Study and Application on Thermodynamic Calculated Analysis of Calcium Treatment and Modification of Inclusions in High Strength Ship Plate Steel

贺道中; 周宇涛

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Study and Application on Thermodynamic Calculated Analysis of Calcium Treatment and Modification of Inclusions in High Strength Ship Plate Steel

更新时间：2026-01-21

- Study and Application on Thermodynamic Calculated Analysis of Calcium Treatment and Modification of Inclusions in High Strength Ship Plate Steel
- Special Steel Vol. 38, Issue 3, Pages: 23-27(2017)
- 作者机构：
  
  1. 湖南工业大学冶金与材料工程学院,株洲,412007
  2. 北京科技大学冶金与生态工程学院,北京,100083
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：28 December 2016，
  
  Online First：19 July 2022，
  
  Published：19 July 2017
- 稿件说明：
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贺道中, 周宇涛. Study and Application on Thermodynamic Calculated Analysis of Calcium Treatment and Modification of Inclusions in High Strength Ship Plate Steel[J]. Special Steel, 2017, 38(3): 23-27.
DOI：

贺道中, 周宇涛. Study and Application on Thermodynamic Calculated Analysis of Calcium Treatment and Modification of Inclusions in High Strength Ship Plate Steel[J]. Special Steel, 2017, 38(3): 23-27. DOI：

摘要

通过钙处理过程中Fe-Al-Ca-O-S体系的热力学平衡计算

得出在1873 K时各种平衡态下的[Al

]

-[O

]

、[Al

]

-[Ca

]

、[Al

]

-[S

]

平衡曲线图

并系统分析了各组元对夹杂物变质的影响。研究发现F-级高强度船板钢[Al

]

为0.02%~0.03%时

为保证夹杂物充分变质

钢中[O

]

控制在25×10

-6

以下;钢液中生成12CaO·7Al

的[Ca

]

为15.24×10

-6

~19.97×10

-6

生成3CaO·Al

的[Ca

]

为70.87×10

-6

~92.88×10

-6

适当低的钢液温度有利于生成CaS

抑制MnS的聚集析出。120t BOF-LF-VD-板坯连铸流程生产F-级高强度船板钢DNV F40（/%:0.092C

0.41Si

1.56Mn

0.015P

0.002S

0.032Al

0.035Nb

0.035Ni

0.010Ti

0.080V）的结果表明

当LF精炼渣组成/%:24.9Al

55.6CaO

7.7MgO

8.0SiO

1.24TFe

加钙前钢中铝含量0.03%

氧含量0.0010%时

每炉钢水喂纯钙线150m（0.21 kg/m）

钢中夹杂物由加钙前Al

变质为球形钙铝酸盐夹杂物。

Abstract

By calculation on thermodynamic equilibrium of Fe-Al-Ca-O-S system in calcium treatment process

the digrams of equilibrium curves of [ Al

]

-[O

]

[Al

]

-[Ca

]

and [Al

]

-[S

]

in each equilibrium condition at 1873K are obtained

and the effect of each component on modification of inclusions is systematically analyzed. It is found by study that in condition of 0.02%~0. 03% [Al

]

in F-grade high strength ship plate steel

in order to insure full accompli

shing modification of inclusions

the [O

]

in steel should control less than 25X10

-6

with forming 12CaO·7Al

in liquid the [Ca

]

is 15.24x10-

~19.97x10-

and with forming 3CaO·Al

in liquid the [Ca

]

is 70.87x10

-6

~ 92.88x10

-6

and with lower temperature of liquid it is available to form CaS and inhibit MnS clustered precipitation. The results of commercial production of F-grade high strength ship plate steel DNV F40 (/%: 0.092C

0.41Si

1.56Mn

0.015P

0.002S

0.032Al

0.035Nb

0.010Ti

0.080V) by 120t BOF-LF-VD-slab casting flowsheet show that with LF refining slag ingredient/% : 24.9Al

55.6CaO

7.7MgO

8.0SiO

and 1.24TFe

aluminium content in steel 0.03% and oxygen content in steel 0.0010% before adding calcium

and per heat feeding pure calcium wire 150m(0.21kg/m)

the inclusions in steel modified to spheroidal calcium aluminate inclusions from Al

before adding calcium.

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