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Uniformity of temperature in cathodic cage technique in nitriding of austenitic stainless steel AISI 316

机译：奥氏体不锈钢AISI 316氮化处理中阴极笼技术的温度均匀性

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摘要

A series of austenitic stainless steel AISI 316 cylindrical samples with different heights and samples with the same height placed at different positions were simultaneously nitrided using the cathodic cage technique. In this technique the samples are placed on an insulate plate inside a metallic cage which shield the cathodic potential, therefore it stays under a floating potential. A systematic study of the nitriding temperature variation effects was carried out to evaluate the temperature uniformity inside the cage. The samples were characterised through optical microscopy, X-ray diffraction and microhardness measurement. The results were compared with those obtained through conventional ionic nitriding, and it was verified that the samples nitrided by conventional technique present similar surface hardness, less uniformity and lower nitrided layer thickness than the samples treated under similar conditions through this new technique.
机译：使用阴极笼技术同时氮化一系列具有不同高度的奥氏体不锈钢AISI 316圆柱样品和位于不同位置的相同高度的样品。在该技术中，将样品放置在金属笼中的绝缘板上，该绝缘笼屏蔽阴极电势，因此将其保持在浮动电势下。对渗氮温度变化影响进行了系统研究，以评估笼内温度的均匀性。通过光学显微镜，X射线衍射和显微硬度测量对样品进行表征。将结果与通过常规离子渗氮获得的结果进行比较，并证实与通过这种新技术在相似条件下处理的样品相比，通过常规技术氮化的样品具有相似的表面硬度，均匀度较低和氮化层厚度较低。

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