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试验研究

低/高温对暖通用SUS301L不锈钢离子渗氮层结构与耐磨性能的影响

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  • 1河南建筑职业技术学院设备工程系; 2中国建筑西北设计研究院有限公司; 3太原理工大学机械工程与运载学院

网络出版日期: 2025-07-09

Effect of Low/High Temperature on Structure and Wear Resistance of Ionic Nitriding Layer on SUS301L Stainless Steel for HVAC

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  • 1. Department of Equipment Engineering, Henan Vocational and Technical College of Architecture, Zhengzhou 500064, China;2. China Architecture Northwest Design & Research Institute Co., Ltd., Xi’an 710018, China;3. College of Mechanical Engineering and Vehicle Engineering, Taiyuan university of technology, Taiyuan 030024, China

Online published: 2025-07-09

摘要

为了提高暖通用SUS301L不锈钢表面的综合性能,在低温(500 ℃)和高温(900 ℃)2种温度下对其表面实施渗氮形成离子渗氮层,通过试验测试的方式分析了离子渗氮层的微观组织与耐磨特性。结果表明:500 ℃渗氮处理后基体表面形成了约7 μm的离子渗氮层和平直分布的白亮组织,组织中只溶入了很低比例的氮;900 ℃进行渗氮处理后基体表面形成了23 μm厚的离子渗氮层,该离子渗氮层的XRD谱中形成了CrN与N的衍射峰。经过500 ℃与900 ℃渗氮后试样都发生了硬度的大幅提升,硬度最大的是900 ℃下制得的离子渗氮层。500 ℃下制得的离子渗氮层的硬度随着载荷的提高而不断减小。相对于SUS301L不锈钢基体,离子渗氮层的摩擦系数更加稳定,表明离子渗氮层具有更优的摩擦磨损特性。离子渗氮层的磨痕深度与宽度相比基体均明显降低,900 ℃渗氮后的试样获得了比500 ℃渗氮后的试样更高的磨损量。

本文引用格式

郭红伟, 杨春方, 崔志广, 郭宇 . 低/高温对暖通用SUS301L不锈钢离子渗氮层结构与耐磨性能的影响[J]. 材料保护, 2021 , 54(7) : 74 . DOI: 10.16577/j.cnki.42-1215/tb.2021.07.012

Abstract

In order to improve the comprehensive performance of the surface of SUS301L stainless steel used for heating, ventilation and air conditioning (HVAC), the surface nitriding was carried out to form an ionic nitriding layer at low temperature (500 ℃) and high temperature (900 ℃), and the microstructure and wear characteristic of the ionic nitriding layer were analyzed by various methods. Results showed that when nitriding at 500 ℃, an ionic nitriding layer with about 7 μm was formed on the substrate surface, accompanied with white light organization distributed flatly, and the organization only dissolved a very small ratio of N. At 900 ℃, an ionic nitriding layer with the thickness of about 23 μm was obtained on the substrate surface by nitriding treatment, and the diffraction peak corresponding to CrN and N was detected in the XRD spectrum of the ionic nitriding layer. After nitriding at 500 ℃ and 900 ℃, the hardness of the samples increased greatly. The hardness of the ionic nitriding layer prepared at 900 ℃ was the highest. Moreover, gradually increasing the load caused the decline of the hardness of the ionic nitriding layer obtained at 500 ℃. Compared with SUS301L stainless steel substrate, the friction coefficient of ionic nitriding layer was more stable, indicating that the ionic nitriding layer had better friction and wear characteristics. Besides, the depth and width of the wear mark of the ionic nitriding layer decreased obviously, and the wear amount of the sample after nitriding at 900 ℃ was higher than that of the ionic nitriding layer at 500 ℃.
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