Active screen plasma nitriding is a newly developed technique utilized to enhance low alloy steel's surface property by placing them inside a steel case and supplying biased voltage to the cage. In this work, low alloy steel EN24 samples are plasma nitrided using active screen at different process parameters to improve its surface properties. The EN24 samples are treated at 500˚C and 550˚C treatment temperature for 2 h, 4 h and 6 h with gas flow ratio of \({H}_{2}/{N}_{2}=4:1\).The active screen plasma-nitrided samples are analyzed with various analytical techniques such as SEM, XRD, EDS, microhardness test, weight loss technique and potentiodynamic polarization test. From the SEM analysis, it is found that the compound layers vary from 12.680 to 22.025 µm. Further, the SEM analysis also reveals the formation of transformed austenite phases with increasing temperature and treatment time. Phase identification is performed on treated samples by XRD, which reveals the formation of \(\varepsilon ({Fe}_{2-3}N)\) and \(\upgamma ({Fe}_{4}N)\) on the surface of the samples. Using the microhardness test, it is found that the hardness value of treated samples has increased by 3.5 times (approx.) from the base material. From the weight loss technique, the minimum weight loss is seen for the treated sample at 500˚C for 6 h. Finally, it is observed from the potentiodynamic polarization test of the sample treated at 550˚C for 6 h has the minimum corrosion rate of 446.20 mm/year × 10⁻³.

活性屏幕等离子渗氮是一种新开发的技术，用于通过将低合金钢放置在钢壳内并向笼子提供偏置电压来提高低合金钢的表面性能。在这项工作中，低合金钢 EN24 样品使用活性屏幕在不同的工艺参数下进行等离子氮化，以改善其表面性能。EN24 样品在 500˚C 和 550˚C 处理温度下处理 2 h、4 h 和 6 h，气体流量比为\({H}_{2}/{N}_{2}=4:1 \).采用SEM、XRD、EDS、显微硬度测试、失重技术和动电位极化测试等多种分析技术对活性屏等离子氮化样品进行分析。从 SEM 分析中发现，化合物层从 12.680 到 22.025 µm 不等。此外，SEM 分析还揭示了随着温度和处理时间的增加，转变奥氏体相的形成。通过XRD对处理过的样品进行物相鉴定，揭示了\(\varepsilon ({Fe}_{2-3}N)\)和\(\upgamma ({Fe}_{4}N)\)的形成在样品表面。使用显微硬度测试发现，处理过的样品的硬度值比母材增加了 3.5 倍（大约）。从重量损失技术来看，处理过的样品在 500°C 下 6 小时的重量损失最小。最后，从动电位极化试验中观察到，样品在 550˚C 下处理 6 h 的最小腐蚀速率为 446.20 mm/year × 10 ^-3。