processes routes can not only simplify the processing treatment,but also reduce the production cost and environmental pollution. The integrated process of boriding/chromizing and austempering (boro-austempering/chro-austempering) were utilized to fabricate medium-carbon high-strength bainitic steel with high surface hardness and corrosion resistance. The effects of boro-austempering and chro-austempering processes on the microstructure and properties of a bainitic steel were compared and analyzed by means of microstructural observation,hardness test and corrosion experiment. The results show that,compared with only austempering process,extremely hard chromizing layer and boronization layer with Vickers hardness of over 1 500HV(about 3.3 times that of bainite matrix) were synthesized on the bainitic steel surface,and the corrosion performance in 0.5% NaCl solution was obviously improved by chro-austempering and boro-austempering treatments. After being exposed to 0.5% NaCl solution for 3 h,the boro-austempered steel yielded better corrosion resistance. A new type of high strength bainitic steel with bainite as substrate and produced layers on the surface can be fabricated by two integrated processes. Under the same treating time,compared with the chro-austempering process,the boro-austempered steel showed a faster growth rate of the boronization layer and the higher adhesion strength between the boronization layer and the bainite steel matrix.
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Received: 13 January 2022
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[1] 姚耔杉,胡海江,田俊羽,等. 铬和铝元素对低碳贝氏体钢组织和性能影响[J]. 钢铁,2020,55(12):66.(YAO Zi-shan,HU Hai-jiang,TIAN Jun-yu,et al. Effect of Cr and Al on microstructure and properties of low carbon bainitic steels[J]. Iron and Steel,2020,55(12):66.) [2] 邹航,刘曼,徐光. 轧后冷却条件对低碳贝氏体钢组织性能的影响[J]. 钢铁,2021,56(9):1.(ZOU Hang,LIU Man,XU Guang. Effect of cooling conditions after rolling on microstructure and properties of a low-carbon bainitic steel[J]. Iron and Steel,2021,56(9):1.) [3] 陈光辉,徐光,胡海江,等. 1.6 GPa级中碳高强贝氏体钢残余奥氏体调控机理[J]. 钢铁,2021,56(2):110.(CHEN Guang-hui,XU Guang,HU Hai-jiang,et al. Controlling mechanism of retained austenite in a 1.6 GPa grade medium-carbon high-strength bainitic steel[J]. Iron and Steel,2021,56(2):110.) [4] 严恒,胡锋,王坤,等. 30 GPa·%级中碳贝氏体钢中残余奥氏体的调控机理[J]. 中国冶金,2021,31(7):22.(YAN Heng,HU Feng,WANG Kun,et al. Mechanism of residual austenite in medium-carbon bainite steel of 30 GPa·% level[J]. China Metallurgy,2021,31(7):22.) [5] LIU M,XU G,TIAN J Y,et al. Effect of austempering time on microstructure and properties of a low-carbon bainite steel[J]. International Journal of Minerals,Metallurgy and Materials,2020,27(3):340. [6] 刘曼,胡海江,田俊羽,等. 贝氏体钢等温淬火和淬火-配分复合工艺[J]. 钢铁,2021,56(1):69.(LIU Man,HU Hai-jiang,TIAN Jun-yun,et al. Integrated austempering and quenching-partitioning process of a bainitic steel[J]. Iron and Steel,2021,56(1):69.) [7] 秦羽满,李艳国,张明,等. 细化渗碳体对高碳纳米贝氏体轴承钢的影响[J]. 中国冶金,2020,30(9):104.(QIN Yu-man,LI Yan-guo,ZHANG Ming,et al. Effect of refined cementite on nanostructured bainitic bearing steel[J]. China Metallurgy,2020,30(9):104.) [8] ZHU M,XU G,ZHOU M X,et al. Effects of tempering on the microstructure and properties of a high-strength bainite rail steel with good toughness[J]. Metals,2018,8(7):484. [9] 施良才,吴晓春,姚杰,等. H13钢两段固体渗硼动力学及其高温耐磨损性能的研究[J]. 上海金属,2017,39(4):25.(SHI Liang-cai,WU Xiao-chun,YAO Jie,et al. Study on kinetic of double-stage packing boriding and wear resistance at elevated temperature for H13 steel[J]. Shanghai Metals,2017,39(4):25.) [10] LI Y G,ZHANG F C,CHEN C,et al. Effects of deformation on the microstructures and mechanical properties of carbide-free bainitic steel for railway crossing and its hydrogen embrittlement characteristics[J]. Materials Science and Engineering:A,2016,651:945. [11] 李绍宏,何文超,张旭,等. H13型热作模具钢表面改性技术研究进展[J]. 钢铁,2021,56(3):13.(LI Shao-hong,HE Wen-chao,ZHANG Xu,et al. Research progress on surface treatment technologies of H13 hot work die steel[J]. Iron and Steel,2021,56(3):13.) [12] 杨浩鹏,吴晓春. H13钢低温固体渗硼及其热熔损性能的研究[J]. 上海金属,2019,41(4):23.(YANG Hao-peng,WU Xiao-chun. Study on the low-temperature pack boriding and erosion property of H13 steel[J]. Shanghai Metals,2019,41(4):23.) [13] Mariani F E,Bortoluci de Assis G,Casteletti L C,et al. Austempering and boro-austempering treatments in gray cast iron[J]. Materials Performance and Characterization,2017,6(1):262. [14] Fabijanic D,Timokhina I,Beladi H,et al. The nitrocarburising response of low temperature bainite steel[J]. Metals,2017,7(7):234. [15] Mariani F E,Soares C,Neto A L,et al. Boro-austempering treatment of ductile cast irons[J]. Materials Research,2018,21:1. [16] Oliveira P G B D,Mariani F E,Casteletti L C,et al. Boro-austempering treatment of high-strength bainitic steels[J]. Journal of Materials Engineering and Performance,2020,17:3486. [17] LIU M,WANG Z T,PAN C G,et al. Microstructure and properties of a medium-carbon high-strength bainitic steel treated by boro-austempering treatment[J]. Steel Research International,2020,91(9):2000128. [18] TIAN J Y,XU G,JIANG Z Y,et al. In-Situ observation of martensitic transformation in a Fe-C-Mn-Si bainitic steel during austempering[J]. Metals and Materials International,2020,26:961. [19] LIU Z Y,LI X G,CHENG Y F,In-situ characterization of the electrochemistry of grain and grain boundary of an X70 steel in a near-neutral pH solution[J]. Electrochemistry Communications,2010,12(7):936. [20] Yan M,Gelling V J,Hinderliter B R,et al. SVET method for characterizing anti-corrosion performance of metal-rich coatings[J]. Corrosion Science,2010,52(8):2636. [21] Türkmen L,Yalamaç E,Keddam M. Investigation of tribological behaviour and diffusion model of Fe2B layer formed by pack-boriding on SAE 1020 steel[J]. Surface and Coatings Technology,2019,377:124888. [22] 路鹏程. 低合金工具钢复合TD渗铬试验研究[D]. 武汉:武汉理工大学,2011.(LU Peng-cheng. Research on Complex TD Chromizing of Low-alloy Tool Steels[D]. Wuhan:Wuhan University of Technoloyg,2011.) [23] Verein Deutscher Ingenieure. VDI 3198 Verein Deutscher Ingenieure Normen[S]. Dusseldorf:VDI-Verlag,1991. [24] Sireli G K,Bora A S,Timur S. Evaluating the mechanical behavior of electrochemically borided low-carbon steel[J]. Surface and Coatings Technology,2020,381:125177. |
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