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 ›› 2007, Vol. 28 ›› Issue (1): 24-25.

• 试验研究 • 上一篇    下一篇

CSP流程生产Q345B钢带的机械性能和强化因素分析

张云祥1, 赵嘉蓉1,  张海鸥2,  王桂兰2   

  1. 1武汉科技大学材料与冶金学院,武汉430081;
    2华中科技大学材料学院,武汉430074
  • 收稿日期:2006-07-06 出版日期:2007-01-01 发布日期:2023-01-13
  • 作者简介:张云祥(1970-),男,讲师,武汉科技大学毕业,材料成型与控制工程。

An Analysis on Strengthening Factors and Mechanical Properties of Q345B Steel Strip Produced by CSP Process

Zhang  Yunxiang1,   Zhao  Jiarong1,   Zhang  Haiou2,  Wang  Guilan2   

  1. 1 College of Materials Science and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081;
    2 School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074
  • Received:2006-07-06 Published:2007-01-01 Online:2023-01-13

摘要: 通过定量金相和产品力学性能统计分析了CSP工艺(71 mm铸坯)和常规工艺(250 mm铸坯)生产的 Q345B钢2.0~12.7mm板卷组织和晶粒特征、屈强比(YS-UTS)和延伸率。结果表明,CSP工艺生产的板卷的晶粒 尺寸为7.03~8.78 μm,晶粒度级别11.5~12.0,平均屈强比为0.77,延伸率为27.8%,较常规工艺生产的板卷高 (分别为8.79~8.95 μm,10.0~10.5,0.72和25.0%)。计算结果表明,CSP热轧低碳钢板卷细晶强化和沉淀强化占59%,常规工艺该项占55%。

关键词: CSP工艺, Q345B钢带, 组织, 力学性能

Abstract: The characteristics of structure and grain, yield strength -ultimate tensile strength(YS-UTS)xatio,and c longation of 2.0~12.7 mm steel Q345B strip produced by CSP process(71 mm cast slab)and conventional process(250 mm cast slab)have been analyzed by quantimet and statistic of product mechanical properties.The results indicated that the grain size of strip produced by CSP process was7.03~8.78 μm,grain size rating 11.5~12.0,average YS-UTS ratio 0.77 and elongation 27.8% which were higher than that by conventional process(respectively8.79~8.95 μm,10.0~ 10.5,0.72 and 25.0%).Calculated results show that the contributions of fine grain strengthening and precipitation strengthening of low carbon steel strip produced by CSP process make up 59% of all strengthening factors,while that by conventional process make up 55% of all factors.

Key words: CSP Process, Q345B Steel Strip, Structure, Mechanical Properties