翼缘厚度80~120 mm重型热轧H型钢翼缘变形渗透研究

针对翼缘厚度80~120 mm重型热轧H型钢的开发,采用有限元模拟技术,对其变形过程进行了分析,研究了翼缘变形渗透情况。结果表明,翼缘厚度80~120 mm重型热轧H型钢变形后,距其翼缘内侧30%t_i处存在最小等效塑性应变区,即该部位变形渗透效果最差;成品翼缘厚大于100 mm时,翼缘心部与翼缘外侧总等效塑性应变均值之差约为0.10,变形渗透程度不良,在成品道次开轧前,将翼缘表面温度降至900 ℃左右,其变形渗透程度得到显著改善;成品翼缘厚小于100 mm时,随着中间坯翼缘厚度由95 mm减小至80 mm,其变形渗透良好,变形更加均匀。

Study on flange deformation permeability of 80-120 mm flange thickness heavy hot rolled H-beam

To develop 80-120 mm flange thickness heavy hot rolled H-beam,the finite element simulation technology was used to analyze its deformation process, and the deformation permeability of the flange was studied. The results show that after deformation of 80-120 mm flange thickness heavy hot-rolled H-beam, there is a minimum equivalent plastic strain zone at 30%t_i from the inside of the flange, this area has the worst deformation permeability.When the finished product flange thickness is greater than 100 mm, the difference of total equivalent plastic strain average value between flange core and outside is about 0.10, the deformation permeability is insufficient.When the temperature of the flange surface is reduced to about 900 ℃ before rolling, the degree of deformation permeability can be significantly improved. When the finished product flange thickness is less than 100 mm, with the thickness of the flange is reduced from 95 mm to 80 mm, the deformation permeability is better, and the deformation is more uniform.