B and Ce composite microalloying for improving high-temperature oxidation resistance of 254SMO super-austenite stainless steel

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL Intermetallics Pub Date : 2024-08-26 DOI:10.1016/j.intermet.2024.108457

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Abstract

Aiming at serious oxidation problem of 254SMO super-austenitic stainless steel during hot working, the influence of B and Ce composite microalloying on its oxidation behavior was comparatively investigated at 1050 and 1100 °C. The results demonstrated that the combination of B and Ce can significantly alter the composition of the oxide film in 254SMO. Particularly, B and Ce composite microalloying can effectively promote the diffusion of Cr to the surface, and form a dense Cr₂O₃ oxide film at a faster rate in the initial stage, which is more conducive to inhibiting the Mo volatilization and thus improving the oxidation resistance of 254SMO steels. Additionally, compared to the 0.005 wt% B (50B) and 0.005 wt% B together with 0.002 wt% Ce (50B + 20Ce) samples, the addition of 0.005 wt% B together with 0.005 wt% Ce (50B + 50Ce) had a more significant effect on improving high-temperature oxidation resistance of 254SMO. This research provides a valuable scholarly reference for improving the oxidation resistance of super-austenite stainless steels.

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B 和 Ce 复合微合金化用于提高 254SMO 超级奥氏体不锈钢的高温抗氧化性

针对 254SMO 超级奥氏体不锈钢在热加工过程中出现的严重氧化问题，比较研究了 B 和 Ce 复合微合金化对其在 1050 和 1100 ℃ 下氧化行为的影响。结果表明，B 和 Ce 的组合能显著改变 254SMO 氧化膜的成分。尤其是 B 和 Ce 复合微合金化能有效促进 Cr 向表面扩散，并在初始阶段以更快的速度形成致密的 Cr2O3 氧化膜，这更有利于抑制 Mo 的挥发，从而提高 254SMO 钢的抗氧化性。此外，与添加 0.005 wt% B（50B）和 0.005 wt% B 连同 0.002 wt% Ce（50B + 20Ce）的样品相比，添加 0.005 wt% B 连同 0.005 wt% Ce（50B + 50Ce）对提高 254SMO的高温抗氧化性具有更显著的效果。这项研究为提高超奥氏体不锈钢的抗氧化性提供了有价值的学术参考。

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来源期刊

Intermetallics 工程技术-材料科学：综合

CiteScore

7.80

自引率

9.10%

发文量

291

审稿时长

37 days

期刊介绍： This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys. The journal reports the science and engineering of metallic materials in the following aspects: Theories and experiments which address the relationship between property and structure in all length scales. Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations. Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties. Technological applications resulting from the understanding of property-structure relationship in materials. Novel and cutting-edge results warranting rapid communication. The journal also publishes special issues on selected topics and overviews by invitation only.