Abstract:In order to study the decarburization effect of Fe-C alloy strips in Ar-CO-CO2 atmosphere,the decarburization atmosphere was determined by a combination of thermodynamic analysis and experiments. The Fe-C alloy strips were decarburized in mixed 66.25%Ar-25%CO-8.75CO2gas. Taking the Fe-C alloy strip with an initial carbon content of 4.2% as the research object,the effects of different decarburization temperature, strip thickness and decarburization time on the decarburization effect were studied. The results show that for 2 mm Fe-C alloy strips which were decarburized for 60 min at 1 293,1 353,and 1 413 K,the average carbon content were 2.748%,1.870%,and 1.134%,respectively. The Fe-C alloy strips with thicknesses of 1,1.5 and 2 mm were decarburizated at 1 413 K for 60 min,the average carbon contents were 0.32%,0.92% and 1.05% respectively. It has been proved that increasing the decarburization temperature,prolonging the decarburization time and reducing the thickness of the strip all help to improve the decarburization effect.
[1] 闫伯骏,邢奕,路培,等. 钢铁行业烧结烟气多污染物协同净化技术研究进展[J]. 工程科学学报,2018,40(7):767.(YAN B J,XING Y,LU P,et al. A critical review on the research progress of multi-pollutant collaborative control technologies of sintering flue gas in the iron and steel industry[J]. Chinese Journal of Engineering,2018,40(7):767.) [2] 蔡九菊. 钢铁工业的空气消耗与废气排放[J]. 钢铁,2019,54(4):1.(CAI J J.Air consumption and waste gas emission of steel industry[J]. Iron and Steel,2019,54(4):1.) [3] 周茂军, 张代华. 宝钢烧结烟气超低排放技术集成与实践[J]. 钢铁, 2020, 55(2): 144. (ZHOU M J, ZHANG D H. Technology integration and practice of ultra-low emission of sintering flue gas in Baosteel[J]. Iron and Steel, 2020, 55(2): 144.) [4] 王海风,郦秀萍,周继程,等. 钢铁工业节能技术发展现状及趋势[J]. 冶金能源,2018,37(4):3.(WANG H F,LI X P,ZHOU J C,et al. Status and development trend of energy saving technology of Chinese steel industry[J]. Energy for Metallurgical Industry,2018,37(4):3.) [5] 杨全武. 梅钢三烧结节能环保生产实践[J]. 中国冶金,2020,30(5):76.(YANG Q W. Production practice of energy saving and environmental protection in Meishan Steel's No.3 Sintering Plant[J]. China Metallurgy,2020,30(5):76.) [6] 刘宝山,贾凤泳,刘常鹏,等. 浅谈钢铁企业能源构成及节能措施[J]. 冶金能源,2019,38(6):3.(LIU B S,JIA F Y,LIU C P,et al. A brief discussion on the energy structure and energy saving methods in iron and steel industry[J]. Energy for Metallurgical Industry,2019,38(6):3.) [7] 王新东,田京雷,宋程远. 大型钢铁企业绿色制造创新实践与展望[J]. 钢铁,2018,53(2):1.(WANG X D,TIAN J L,SONG C Y. Innovative practice technology and outlook in large iron and steel enterprise green manufacturing[J]. Iron and Steel,2018,53(2):1.) [8] 孙敏敏,宁晓钧,张建良,等. 炼铁系统节能减排技术的现状和发展[J]. 中国冶金,2018,28(3):1.(SUN M M,NING X J,ZHANG J L,et al. Research status and progress of energy saving and emission reduction technology for ironmaking[J]. China Metallurgy,2018,28(3):1.) [9] 洪陆阔,艾立群,程荣,等. 铁碳合金薄带气固反应脱碳工艺[J]. 钢铁研究学报,2016,28(5):36.(HONG L K,AI L Q,CHENG R, et al. Fe-C alloy ribbons gas-solid decarburization process[J]. Journal of Iron and Steel Research,2016,28(5):36.) [10] 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 L K,AI L Q,CHENG R,et al. Experimental of gas-solid decarburization of Fe-C alloy ribbon[J]. Iron and Steel,2016,51(3):27.) [11] HONG L K,CHENG R,AI L Q,et al. Mechanism of carbon diffusion in the iron sheet during gas-solid decarburization[J]. Transactions of the India Institute of Metals,2019,72(2):335. [12] Park J O,Long T V,Sasaki Y. Feasibility of solid-state steelmaking from cast iron-decarburization of rapidly solidified cast iron[J]. ISIJ International,2012,52(1):26. [13] Lee W H,Park J O,Lee J S,et al. Solid state steelmaking by decarburization of rapidly solidified high carbon iron sheet[J]. Ironmaking and Steelmaking,2012,39(7):530. [14] McDonald C. Solid state steelmaking:process technical and economic viability[J]. Ironmaking and Steelmaking,2012,39(7):487. [15] 程荣,艾立群,洪陆阔,等. 2 mm铁碳合金薄带固态脱碳试验[J]. 钢铁,2016,51(7):28.(CHENG R,AI L Q,HONG L K,et al. Experiment of solid state decarburization process of 2 mm Fe-C alloy sheet[J]. Iron and Steel,2016,51(7):28.) [16] 张凯,陈银莉,孙彦辉,等. 加热过程中H2O(g)对55SiCr弹簧钢脱碳的影响[J]. 金属学报,2018,54(10):1350.(ZHANG K,CHEN Y L,SUN Y H,et al. Effect of H2O(g) of 55SiCr spring steel during the heating process[J]. Acta Metallurgica Sinica,2018,54(10):1350.) [17] JING Y A,YUAN Y M,YAN X L,et al. Decarburization mechanism during hydrogen reduction descaling of hot-rolled strip steel[J]. International Journal of Hydrogen Energy,2017,42(15):10611. [18] Ebrahim S S,Mostafa M,Jalil A K,et al. A new approach in solid state steelmaking from thin cast iron sheets through decarburization in CaCO3 pack[J]. ISIJ International,2018,58(10):1791. [19] GUO L N,CHEN J,ZHANG M,et al. Decarburization thermodynamics of high-carbon ferromanganese powders during gas-solid fluidization process[J]. Journal of Iron and Steel Research,International,2012,19(5):1. [20] GUO L N,CHEN J,SHI W L,et al. Solid-Phase decarburization of high-carbon ferromanganese powders by microwave heating[J]. Journal of Iron and Steel Research,International,2013,20(8):34. [21] LUO H W,XIANG R,CHEN L F,et al. Modeling the decarburization kinetics in grain-oriented silicon Steels[J]. Chinese Science Bulletin,2014,59(15):866. [22] ZHENG W S,LU X G,HE Y L,et al. Thermodynamic modeling of Fe-C-Mn-Si alloy[J]. Journal of Iron and Steel Research,International,2017,24(2):190. [23] LIN J,LUO X N,ZHONG X Y,et al. Dislocation pipe diffusion of Mn during annealing of 5Mn steel[J]. Journal of Iron and Steel Research,International,2016,23(12):1277. [24] 赵宪明,张坤,杨洋. 42CrMo钢表面脱碳行为研究[J]. 钢铁研究学报,2019,31(2):196.(ZHAO X M,ZHANG K,YANG Y. Investigation of surface decarburization behavior in 42CrMo steel[J]. Journal of Iron and Steel Research,2019,31(2):196.)