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Published in last 1 year |  In last 2 years |  In last 3 years |  All Please wait a minute... For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails Select Research progress on mechanical properties and oxidation resistance of CrAlN-based coatings He Tao, Cao Hongshuai, Li Beibei, Qi Fugang, Zhao Nie, Liao Bin, Ouyang Xiaoping Heat Treatment of Metals    2024, 49 (9): 297-307.   doi:10.13251/j.issn.0254-6051.2024.09.050 Abstract （109）      PDF （4170KB）（65）       Knowledge map    CrAlN coatings are extensively applied in the protection of the cutting tools and molds due to their higher hardness and abrasive resistance. Firstly, the structure of CrAlN coatings and its effect on the mechanical properties and thermal decomposition mechanism of the coatings is introduced in the present review, and then pointing out that the Al content and its existence mode are important factors affecting the structure and properties of CrAlN crystals. Secondly, research status of CrAlN-based multicomponent coating and multilayer coating about the mechanical properties and high temperature oxidation resistance properties is reviewed. Focused on the doping modification of elements and the designing of multilayer coating structure, the advantages and disadvantages of various modification methods are compared and analyzed, then the doping of Si, Y, V and their influence to the performance of coating are summarized, and pointing out that constructing nanoscale multilayer coating can significantly improve the performance. Finally, the high-temperature oxidation behavior and high-temperature failure mechanism of CrAlN-based coatings are discussed, providing a reference for the performance optimization of CrAlN-based hard coatings. Reference | Related Articles | Metrics Select Research progress of vacuum low-pressure carburizing technology and equipment development Jiang Chao, Cong Peiwu, Lu Wenlin, Yao Jiawei, Ma Jingbo, Liu Guihua, Du Chunhui Heat Treatment of Metals    2024, 49 (12): 111-121.   doi:10.13251/j.issn.0254-6051.2024.12.020 Abstract （49）      PDF （3301KB）（43）       Knowledge map    Current research status of vacuum low-pressure carburizing technology was systematically discussed. The development trend of vacuum low-pressure carburizing technology was analyzed from the prospectives of process, theory, equipment and application, which provides ideas for breaking the bottleneck of single strengthening performance technology and promoting the application of vacuum low-pressure carburizing technology in new materials and fields. At the same time, the development of vacuum low-pressure carburizing equipment at home and abroad was compared, providing reference and inspiration for equipment manufacturing enterprises. Reference | Related Articles | Metrics Select Research progress on on-line heat treatment technology for U75V steel rail with 100-meter length Zhanghui Zeying, Gao Mingxin, Song Hua, Wang Yang, Yang Jian Heat Treatment of Metals    2024, 49 (6): 270-276.   doi:10.13251/j.issn.0254-6051.2024.06.042 Abstract （46）      PDF （1439KB）（45）       Knowledge map    Methods, characteristics and research progress of on-line heat treatment process for U75V steel rail with 100-meter length were summarized. Effects of heat treatment cooling process parameters and spray cooling process parameters on the production efficiency, microstructure and mechanical properties of the heat treated U75V steel rail with 100-meter length were introduced. Suggestions for future research on the heat treatment process of pearlite rail with 100-meter length were proposed. It is meaningful to study the effect of cooling process parameters on the microstructure and mechanical properties of the steel rails, with the goal of shortening the required heat treatment cooling time, and optimize them. Reducing the allowable fluctuation range of alloy composition content is beneficial for improving the properties of the U75V steel rail in combination with the optimization of heat treatment process. A nozzle or air spraying process that combines heat transfer capability and uniformity is beneficial for optimizing the heat treatment process of the steel rails and improving their properties. Reference | Related Articles | Metrics Select Research progress on influence of electromagnetic field on microstructure and properties of aluminum alloys Zhong Zhendong, Fan Jintao, Wang Fusheng, Chen Yajun Heat Treatment of Metals    2024, 49 (6): 261-269.   doi:10.13251/j.issn.0254-6051.2024.06.041 Abstract （39）      PDF （2239KB）（41）       Knowledge map    Electromagnetic field treatment process of aluminum alloys was summarized, and the influence of electromagnetic field treatment process on microstructure and properties of aluminum alloys was analyzed from three levels: microstructure, macroscopic properties, and action mechanism. The factors influencing the selection of electromagnetic field treatment process parameters on aluminum alloys is summarized, and the mechanism of optimizing the microstructure and properties of aluminum alloys by electromagnetic field is revealed. Finally, the focus and direction of future research on electromagnetic field treatment process are discussed. Reference | Related Articles | Metrics