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

张云祥; 赵嘉蓉; 张海鸥; 王桂兰

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

更新时间：2026-01-21

- An Analysis on Strengthening Factors and Mechanical Properties of Q345B Steel Strip Produced by CSP Process
- Special Steel Vol. 28, Issue 1, Pages: 24-25(2007)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：06 July 2006，
  
  Online First：13 January 2023，
  
  Published：13 January 2007
- 稿件说明：
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张云祥, 赵嘉蓉, 张海鸥, et al. An Analysis on Strengthening Factors and Mechanical Properties of Q345B Steel Strip Produced by CSP Process[J]. Special Steel, 2007, 28(1): 24-25.
DOI：

张云祥, 赵嘉蓉, 张海鸥, et al. An Analysis on Strengthening Factors and Mechanical Properties of Q345B Steel Strip Produced by CSP Process[J]. Special Steel, 2007, 28(1): 24-25. DOI：

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%。

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.

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