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通过镱钇铝石榴石表面重熔对GX40CrNiSi25-20铸造不锈钢进行超声空化侵蚀行为研究。

Ultrasonic Cavitation Erosion Behavior of GX40CrNiSi25-20 Cast Stainless Steel through Yb-YAG Surface Remelting.

作者信息

Cosma Daniela, Mitelea Ion, Bordeașu Ilare, Uțu Ion Dragoș, Crăciunescu Corneliu Marius

机构信息

Department of Materials and Fabrication Engineering, Politehnica University Timisoara, Bulevardul Mihai Viteazul nr. 1, 300222 Timișoara, Romania.

Department of Mechanical Machines, Equipment and Transports, Politehnica University Timisoara, Bulevardul Mihai Viteazul nr. 1, 300222 Timișoara, Romania.

出版信息

Materials (Basel). 2024 Aug 23;17(17):4180. doi: 10.3390/ma17174180.

DOI:10.3390/ma17174180
PMID:39274569
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11395954/
Abstract

Laser beam remelting is a relatively simple and highly effective technique for the physical modification of surfaces to improve resistance to cavitation erosion. In this study, we investigated the effect of laser remelting on the surface of cast stainless steel with 0.40% C, 25% Cr, 20% Ni, and 1.5% Si on cavitation erosion behavior in tap water. The investigation was conducted using a piezoceramic crystal vibrator apparatus. Base laser beam parameters were carefully selected to result in a defect-free surface (no porosity, material burn, cracks) with hardness capable of generating better resistance to cavitation erosion. The experimental results were compared with those of the reference material. Surface morphology and microstructure evolution after cavitation tests were analyzed using an optical metallographic microscope (OM), scanning electron microscope (SEM), and hardness tests to explore the mechanism of improving surface degradation resistance. The conducted research demonstrated that surfaces modified by laser remelting exhibit a 4.8-5.1 times greater increase in cavitation erosion resistance due to the homogenization of chemical composition and refinement of the microstructure, while maintaining the properties of the base material.

摘要

激光束重熔是一种相对简单且高效的表面物理改性技术，可提高抗气蚀性能。在本研究中，我们研究了激光重熔对含0.40% C、25% Cr、20% Ni和1.5% Si的铸造不锈钢表面在自来水中气蚀行为的影响。研究使用压电陶瓷晶体振动器装置进行。仔细选择基础激光束参数，以获得无缺陷表面（无孔隙、材料烧伤、裂纹），其硬度能够产生更好的抗气蚀性能。将实验结果与参考材料的结果进行比较。使用光学金相显微镜（OM）、扫描电子显微镜（SEM）和硬度测试分析气蚀试验后的表面形貌和微观结构演变，以探索提高表面抗降解性能的机制。所进行的研究表明，由于化学成分的均匀化和微观结构的细化，同时保持基材的性能，经激光重熔改性的表面气蚀抗性提高了4.8 - 5.1倍。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/89fc/11395954/56ea36b30c04/materials-17-04180-g013a.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/89fc/11395954/19f301b40c5f/materials-17-04180-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/89fc/11395954/0b3446e6284e/materials-17-04180-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/89fc/11395954/56ea36b30c04/materials-17-04180-g013a.jpg

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Materials (Basel). 2021 Dec 23;15(1):93. doi: 10.3390/ma15010093.
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Ultrasonic cavitation erosion of gas nitrided Ti-6Al-4V alloys.气体氮化 Ti-6Al-4V 合金的超声空蚀腐蚀。
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