不同钛含量的钢与Al2O3和MgAl2O4界面润湿行为

doi:10.13228/j.boyuan.issn0449-749x.20220356

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (7308 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要高温下钢液中会生成大量的非金属夹杂物,对钢的浇铸工艺和钢产品性能产生不利影响。通过研究高钛钢与夹杂物的界面润湿行为,以期为高钛钢成分设计以及夹杂物的控制研究提供理论依据。以不同钛含量的钢样品以及Al₂O₃和MgAl₂O₄为研究对象,采用改进后的座滴法进行高温润湿试验得到表观接触角;通过电子探针对样品界面的微观形貌和元素进行表征,并结合热力学计算对钢与夹杂物的界面润湿行为进行解释。当钢中钛质量分数分别为0.01%、0.31%和0.68 %时,Al₂O₃/钢润湿系统的表观接触角分别为96°、90°和112°,润湿后的样品界面均匀,无新反应相的存在和明显的元素富集。MgAl₂O₄/钢润湿系统的表观接触角分别为113°、106°和130°;低钛含量(w(Ti)=0.01%)时,界面无反应相生成,高钛含量时,界面存在不连续的反应层,为MgS、MgO、Ti₄S₂C₂和MgAl₂O₄的混合物。研究表明,钛含量增多会导致钢液表面张力降低,界面接触角减小,但当钢中钛质量分数达到0.68 %时,钢中夹带的大量TiN颗粒会使熔融钢液黏度增大,钢液滴在基片上的铺展受阻,其影响远大于表面张力的降低。因此,随着钢中钛含量的提高,两种系统的表观接触均呈现先减小后增大的趋势。高温下的熔融钢液是一个非常复杂的混合物体系,目前,针对钢样和夹杂物的润湿体系,主要通过接触角、界面微观形貌以及是否有新的产物生成来评价。因此,在后续的研究中,针对高钛钢与夹杂物基片界面润湿体系的评价方法还有待进一步探究与完善。

	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
	RSS
	作者相关文章
	邓雅岑
	赵立
	王强强
	张旭彬
	何生平

关键词 ：高钛钢, 润湿, 接触角, Al₂O₃, MgAl₂O₄

Abstract：Non-metallic inclusions will be formed in molten steel at high temperature, which will adversely affect the casting process of steel and the properties of steel products. In order to to provide some theoretical and experimental basis for the design, preparation and application of high titanium steel by studying the interfacial wetting behavior between high titanium steel and inclusions. Three kinds of steel samples with different titanium content and typical inclusions (Al₂O₃ and MgAl₂O₄) were taken as research objects, and the high-temperature wetting experiments were carried out by a modified sessile drop method, and the apparent contact angles between solidified steel samples and inclusion substrates were obtained. After the experiments, the interface morphology and elements of the samples were characterized by electron probe microanalyzer, and the interface wetting behavior between steels and inclusions was explained by thermodynamic calculation. The main results are as follows. When the mass percent of titanium in steel was 0.01%, 0.31% and 0.68% respectively, for the Al₂O₃/steel wetting system, the apparent contact angles were 96°, 90° and 112°, respectively, and the interface between solidified steels and substrates was uniform with no new reaction phase and obvious element enrichment were found. For MgAl₂O₄/steel wetting system, the apparent contact angles were 113°, 106° and 130°, respectively, and no reaction phase was found at the interface between steel with low titanium content(w(Ti)=0.01%), but a discontinuous chemical reaction layer existed at the interface between steels with high titanium content and substrates, which may be a mixture of MgS, MgO, Ti₄S₂C₂ and MgAl₂O₄. Research showed that the decrease of the apparent contact angle was due to the decrease of the surface tension of molten steel caused by the addition of titanium content. However, when the titanium content in steel reached 0.68%, many TiN particles entrained in the steel leaded to the increase the viscosity of molten steel and then hindered its spreading. The effect of viscosity on the apparent contact angle was much greater than that of surface tension. Therefore, the apparent contact angles of both systems decreased and then increased obviously with the increase of titanium content. Molten steel at high temperature is a very complex mixture system. At present, the wettability between steel and inclusions is mainly evaluated by contact angle, interface morphology and chemical reaction. Therefore, the evaluation method of interface wetting system between high-Ti steel and inclusions needs to be further explored and improved in the future research.

Key words： high-Ti steel wettability contact angle Al₂O₃ MgAl₂O₄

收稿日期: 2022-05-19

引用本文:

邓雅岑, 赵立, 王强强, 张旭彬, 何生平. 不同钛含量的钢与Al₂O₃和MgAl₂O₄界面润湿行为[J]. 钢铁, 2023, 58(1): 55-66. DENG Ya-cen, ZHAO Li, WANG Qiang-qiang, ZHANG Xu-bin, HE Sheng-ping. Interface wettability between steel with various contents of titanium and Al₂O₃ and MgAl₂O₄[J]. Iron and Steel, 2023, 58(1): 55-66.

