Abstract：Hot rolled enamel steels are required to have sufficient fish-scale resistance. Improving the hydrogen storage property, that is,increasing the hydrogen trap, the most effective method is to increase the content of precipitated phase in the steel. In this paper, in order to quantitatively analyze the precipitates of hot-rolled enamel steels with different aging treatments, the precipitates are separated from the matrix by electrolysis extraction method. The morphology and structure of the precipitates after extraction are characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Rietveld full spectrum fitting method is used to calculate the composition and content of different precipitates. The nano-scale precipitates are characterized by transmission electron microscopy (TEM) and three dimensional atomic probe (3DAP). Finally, the relationship between precipitate phase and hydrogen storage property in hot rolled enamel steel is discussed. The XRD results show that the main kinds of precipitate in hot-rolled enamel steel are Ti2CS, TiC0.95 and TiC0.3N0.7. TEM results show that the precipitates with diameter above 150 nm contain sulfur, which are carbon sulfide titanium. Precipitates with diameter about 100 nm are titanium carbide, and a large amount of precipitation with diameter about 10 nm, with disordered distribution, which are confirmed as titanium carbide by 3DAP. The sample treated at 850 ℃ has the highest precipitation content, reaching 0.39%, and the specific surface area of the particles is also the largest.The hydrogen penetration experiment shows that it has the longest average penetration time and higher hydrogen storage performance.
缪乐德, 张毅, 王双成. 不同热处理热轧搪瓷钢含钛析出相的定性定量分析[J]. 冶金分析, 2024, 44(3): 1-7.
MIAO Lede, ZHANG Yi, WANG Shuangcheng. Qualitative and quantitative analysis of titanium precipitate phases in hot rolled enamel steel with different isothermal situation. , 2024, 44(3): 1-7.
[1] Okuyamas T,Nishimoto A,Kurokawa T.New type cold rolled steel sheet for enameling produced by the continuous casting method[J].Viterous Enameller,1990,41(3):49-60. [2] 刘欣,刘友荣.搪烧对热轧酸洗搪瓷钢抗鳞爆性能影响的研究[J].河南冶金,2016,24(4):12-14. LIU Xin,LIU Yourong.Study of fishscalling resistance of the hot rolled and picked enamel steel in enameling buring[J].Henan Metallurgy,2016,24(4):12-14. [3] Papp G,Geyer D,Giedenbacher G.Continuously cast steel sheet for enamelling and technical properties of hot and cold rolled sheet[J].Hterous Enamelier,1990,41(4):71-81. [4] Choo W Y, Lee J Y.Thermal analysis of trapped hydrogen in pure iron[J].Metal. Trans. A,1982,13(1):135-140. [5] Nagumo M,Nakamura M,Takai K.Hydrogen thermal desorption relevant to delayed-fracture susceptibility of high-strength steels[J].Metal. Mater Trans. A,2001,32(2):339-347. [6] 封治民,傅玉兰,赵克清.搪瓷用钢鳞爆的研究[J].金属学报,1986,22(4):B189-B191. FENG Zhimin,FU Yulan,ZHAO Keqing.Remedy for fishscale on enamel steel sheet[J].Acta Metallurgica Sinica,1986,22(4):B189-B191. [7] Valentini R,Solina A,Matcra S,et al.Influence of titanium and carbon contents on the hydrogen trapping of microalloyed steels[J].Metal.Mater.Trans.A,1996,27(12):3773-3780. [8] Otsuka T,Tanabe T.Hydrogen diffusion and trapping process around MnS precipitates in αFe examined by tritium autoradiography[J].J.Alloy.Compd.,2007,446-447:655-659. [9] 孙全社,王先进.稀土、钛和铌对冷轧超低碳搪瓷钢板成形性能的影响[J].钢铁研究学报,2004,16(3):49-54. SUN Quanshe,WANG Xianjin.Effect of RE,Ti and Nb on recrystallization and formability of ULC cold-rolled enamel sheets[J].Journal of Iron and Steel Research,2004,16(3):49-54. [10] 孙全社,金蕾.静电搪瓷用高强度热轧薄钢板的性能[J].钢铁研究学报,2007,19(4):47-50. SUN Quanshe,JIN Lei.Property of high strength hot rolled sheet steel for electrostatic enameling[J].Journal of Iron and Steel Research,2007,19(4):47-50. [11] Dong F T,Du L X,Liu X H,et al.Optimization of chemical compositions in low-carbon Al-killed enamel steel produced by ultra-fast continuous annealing[J].Mater.Charact.,2013,84:81-87. [12] 徐春,李晓杰.钛对冷轧超低碳搪瓷钢鳞爆性的影响[J].热处理,2011,26(3):16-21. XU Chun,LI Xiaojie.Effect of titanium on fish-scaling behavior of cold-rolled and enameled ultra-low-carbon steel[J].Heat Treatment,2011,26(3):16-21. [13] 李晓杰,孙智,徐春.钒钛微合金搪瓷钢中析出相和贮氢性能的研究[J].热处理,2013,28(4):32-35. LI Xiaojie,SUN Zhi,XU Chun.Precipitates in enamel sheets containing a trace of vanadium and titanium and their hydrogen storability[J].Heat Treatment,2013,28(4):32-35. [14] Zhang A W,Jiang Z Y,Wei D B,et a1.Analysis of fish scaling resistance of low carbon heavy plate steels[J].J.Iron Steel Res. Int., 2014,21(4):469-475. [15] Dong F T,Du L X,Liu X H,et al.Effect of Ti(C,N) precipitation on the texture evolution and fish-scale resistance of ultra-1ow carbon Ti-bearing enamel steel[J].J. Iron Steel Res. Int.,2013,20(4):39-45. [16] Takahashi J, Kawakami K, Kobayashi Y.Origin of hydrogen trapping site in vanadium carbide precipitation strengthening steel[J].Acta Materialia,2018,153:193-204. [17] Uzun R,Bakaya M,Etin Z,et al.Effect of strain ratio on hydrogen permeability properties of low carbon enamel steel[J].Metallurgical Research & Technology,2021,118(4):412-416. [18] 孙全社,居发亮,蒋伟忠.冷轧超低碳钢的析出相和氢穿透时间研究[J].上海金属,2012,34(1):15-20. SUN Quanshe,JU Faliang,JIANG Weizhong.Study on precipitate and hydrogen permenation time of cold rolled ultra low carbon steels[J].Shanghai Metals,2012,34(1):15-20. [19] Huang X,Zhang Z,Liu X,et al.Variations of microstructure and resistance to fish-scaling of a hot rolled enamel steel before and after enamel firing[J].Journal of Materials Research and Technology,2021(8):466-473.
