Common Rail Fuel Injection System Monomer Pump Specimen Surface Coating Technology Research

Common Rail Fuel Injection System monomer pump is a key engine components, engine work process, the monomer pump at the surface temperature, high-pressure, easy to wear, a surface coating solutions monomer pump surface wear resistance, high temperature , anti-corrosion problem is the key to improve the life of the engine.××paper in accordance with the needs of users in the common rail fuel injection system pump monomer on the surface of specimen preparation ofα-Al₂O₃ rigid thin-film technology research.Al₂O₃ films at home and abroad in recent years on a more extensive film superhard materials, owing to the high temperature (up to 800℃temperature, or even 1000℃), corrosion resistance, high hardness and high mechanical strength and other properties, As a result of its broad application areas and market prospects.In recent years, with the rapid development of industrial machinery, the high temperature properties of Al₂O₃ films and high hardness of the growing high-performance requirements, Al₂O₃films thermal stability and high hardness become a hot research. In this paper, using the magnetron sputtering method of the rigid Al₂O₃ films, and characterized by a series of studied by means of rigid Al₂O₃ films thermal stability and hardness. Preparation of the magnetron sputtering method in the process of Al₂O₃ films, different preparation conditions would make membrane properties of the microstructure of a difference. In this paper are: magnetron sputtering method of Al₂O₃ films, select certain vacuum, temperature, evaporation of voltage, current, as well as oxygen and argon gas, the ratio of the microscopic structure can be prepared by a relatively good performance hard Al₂O₃ Films.Studies and analyses indicate that: Al₂O₃ films in the calcination temperature is less than 1000℃, phase composition is the same, respectivelyβ- AlOOH (400℃),γ- Al₂O₃ (400 1000℃), when the calcination temperature reaches 1150℃, Al₂O₃ films are composed of theα-phase Al₂O₃. 500℃and 1000℃no apparent between the thermal changes in the 1150℃above, pure Al₂O₃ films in the phase transition (γ- Al₂O₃ to the change ofα-Al₂O₃). Al₂O₃ films by the Al-O network posed. Al₂O₃ films in high temperature resulting in the microscopic structure of a good performance.α- Al₂O₃with high hardness. Therefore, the purpose of this paper is to study in the common rail fuel supply pump system monomer on the surface ofα- Al₂O₃ rigid film. Common rail fuel supply system to pump monomer surface wear resistance, high temperature resistant, anti-corrosion, and to enhance common rail fuel supply system monomer pump life.