基于长脉冲激光的304L不锈钢表面微织构加工  

Processing of Microstructures on 304L Stainless Steel Surface Based on Long Pulse Laser

作　　者：王玲[1] 王兴盛[1] 黎宁慧 康敏[1] 

机构地区：[1]南京农业大学工学院,江苏南京210000

出　　处：《激光与光电子学进展》2017年第3期170-177,共8页Laser & Optoelectronics Progress

基　　金：江苏省自然科学基金青年基金(BK20150685);中央高校基本科研业务费(KYZ201659);南京农业大学工学院优秀青年人才科技基金(YQ201604)

摘　　要：通过改变长脉冲激光输出功率和脉宽,在304L不锈钢表面加工出凹坑、凸包微织构,并观察了它们的形貌特征。研究结果表明,利用小脉宽、大功率激光可加工得到外形较好的凹坑,脉宽不变时,凹坑深度和直径随功率的增加呈先上升后下降的趋势。然而,大脉宽、小功率激光加工可得到外形较好的凸包,功率对凸包形貌的影响比脉宽的影响大,当功率达到一定值时,凸包高度和直径达到饱和状态。The dimple and bump microstructures on 304L stainless steel surface are processed by modulating the power and pulse duration of a long pulsed laser, and their morphology features are observed. The research results show that dimples with good morphology can be obtained under short pulse duration and high power and the dimple depth and diameter increase first and then decrease with the increase o{ laser power when the pulse duration is fixed. In contrast, bumps with good morphology can be obtained under long pulse duration and low power, the influence of power on bumps is stronger than that of pulse duration, and when the power reaches a certain value, the bump height and diameter approach to saturation.

关 键 词：激光技术 表面微织构 长脉冲激光 表面形貌 

分 类 号：TG178[金属学及工艺—金属表面处理]