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There Are Many Factors That Affect The Quality Of Engine Parts
Sep 14, 2017

There are many factors that affect the quality of Engine Parts
The first is the design of Engine Parts. In addition to the design according to the working conditions and metal material properties to determine the Engine Parts geometry, size, but also from the casting alloy and casting process characteristics to consider the design of the rationality, that is, the size effect and solidification, Shrinkage, stress and other issues, in order to avoid or reduce the composition of Engine Parts segregation, deformation, cracking and other defects.
The second must have a reasonable casting process. That is, according to Engine Parts structure, weight and size, casting alloy characteristics and production conditions, select the appropriate parting surface and shape, core method, a reasonable set of casting tendons, cold iron, riser and pouring system. To ensure access to high quality Engine Parts.
The third is the quality of raw materials for casting. Metal parts, refractories, fuels, fluxes, modifiers and foundry sand, sand binder, paint and other materials, substandard quality, will Engine Parts produce pores, pinholes, slag, sticky sand and other defects, affecting Engine Parts Appearance quality and internal quality, serious will make Engine Parts scrapped. The fourth is the process operation, to develop a reasonable process of operation procedures to improve the technical level of workers, so that the correct implementation of the rules.
Manufacturing production, to the quality of Engine Parts to control and test. First of all to develop from the raw materials, auxiliary materials to each specific product control and inspection of the code and technical conditions. For each process are strictly in accordance with the code of practice and technical conditions for control and testing. Finally, the finished product Engine for quality inspection. To be equipped with a reasonable detection method and the appropriate detection staff. Generally, the appearance quality of the professional Engine Parts can be used to determine the surface roughness of the Engine Parts. The fine cracks on the surface can be checked by the color method and the magnetic powder method.
Engine Parts is a carbon-containing alloy with a carbon content of up to 2% (mass fraction). The carbon in the material has only a small amount of carbon and the solid solution is formed in the form of graphite or cementite. As the graphite decreases the precipitation potential of hydrogen, Thus hindering the deposition of zinc.
At the same time as the surface of the material is too rough, covering the trachoma and shrinkage, the composition contains phosphorus, sulfur, silicon, graphite and titanium and other elements, resulting in electroplating process hydrogen over-potential is too low, easily lead to hydrogen evolution, Metal deposition is difficult; and pickling will increase the adsorption of hydrogen atoms, the adsorption of hydrogen atoms in addition to part of the combined into the hydrogen emissions to the air, there will be a considerable part of the hydrogen atoms to the cast iron matrix diffusion, resulting in more Many of the hydrogen pressure, not only will affect the mechanical properties of Engine Parts itself, in the electroplating process will also cause a lot of hydrogen, not only seriously affect the coating fastness, but also cause the current efficiency drastic decline, further increase the difficulty of plating The
 The quality of the Engine Parts includes the appearance quality, intrinsic quality and quality of use. Appearance quality refers to the chemical composition, physical properties, mechanical properties, microstructure of the engine Parts, and holes and cracks present in the Engine Parts. The internal properties of the engine parts are the surface roughness, surface defects, size deviation, shape deviation and weight deviation. The use of quality refers to the work of copper under different conditions in the durability of the work, including wear, corrosion resistance, resistance to cold heat, fatigue, shock absorption and other properties and cutting, weldability and other technology performance.
Engine Parts due to a variety of factors, often appear stomata, pinholes, slag, cracks, pits and other defects. Commonly used repair equipment for the argon arc welding machine, resistance welding machine, cold welding machine. For the quality and appearance of the requirements of the Engine Parts defects can not use argon arc welding machine and other large heat, fast welding machine to repair.
Engine Parts quality has a significant impact on the performance of mechanical products. For example, the machine Tool Parts of the wear resistance and dimensional stability, a direct impact on the accuracy of the machine to maintain life; various types of pump impeller, shell and hydraulic parts of the cavity size, profile accuracy and surface roughness, direct impact Pump and hydraulic system work efficiency, energy consumption and the development of cavitation; internal combustion engine cylinder, cylinder head, cylinder, piston ring, exhaust pipe and other pieces of copper strength and resistance to cold heat, directly affect the engine Working life.