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 (6): 61-62.

• 组织和性能 • 上一篇    

轧制变形对U75V重轨钢珠光体晶粒度的影响

王晓丽1,2,刘霞2,史凤武3,周丽2,宋波1   

  1. 1北京科技大学冶金与生态工程学院,北京100083;
    2包头钢铁职业技术学院,包头014010;
    3包钢技术中心,包头014010
  • 收稿日期:2009-06-30 出版日期:2009-12-01 发布日期:2022-11-30
  • 作者简介:王晓丽(1973-),女,硏究生, 包头钢铁职业技术学院讲师,钢铁冶金和轧钢研究。

Influence of Rolling Reduction on Pearlite Grain Size in Heavy Rail of Steel U75V

Wang Xiaoli1,2, Liu Xia2, Shi Fengwu3, Zhou Li2, Song Bo1   

  1. 1 Metallurgical and Ecological Engineering School, University of Science and Technology, Beijing 100083 ;
    2 Baotou Iron and Steel Vocational Technical College, Baotou 014010;
    3 Technical Center, Baotou Iron and Steel Corp, Baotou 014010
  • Received:2009-06-30 Published:2009-12-01 Online:2022-11-30

摘要: U75V钢重轨由280 mm×380 mm铸坯经14道次粗轧(BD1)-中轧(BD2)和CCS 6道次精轧(UR1、ER、UR2、UR3、EF、UF)而成。用金相显微镜观察U75V重轨钢不同道次轧制变形试样的组织。结果表明,随重轨钢BD1E、BD2B、UR1和UF道次压缩比的增加,重轨头部、腰部和底部的珠光体晶粒度等级分别由6.0~6.5、6.0~6.5、6.0~6.5升至8.0~8.5、7.5~8.0、8.0~8.5,珠光体片层间距(μm)分别由0.51、0.41、0.49降至0.29、0.27、0.25,从而有利于提高重轨的力学性能。

关键词: 重轨钢, 压缩比, 组织

Abstract: Heavy rail of steel U75 V is rolled by 14 passes rough-rolling (BD1) - intermediate rolling (BD2) and 6 passes CCS finishing rolling ( UR1 , ER, UR2, UR3 , EF and UF) from 280 mm x 380 mm cast bloom. The structure in deformed sample of heavy rail of steel U75V at different pass was observed by using metallographic microscope. Results show that with increasing pass reduction ratio of heavy rail steel at BD1 E, BD2B, UR] and UF, the ratings of pearlite grain size at head, waist and bottom of heavy rail increase respectively from 6.0〜6. 5,6. 0 ~ 6. 5 and 6. 0 ~ 6. 5 to 8. 0 ~ 8. 5 , 7. 5 〜 8. 0 and 8. 0 ~ 8. 5 , at that the spaces between lamellae of pearlite decrease respectively from 0. 51 |±m, 0. 41 μm and 0. 49 to 0. 29 μm, 0. 27 μm and 0. 25 μm, that are available to increase the mechanical properties of heavy rail.

Key words: Heavy Rail Steel, Reduction Ratio, Structure