摘要
为找出微成形过程中材料塑性与几何尺寸间的关系,在常温下对具有不同晶粒尺寸和几何尺寸的铜试件进行了拉伸实验。结果表明,在试件直径不变条件下,随着晶粒尺寸的增大,材料的延伸率逐渐降低;在晶粒尺寸不变条件下,随着试件直径的减小,材料延伸率在逐渐降低;材料的延伸率与试件晶粒个数有关;随着晶粒尺寸的增大或试件直径的减小,材料延伸率的波动性在逐渐增大。为微成形工艺设计、模具设计提供了必要的信息和基础数据。
In order to find relationship between material plasticity and geometrical dimensions in microforming, at room temperature, tensile tests of copper specimens with different geometrical dimensions and grain sizes are performed. Results show that under the condition of constant specimen diameter, with the increase of grain size, elongation of material is gradually decreased; Under the condition of constant grain size, with the decrease of specimens diameters, elongation of material is gradually decreased; Elongation is related to quantity of grain in specimens; With the increase of grain size or the decrease of specimens diameters, scatter of specimen elongation is gradually increased. Necessary information and fundamental data are provided by this study for the design of process and die in microforming.
出处
《锻压技术》
CAS
CSCD
北大核心
2006年第3期64-67,共4页
Forging & Stamping Technology
关键词
微成形
尺度效应
塑性
延伸率
microforming
scale effect
plasticity
elongation
