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 ›› 2018, Vol. 39 ›› Issue (1): 41-43.

所属专题: 齿轮钢

• 工艺技术 • 上一篇    下一篇

窄淬透性带20CrMnTiH齿轮钢的开发

刘年富   

  1. 宝钢特钢韶关有限公司特钢制造部,韶关 512123
  • 收稿日期:2017-08-30 出版日期:2018-02-01 发布日期:2022-07-01
  • 作者简介:刘年富(1981-),男,硕士(2007年广西大学),高级工程师, 2004年广西大学(本科)毕业,特殊钢产品开发及技术研究。

Development of Gear Steel 20CrMnTiH with Narrow Hardenability Band

Liu Nianfu   

  1. Department of Special Steel Manufacturing, Baosteel Special Steel Shaoguan Co Ltd, Shaoguan 512123
  • Received:2017-08-30 Published:2018-02-01 Online:2022-07-01

摘要: 开发的窄淬透性带20CrMnTiH齿轮钢的生产工艺流程为铁水预脱硫-130t BOF-LF-RH-280mm×280mm坯连铸-轧制至Φ60mm圆钢。通过设计的内控成分(/%:0.18~0.20C,0.20~0.30Si,0.90~0.98Mn,≤0.025P,≤0.010S,0.05~0.07Ti,≤0.0015O),设立结晶器电磁搅拌参数200A,2.5Hz,控制拉速0.62m/min,过热度15~30℃。检验结果表明,化学成分稳定,钢中氧含量≤11.3×10-6,非金属夹杂级别≤1.0,带状组织级别≤2.0,淬透性带宽HRC值≤3.5,满足产品协议要求。

关键词: 20CrMnTiH齿轮钢, 窄淬透性带, 130t BOF-LF-RH-280mm x280mm坯连铸, 产品开发

Abstract: The production process flowsheet for developed gear steel 20CrMnTiH with narrow hardenability band is metal pre~desulphurizalion-130t BOF-LF-RH-280 mm x 280 mm bloom casting-rolling to Φ60 mm round bar. With designed interior composition (/% : 0.18 ~ 0.20C, 0.20 ~ 0.30Si, 0.90 〜0.98Mn, ≤0. 025P, ≤0. 010S, 0.05 ~ 0.07Ti,≤0.0015O) , setting mold electromagnetism stirring parameters 200A, 2.5Hz, controlling casting speed 0.62 m/min, liquid superheating extent 15〜30 °C , the examination results show that the chemical composition is stable, the oxygen content in steel ≤1.3 x 10-6, the rating of nonmetallic inclusions ≤1.0, the rating of banding structure ≤2.0 and the AHRC value of hardenability band ≤3.5 to meet the requirement of products specification.

Key words: Gear Steel 20CrMnTiH, Narrow Hardenability Band, 130t BOF-LF-RH-280mm x 280mm Bloom Casting, Product Development