硬质合金刀具皮秒激光加工表面形貌及成分变化研究
Study on Surface Morphology and Composition Change of Cemented Carbide Tool in Picosecond Laser Processing
洪云 1王成勇 1邓阳 1赖志伟 1刘宇华1
作者信息
- 1. 广东工业大学机电工程学院;高性能工具全国重点实验室
- 折叠
摘要
聚焦于硬质合金皮秒激光加工表面成分变化特性,研究了不同激光能流密度对硬质合金表面形貌、粗糙度、材料去除特性和化学成分的影响,重点讨论了烧结WC-Co硬质合金在皮秒激光加工前后的表面特性,获得不同能流密度激光与WC-Co材料的作用机制,结果表明,在低能流密度下,激光与WC-Co的作用机制主要是浅表层熔化机制,属于激光抛光,在WC-Co刀具激光加工中可用作精加工工序;在高能流密度下,激光与WC-Co的作用机制主要在材料深度方向稳定去除,在WC-Co刀具激光加工中可用作粗加工工序.本研究为WC-Co刀具的激光加工提供了理论参考和数据支持.
Abstract
This paper focuses on the change characteristics of the surface composition during picosecond laser pro-cessing of cemented carbide,and studies the effects of different laser energy flux densities on the surface morphology,rough-ness,material removal characteristics and chemical composition of cemented carbide.The surface characteristics of sintered WC-Co cemented carbide before and after picosecond laser processing are mainly discussed.The mechanism of interaction between laser and WC-Co materials with different energy flux densities is obtained,and it is concluded that the mechanism of interaction between laser and WC-Co at low energy flux densities is mainly shallow surface melting mechanism,belonging to laser polishing,which could be used as finishing process in the laser processing of WC-Co tool.At high energy flow den-sity,the mechanism of interaction between laser and WC-Co is mainly stable removal of materials in the depth direction,which can be used as rough machining process in the laser processing of WC-Co tool.This study provides theoretical refer-ence and data support for laser machining of WC-Co tools.
关键词
硬质合金刀具/超快激光/能流密度/表面形貌/元素成分Key words
cemented carbide tool/ultrafast laser/energy flow density/surface morphology/element composition引用本文复制引用
基金项目
广东省科技攻关计划(2020B090924005)
出版年
2024
NETL
NSTL
万方数据