Analysis on Surface Longitudinal Crack of Concasting Slab of Heat Resistant Stainless Steel 310S and Process Improvement

李俊; 李晓红; 范新智; 李国平

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Analysis on Surface Longitudinal Crack of Concasting Slab of Heat Resistant Stainless Steel 310S and Process Improvement

更新时间：2026-01-21

- Analysis on Surface Longitudinal Crack of Concasting Slab of Heat Resistant Stainless Steel 310S and Process Improvement
- Special Steel Vol. 30, Issue 5, Pages: 45-46(2009)
- 作者机构：
  
  太原钢铁(集团)有限公司技术中心,太原,030003
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：25 March 2009，
  
  Online First：18 November 2022，
  
  Published：18 November 2009
- 稿件说明：
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李俊, 李晓红, 范新智, et al. Analysis on Surface Longitudinal Crack of Concasting Slab of Heat Resistant Stainless Steel 310S and Process Improvement[J]. Special Steel, 2009, 30(5): 45-46.
DOI：

李俊, 李晓红, 范新智, et al. Analysis on Surface Longitudinal Crack of Concasting Slab of Heat Resistant Stainless Steel 310S and Process Improvement[J]. Special Steel, 2009, 30(5): 45-46. DOI：

摘要

310S奥氏体耐热不锈钢(%:0.05C、24.5Cr、19.3Ni)导热性差[100℃导热系数0.029×4.18J/(cm·℃)]

200 mm×(950～2 150)mm连铸板坯易产生纵裂纹(宽0.1～10 mm

深1～20 mm)。通过采用熔点1 085℃的保护渣(ST-SP/310)替代熔点1 120℃的保护渣(ST-SP/810)

结晶器宽面和窄面的冷却水流量分别从4 500 L/min和460 L/min降至4 300 L/min和430 L/min

钢水过热度从30～45℃降至20～35℃

拉速从0.95m/min降至0.80～0.90 m/min

铸坯质量明显改善

消除了表面纵裂。

Abstract

As heat conductivity of austenite heat resistant stainless steel 310S (%:0.05C

24.5Cr

19.3Ni)is poor

only 0.029 × 4.18 J/(cm · ℃)at 100℃

the surface longitudinal cracks with wide 0.1～10 mm and depth 1～20 mm of 200 mm ×(950～2150)mm casting slab easy produce.By using mold flux ST-SP/310 with lower melting point-1085 ℃ to replace mold fux ST-SP/810 with higher melting point-1120℃

decreasing broad face and narrow face cooling; water rate respectively to 4300 L/min and 430 L/min from original 4500 L/min and 460 L/min

decreasings liquid superheating extent to 20~35℃ from 30~45℃ and lowering casting speed to 0.80～0.90 m/min from 0.95 m/min

the quality of cast slab obviously improves to avoid the occurrence of surface longitudinal crack.

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