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 ›› 2006, Vol. 27 ›› Issue (3): 55-56.

• 工艺技术 • 上一篇    下一篇

铆螺钢冷镦开裂的分析和精炼工艺的改进

刘建勋1,2,李壮1,3,吴迪1   

  1. 1东北大学轧制技术及连轧自动化国家重点实验室,沈阳110004;
    2萍乡钢铁公司,萍乡337019;3沈阳航空工业学院,沈阳110034
  • 收稿日期:2006-01-15 出版日期:2006-05-08 发布日期:2023-03-13
  • 作者简介:刘建勋(1963-),男,教授级高工,博士研究生,1985年江 西冶金学院毕业,从事冶金工艺研究。
  • 基金资助:
    国家自然科学基金资助项目(50334410)

Analysis on Cold Upsetting Crack of Steel for Rivet and Improvement of Refining Process

Liu Jianxun1,2,Li Zhuang1,3, Wu Di1   

  1. 1 State Key lab of Roling and Automation, Northeastem University, Shenyang 110004;
    2 Pingxiang Iron and Steel Corp,Pingziang 337019;3 Shenyang College of Aeronautical Engineering,Shenyang 110034
  • Received:2006-01-15 Published:2006-05-08 Online:2023-03-13

摘要: 采用铁水预处理-LD-钢包吹氩工艺生产铆螺钢,通过对0.23%C~0.69%Mn铆螺钢冷镦开裂组织和夹杂物的扫描电镜和能谱分析得出,钢中存在多种元素复合夹杂物是铆螺钢冷镦开裂的主要原因。通过将钢包底吹氩压力由0.3 MPa提高到0.6~1.0 MPa,并由原工艺吹氩1 min后软吹氩、总吹氩时间为3 min改为吹氩3 min后软吹氩、保证总吹氩时间≥6 min,同时改进中间包烘烤工艺减少MgO夹杂,从而有效地避免了铆螺钢冷镦时的开裂现象。

关键词: 铆螺钢, 冷镦开裂, 复合夹杂物, 钢包吹氩

Abstract: The cold upsetting steel is produced by hot metal pretreatment - LD- ladle argon stiring process. It is obtained that the multi- elements compound inclusions in steel lead to cold upseting crack of steel based on analysis of structure and inclusions of cold upsetting crack of 0.23C-0.69Mn steel for rivet by scarning electon microscope and energy dispersive x- ray spectometer. With increasing ladle bottom blowing argon pressure from 0.3 MPa to 0.6~1.0 MPa,modified original blowing argon procedure - soft blowing argon after Ar stiring for 1 min and total blowing argon for 3 min to impruved blowing argon procedure - soft blowing argon after Ar stiring for 3 min and total blowing argon for more than 6 min,and improving baking process for tundish to decrease inclusion MgO,the cold upsetting crack of steel for rivet was effectively avaided.

Key words: Stcel for Rivet,Cold Upsetting Crack,Compound Inclusion,Ladle Argon Stiring