激光热力强化电化学沉积试验研究

Experiment study of laser thermal-mechanical enhanced electrochemical deposition

为了进一步揭示激光的热力效应对电化学沉积的强化作用,构建了激光电化学复合沉积试验系统,进行了理论分析和实验验证。采用激光循环往复的扫描方式照射沉积区域制备沉积层试样,对沉积过程中的力效应和热效应进行测试,最后采用扫描电子显微镜对沉积层的表面形貌和截面形貌进行观察对比。结果表明,激光的热力效应能加快金属离子的还原反应,促进晶核形成和晶粒细化,在激光能量为0.2m J(20k Hz)时,能获得良好的沉积速率(0.198mg/min);在激光能量为0.4m J(20k Hz)时,沉积层的拉伸强度性能较好,达到256.38MPa。此研究结果对电解加工技术的发展是有一定帮助的。

In order to reveal the laser thermal-mechanical effect on electrochemical deposition further, a laserelectrochemical composite deposition system was constructed, and the system was analyzed and verified. Specimens wereprepared in the exposure area by laser round scanning, and mechanical effect and thermal effect was developed in the processing.Finally scanning electron microscope was used to observe surface morphologies of specimens. The results show that laser thermomechanicaleffect could speed up the reduction reaction of metal ions, promote nucleation and grain refinement. The depositionrate is enhanced at 0. 198mg/min when laser energy is 0. 2mJ（20kHz） , and tensile strength is strengthened at 256. 38MPa whenlaser energy is 0.4mJ （20kH z）. The results are useful for the development of electrochemical machining technology later.