Optimization of Slab Concasting Process of 9 % Ni Steel for Liquefied Natural Gas Tank

李建民; 陈远清; 刘东风; 仇圣桃; 吴夜明

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Optimization of Slab Concasting Process of 9 % Ni Steel for Liquefied Natural Gas Tank

更新时间：2026-01-21

- Optimization of Slab Concasting Process of 9 % Ni Steel for Liquefied Natural Gas Tank
- Special Steel Vol. 33, Issue 5, Pages: 29-31(2012)
- 作者机构：
  
  1. 太原不锈钢股份有限公司技术中心，太原O3OOO3
  2. 钢铁研究总院连铸技术国家工程研究中心,北京,100081
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：05 March 2012，
  
  Online First：09 October 2022，
  
  Published：09 October 2012
- 稿件说明：
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李建民, 陈远清, 刘东风, et al. Optimization of Slab Concasting Process of 9 % Ni Steel for Liquefied Natural Gas Tank[J]. Special Steel, 2012, 33(5): 29-31.
DOI：

李建民, 陈远清, 刘东风, et al. Optimization of Slab Concasting Process of 9 % Ni Steel for Liquefied Natural Gas Tank[J]. Special Steel, 2012, 33(5): 29-31. DOI：

摘要

分析了9%Ni钢(/%:≤0.10C、≤0.35Si、0.30～0.80Mn、≤0.005S、≤0.008P、8.5～10.0Ni、≤0.10Mo、≤0.10Al)200～220 mm板坯连铸试生产中出现的结晶器液面结壳、铸坯表面网裂纹产生原因

对连铸工艺进行优化。结果表明

液相线温度偏差是导致9%Ni钢液面结壳的主要原因

基于差示扫描量热法(DSC)的实测数据建立了新的液相线温度计算公式

得出试验的9%Ni钢的液相线温度

在钢水过热度为10～30℃时能较好地满足板坯的连铸要求。通过控制[N

]

≤25×10

-6

[Al

]

≤0.03%

二冷比水量由0.6L/kg降至0.4L/kg

使9%Ni钢连铸顺行

铸坯内部和表面质量良好。

Abstract

The formation causes of occurred shell at meniscus in mold and network crack of slab surface in pilot con- casting production of 200 - 220 mm slab of 9% Ni steel (/% : ≤0. 10C

≤0. 35Si

0. 30 〜0. 80Mn

≤0. 005S

≤0. 008P

8. 5 ~ 10. ONi

≤0. 1OMo

≤0. 10A1) are analyzed

and the optimization on concasting process has been carried out. Results show that the calculated deviation of liquidus temperature of 9% Ni steel is the main cause led to the shell occurred at meniscus and based on experimental data by differential scanning calorimetry (DSC)

a new liquidus temperature calculation formula is established to get the liquidus temperature of tested 9% Ni steel

and as the overheat extent of liquid is 10 ~30 ℃

it is available to meet the requirement of slab concasting. With controlling [N

]

≤25 x 10

-6

[ Al

]

≤0. 03% and decreasing secondary cooli

ng water rate from 0. 6 L/kg to 0. 4 L/kg the concasting of 9% Ni steel is going on smoothly

the inner and surface quality of slab is nice.

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