飞秒激光处理对提高选择性激光熔化17-4PH不锈钢耐腐蚀性的研究

Femtosecond Laser Treatment for Improving the Corrosion Resistance of Selective Laser Melted 17-4PH Stainless Steel.

作者信息

Meng Lingjian, Long Jiazhao, Yang Huan, Shen Wenjing, Li Chunbo, Yang Can, Wang Meng, Li Jiaming

机构信息

Sino-German College of Intelligent Manufacturing, Shenzhen Technology University, Shenzhen 518118, China.

Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510631, China.

出版信息

Micromachines (Basel). 2022 Jul 9;13(7):1089. doi: 10.3390/mi13071089.

DOI:10.3390/mi13071089

PMID:35888906

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9317285/

Abstract

Currently, laser surface treatment (LST) is considered the most promising method available within the industry. It delivers precise control over surface topography, morphology, wettability, and chemistry, making the technique suitable for regulating the corrosion behavior of alloys. In this paper, femtosecond laser texturing with different parameters and atmosphere environments was adopted to clarify the effect of surface treatment on the corrosion resistance of selective laser melted (SLM-ed) 17-4PH stainless steel (SS) in a NaCl solution. The experimental results show that, after the heat treatment, the corrosion resistance of the laser-treated samples was enhanced. With the further laser treatment in an argon atmosphere, the oxidation of nanostructural surfaces was avoided. The Cr, Cu, and other alloying elements precipitated on the laser-ablated surface were beneficial to the formation of a passivation film, leading to an improved corrosion resistance performance.

摘要

目前，激光表面处理（LST）被认为是该行业内最具前景的方法。它能对表面形貌、形态、润湿性和化学性质进行精确控制，使该技术适用于调节合金的腐蚀行为。本文采用不同参数和气氛环境的飞秒激光纹理化处理，以阐明表面处理对选择性激光熔化（SLM）17-4PH不锈钢（SS）在NaCl溶液中耐蚀性的影响。实验结果表明，热处理后，激光处理样品的耐蚀性增强。在氩气气氛中进一步进行激光处理，可避免纳米结构表面的氧化。在激光烧蚀表面析出的Cr、Cu等合金元素有利于钝化膜的形成，从而提高了耐腐蚀性能。