Investigation of Surface Crack of Nb-V-Ti Micro-Alloyed Steel Plate by 250 mm Casting Slab Hot Charging Process

曹磊; 王国连

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Investigation of Surface Crack of Nb-V-Ti Micro-Alloyed Steel Plate by 250 mm Casting Slab Hot Charging Process

更新时间：2026-01-21

- Investigation of Surface Crack of Nb-V-Ti Micro-Alloyed Steel Plate by 250 mm Casting Slab Hot Charging Process
- Special Steel Vol. 39, Issue 4, Pages: 55-57(2018)
- 作者机构：
  
  秦皇岛首秦金属材料有限公司,秦皇岛,066000
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：10 February 2018，
  
  Online First：01 June 2022，
  
  Published：01 June 2018
- 稿件说明：
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曹磊, 王国连. Investigation of Surface Crack of Nb-V-Ti Micro-Alloyed Steel Plate by 250 mm Casting Slab Hot Charging Process[J]. Special Steel, 2018, 39(4): 55-57.
DOI：

曹磊, 王国连. Investigation of Surface Crack of Nb-V-Ti Micro-Alloyed Steel Plate by 250 mm Casting Slab Hot Charging Process[J]. Special Steel, 2018, 39(4): 55-57. DOI：

摘要

利用金相观察、能谱分析、连铸坯红送与冷送工艺的对比试验等手段，对红送工艺生产微合金钢板出现的表面裂纹进行了分析研究。结果表明

红送工艺生产微合金钢板表面裂纹并不是因为连铸坯本身存在裂纹缺陷，而是由于铸坯在凝固后的冷却过程中，大量细小的C、N化合物在奥氏体晶界析出，降低了晶界强度，导致钢板表面裂纹形成。

Abstract

Surface crack on micro-alloyed steel plate produced by hot charging process was investigated by means of metallographic analysis

energy spectrometer analysis and contrast test of HCR and CCR. The results show that the main factors of surface crack on micro-alloyed steel plate produced by hot charging process are not the cracks on slab but the precipitation of a large of fine carbon and nitrogen compound at the boundary of the austenite grains

which decreases the strength of the grain boundary sharply.

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