结合应用机械变形和氮化处理,实现 316 不锈钢的最佳机械性能和防腐性能

IF 2.1 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
JOM Pub Date : 2024-09-24 DOI:10.1007/s11837-024-06874-y
Jagadeesh Neduri, Gajanan P. Chaudhari, Sai Ramudu Meka
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引用次数: 0

摘要

热机械和热化学表面处理是优化金属材料性能的成熟方法。本研究探讨了低温轧制在 316 不锈钢中诱导马氏体对其腐蚀特性的影响,以及低温渗氮后这些特性的变化方式。对 316 不锈钢试样进行低温轧制,以实现不同的位错密度和马氏体分数,然后在 425°C 下进行盐浴氮化 4 小时。马氏体含量的增加导致氮化层变厚,马氏体衍射峰广泛变宽,向低衍射角的偏移相对较少。与奥氏体相相比,随后的氮化使马氏体相的硬度大幅提高。电化学测量结果表明,马氏体的发展降低了耐腐蚀性,但随后的渗氮处理增强了耐腐蚀性。所观察到的不同电化学特性与奥氏体和马氏体相中存在的位错以及 N 与位错和取代元素的结合特性有关。低温轧制和氮化的连续应用可提供机械和电化学性能的最佳组合。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Combined Application of Mechanical Deformation and Nitriding to Realize Optimal Mechanical and Anticorrosion Properties for 316 Stainless Steel

Thermo-mechanical and thermochemical surface treatments are well-established methods for optimizing the properties of metallic materials. This study examines the effect of cryo-rolling-induced martensite in 316 stainless steel on its corrosion characteristics and the way these characteristics alter after low-temperature nitriding. 316 stainless steel specimens were cryo-rolled to realize varying dislocation densities and martensite fractions followed by salt bath nitriding at 425°C for 4 h. Detailed microstructural and electrochemical characterizations were performed after different stages. Increased martensite content resulted in a thicker nitrided layer, and the martensite diffraction peaks were extensively broadened with relatively less shift towards lower diffraction angles. Subsequent nitriding led to a much higher hardness increase for martensite phase compared to austenite phase. Electrochemical measurements showed that martensite development reduced the corrosion resistance; however, the following nitriding treatment enhanced the corrosion resistance. The distinct electrochemical properties observed were related to the presence of dislocations and binding characteristics of N with dislocations and substitutional elements of austenite and martensite phases. Successive application of cryo-rolling and nitriding can offer optimal combination of mechanical and electrochemical properties.

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来源期刊
JOM
JOM 工程技术-材料科学:综合
CiteScore
4.50
自引率
3.80%
发文量
540
审稿时长
2.8 months
期刊介绍: JOM is a technical journal devoted to exploring the many aspects of materials science and engineering. JOM reports scholarly work that explores the state-of-the-art processing, fabrication, design, and application of metals, ceramics, plastics, composites, and other materials. In pursuing this goal, JOM strives to balance the interests of the laboratory and the marketplace by reporting academic, industrial, and government-sponsored work from around the world.
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