摘要
为了探索激光切割技术对铝合金材料力学性能和疲劳性能的影响,采用试验分析方法,用机械铣削和激光切割方法分别制备了两类试件,对其进行了拉伸试验、疲劳寿命试验以及切割表面质量评估。对比分析了两种加工方式对其力学性能和疲劳寿命的影响,分析结果表明:经过激光切割后铝合金材料的抗拉强度、延伸率均有所下降,但屈服强度稍有增加;激光切割后的疲劳寿命比机械铣削试件疲劳寿命短,但切缝若经过打磨处理,其寿命又高于不打磨的试件寿命;同时通过表面精度测量分析,激光加工铝合金虽然存在挂渣,但仍有较高的表面质量。
In order to explore the effect of laser cutting technology on mechanical properties and fatigue properties of aluminum alloy materials,test analysis method is used in this study. Two kinds of test pieces were prepared by mechanical milling and laser cutting,and tensile,fatigue life tests and cutting surface quality assessment were carried out. The effects of two processing methods on the mechanical properties and fatigue life are compared and the results show that the tensile strength and elongation of the aluminum alloy in laser cutting has decreased,but the yield strength has slightly increased. After laser cutting,the fatigue life is shorter than that of the mechanical milling specimen,but the life of the test pieces in laser cutting is higher than that of the non-polished specimen. At the same time,surface accuracy analysis,shows that laser processing of aluminum alloy is of a high surface quality although certain degree of slag exists.
出处
《陕西理工学院学报（自然科学版）》
2016年第2期6-10,共5页
Journal of Shananxi University of Technology:Natural Science Edition
基金
陕西省科技厅科研计划研究项目(2014JM7268)
陕西省教育厅科学研究计划项目(14JK1147)
陕西理工学院研究生基金资助项目(SLGYCX153)
关键词
铝合金
激光切割
切割质量
疲劳寿命
aluminum alloy
laser cutting
cutting quality
fatigue life
