Founded in 1987, Bimonthly
Supervisor:Jiangxi University Of Science And Technology
Sponsored by:Jiangxi University Of Science And Technology
Jiangxi Nonferrous Metals Society
ISSN:1674-9669
CN:36-1311/TF
CODEN YJKYA9
ZHANG Li-heng, WANG Guo-cheng, ZHU Qing-de. Thermodynamic analysis formed by non-metallic inclusions in welding gas vessel steel HP295[J]. Nonferrous Metals Science and Engineering, 2011, 2(6): 22-28.
Citation: ZHANG Li-heng, WANG Guo-cheng, ZHU Qing-de. Thermodynamic analysis formed by non-metallic inclusions in welding gas vessel steel HP295[J]. Nonferrous Metals Science and Engineering, 2011, 2(6): 22-28.

Thermodynamic analysis formed by non-metallic inclusions in welding gas vessel steel HP295

More Information
  • Received Date: October 08, 2011
  • Published Date: December 30, 2011
  • The composition of inclusions in the process of steelmaking and solidification is predicted by the thermodynamic calculations for HP235 steel. The morphology and composition of inclusions are analyzed by SEM and EDS. The results show that the inclusions in the molten steel mainly are tridymite (SiO2), spessartine (3MnO· A12O3·3SiO2), mullite (3A12O3·2SiO2) and corundum (A12O3) by using silicon -manganese deoxidization. The composition of inclusions change gradually from tridymite mainly to corundum with the content of [Al] increased, or [O] reduced. Main inclusions is tridymite when [Al] < 1×10-6, and the main is corundum when a[O] < 3×10-3. The composition of inclusions precipitated have relationship with the contents of [Al] and [O] during solidification. At the temperature of 1550℃, the precipitation is tridymite when a[O]>115.6×10-5 and [Al] < 4.5×10-6, the precipitation is mullite when a[O] < 115.6×10-5 and [Al] < 10.5×10-6, and the precipitation is corundum when [Al]>10.5×10-6. At the temperature of 1510℃, the precipitation is tridymite when a[O]>75.2×10-5 and [Al] < 3.51×10-6, the precipitation is mullite when a[O] < 75.2×10-5 and [Al] < 8.18×10-6, the precipitation is corundum when [Al]>8.18×10-6. In addition, when [Ca] exists in the steel, freezing precipitation of calcium may even leave wollastonite plagioclase. The composition and quantity of precipitates have relationship with the activity of the calcium in the steel. The predicted results by thermodynamic calculations are mainly consistent with the results by SEM and EDS. So, the thermodynamic calculation method is suitable for predicting composition of inclusions in the steel.
  • [1]
    韩乃川, 冷祥贵. HP295热轧钢板的开发[J].梅山科技, 2002(4): 39-41.
    [2]
    [3]
    [4]
    [5]
    黄希祜.钢铁冶金原理[M].北京:冶金工业出版社, 1981.
    [6]
    李文超.冶金与材料物理化学[M].北京:冶金工业出版社, 2001.
    [7]
    董履仁, 刘新华.钢中大型非金属夹杂物[M].北京:冶金工业出版社, 1991.
    [8]
    Sigworth G K, Elliott J F. The thermodynamics of liquid dilute iron alloys[J]. Metal Science, 1974, 18:298-316. doi: 10.1179/msc.1974.8.1.298
    [9]
    Hiroki O, Hideaki S. Activities in MnO -SiO2 -A12O3slag and deoxidation equilibria of Mn and Si[J]. Metall and Material Trans, 1996, 27B:263-270.
    [10]
    曲英.炼钢学原理[M].北京:冶金业出版社, 1981: 212、257、221-224.
    [11]
    Hiroki Ohta, Hideaki Suito. Activities in CaO-SiO2-A12O3slag and deoxidation equilibria of Si and Al[J]. Metal and Material Trans, 1996, 27B: 943-953. doi: 10.1007/s11663-996-0008-9
    [12]
    Richard H, Rein, John Chipman. Activities in the liquid solution SiO2-CaO-MgO-A12O3at 1600℃[J]. Trans Metallurgical Society of AIME, 1965, 233(2):415-425.
  • Related Articles

