The invention discloses a low-pressure casting process of an aluminum alloy steering joint. The process comprises the following steps: (A) a material is selected and prepared (A356 alloy is adopted; Sr with the mass percentage of 0.04-0.05% by the total quantity of alloy liquid is added to deteriorate molten aluminum so as to refine grains in the crystallization of the molten aluminum); (B) a product is cast by a low-pressure casting mold through the steps of descending of a filter screen, mold closing, liquid rising, mold filling, pressure keeping, opening of water cooling, pressure unloading, closing of water cooling, opening of an upper mold, ejection and part taking. The process mainly solves such problems as high equipment tonnage, complex procedures in manufacturing process and high material cost of a conventional aluminum alloy steering joint casting method, can produce casting products accordant with the requirements without needing expensive investment, is high in structure compactness of castings, is high in casting quality, and is high in production efficiency. Meanwhile, the molten metal is high in utilization rate; and the consumption of auxiliary materials is less.
Low-pressure casting process of aluminum alloy steering joint
2015-07-01
Patent
Elektronische Ressource
Englisch
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