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首页> 外文期刊>International Materials Reviews >S-phase surface engineering of Fe-Cr, Co-Cr and Ni-Cr alloys
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S-phase surface engineering of Fe-Cr, Co-Cr and Ni-Cr alloys

机译：Fe-Cr，Co-Cr和Ni-Cr合金的S相表面工程

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摘要

Stainless steel, Co-Cr and Ni-Cr alloys have played an important role in many industrial sectors to combat environmental degradation. However, low hardness and poor wear properties have impeded their tribological and tribochemicai applications. Conventional thermochemical treatments can be used to significantly harden these passive alloys but at the expense of their corrosion resistance due to precipitation induced depletion of Cr in the matrix. Research in 1980s led to the discovery of a new expanded austenite phase, i.e. so called S-phase with combined improvement in wear and corrosion resistance. Recent research has revealed that S-phase can be formed not only in stainless steels but also in Co-Cr alloys and Ni-Cr alloys. It is the purpose of this paper to critically review the S-phase surface engineering of stainless steels, Co-Cr alloys and Ni-Cr alloys. Particular attention will be paid to the structure, formation conditions, supersaturation, hardening mechanisms and metastability of S-phase. Based on the discussion of the chemical, mechanical, tribological and tribochemicai properties of S-phase, the importance of the S-phase surface engineering technology is demonstrated by examples. Finally, future directions towards more stable and thicker S-phase layers will be discussed.
机译：不锈钢，Co-Cr和Ni-Cr合金在许多工业领域中对防止环境恶化起到了重要作用。但是，低硬度和较差的磨损性能阻碍了它们的摩擦学和摩擦化学应用。常规的热化学处理可以用来使这些钝化合金显着硬化，但是由于沉积引起的基体中Cr的耗尽，以牺牲其耐蚀性为代价。 1980年代的研究导致发现了一种新的扩展奥氏体相，即所谓的S相，同时提高了耐磨性和耐腐蚀性。最近的研究表明，S相不仅可以在不锈钢中形成，而且可以在Co-Cr合金和Ni-Cr合金中形成。本文的目的是严格审查不锈钢，钴铬合金和镍铬合金的S相表面工程。将特别注意S相的结构，形成条件，过饱和度，硬化机理和亚稳性。在对S相的化学，机械，摩擦学和摩擦化学性质进行讨论的基础上，通过实例证明了S相表面工程技术的重要性。最后，将讨论更稳定和更厚的S相层的未来发展方向。

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