通过DED-L制造的等级Ni-Fe涂层的微观结构特征
Marco Brand1,2, Ion-Dragoş Uțu1, Nicușor-Alin Sîrbu3
1Department of Materials and Manufacturing Engineering, Faculty of Mechanical Engineering, Politehnica University Timişoara, Bv. Mihai Viteazu 1, 300222 Timisoara, Romania.
Materials (Basel, Switzerland)
|January 28, 2026
概括
优化定向能量沉积激光 (DED-L) 参数,特别是扫描速度和沉积策略,是实现密集,无缺陷的Ni和Fe基涂层的关键,以提高耐磨性.
科学领域:
- 材料科学 材料科学 材料科学
- 增材制造 增材制造 增材制造
- 表面工程是什么?表面工程是什么?
背景情况:
- 定向能量沉积激光 (DED-L) 是一种多功能添加剂制造技术,用于创建高性能涂层.
- 通过DED-L生产的功能分级材料提供了更好的耐腐蚀性和耐磨性,这是由于组成的灵活性.
- 优化工艺参数对于实现密集,无缺陷的涂层具有所需性能至关重要.
研究的目的:
- 研究扫描速度和沉积策略对DED-L.L.生产的Ni和Fe基涂料的微观结构和质量的影响.
- 确定最佳的DED-L参数,以最大限度地降低孔隙性,并最大限度地提高分级涂料的均性.
- 确定加工参数和涂层特性之间的关系.
主要方法:
- 使用定向能量沉积激光器 (DED-L) 来沉积基于Ni和Fe的粉末.
- 多种扫描速度和沉积策略 (单向,双向,带/不带层旋转),同时保持恒定的激光功率和口距离.
- 采用激光显微镜和电子显微镜来分析涂层的微观结构,多孔性和均性.
主要成果:
- 最佳的DED-L参数导致了密集,均的涂层,孔径最小,并改善了层间粘合.
- 不充分的参数导致多孔,不规则的沉积,损害了涂层的完整性和几何.
- 一个双向沉积路径与90度的层旋转证明了在涂层质量方面优异的结果.
结论:
- 扫描速度和沉积策略显著影响DED-L加工的等级Ni和Fe基涂料的质量.
- 双向沉积与层旋转是一种有前途的策略,用于生产高质量,无缺陷的涂层.
- 需要进一步的研究,以充分描述这些优化涂料的特性和性能.
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