大方坯结晶器圆角半径大小对铸坯角部热-机械状态影响

特殊钢 ›› 2011, Vol. 32 ›› Issue (6): 15-18.

大方坯结晶器圆角半径大小对铸坯角部热-机械状态影响

李景曾智张家泉

北京科技大学生态与循环冶金教育部重点实验室，北京100083

收稿日期:2011-06-01 出版日期:2011-12-01 发布日期:2022-10-17
作者简介:李景( 1986-),女，硕士,2007年北京科技大学毕业，冶金工程设计。

Effect of Mold Corner Radius for Bloom Casting on Thermo-Mechanical Behavior of Local Shell

Li Jing, Zeng Zhi and Zhang Jiaquan

Key Laboratory of Ecological and Recycle Metallurgy of Ministry of Education, University of Science and Technology, Beijing 100083

Received:2011-06-01 Published:2011-12-01 Online:2022-10-17

摘要/Abstract

摘要： 通过采用Marc软件建立包括结晶器与大方坯凝固坯壳之间动态热交换的热-力耦合模型,分析了结晶器圆角大小对铸坯和结晶器热-力学状态温度、应力和应变分布的影响。结果表明,对于280 mm×380 mm断面铸坯,结晶器圆角半径应选17.5～20 mm为宜,结晶器圆角半径过小,铸坯偏离角部10～20 mm区域表面温度波动较大,不利于坯壳均匀生长;结晶器角部半径过大,结晶器与坯壳之间在角部摩擦严重,易导致坯壳龟裂。

Abstract: A coupled thermal-mechanical model including dynamic heat exchange between mold and bloom solidified shell is established by using Marc software, and the effect of radius of mold comer on thermo-mechanical behavior of bloom local shell and mold including temperature, stress and strain distribution has been analyzed. Results show that for bloom with cross section 280 mm x 380 mm the available radius of mold comer is 17. 5 ~ 20 mm, as the radius of mold corner is lower than that value the temperature gradient in local zone with 10 ~ 20 mm distance from bloom corner is larger that is unfavorable to homogeneously develop bloom shell； as the radius of mold corner is larger than that value, the greater contact normal force between mold and bloom shell leads to starlike cracks on strand.

李景, 曾智, 张家泉. 大方坯结晶器圆角半径大小对铸坯角部热-机械状态影响[J]. 特殊钢, 2011, 32(6): 15-18.

Li Jing, Zeng Zhi , Zhang Jiaquan. Effect of Mold Corner Radius for Bloom Casting on Thermo-Mechanical Behavior of Local Shell[J]. Special Steel, 2011, 32(6): 15-18.