ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2012, Vol. 33 ›› Issue (2): 33-36.

• 工艺技术 • 上一篇    下一篇

Q345B低温变形抗力模型及在矫直工艺中的应用

王振国1,任勇1,程晓茹1,詹胜利2,黄大军2   

  1. 1.武汉科技大学材料科学与冶金工程学院,武汉 430081;
    2.武汉钢铁股份有限公司,武汉 430083 ;
  • 收稿日期:2011-09-25 出版日期:2012-04-01 发布日期:2022-10-14
  • 作者简介:王振国(1987-),男,硕士研究生,2008年湖南工程学院毕业,轧制过程冶金学和轧材产品开发

Math Model for Deformation Resistance of Steel Q345B at Low Temperature and Its Application in Straightening Process

Wang Zhenguo1  , Ren Yong1 , Cheng Xiaoru1 , Zhan Shengli2 , Huang Dajun2   

  1. 1. College of Materials Science and Metallurgical Engineering, Wuhan University of Science and Technology, Wuhan 430081 ;
    2. Wuhan Iron and Steel Corp Ltd, Wuhan 430083 ;
  • Received:2011-09-25 Published:2012-04-01 Online:2022-10-14

摘要: 通过Gleeble-1500热模拟试验机对低合金钢Q345B φ10 mm × 30 mm圆件体试样在450~650℃以0.001~0.1s-1变形速率进行真应变为0.15拉伸试验。结果表明,低温低变形速率状态下的变形抗力处于弹塑性变形区,线性段较长,当变形量大于0.06以后出现较明显塑性变形,变形抗力的变化规律与较高温状态基本类似。通过采集实验数据,应用Origin软件通过多元非线性回归建立了Q345B钢变形抗力的数学模型。应用该模型结合矫直理论公式计算了中厚板9辊矫直机矫直力,计算结果的相对误差为0.01%~6.71%。

关键词: 热模拟, 低温变形抗力, 数学模型, 矫直力

Abstract: The hot tensile test of Φ10 mm x 30 mm cylinder specimen of low alloy steel Q345B with true strain 0.15 and strain rate 0.001-0.1 s-1 at 450-650 ℃ has been carried out by Gleeble-1500 thermal test machine. Results show that with low strain rate at lower temperature the deformation resistance is at elastic-piastic deformation stage and its linear section is longer, and as deformation is larger than 0. 06, the apparent plastic deformation of steel occurs and the change rule of deformation resistance is basically similar to that at higher temperature. Based on test data the math model for deformation resistance of steel Q345B is established by using Origin software with multivariate nonlinear regression. The straightening force of 9 rolls straightener for medium and heavy plate is calculated by using this model combined with straightening theoretical equation, the relative error of calculated results are 0.01%-6.17% .

Key words: Hot Simulation, Low Temperature Deformation Resistance, Math Model, Straightening Force