ISSN:1003-8620

CN:42-1243/TF

Governed by: CITIC Pacific Special Steel Group Co., LTD

Sponsored by: Daye Special Steel Co., LTD.

Special Steel ›› 2013, Vol. 34 ›› Issue (5): 16-19.

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Numerical Simulation on Optimization of Shrinkage Cavity Defect of Steel SCM822H 3 t Ingot

Yang Wanliang1,2 , Li Jingshe1,2  , Yang Hongbo1,2 , Song Fangfang1,2 , Huang Ting1,2   

  1. 1 School of Metallurgical and Ecological Engineering; 2 State Key Lab of Advanced Metallurgy, University of Science and Technology, Beijing 100083
  • Received:2013-04-19 Online:2013-10-01 Published:2022-09-19

SCM822H钢3t铸锭缩孔缺陷优化的数值模拟

杨万良1,2,李京社1,2,杨宏博1,2,宋方方1,2,黄婷1,2   

  1. 北京科技大学 1冶金与生态工程学院;2冶金国家重点实验室,北京 100083
  • 作者简介:杨万良(1972-),男,博士研究生,1995年北京科技大学毕业,钢液凝固过程数值模拟研究。
  • 基金资助:
    国家自然科学基金资助(No. 51074021)

Abstract: Based on the measured value of ingot surface temperature in ingot stripping at situ, with using ProCAST software the calculation model for filling and solidifying process of 3 t ingot (body height 1675 mm, hot top inclined angle 65. 3° , height of liquid surface in hot top 290 mm) of steel SCM822H (/% : 0.20C, 0.80Mn, 0.25Si, 0.013P, 0.006S, 1.14Cr, 0.39Mo, 0.01V, 0.036Al, 0.0002B) has been established. With calculation by the model the relation between hot top inclined angle, ingot body height-width ratio and body cut-off volume ratio caused by shrinkage cavity is gotten to get the optimized ingot parameters i. e. body height-width ratio 1846/630 and hot top inclined angle 90°. According to optimized ingot mould parameters the simulation results show that with using the new ingot mould the ingot body cut-off volume ratio decreases from original 13. 5% to 0, it is available to ensure all the shrinkage cavity is in the hot top.

Key words: Steel SCM822H, 3 t Ingot, Shrinkage Cavity, Filling and Solidifying Process, ProCAST Software, Numerical Simulation

摘要: 在现场脱锭时铸锭表面温度测定值的基础上,利用ProCAST软件建立了SCM822H钢(/%:0.20C、0.80Mn、O.25Si、0.013P、0.006S、1.14Cr、0.39Mo、0.01V、0.036A1、0.000 2B)3 t铸锭(锭身高1 675 mm,冒口倾角65.3°,冒口内液面高290 mm)充型和凝固过程的计算模型。通过该模型计算得出冒口倾角、锭身高宽比与缩孔引起的锭身切除体积比的关系,优化了锭型参数一锭身高宽比为1 864/530,冒口倾角90°。按照优化锭型参数的模拟结果表明,采用新锭型可使锭身切除体积由原先的13.5%降至0,可保证将缩孔缺陷完全控制在冒口内。

关键词: SCM822H钢, 3t铸锭, 缩孔, 充型和凝固过程, ProCAST软件, 数值模拟