ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2010, Vol. 31 ›› Issue (1): 30-32.

• 工艺技术 • 上一篇    下一篇

37Mn5钢管外折叠成因分析和工艺控制

魏军1, 洪慧平1, 廖向军1, 王孟1, 李春雨1, 康永林1   

  1. 1北京科技大学材料科学与工程学院,北京100083;
    2承德建龙特殊钢有限公司,承德067201
  • 出版日期:2010-02-01 发布日期:2022-10-25
  • 作者简介:魏军(1969-),男,博士后,特种钢质量研究。

Analysis on Formation of Outer Fold of 37Mn5 Steel Tube and Process Control

Wei Jun1,2,  Hong Huiping1,  Liao Xiangjun1,  Wang Meng1 , Li Chunyu1,  Kang Yonglin1   

  1. 1 School of Materials Science and Engineering, University of Science and Technology, Beijing 100083 ;
    2 Chengde Jianlong Special Steel Co, Ltd, Chengde 067201
  • Published:2010-02-01 Online:2022-10-25

摘要: 通过对37Mn5钢(%:0.39C、1.30Mn)Φ85 mm×8 mm管外折叠缺陷的分析,得出钢晶界处存在尺寸~20μm的硅酸盐和SiO2等脆性夹杂物是钢管外折叠形成的主要原因。通过控制转炉出钢后钢包顶渣厚度≤50mm,LF精炼(FeO)≤1%,白渣时间≥15 min,软吹氩≥10 min,全程保护连铸,使[O]为(11.6~17.1)×10-6,钢中夹杂级别A类为0~2.0,B、C类为0,D类为0.5~1.0,有效地控制钢管外折叠的发生。

关键词: 37Mn5钢管, 外折叠, 成因, 工艺控制

Abstract: According to the analysis on outer fold defect of Φ85 mm x 8 mm tube of 37Mn5 steel (0. 39% C, 1. 30% Mn) , it is obtained that the ~ 20 μm brittle inclusions-silicate and SiO2 existing at grain boundary in steel is main reason for formation of tube outer fold. With controlling thickness of top slag ≤50 mm in ladle after LD tapping, (FeO)≤l% , white slag time ≥15 min and soft argon blowing ≥10 min in LF refining, shield casting in whole process, the [ 0 ] is (11. 6 - 17. 1) x 10-6 and the rating of inclusions in steel of A series is 0 ~ 2. 0,of B and C series is 0 and of D series is 0. 5 ~ 1. 0, that are available to control the formation of outer fold of steel tube.

Key words: 37Mn5 Steel Tube, Outer Fold,, Reason for Formation,, Process Control