An Analysis on Cause of Formation of 0.20C Steel Φ300 mm Round Casting Bloom Intermediate Cracks and Improved Process Measure

张志宏; 刘江伟; 郑锦峰; 刘伟平; 成国光

您当前的位置：

首页 >

文章列表页 >

An Analysis on Cause of Formation of 0.20C Steel Φ300 mm Round Casting Bloom Intermediate Cracks and Improved Process Measure

更新时间：2026-01-21

- An Analysis on Cause of Formation of 0.20C Steel Φ300 mm Round Casting Bloom Intermediate Cracks and Improved Process Measure
- Special Steel Vol. 33, Issue 2, Pages: 37-39(2012)
- 作者机构：
  
  1. 北京科技大学冶金与生态工程学院,北京,100083
  2. 承德建龙特殊钢有限公司,承德,067201
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：14 October 2011，
  
  Online First：14 October 2022，
  
  Published：14 October 2012
- 稿件说明：
移动端阅览
张志宏, 刘江伟, 郑锦峰, et al. An Analysis on Cause of Formation of 0.20C Steel Φ300 mm Round Casting Bloom Intermediate Cracks and Improved Process Measure[J]. Special Steel, 2012, 33(2): 37-39.
DOI：

张志宏, 刘江伟, 郑锦峰, et al. An Analysis on Cause of Formation of 0.20C Steel Φ300 mm Round Casting Bloom Intermediate Cracks and Improved Process Measure[J]. Special Steel, 2012, 33(2): 37-39. DOI：

摘要

针对20钢φ300mm圆铸坯低倍组织出现中间裂纹的位置和形貌

结合连铸设备和工艺进行分析

得出结晶器内坯壳厚度不均匀

拉矫机矫直压力波动大

铸坯在受到热应力和矫直应力的作用下沿晶界开裂形成中间裂纹。通过改善结晶器软化水和连铸二冷水的质量

钢水过热度由25～35℃降至20～30℃

结晶器电磁搅拌电流由550 A降至350 A

稳定矫直压力

铸坯矫直温度≥950℃

避免了圆铸坯中间裂纹的出现。

Abstract

According to location and morphology of intermediate cracks occurred in macrostructure of 0.20C steel 4>300 mm round casting bloom and combining with analysis on casting equipment and process

it is obtained that with uneven shell thickness formed in mold

larger fluctuation of hydraulic force of withdraw straightening stands on bloom

the intermediate cracks along intergranular boundary form in bloom under action of heat stress and straightening stress. With improving the quality of mold softened water and secondary water for casting

decreasing superheating extent of liquid from 25-35 °C to 20-30 °C

decreasing mold electromagnetic stirring current from 550 A to 350 A

stabling the hydraulic force

and straightening bloom temperature ≥ 950 °C

the intermediate cracks in round casting bloom are eliminated.

关键词

Keywords

references

Views

下载量

CSCD

CNKI被引量

Alert me when the article has been cited

提交

Tools

Publicity Resources

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

Related Author

王振国

任勇

程晓茹

詹胜利

黄大军

Related Institution

武汉科技大学材料科学与冶金工程学院

武汉钢铁股份有限公司

⁰