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国外文献 > 1.轴承 > 3. 材料与制造 > 轴承材料

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标 题： Corrosion Behavior of M50 NiL Steel by Liquid Nitriding Method for Aerospace Bearings
液氮渗氮法处理M50 NiL钢在航空航天轴承中的腐蚀行为
作 者： B. Venkatesh
P. Pavan Kumar
C. Anil Kumar Reddy
Manish Roy
R. Vamshi
L. Harinath
关键词： Bearing steel  [轴承钢]
Hardness  [ 硬度]
OCV  [ OCV]
Liquid nitriding  [ 液氮渗氮]
Corrosion  [ 腐蚀]
出版年： 2025
文集名： Recent Advances in Materials and Manufacturing Science - Select Proceedings of ICRAM 2025
材料与制造科学的最新进展——ICRAM 2025 会议论文精选
会议名： 5th International Conference on Recent Advances in Mechanical Infrastructure (ICRAM 2025)
第五届机械基础设施最新进展国际会议（ICRAM 2025）
届 次： 5th
摘 要： In the aerospace sector, M50 NiL steel is utilized for high-performance bearing steel in aero-engine shafts. M50 denotes a high alloy steel that employs nitriding for secondary strengthening. The heat treatment prior to nitriding aims for a strong core and hardened surface, with nitriding minimally affecting these traits. Surface coating enhances the hardness and corrosion resistance of M50 bearing steel. The nitriding process omits tempering and hardening steps. Liquid nitriding is utilized in this context. The nitriding procedure was conducted over various temperatures and durations for experimental assessment. This study's primary goal is to evaluate the microstructure, hardness, and corrosion resistance of bearing steel. Research has investigated the corrosion behavior of M50 bearing steel in environments like sodium chloride (NaCl) solutions. The material is initially shaped using electrical discharge machining (EDM) for precise dimensions. Heat treatment is crucial for improving corrosion resistance. Electro potentiodynamic testing evaluates the surface roughness of materials through diverse parameters. Materials are immersed in the solution for three hours. By using potentiostat apparatus, corroded surfaces are characterized, and Tafel plots are drawn; from the results obtained, it is evident that lower temperature samples exhibited better corrosion rate than untreated M50 NiL steel.

在航空航天领域，M50 NiL钢被用于航空发动机轴的高性能轴承钢。M50指一种采用氮化处理进行二次强化的高合金钢。氮化前的热处理旨在获得强心部和硬化表面，而氮化处理对这些特性的影响极小。表面涂层可进一步提高M50轴承钢的硬度和耐腐蚀性。该工艺省去了回火和淬火步骤，采用液态氮化处理。氮化过程在不同温度和时间下进行，以供实验评估。本研究的主要目标是评价轴承钢的微观结构、硬度和耐腐蚀性能。研究还考察了M50轴承钢在氯化钠（NaCl）溶液等环境中的腐蚀行为。材料首先通过电火花加工（EDM）进行精确成型。热处理对于提升耐腐蚀性至关重要。电位动力学测试通过多种参数评估材料的表面粗糙度。材料在溶液中浸泡三小时。通过使用恒电位仪装置，对腐蚀表面进行表征，并绘制塔菲尔图。根据实验结果可知，低温样品的腐蚀速率优于未经处理的M50 NiL钢。
中文内容为网络AI翻译，专业术语未必准确，仅供参考。

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