Guimarães André, Gomes Daniel, Vieira André, Oliveira Serafim M
CISeD-Research Centre for Digital Services, Polytechnic Institute of Viseu, Av. Cor. José Maria Vale de Andrade, 3504-510 Viseu, Portugal.
CISE-Electomechatronic Systems Research Centre, University of Beira Interior, Rua Marquês de Ávila e Bolama, 6201-001 Covilhã, Portugal.
Materials (Basel). 2025 Jun 4;18(11):2638. doi: 10.3390/ma18112638.
Laser technology is widely regarded as a highly effective method for welding thermoplastic polymers due to its precision, cleanliness, and versatility. This study investigates the effects of laser power and scanning speed on the through-thickness hardness of polypropylene plates, analyzing the heat-affected zone (HAZ) and hardness variations along the depth of the weld bead. Using the Trumpf Trudisk 6602 laser source, multiple polypropylene passes were made with different power levels (200 W and 300 W) and scanning speeds (5, 10, 20, 30, 40, and 50 mm/s). The results indicate a direct correlation between laser power and scanning speed in the final width and depth of the weld bead. Furthermore, results indicate that higher scanning speeds and lower power promote a more uniform distribution of hardness across the thickness. This study contributes to understanding laser-assisted welding processes in polymeric materials, providing information on the influence of different laser parameters on weld quality and resulting material properties.
由于激光技术具有精度高、清洁度高和通用性强等特点，它被广泛认为是焊接热塑性聚合物的一种高效方法。本研究调查了激光功率和扫描速度对聚丙烯板材全厚度硬度的影响，分析了热影响区（HAZ）以及沿焊缝深度的硬度变化。使用通快Trudisk 6602激光源，在不同功率水平（200瓦和300瓦）和扫描速度（5、10、20、30、40和50毫米/秒）下对多个聚丙烯板材进行焊接。结果表明，焊缝的最终宽度和深度与激光功率和扫描速度之间存在直接关联。此外，结果表明，较高的扫描速度和较低的功率可促进硬度在整个厚度上更均匀地分布。本研究有助于理解聚合物材料中的激光辅助焊接工艺，提供了不同激光参数对焊接质量和所得材料性能影响的相关信息。
