PDF《累积叠轧技术的研究现状与展望》

第 卷第 期 中国有色金属学报 年月17

6 2007

6 Vol.

17 No.6 The Chinese Journal of Nonferrous Metals Jun.

2007 文章编号:1004-0609(2007)06-0841-11 累积叠轧技术的研究现状与展望 詹美燕,李元元,陈维平 (华南理工大学 机械工程学院,广州 510640) 摘要:对采用累积叠轧工艺制备超细晶组织的技术进行详细的综述,介绍了累积叠轧技术的原理、ARB 材料的 组织与力学性能特征,并对 ARB 变形过程中的剪切变形、晶粒细化机制和强化机制进行分析.采用 ARB 技术可 以制备大尺寸的超细晶组织材料,其室温抗拉强度通常比粗晶材料的高 2~4 倍.ARB 材料的强化源于晶粒细化、 位错强化、在大变形轧制时形成的稳定基面织构、表面的氧化膜以及内生原有夹杂物在强烈塑性变形情况下的破 碎与弥散分布.分析了 ARB 技术的优越性,对其在制备超细晶材料领域的应用进行了展望. 关键词:累积叠轧;

超细晶;

剧塑性变形;

微观组织;

力学性能 中图分类号:TG 142.1 文献标识码:A Status and expectation of research on accumulative roll-bonding ZHAN Mei-yan, LI Yuan-yuan, CHEN Wei-ping (School of Mechanical Engineering, South China University of Technology, Guangzhou 510640, China) Abstract: The process of accumulative roll-bonding was reviewed. The principle of ARB, the ARB processed microstructure and mechanical properties were described in detail. The shear strain, mechanism of grain refining and strengthening were analyzed. Large size materials with ultrafine grains can be achieved easily by ARB process, whose tensile strength is usually 2?4 times compared with those of coarse grain materials. The strengthening can be attributed to the ultrafine grains, dislocation and texture developed during ARB process, as well as the dispersed oxide films and inclusions on the surfaces by repetition. According to its advantages on the manufacture of high-strength bulk materials at a high level of productivity, ARB is a promising process in preparing materials with UFG microstructure. Key words: accumulative roll-bonding;

ultrafine grains;

severe plastic deformation;

microstructure;

mechanical properties

1 剧塑性变形工艺制备超细晶组织 近年来, 关于纳米晶和超细晶/亚微米晶的加工工 艺、组织和性能的研究受到广泛关注.通常认为纳米 晶的晶粒尺寸范围为 d