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 ›› 2021, Vol. 42 ›› Issue (1): 61-65.

• 组织和性能 • 上一篇    下一篇

粗轧工艺对700 MPa Ti微合金化高强钢的组织及性能的影响

陈述   

  1. 攀钢集团研究院有限公司钒钛资源综合利用国家重点实验室
  • 收稿日期:2020-07-09 出版日期:2021-02-01 发布日期:2022-04-11
  • 作者简介:陈 述(1983-),男,硕士(2018年重庆大学),工程师,2007年中国科学技术大学(本科)毕业,金属材料物理检验、板带钢产品开发。

Effect of Rough Rolling Process on Microstructure and Mechanical Properties of 700 MPa Ti Micro-Alloyed High-Strength Steel

Chen Shu   

  1. Pangang Group Research Institute Co Ltd, State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilizationy Panzhihua 617000

  • Received:2020-07-09 Published:2021-02-01 Online:2022-04-11

摘要: 研究了700 MPa级Ti微合金化高强钢(/%: 0.05~0.07C,0.05~0.10Si,1.10~1.25Mn, 0.075~0.095Ti) 230 mm×(1580~1780) mm连铸板坯粗轧工艺中定宽量100~300 mm和2~6道次分配量对最终10 mm板组织的影响。结果表明,定宽量的增加会增加组织的不均匀性,使铁素体带状组织更粗大,并提高拉伸断口分层的倾向;均匀分配的道次分配量也能提高最终组织的均匀性;两种影响因素以定宽量的影响更为显著;定宽量≤100 mm、单道次变形量≥20%是理想的工艺参数。

关键词: Ti微合金化, 粗轧, 板坯定宽量, 拉伸分层

Abstract: The effect of 230 mm x (1 580 ~ 1 780) mm cast slab rough rolling slab 100 ~300 mm width sizing press and 2~6 pass reduction partition of 700 MPa Ti micro-alloyed high-strength steel (/% :0. 05 ~0. 07C,0. 05 ~ 0. l0Si, 1. 10~1. 25Mn,0. 075 ~ 0. 095Ti) on the final 10 mm plate microstructure is studied. The results show that the inhomogeneity of microstructure will become more obvious when the extent of slab sizing press increases, as well as the size of the banded structure of ferrite well increase, and the tensile lamination cracks occurred trend will increase too. It also shows that the microstructure will be more uniform when the rolling reductions of different passes are uniform. The slab sizing press a- mount has more influence on the uniform of the microstructure than the rolling reduction partition of different passes. The i- deal process should be with the slab width sizing ≤100 mm and the single rolling reduction ≥20%.

Key words: Ti Micro-Alloying, Rough Rolling, Slab Width Sizing Press, Tensile Lamination Cracks ,