ISSN:1003-8620

CN:42-1243/TF

Governed by: CITIC Pacific Special Steel Group Co., LTD

Sponsored by: Daye Special Steel Co., LTD.

Special Steel ›› 2005, Vol. 26 ›› Issue (5): 1-6.

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Research and Development status of 800 MPa Grade Ultra-Fine Grain Steel

Song Liqiu   

  1. Iron and Steel Research Institute , Panzhihua Iron and Steel(Group)Corp , Panzhihua 617000
  • Received:2005-04-11 Online:2005-10-01 Published:2023-03-18

800MPa级超细晶粒钢研究现状和发展趋势

宋立秋   

  1. 攀钢钢铁研究院,攀枝花 617000
  • 作者简介:宋立秋(1964),女,1985年沈阳大学毕业,从事冶金新产品开发和材料研究。

Abstract: The 800 MPa grade ulra-fine grain steel is a kind of high strength-toughness low carbon(0.05%C) microalloying steel by the rolling technology of multi-directional thermomechanical treatment,large angle cross rolling,heavy deformation strain-introducing ferrite phase transformation,relaxation precipitation controlling transformation and promoting acicular ferrite deformation to decrease grain size of steel to less than 1 μm from 10 μm. The theory research of 800 MPa grade ulra-fine grain steel,recent development and tend in future of production process and welding technology are present- ed in this paper.

Key words: 800 MPa Grade, Utra-Fine Grain Steel, Technology, Research, Development

摘要: 800MPa 级超细晶粒钢是通过多向变形热处理,大角度交叉轧制,大变形应变诱导动态相变和 铁素体动态相变,大变形诱导铁素体相变,弛豫析出控制相变,促进针状铁素体形成等轧制技术,将钢中的晶 粒尺寸由10 μm 降到1 μm 以下,从而达到高强韧性的一种低碳(0.05%C)微合金化钢。介绍了国内外800MPa级超细晶粒钢的理论研究、生产工艺和焊接技术的新进展和今后发展趋势。

关键词: 800MPa级, 超细晶粒钢, 工艺技术, 研究, 发展