硬质合金表面微织构制备实验研究

The Preparation of the Research about Micro-texture on the Surface of Cemented Carbide

本文利用光纤激光打标机在硬质合金刀具前刀面上进行了微沟槽织构的加工对比试验,总结了光切法显微镜测量两种不同微织构深度的方法经验,分析了输出功率、脉冲频率、打标次数和打标速度等不同工艺参数对微织构的参数和质量的影响。结果表明:随着输出功率和打标次数的增加,微沟槽深度均表现出增大的趋势,而打标速度与脉冲频率则反之;微沟槽宽度仅与平均输出功率呈明显正相关,采用较大的脉冲频率和输出功率能够改善微织构的形貌和质量;当Q脉冲宽度为4000 ns时,微织构底部形貌更加均匀光滑。

In this paper, the comparative trials are carried out in fiber laser machining of micro-grooves on the rake face of cemented carbide cutting tool. The author summarizes the experience about measuring depth of micro-texture by light-cutting microscope, analyzing the effects of various processing parameters on topography and quality of micro-textures, such as average output power, pulse repetition rate, marking number of times and marking speed. The experiment results show that the depth of micro-grooves have an increasing tendency with the increase of the average output power and marking number of times, but marking speed and pulse repetition rate have the opposite on it. However, the width of micro-grooves are only influenced by average output power. Moreover, the morphologies of micro-textures can be improved by the large average output power and pulse repetition rate. Furthermore, it is observed that bottom morphologies of the micro-grooves are more uniform and smoother when Q-pulse width is 4000 ns.