Analysis on Inclusions in Low Aluminium Steel 15CrMoG for Boiler Pipe Refining in 100t LF by Si-Ca Deoxidation

吴明洋

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Analysis on Inclusions in Low Aluminium Steel 15CrMoG for Boiler Pipe Refining in 100t LF by Si-Ca Deoxidation

更新时间：2026-01-21

- Analysis on Inclusions in Low Aluminium Steel 15CrMoG for Boiler Pipe Refining in 100t LF by Si-Ca Deoxidation
- Special Steel Vol. 39, Issue 1, Pages: 65-67(2018)
- 作者机构：
  
  山东钢铁股份有限公司莱芜分公司特钢事业部,莱芜,271105
- 作者简介：
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- Online First：01 July 2022，
  
  Published：01 July 2018
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吴明洋. Analysis on Inclusions in Low Aluminium Steel 15CrMoG for Boiler Pipe Refining in 100t LF by Si-Ca Deoxidation[J]. Special Steel, 2018, 39(1): 65-67.
DOI：

吴明洋. Analysis on Inclusions in Low Aluminium Steel 15CrMoG for Boiler Pipe Refining in 100t LF by Si-Ca Deoxidation[J]. Special Steel, 2018, 39(1): 65-67. DOI：

摘要

高压锅炉管用钢15CrMoG（/%:0.12~0.18C

0.17~0.35Si

0.40~0.70Mn

≤0.015P

≤0.015S

0.80~1.10Cr

0.40~0.55Mo

≤0.020Alt）的生产工艺流程为60%铁水+优质废钢-100t UHP EAF-LF-VD-Φ500mm坯连铸-轧制。通过电弧炉出钢Al-Si预脱氧

LF精炼Si-Ca脱氧

优化精炼渣系的组成为（/%）:55~60CaO

30~35Al

5~10SiO

（CaO）/（Al

）=1.41~1.74

精炼后钢水中的Alt为0.011%~0.014%。Φ140mm和Φ160mm热轧材的夹杂物分析结果表明

钢中夹杂物中MnS为10%

铝酸钙为75%

SiO

7.5%

含Ti氧化物5%

其它2.5%

钢中≤5.0μm夹杂物占95%以上

满足锅炉管用钢15CrMoG的技术要求。

Abstract

The production process flowsheet of steel 15CrMoG for high pressure boiler pipe (/% : 0.12~0.18C

0.17~0.35Si

0.40~0.70Mn

≤0.015P

≤0.015S

0.80~1.lOCr

0.40~0.55Mo

≤0.020Alt) is 60% hot metal + quality scrap- 100t UHP EAF-LF -VD-Φ500mm bloom casting-rolling. With Al-Si pre-deoxidation in EAF tapping

Si-Ca deoxidation in LF refining

and using optimized refining slag (/% ) : 55~60CaO

30~35A1

5~10SiO

(CaO)/( A1

) =1.41~1.74

the Alt content in refined liquid is 0.011%~0.014%. The analysis results on inclusions in Φ140mm and Φ160mm hot rolled products show that the ingredient of inclusions in steel is 10% MnS

75% calcium alum

inate

7.5% SiO

5% oxide containing Ti

and 2.5% others

and the ≤5.0μm inclusions make up more than 95% of the total mount of inclusions in steel to meet the technical requirement of steel 15CrMoG for boiler pipe.

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