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Composite material of cermets made by SHS

机译:SHS制造的金属陶瓷复合材料

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摘要

Based on self-propagating high temperature synthesis (SHS) technology, the ceramic coating with thickness of 2.5 mm on the surface of carbon steel and square steel tube was produced under gravity condition. The phase compositions of the coating were determined by X-ray diffractometry. The microstructure of the coating, interfacial structure and hardness between coating and steel body were analyzed by optics microscopy and scanning electron microscopy. The wear resistance of the ceramic coating was investigated. The results show that the combine between ceramic coating and metal base body is firm. There are few air vents and good densification in the coating. Ceramic coating is mainly made up α-Al_2O_3 base body phase and FeO-Al_2O_3 spinelle phase. SiO_2 exists together with the crystallization quartz phase in the ceramic coating. The hardness(HV_(0.2)) of composite can reach 1 500. The wearability of ceramic coating is eight times higher than that of hardened steel No. 45 of HRC 50.
机译:基于自蔓延高温合成(SHS)技术,在重力条件下制备了碳钢和方钢管表面厚度为2.5mm的陶瓷涂层。涂层的相组成通过X射线衍射法测定。通过光学显微镜和扫描电子显微镜分析了涂层的显微组织,界面结构和钢与钢之间的硬度。研究了陶瓷涂层的耐磨性。结果表明,陶瓷涂层与金属基体的结合牢固。涂层中的通风孔少且致密性好。陶瓷涂层主要由α-Al_2O_3基体相和FeO-Al_2O_3尖晶石相组成。 SiO_2与结晶石英相一起存在于陶瓷涂层中。复合材料的硬度(HV_(0.2))可以达到1500。陶瓷涂层的耐磨性是HRC 50的45号硬化钢的八倍。

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