激光透射焊接聚碳酸酯接头性能研究  

Research on the Properties of Through-Transmission Laser Welding of Polycarbonate

作　　者：张卫 张庆茂 郭亮 张健 

机构地区：[1]广东省微纳光子功能材料与器件重点实验室,广东广州510006

出　　处：《中国激光》2012年第7期52-58,共7页Chinese Journal of Lasers

基　　金：中央财政支持地方高校专项资金(510-C10293);粤港关键技术招标东莞专项(20092052060010);广东省教育部产学研结合重点项目(2010A090200048);广东省教育厅学科建设专项(CXZD1139);华南理工大学国家金属材料近净成形工程技术研究中心开放基金(2011006)资助课题

摘　　要：为研究聚碳酸酯激光透射焊接接头性能,采用10W半导体端抽运全固态(DPSS)激光器进行了聚碳酸酯材料的激光透射焊接。采用光学金相显微镜(OM)、场发射扫描电子显微镜(SEM)和电子万能实验拉力机分析了接头的显微形貌、断口形貌和拉伸剪切强度。结果表明,在激光功率8 W、激光频率50kHz、焊接速度350mm/s、激光扫描间距0.1mm时,试样的拉伸剪切强度达到44MPa,为母材强度的68%,焊缝内部的分层和气孔是影响接头力学性能和断裂机制的主要原因,通过激光塑料透射焊接技术,可以获得接头力学性能良好的焊接试样。A 10 W diode pumped solid state （DPSS） laser is employed for through-transmission welding of polycarbonate to study the properties of weld joint. Optical microscope （OM）, scanning electron microscope （SEM） and tensile machine are employed for analyzing the morphology of the welded joint, fracture and tensile-shear stress. The results show that under the condition of 8 W laser power, 50 kHz laser frequency, 350 mm/s scanning velocity and 0.1 mm scanning interval, the tensilelshear stresses of the samples are 44 MPa, which research 68 % of the basic materials. Layering and pores in the welded joint are the main factors of low mechanical properties and different fracture mechanisms and with this approach we can get weld joint with good mechanical properties.

关 键 词：激光技术 激光焊接 透射焊接 拉伸剪切强度 聚碳酸酯 断口形貌 

分 类 号：O436[机械工程—光学工程]