Dong Fuyuan, Zhang Mingxu, Peng Fan, Zhang Jianglong
School of Materials Science and Engineering, North Minzu University, Yinchuan 750021, Ningxia, China.
Key Laboratory of Powders & Advanced Ceramics, North Minzu University, Yinchuan 750021, Ningxia, China.
Comput Intell Neurosci. 2022 Sep 26;2022:4825356. doi: 10.1155/2022/4825356. eCollection 2022.
In the production and life of machines, wear is the main form of material failure. Many workpieces and equipment will produce friction and wear during use, causing energy and material consumption, resulting in huge economic losses. In the process of using engineering equipment, in order to improve the service life of the workpiece and improve the wear-resistant material, the research of the material itself must be closely linked with the wear mechanism. Among the antiwear materials, the application of high-chromium cast iron is the most common. The reason is that high-chromium cast iron has a series of advantages in performance, manufacturing technology, and price. However, high-chromium cast iron itself has high C content and high brittleness, resulting in defects in toughness and poor corrosion resistance. When working in harsh environments such as mechanical extrusion, high-strength wear, and chemical corrosion, cracking and deformation are prone to occur, corrosion and peeling, and another damage failure. High chromium cast iron must have a relatively stable structure, good strength and toughness, excellent wear resistance, and corrosion resistance. In this study, the static corrosion performance of high-chromium cast iron was tested to study the effects of Mo and V elements addition and content changes on corrosion resistance and vanadium, molybdenum, and subcritical treatment processes on the microstructure and properties of high-chromium cast iron, in order to obtain better performance. Lower cost high chromium cast iron castings. As a wear-resistant part, high-chromium cast iron castings are widely used in wear and can cope with harsh working environments, but their excellent hardness conditions bring certain defects in toughness and at the same time lack good corrosion resistance, in mechanical extrusion., high-strength wear, chemical corrosion, and other harsh environments are prone to damage and failure. Therefore, high-chromium cast iron should have dual properties, not only high hardness but also suitable for mud, sand, chemicals, and other media corrosion and wear resistance.
在机器的生产和生活中，磨损是材料失效的主要形式。许多工件和设备在使用过程中会产生摩擦和磨损，导致能量和材料消耗，造成巨大的经济损失。在工程设备的使用过程中，为了提高工件的使用寿命和改进耐磨材料，材料本身的研究必须与磨损机制紧密联系。在抗磨材料中，高铬铸铁的应用最为普遍。原因是高铬铸铁在性能、制造工艺和价格方面具有一系列优势。然而，高铬铸铁本身含碳量高、脆性大，导致韧性方面存在缺陷且耐腐蚀性差。在机械挤压、高强度磨损和化学腐蚀等恶劣环境下工作时，容易出现开裂、变形、腐蚀和剥落等其他损坏失效情况。高铬铸铁必须具备相对稳定的组织、良好的强度和韧性、优异的耐磨性和耐腐蚀性。在本研究中，对高铬铸铁的静态腐蚀性能进行了测试，以研究添加Mo和V元素及其含量变化对耐腐蚀性的影响，以及钒、钼和亚临界处理工艺对高铬铸铁组织和性能的影响，从而获得性能更好、成本更低的高铬铸铁铸件。作为耐磨部件，高铬铸铁铸件广泛应用于磨损领域，能够应对恶劣的工作环境，但其优异的硬度条件在韧性方面带来了一定缺陷，同时缺乏良好的耐腐蚀性，在机械挤压、高强度磨损、化学腐蚀等恶劣环境下容易损坏和失效。因此，高铬铸铁应具备双重性能，不仅要有高硬度，还要适合泥浆、沙子、化学品等介质的腐蚀和耐磨。
