电弧喷涂制备涂层刀具工艺研究.docx

电弧喷涂制备涂层刀具工艺研究 摘要：本文用电弧喷涂技术在45号钢基体上制备涂层。采用实心丝材1Cr13作为燃烧丝，配合AL?O?陶瓷粉进行喷涂，制备金属基陶瓷复合涂层。采用正交试验方案，利用SEM对涂层的显微组织结构、性能进行了分析。复合涂层为典型的层状结构。影响涂层结合强度的工艺参数由主到次依次为喷涂电流、雾化空气压力、喷涂距离和喷涂电压；影响涂层显微硬度的工艺参数由主到次是喷涂电流、喷涂距离、喷涂电压、雾化空气压力。复合涂层的磨损机制主要为硬质颗粒的脆性脱落，同时伴随着磨粒磨损。在金属相涂层中添加硬质相能显著提高涂层显微硬度。关键词：电弧喷涂，涂层 ，组织，性能，工艺参数The arc spraying coating preparation tool technology was studiedAbstract: In this paper,coatings were sprayed on the substrate of steel 45 by arc spraying using optimized process parameter. Using a solid wire 1Cr13 as the burning of wire to meet the outgoing carry out AL?O? arc spraying ceramic powder to prepare metal matrix ceramic composite coatings.The scheme of the orthogonal experiment using SEM arc.sprayed coating microstructure on the organizational structure of the worn surface were analyzed. Microstructure of the composite coating showed a typical layered structure. Process parameters which effect the combining strength of the arc sprayed coating are (from main to minor in turns) spraying current, atomizing air pressure, spraying distance, and spraying voltage. Process parameters which effect the micro.hardness of the arc sprayed coating are (from main to minor in turns) spraying current, spraying distance, spraying voltage, atomizing air pressure.The wear mechanism of composite coating are mainly falls off the brittleness of hard particle, at the same time accompanied by abrasive wear.Hard phase is added in the metallic phase coating can significantly increase the coating micro hardness.KEY WORDS:arcs praying ,coatings,organization,performance,process parameters目录1 绪论11.1 热喷涂技术11.2 电弧喷涂21.2.1 电弧喷涂的原理及特点21.2.2 电弧喷涂涂层的形成过程31.2.3 涂层的结合机理51.2.4 电弧喷涂工艺过程和工艺参数51.3 电弧喷涂的发展趋势71.4 本课题研究意义及内容92 电弧喷涂涂层的制备及试验方法102.1 涂层的制备工艺102.1.1 电弧喷涂的设备102.1.2 喷涂工艺参数102.1.3 电弧喷涂材料112.2 电弧喷涂涂层表征仪器及实验方法112.2.1 电弧喷涂涂层检测仪器112.2.2 涂层硬度的测定122.2.3 涂层结合强度的检测122.2.4涂层磨损性能实验133 涂层组织结构的研究143.1 正交试验方案设计143.2 电弧喷涂工艺参数对涂层组织的影响153.2.1 喷涂电压对涂层组织的影响153.2.2 雾化空气压力对涂层组织的影响163.2.3 喷涂距离对涂层组织的影响183.2.4 喷涂电流对涂层组织的影响194