    [1]SU Lijuan, XU Jifang, ZUO Long. Thermodynamic calculation of precipitation behavior of chromium spinel in the CaO-SiO2-MgO-Al2O3-FeO-Cr2O3 slag system[J]. Nonferrous Metals Science and Engineering, 2023, 14(3): 302-310. DOI: 10.13264/j.cnki.ysjskx.2023.03.002
    [2]WANG Jiansong, QIN Jia, JING Tao, HUANG Tao, SHI Xinxin, CAO Zhanmin. Thermodynamic simulation and optimization of lead side blowing oxidation smelting process[J]. Nonferrous Metals Science and Engineering, 2020, 11(5): 7-15. DOI: 10.13264/j.cnki.ysjskx.2020.05.002
    [3]TONG Zhifang, JIA Zhiheng, ZENG Qingpo, XU Congcong. Thermodynamics of the effects of slag compositions on the precipitation of chromium spinel in CaO-MgO-Al2O3-Si2O-Cr2O3-FeO-TiO2 slag system[J]. Nonferrous Metals Science and Engineering, 2020, 11(3): 1-10. DOI: 10.13264/j.cnki.ysjskx.2020.03.001
    [4]XIAO Chao, ZENG Li, LI Yibing, LIU Yezi, WEI Chenggui, HUANG Yongrun. Thermodynamic analysis on removing Cr(III) by phosphate precipitation[J]. Nonferrous Metals Science and Engineering, 2017, 8(5): 103-108. DOI: 10.13264/j.cnki.ysjskx.2017.05.015
    [5]DUAN Shengchao, GUO Hanjie, GUO Jing, LU Hao, SHI Xiao, YANG Wensheng, LIU Shuai, YU Mengxi. Thermodynamic calculating of binary alloy melts based on atom-molecule theory[J]. Nonferrous Metals Science and Engineering, 2017, 8(3): 7-15. DOI: 10.13264/j.cnki.ysjskx.2017.03.002
    [6]YI Jun, CAO Cai-fang. Thermodynamic analysis of cobalt tungstate's hydrometallurgical decomposition[J]. Nonferrous Metals Science and Engineering, 2013, 4(5): 44-47,126. DOI: 10.13264/j.cnki.ysjskx.2013.05.023
    [7]WU Jin-ling, LI Jiang-tao, LIU Xu-heng, CHEN Xing-yu, HE Li-hua. Thermodynamic analysis of powellite selective leaching by soda[J]. Nonferrous Metals Science and Engineering, 2013, 4(5): 33-38. DOI: 10.13264/j.cnki.ysjskx.2013.05.021
    [8]WANG Rui-xiang, ZENG Bin, YU Pan, MAO Ji-yong, XIE Bo-yi, WANG Zhi-gang, RUAN Jian-guo. Thermodynamics study of sodium hydroxide roasting in a poly-metallic gold mine[J]. Nonferrous Metals Science and Engineering, 2013, 4(3): 9-13. DOI: 10.13264/j.cnki.ysjskx.2013.03.013
    [9]CHAI Li-yuan, WANG Hai-tang, YOU Xiang-yu, WANG Qing-wei, SHU Yu-de. Thermodynamics equilibrium of M(Ⅱ)-S-H2O system[J]. Nonferrous Metals Science and Engineering, 2012, 3(5): 8-13. DOI: 10.13264/j.cnki.ysjskx.2012.05.020
    [10]NIE Jin-xia, HEN Yun-ren, CHEN Ming CHEN Ming. Thermodynamics and Kinetics of Copper Sorption by Rice Bran[J]. Nonferrous Metals Science and Engineering, 2008, 22(4): 35-38.

Catalog

    Article Metrics

    Article views (67) PDF downloads (4) Cited by()
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return