链接本文:

http://www.chinamet.cn/Jweb_gt/CN/10.13228/j.boyuan.issn0449-749x.20220356 或 http://www.chinamet.cn/Jweb_gt/CN/Y2023/V58/I1/55

[1] 程礼梅, 张立峰, 沈平. 钢铁冶金过程中的界面润湿性的基础[J]. 工程科学学报, 2018, 40(12): 1434.(CHENG Li-mei,ZHANG Li-feng,SHEN Pin. Fundamentals of interfacial wettability in ironmaking and steelmaking[J]. Chinese Journal of Engineering, 2018, 40(12): 1434.)
[2] 黄日康, 张立峰, 姜仁波, 等. 超低碳铝脱氧钢中FeO_x对水口结瘤的影响[J]. 钢铁, 2021, 56(1): 43.(HUANG Ri-kang, ZHANG Li-feng, JIANG Ren-bo, et al. Effect of FeO_x in an ultra-low carbon Al-killed steel on nozzle clogging[J]. Iron and Steel, 2021, 56(1): 43.)
[3] 何宇明, 何生平. 结晶器保护渣的润滑与传热控制功能剖析[J]. 连铸, 2021(2): 2.(HE Yu-ming, HE Sheng-ping. Analysis of lubrication and heat transfer function of mold flux[J]. Continuous Casting, 2021(2):2.)
[4] 任英, 李鑫哲, 袁天祥, 等. 热轧卷板表面夹渣缺陷来源分析及控制现状[J]. 钢铁, 2022, 57(1): 13.(REN Ying, LI Xin-zhe, YUAN Tian-xiang, et al. Source analysis and control status of slag defects on the surface of hot-rolled coil[J]. Iron and Steel, 2022, 57(1): 13.)
[5] LUO X C, WANG W L, MA F J. Degree of undercooling and wettability behavior of liquid steel on single-crystal Al₂O₃ and MgO substrate under controlled oxygen partial pressure[J]. ISIJ International, 2016, 56(8): 1333.
[6] GAO E, ZOU G, WANG W,et al. Undercooling and wettability behavior of interstitial-free steel on TiN, Al₂O₃ and MgAl₂O₄ under controlled oxygen partial pressure[J]. Metallurgical and Materials Transactions B, 2017, 48(2): 1014.
[7] 李京社, 杨树峰, 朱立光,等. 钢中镁铝尖晶石夹杂物研究进展[J]. 河南冶金, 2009, 17(5): 1.(LI Jing-she, YANG Shu-feng, ZHU Li-guang, et al. Research and development of MgAl₂O₄ spinel inclusion in steel[J]. Henan Metallurgy, 2009, 17(5): 1.)
[8] JIANG M, WANG X H, CHEN B. Formation of MgO·Al₂O₃ inclusions in high strength alloyed structural steel refined by CaO-SiO₂-Al₂O₃-MgO slag[J]. ISIJ International, 2008, 48(7): 885.
[9] Fukami N, Wakamatsu R, Shinozaki N, at al. Wettability between porous MgAl₂O₄ substrates and molten iron[J]. Journal of the Japan Institute of Metals, 2010, 74(10): 650.
[10] 孙新军, 刘罗锦, 梁小凯, 等. 高钛耐磨钢TiC析出行为及其对耐磨粒磨损性能的影响[J]. 金属学报, 2020, 56(4): 661.(SUN Xin-jun, LIU Luo-jin, LIANG Xiao-kai, et al. TiC precipitation behavior and its effect on abrasion resistance of high titanium wear-resistant steel[J]. Acta Metallurgica Sinica, 2020, 56(4): 661.)
[11] 王杏娟, 靳贺斌, 朱立光,等. 钢中钛含量对连铸结晶器内渣金反应的影响[J]. 钢铁, 2020, 55(12): 46.(WANG Xing-juan, JIN He-bin, ZHU Li-guang, et al. Effect of titanium content in steel on slag-metal reaction in continuous casting mold[J]. Iron and Steel, 2020, 55(12): 46.)
[12] 靳贺斌, 吉俊德, 王时松, 等. 钢渣反应对高钛钢保护渣物化特性的影响[J]. 连铸, 2021(6): 59.(JIN He-bin, JI Jun-de, WANG Shi-song, et al. Effect of steel-slag reaction on physicochemical properties of mold fluxes of high-titanium steel[J]. Continuous Casting, 2021, 6: 59.)
[13] 梁小凯, 孙新军, 雍岐龙, 等. 高钛钢中TiC析出机制[J]. 钢铁研究学报, 2016, 28(9): 71.(LIANG Xiao-kai, SUN Xin-jun, YONG Qi-long, et al. Precipitation of TiC in high Ti steel[J]. Journal of Iron and Steel Research, 2016, 28(9): 71.)
[14] Ogino K, Nogi K, Yamase O. Effects of selenium and tellurium on the surface tension of molten iron and the wettability of alumina by molten iron[J]. Transactions of the Iron and Steel Institute of Japan, 1983, 23(3): 234.
[15] Ogino K, Suetaki T, Niioka K, et al. Effect of alloying elements on interfacial tension between molten steel and slag: Fundamental study on interfacial phenomena in iron and steel-making processes IV[J]. Tetsu-to-Hagane, 1967, 53(7):769.
[16] ZHANG Li-feng, CHENG Li-mei, REN Ying, et al. Effect of cerium on the wettability between 304 stainless steel and MgO-Al₂O₃-based lining refractory[J]. Ceramics International, 2020, 46(10):15674.
[17] ZHANG Shao-da, YUAN Hua-zhi, GAN Mei-juan, et al. Wetting and erosion of ZrO₂-graphite refractory by CaO-SiO₂ and CaO-Al₂O₃-based mold slags for submerged entry nozzle[J]. Metallurgical and Materials Transactions B, 2019, 50(3): 1407.
[18] Shibata H, Watanabe Y, Nakajima K. Degree of undercooling and contact angle of pure iron at 1 933 K on single-crystal Al₂O₃, MgO, and MgAl₂O₄ under argon atmosphere with controlled oxygen partial pressure[J]. ISIJ International, 2009, 49(7): 985.
[19] Joonho Lee, Akihito Kiyose, Masayuki Tanaka, et al. Surface tension of liquid Fe-Ti alloys at 1 823 K[J]. ISIJ International, 2006, 46(4): 467.