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 ›› 2009, Vol. 30 ›› Issue (1): 46-47.

• 工艺技术 • 上一篇    下一篇

承德建龙70 t LD-LF-CC流程生产20CrMnTiH齿轮钢的工艺实践

张志宏   

  1. 承德建龙钢铁有限公司设计管理处,承德067201
  • 收稿日期:2008-07-03 出版日期:2009-02-01 发布日期:2022-11-30
  • 作者简介:张志宏( 1975-),男,硕士研究生,工程师,2006年北京科技大学毕业,从事优特钢品种开发工艺的研究,

Process Practice of Gear Steel 20CrMnTiH Production with 70 t LD-LF-CC Flow Sheet at Chengde Jianlong Steel

Zhang Zhihong   

  1. Drpl of Design and Maiicigrrnent, Chengde Jianlong Iron and Steel Co Lid, Chengde 067201
  • Received:2008-07-03 Published:2009-02-01 Online:2022-11-30

摘要: 通过高拉碳等操作使LD终点[C]0.05%~0.13%,出钢前钢包底预加钢芯铝、硅锰和铝锰进行脱氧合金化;采用挡渣技术和全程吹氩,控制LF精炼渣碱度2.5~3.0,加铝线脱氧、控制钢水中Als 0.020%~0.045%,加Ti后T[O]≤20×10-6,精炼末期喂硅钙线等工艺措施。该钢13炉分析、检验结果表明,该钢的成分(%)为: 0.17~0.22C、0.26~0.34Si、0.90~0.98Mn、1.08~1.13Cr、0.048~0.075Ti、0.015~0.021P、0.008~0.013S;钢材的氧含量≤20×10-6,氮含量≤70×10-6,J9和J15淬透带宽4 HRC,各项指标达到标准要求。

关键词: 20CrMnTiH齿轮钢, LD-LF-CC流程, 工艺实践

Abstract: Wilh llie technology operations such as catch carbon practice to get LD end [C] 0. 05 ~0. 13. pre-adding aluininiuni cladding steel, silicon-manganese and aliiminiuni-manganese at bottom of ladle before tapping for deoxidization and alloying, using slag stopping leclinology and blowing argon in whole phase, controlling LF refining slag basicity 2. 5 ~ 3. 0, adding Al wire deoxidizing to control Als eonlrnt in liquid steel 0. 020% 〜0.045。, alter adding Ti the T[O] ≤20 x 10 and feeding silieon-calcium wire in end refining period, the examination results of 13 heats of the steel showed that the analysis of strrl was 0. 17 〜0. 22C, 0. 26 〜0, 34Si, 0. 90-0. 98Mn, 1.08 - 1. 13Cr, 0. 048 〜0.075Ti, 0.015 〜0. 021P and 0. 008 ~0. 013S; the oxygen content in steel products ≤20 x 10-6 ,nitrogen content ≤70 x 10-6 , the width of hardenability band for J9  and J15  was HRC 4 and each property index met the requirements of standard.

Key words: Oar Steel 20(h-MnTiH, LD-LF-CC Flow Sheet, Process Practice