0.47C-0.36Si-0.67Mn钢连铸板坯低温轧制过程变形抗力模型  

A Deformation Resistance Model for Casting Slab of 0.47C-0.36Si-0.67Mn Medium Carbon Steel in Low Temperature Rolling Process

作　　者：梁精龙[1,2] 冯运莉[2] 郭晓霞[2] 苍大强[1] 

机构地区：[1]北京科技大学冶金与生态学院,北京100083 [2]河北联合大学冶金与能源学院河北省现代冶金技术重点实验室,唐山063009

出　　处：《特殊钢》2013年第3期8-10,共3页Special Steel

基　　金：国家自然科学基金资助项目(51074062);河北省杰出青年基金资助项目(E2011209029)

摘　　要：用Gleeble-3500热模拟试验机对0.47C-0.36Si-0.67Mn中碳钢150 mm连铸板坯在650～920℃、变形量0.1～0.6、变形速率10～20 s^(-1)单道次轴向压缩时的变形抗力进行试验和研究,并建立了实验钢在低温下的变形抗力数学模型。结果表明,随温度降低,变形速率和变形量增加,试验钢变形抗力增加:在700℃以下变形时,由于发生动态铁素体相变,当加工硬化同动态相变软化达到平衡时曲线出现变形抗力极值,而后随形变诱导铁素体量的增加,变形抗力下降预报值与实测值相符,变形抗力的预报精度为±13.76 MPa。By using Gleeble-3500 thermal mechanical simulator, deformation resistance of 150 mm casting slab of 0. 47C-0. 36Si-0. 67Mn medium carbon steel with strain 0. 1 - 0. 6 and strain rate 10 -20 s- i at 650 -920 ℃ in single pass axial compression process is tested and studied, and a math model for deformation resistance of test steel at lower temperature is established. Results show that with decreasing temperature, increasing strain and strain rate, the deformation resistance of test steel increases ; in deformation at less than 700℃, due to occurrence of dynamic ferrite phase transformation, as work-hardening and dvnamic phase transformation softening are going to balance the maximum value of deformation resistance occurs on curves, later with increasing deformation-induced ferrite amount the deformation resistance decreases. The calculated value conforms to measured value, the error of forecasting deformation resistance value is ± 13.76 MPa.

关 键 词：0 47C-0 36Si-0 67Mn中碳钢 连铸板坯 热模拟 低温轧制 变形抗力 数学模型 

分 类 号：TF777[冶金工程—钢铁冶金]