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提出了一种激光驱动飞片微塑性温成形方法,采用波长1064nm的Yd:YAG激光器进行了温成形实验,对T2紫铜成形件三维形貌进行观测,分析了温度(25℃,100℃,150℃,200℃)与激光能量(1020,1380,1690,1900mJ)对成形深度的影响;使用纳米压痕仪研究了成形件成形区域硬度变化规律,并对成形机理进行了初步分析。结果表明,激光驱动飞片微塑性温成形方法可以获得较好的综合性能:不仅可以提高紫铜温成形能力,而且可以适当增强冲击区域硬度。分析认为,激光驱动飞片微塑性温成形是激光驱动飞片冲击强化机制与温度软化机制相互竞争的结果。
A thermoforming method of laser-driven flying-film micro-plasticity was proposed. The temperature-forming (25 ℃, 100 ℃, 150 ℃) was analyzed with the Yd: YAG laser at 1064nm. ℃, 200 ℃) and laser energy (1020, 1380, 1690 and 1900mJ) on the forming depth. The variation of hardness of forming area was studied by nanoindenter, and the forming mechanism was analyzed preliminarily. The results show that the laser-driven flying-film micro-plastic thermoforming method can achieve better overall performance: not only can improve the warm forming ability of copper, but also can appropriately enhance the impact area hardness. It is analyzed that the laser-driven micro-thermoforming is the result of the laser-driven flying-film impact-strengthening and temperature-softening mechanisms competing with each other.