石凤健,王雷刚,许涛,芦笙

• 1:江苏大学材料科学与工程学院
• 2:江苏科技大学先进焊接技术省级重点实验室

摘要(Abstract)：

介绍了反复镦压工艺的原理、路线及特点,并研究了纯铜反复镦压后的组织、硬度及拉伸性能。结果表明,反复镦压可在不改变试样形状和尺寸的情况下累积很大的应变。退火态纯铜经多道次镦压后晶粒明显细化。3道次镦压前,纯铜的平均显微硬度随应变的增加快速增加,随镦压次数的进一步增加,硬度上升的幅度下降。多道次镦压后纯铜的抗拉强度明显提高,从退火态的198.5 MPa提高到最高约488.8 MPa。镦压后纯铜的断后伸长率明显下降,但仍在15%以上,其断裂性质仍属韧性断裂。研究结果说明反复镦压是一种有应用前景的制备块体细晶材料的方法。

关键词(KeyWords)： 反复镦压;纯铜;超细晶;硬度;拉伸性能

Abstract:

Keywords:

基金项目(Foundation): 镇江市科技成果转化项目(cz2008009);; 江苏科技大学本科生创新计划专项经费资助(BKCX20100605)

作者(Author): 石凤健,王雷刚,许涛,芦笙

DOI: 10.13289/j.issn.1009-6264.2011.12.018

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