Application of Carbo-nitride Precipitation Model in Concasting Process of Nb-Bearing Microalloyed Steel for Ship Plate

张小欢; 刘珂; 李阳; 张家泉; 刘学华; 张乔英; 张建平

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Application of Carbo-nitride Precipitation Model in Concasting Process of Nb-Bearing Microalloyed Steel for Ship Plate

更新时间：2026-01-21

- Application of Carbo-nitride Precipitation Model in Concasting Process of Nb-Bearing Microalloyed Steel for Ship Plate
- Special Steel Vol. 32, Issue 3, Pages: 40-43(2011)
- 作者机构：
  
  1. 北京科技大学钢铁冶金系与循环冶金教育部重点实验室,北京,100083
  2. 马鞍山钢铁股份有限公司,马鞍山,243000
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：08 December 2010，
  
  Online First：18 October 2022，
  
  Published：18 October 2011
- 稿件说明：
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张小欢, 刘珂, 李阳, et al. Application of Carbo-nitride Precipitation Model in Concasting Process of Nb-Bearing Microalloyed Steel for Ship Plate[J]. Special Steel, 2011, 32(3): 40-43.
DOI：

张小欢, 刘珂, 李阳, et al. Application of Carbo-nitride Precipitation Model in Concasting Process of Nb-Bearing Microalloyed Steel for Ship Plate[J]. Special Steel, 2011, 32(3): 40-43. DOI：

摘要

针对含铌微合金钢(D36船板钢

%:0.12～0.16C、0.25～0.45Si、1.25～1.45Mn、≤0.020P、≤0.010S、0.015～0.040Als、0.015～0.025Nb、≤0.009 0N)连铸过程裂纹敏感性大的问题

建立了Nb(C

N)和A1N在奥氏体中的析出模型

以分析板坯在850～1150℃矫直时Nb(C

N)和AlN析出对铸坯热塑性的影响。结果表明

含铌微合金钢中碳氮化物的析出方式主要是晶界和位错线形核

在950℃时Nb(C

N)的综合析出速度和AlN在晶界上的析出速度最大。因此

含铌微合金钢的矫直温度应大于950℃。

Abstract

According the trouble of large sensitivity on crack for niobium-bearing microalloying steel (ship plate steel D36

% ： 0. 12 ~0. 16C

0. 25 〜0.45Si

1.25 〜L45Mn

≤0.020P

≤0.010S

0.015 - 0. 040Als

0.015 〜0.025Nb)

≤0.009 0N) during concasting process

the model for precipitation of Nb ( C

N) and AIN in austenite has been established to analyze the effect of Nb (C

N) and AIN precipitates on hot ductility of casting slab during slab straightening at 850 - 1 150 ℃. Results show that the main precipitating model of carbo-nitrides in niobium-bearing microalloying steel mainly is nucleating at grain boundary and dislocation line

and at 950 °C the comprehensive precipitating speed of Nb (C

N) and the precipitating speed of AIN at grain boundary are maximum

therefore strengthening temperature of niobium- bearing steel should be more than 950 ℃.

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