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为提高铝合金耐磨性能并延长铝合金产品的使用寿命,利用电弧喷涂对铝合金进行316 L不锈钢涂层喷涂,喷涂后进行350℃×5 h的热扩散处理。采用OM和SEM进行涂层的微观组织分析,采用EDX对涂层与基体界面进行元素分析,并用维氏硬度计对涂层的硬度进行测试,并分析了涂层的磨损机理。结果表明:经热扩散处理,铝合金与涂层界面出现扩散层,提高了涂层的粘结性能。涂层表面的硬度达325 HV0.3,比铝合金硬度提高了3倍。所制备的涂层能有效提高铝合金的耐磨性,明显减少了铝合金表面的粘着和犁沟磨损,磨损量减少了60%。
In order to improve the wear resistance of aluminum alloy and prolong the service life of aluminum alloy products, 316L stainless steel coating was sprayed on the aluminum alloy by arc spraying, and then thermal diffused at 350 ℃ for 5h. The microstructure of the coating was analyzed by OM and SEM. The interface between the coating and the substrate was analyzed by EDX. The hardness of the coating was tested by Vickers hardness tester. The wear mechanism of the coating was also analyzed. The results show that the diffusion layer appears on the interface between the aluminum alloy and the coating after thermal diffusion treatment, which improves the bonding property of the coating. The coating surface hardness of 325 HV0.3, aluminum alloy hardness increased by 3 times. The prepared coating can effectively improve the wear resistance of the aluminum alloy, obviously reduce the adhesion of the aluminum alloy surface and furrow wear, and reduce the wear amount by 60%.