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Performance and casting requirements of cast aluminum parts


Cast aluminum parts in the production process of its low processing cost and good process performance, during the operation of its remelting save resources and energy, so the application and development of this material is durable, cast aluminum parts in a wide range of advanced liquid iron desulfurization and filtration technology, thin-walled high-strength cast iron manufacturing technology.

Cast aluminum casting light alloy, due to its small density, high specific strength and corrosion resistance and other excellent characteristics, will be widely used in aviation, aerospace, automotive, machinery and other industries.Especially in the automobile industry, in order to reduce the utilization rate of fuel consumption, it is a long-term development trend to replace steel and iron castings with aluminum and nickel alloy castings.

In order to further improve the material performance and maximize the potential of the material, aluminum alloy materials, especially aluminum matrix composites, can be developed during operation, so as to meet the performance requirements of different working conditions to a certain extent.

During the forming process of casting aluminum parts, internal defects such as porosity, shrinkage hole and porosity are easy to occur. After machining, the surface dense layer parts of the castings with defects are removed and the internal tissue defects are exposed.For auto cast aluminum with sealing requirements, such as cylinder block, cylinder head, intake manifold, brake valve, etc., when the pressure seal test, the existence of defects microporous will lead to the leakage of sealing medium caused a large amount of waste, and these defects are often machining, could be detected by the pressure test after causing serious wave of working hours, materials and energy.

Cast aluminum in order to be able to effectively solve the above situation, in the process of production is mainly to take the treatment measures, the current use of common technology is infiltration treatment, that is, plugging.The so-called "infiltration", is under the conditions of infiltration agent infiltration into the micro-pores of aluminum casting, after the solidification of the infiltration into the pores of the filler and the inner wall of the casting pores into a whole, through the micro-hole, so that the parts can meet the pressure, seepage and leakage prevention and other conditions of the process.