Bulk amorphous alloys (BMGs) have high strength, hardness and elastic deformation. These characteristics greatly improve the wear resistance of amorphous alloys. So amorphous alloys attract more and more attention in the field of wear resistance. Among them, fe-base amorphous alloy has been a hot spot in academic research and industrial application because of its low cost. However, bulk amorphous alloys have high brittleness at room temperature, and it is difficult to prepare large-scale amorphous alloys, which limits their wide application. In view of this, many researchers try to prepare amorphous coatings on crystalline substrate surface. The amorphous coating can not only inherit the high hardness and wear resistance of bulk amorphous alloy, but also solve the room temperature brittleness and size limitation. At present, thermal spray coating is the most popular technique to prepare amorphous coatings, especially plasma spraying and supersonic flame spraying. QIAO et al. prepared amorphous Fe Cr MoCSiCoAlY coating by plasma spraying, and found that the coating hardness was HV0.1884±61, and the wear resistance was better. JIANG et al. prepared Fe74Cr7Mo3Ni3Si2BP6C4 amorphous coating by plasma spraying, and found that the porosity of the coating decreased with the increase of Mo content.

Surface engineering technology is an important part of advanced manufacturing technology and also provides important technical support for manufacturing technology innovation. Surface technology on the surface of material surface protection, restoration and surface modification has distinctive advantages, such as thermal spraying technology is a kind of surface technology, with the continuous development of coating technology and coating materials, thermal spraying coating for its better than that of base material, expand the application range of materials, improve the service life of the parts, save the resources. In this paper, based on the actual parts on the surface of the insulation, wear resistance and impact resistance, thermal spraying technology was studied, the thermal spraying material and related auxiliary craft, with 45 steel as substrate material, choose the micron grade respectively Al_2O_3 ceramic powder and nylon 11 powder as the coating material, the explosion spraying process method, on the 45 steel substrate material specimen Al_2O_3 ceramic coatings, reunion Al_2O_3 ceramic coating was prepared, in addition, the preparation of nylon 11 bythermal spraying coating. The surface morphology, structure and particle size of the coating were examined by metallographic microscope. The phase structure of Al_2O_3 ceramic coating was determined by X-ray diffraction, and the crystallinity of nylon 11 coating was calculated.

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