Tribocorrosion and Electrochemical Behavior of DIN 1.4110 Martensitic Stainless Steels After Cryogenic Heat Treatment

DIN 1.4110 martensitic stainless steel is largely used in the cutlery industry due to its high corrosion resistance associated with high mechanical resistance. However, when this material works under corrosion and wear conditions at the same time, their synergistic effect can accelerate the degradation process of the alloy. Cryogenic heat treatments have been proposed to improve the dimensional stability and mechanical properties, since they minimize the amount of retained austenite. The aim of this work is to study the effect of deep cryogenic heat treatment at -80 ºC and at -196 ºC on the corrosion resistance and tribocorrosion behavior of DIN 1.4110 martensitic stainless steel. The microstructure, hardness, corrosion resistance and tribocorrosion behavior were evaluated. Although the heat-treated samples presented higher hardness and lower corrosion current density (icorr) compared to samples in spheroidized condition, their material removal under tribocorrosion conditions increased, which demonstrated the synergy between corrosion and wear.

DIN 1.4110马氏体不锈钢（martensitic stainless steel）凭借高耐蚀性与高力学性能，被广泛应用于餐具制造行业。然而，当该材料同时处于腐蚀与磨损复合工况时，二者的协同效应会加速合金的退化过程。深冷热处理已被提出用于改善材料的尺寸稳定性与力学性能，因其可降低残余奥氏体（retained austenite）的含量。本研究旨在探究-80℃与-196℃深冷热处理对DIN 1.4110马氏体不锈钢耐蚀性能及摩擦腐蚀（tribocorrosion）行为的影响。研究中对试样的微观组织、硬度、耐蚀性能及摩擦腐蚀行为进行了评估。尽管经深冷热处理的试样相较于球化处理态试样，具有更高的硬度与更低的腐蚀电流密度（icorr），但其在摩擦腐蚀工况下的材料去除量有所提升，这证实了腐蚀与磨损之间的协同效应。