摘要
连铸板坯宽面鼓肚对铸坯中心偏析和裂纹有较大影响,为计算板坯宽面鼓肚,按蠕变规律,需解一个三阶微分方程,按弹塑性规律,需解一个二阶微分方程,十分费时。本文提出“单位鼓肚”的概念,并制作了“单位鼓肚”图,可方便求得任意钢种用该图和一组代数的方程蠕变鼓肚或弹塑性鼓肚及鼓肚应变,从而免除了直接求解三阶或二阶微分方程的麻烦。其计算结果与W?nnenberg的实验结果一致,与Gruner等有限元法计算结果也基本一致。鼓肚的计算精度一般不大于5％(m<4)和10％(m>4)。
In order to compute bulging of wide face of continuous cast slab, it is necessary to solve a third order differental equation for creep or a second order one for elastoplastic deformation. It is a time-consuming work. In present papper, the mathematic models to compute bulging are given. It is easy to determine bulging and strains of solidifying shell. To colve the third or second order differencal equation is unnecessary. The calculation with the models is consistent with the experimetal results of Wunnenberg and with the calculation of Graner using the finite element method.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
1992年第4期35-41,共7页
Journal of Iron and Steel Research
关键词
膨肚
连铸板坯
蠕变
数字模型
bulging, continuous cast slab, creep, elastoplastic defor- mat ion, mathematic models
