摘要
沟槽状表面织构广泛应用于机械密封、缸套活塞环等机械摩擦部件，其性能取决于加工后的几何参数，因此高效准确地加工出理想尺寸的织构显得尤为重要。运用不同的激光输出功率、重复频率和扫描速度在高速钢表面加工沟槽状表面织构，设计了三水平三因素的全面实验，系统研究了加工参数与沟槽织构几何参数的关系。结果显示：随着激光重复频率的增加，沟槽织构深度和宽度均呈现先略微增大后减小的趋势。扫描速度增大使沟槽织构深度先增加后减小，而宽度均随着扫描速度的增大而变大。方差分析表明：较之激光输出功率，激光扫描速度、重复频率及其交互作用对织构加工深度和宽度的影响更显著。输出功率在10-14w之间、重复频率在20—30kHz之间、扫描速度1000mm/s左右时，加工高速钢表面沟槽织构的质量较好。同时，压痕实验证明，在织构边缘区域硬度明显增加。
Groove surface texture was widely used in the frictional mechanical part, such as mechanical seal, cylinder liner and piston ring, whose performance depends on its geometric parameter of the texture. Therefore, it is important to process the surface texture efficiently with accurate geometric parameter. Groove surface textures were fabricated on high-speed steel by lasers with different output powers, repetition frequencies and scanning speeds. Comprehensive experiments with three levels and three factors were designed to study the relationships between texture topographies and the three processing parameters. The experimental results showed that the depth and width of the groove surface texture slightly increased firstly and then decreased with the rise of laser repetition frequency. Moreover, with the incensement of laser scanning speed, the depth of the groove surface texture increased firstly and then decreased, but the width of the groove surface texture continued to rise. Variance analysis showed that laser scanning speed and repetition frequency had more obvious influence on the width and depth of groove surface texture than the output power. High-quality groove surface texture would be processed on the high-speed steel by laser with the output power of 10W to 14W, the repetition frequency of 20kHz to 30kHz and the scanning speed of about 1000mm/s. Meanwhile, indentation testing indicated that the hardness on marginal area of surface texture markedly increased.
出处
《红外与激光工程》
EI
CSCD
北大核心
2016年第2期138-145,共8页
Infrared and Laser Engineering
基金
科技创新团队资助项目(2014KCT-03)
军内科研项目
关键词
沟槽状表面织构
高速钢
激光
输出功率
重复频率
扫描速度
硬度
groove surface texture
high-speed steel
laser
output power
repetition frequency
scanning speed
hardness
