800MPa级超细晶粒钢研究现状和发展趋势  

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

作　　者：宋立秋 

机构地区：[1]攀钢钢铁研究院,攀枝花617000

出　　处：《特殊钢》2005年第5期1-6,共6页Special Steel

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10μm降到1μm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。The 800 MPa grade ultra- 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 ultra-fine grain steel, recent development and trend in future of production process and welding technology are presented in this paper.

关 键 词：800MPa级 超细晶粒钢 工艺技术 研究 发展 发展趋势 变形诱导铁素体相变 a级 现状 动态相变 

分 类 号：TG115[金属学及工艺—物理冶金]