期刊论文

Shot peening influence and application on the shape of Al-based alloy thin-walled component

Liao, K.

中文

材料科学与工艺

1005-0299

2019

27

2

44-49

10.11951/j.issn.1005-0299.20170189

国家自然科学基金资助项目(51475483) 湖南省高校科技创新团队支持计划项目(2014207) 中南林业科技大学青年科学研究基金重点资助项目(QJ2012011A) 湖南省研究生科研创新项目(CX2017B405).

本校为第一且通讯机构

铝合金薄壁框架件铣削加工后会有不同程度的变形,表面喷砂强化既可以提高构件的机械性能,也可以对铣削加工后构件的变形进行矫正,这对构件的变形控制和形状稳定性都具有积极作用.本文针对薄壁件形状特点(壁厚2 mm),分别对构件底部和薄壁进行喷砂处理,并通过X-ray表面应力测试、表面硬度和变形测试,对喷砂后构件的变形状况进行分析.研究发现,改变喷砂粒度、空气压力和表面全喷覆次数,对材料表面应力进行调节,可使铣削加工后构件的变形得以调整,一定条件下,其变形矫直率达85%以上.分析认为,薄壁件形状特点与初始内应力水平使得表面应力在薄壁框架件变形中发挥了主要作用.因而,可以在不同位置采用差...

It is known that deformation always occurs after milling processing for the Al-based thin-walled components. Shot peening(SP) can not only improve the mechanical properties of components, but also makes this deformation recover, which plays a positive role in the deformation control and shape stability of components. In this study, based on the shape character with 2 mm wall, the deformation of components is investigated by X-ray stress determination, surface hardness and shape measurement experiments via SP treatment on bottom and wall. It is ...