Effect of Metal Pretreatment-80 t LD-RH-LF-CC Process Flow on Inclusion in Pipeline Steel

王国承; 黄浪

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Effect of Metal Pretreatment-80 t LD-RH-LF-CC Process Flow on Inclusion in Pipeline Steel

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- Effect of Metal Pretreatment-80 t LD-RH-LF-CC Process Flow on Inclusion in Pipeline Steel
- Special Steel Vol. 30, Issue 5, Pages: 31-33(2009)
- 作者机构：
  
  1. 江西理工大学材料与化学工程学院,赣州,341000
  2. 新余钢铁公司,新余,338001
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：12 March 2009，
  
  Online First：21 November 2022，
  
  Published：21 November 2009
- 稿件说明：
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王国承, 黄浪. Effect of Metal Pretreatment-80 t LD-RH-LF-CC Process Flow on Inclusion in Pipeline Steel[J]. Special Steel, 2009, 30(5): 31-33.
DOI：

王国承, 黄浪. Effect of Metal Pretreatment-80 t LD-RH-LF-CC Process Flow on Inclusion in Pipeline Steel[J]. Special Steel, 2009, 30(5): 31-33. DOI：

摘要

通过鱼雷罐铁水喷粉脱硫处理

转炉加低硫废钢、出钢挡渣和加Si-Fe、Mn-Fe脱氧

控制终点[C

]

0.026%～0.030%

RH脱气处理和加Mn-Fe合金化

LF高碱度渣精炼和喂Ca线冶炼管线钢(%:0.039～0.042C、1.56～1.62Mn、0.01Ti、0.05Nb、0.03V)。检验结果表明

生产管线钢铸坯中的硫含量为(10～18)×10

-6

T[O

]

30×10

-6

铸坯中大部分夹杂物尺寸≤40μm

主要夹杂物为钙铝酸盐

夹杂和单独存在的MnS夹杂很少

有利于提高管线钢抗HIC(氢致开裂)性能。

Abstract

The pipeline steel(%:0.039~0.042C

1.56~1.62Mn

0.01Ti

0.05Nb

0.03V) was melted by torpedo desulfurization

adding low sulphur scrap in LD

LD tapping with slag stopper and adding deoxidizer Si-Fe and Mn-Fe and controlling end [C

]

0.026%～0.030%

RH degassing treatment and alloying added Mn-Fe

LF refining with high basicity slag and feeding Ca wire.Examination results showed that in cast billet of pipeline steel the sulphur content was (10~18)×10

-6

the T[O

]

=30×10

-6

the size of most inclusions ≤40 μm

and the main inclusion was calcium aluminate with few Al

and individual MnS being available to increase the resistance on hydrogen-induced cracking (HIC).

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