Transactions of Materials and Heat Treatment

Title：Numerical simulation of corner in advance detonating forming for crystallizer square tube

Authors： WANG Hai-tao LI Xiao-jie YAN Hong-hao LIU Zhi-yuan

Unit： Dalian University of Technology

KeyWords： crystallizer explosive forming in advance detonating fatigue life

ClassificationCode：TG392

year,vol(issue):pagenumber：2013,38(5):74-78

Abstract：

In order to solve the apophysis which is shaped for the reason that the corner of copper tube is squeezed by straight flange and not fitting close for the corner forming of copper tube lagging the straight flange fitting when explosive forming process of square continuous casting crystallizer copper tube is done under water, a new method of explosive forming underwater with the explosive of corner in advance detonating was presented and different detonating designs were analyzed by finite element simulation method. The results show that the corner apophysis of crystallizer square copper tube can be eliminated when the explosive of corner is detonated 10，15 and 20μs earlier, which is consistent with the results of the actual experiment whose explosive in the corner is detonated 20μs earlier. Meanwhile, the impact of mould corner under the action of explosive load can be significantly reduced, which is beneficial to improve the service life, and help lower down the cost in the actual production. Based on fatigue life prediction theory, the scheme of detonating 10μs earlier has the best effect, whose fatigue life is 19 times as long as synchronous-detonating method. The proposed method of explosive forming underwater with the explosive of corner in advance blasting provides a new processing technology for square continuous casting crystallizer copper tube.

Funds：

国家自然科学基金资助项目（10972051,11272081）；工业装备结构分析国家重点实验室自主研究课题（S12107）

王海涛（1983-），男，博士研究生

Reference：

［1］蔡开科. 连铸结晶器[M]. 北京：冶金工业出版社，2008.Cai K K. Crystallizer for Continuous Casting[M]. Beijing: Metallurgical Industry Press, 2008.
［2］Mu S G, Guo F A, Tang Y Q, et al. Study on microstructure and properties of aged Cu-Cr-Zr-Mg-RE alloy[J]. Materials Science and Engineering: A,2008，475（1-2）： 235-240.
［3］郭顺兴, 阎建设.连铸钢坯用结晶器铜管及其生产技术[J].有色金属加工，2002，31（6）：17-21.Guo S X, Yan J S. Crystallizer copper tube for billet continuous casting and its processing technology[J]. Nonferrous Metals Processing, 2002，31(6)： 17-21.
［4］杨振声.爆炸加工基本知识[J]. 爆炸与冲击,1983，3(4)：81.Yang Z S. Elementary knowledge of explosive working[J]. Explosion and Shock Waves, 1983, 3(4)：81.
［5］Moshksar M M, Borji S. End effect in the explosive forming of tubes[J]. Journal of Materials Processing Technology, 1994, 42： 431.
［6］张凯. 连铸结晶器的爆炸成型方法. 中国：CN96115061.0[P].1996-11-13. Zhang K. Explosive forming method of continuous casting crystallizer. China,CN96115061.0[P].1996-11-13.
［7］张凯. 方形连铸结晶器方形坯料的制造方法. 中国：CN96119462.6[P]. 1997-08-20.Zhang K. Manufacturing method of square blank of square continuous casting crystallizer. China,CN96119462.6[P]. 1997-08-20.
［8］四川省冶金机械厂.结晶器的爆炸成型方法. 中国：CN97107655.3[P].1998-03-18.Sichuan Province Metallurgical Machinery Factory. Explosive forming method of crystallizer. China,CN97107655.3[P].1998-03-18.
［9］丁彦军, 佟铮, 史兴隆. 方管结晶器爆炸成形过程数值模拟[J].锻压技术,2011,36（2）：43-47.Ding Y J, Tong Z, Shi X L. Numerical simulation of explosive forming process for square tube crystallizer[J]. Forging & Stamping Technology, 2011, 36(2)：43-47.
［10］刘钢, 苑世剑, 滕步刚.内高压成形矩形断面圆角应力分析[J].机械工程学报,2006,42（6）：150-155.Liu G, Yuan S J, Teng B G. Stress analysis on corner of rectangular section in tube hydroforming[J]. Chinese Journal of Mechanical Engineering,2006,42(6)：150-155.
［11］Abbasnia R,Hosseinpour F, Rostamian M, et al.Effect of corner radius on stress-strain behavior of FRP confined prisms under axial cyclic compression[J]. Engineering Structures, 2012, 40：529-535.
［12］金英玉, 杨兆华. 弹塑性力学[M]. 北京：地质出版社,2010.Jin Y Y, Yang Z H. Elastic-Plastic Mechanics[M]. Beijing: Geological Publishing House, 2010.
［13］姚卫星. 结构疲劳寿命分析[M]. 北京：国防工业出版社,2003.Yao W X. Fatigue Life Prediction of Structures[M]. Beijing: National Defence Industry Press, 2003.

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