Large medical apparatus aluminium alloy casting stable filling method

Abstract

The invention discloses a steady filling method for an aluminum-alloy cast of a large medical apparatus, the method includes carrying out pouring in a pouring gate system and arranging a filter which plays the roles of baffling slag and cushion at the inlet of a transverse pouring gate in the pouring system; the pouring time is 58 seconds and the pouring temperature is 725 DEG C. The method leads the aluminum-alloy cast to be steadily filled and reduces the oxide inclusion.

Description

Technical field: [0001] The invention relates to a mold filling method for aluminum alloy castings. Background technique: [0002] Large-scale aluminum alloy castings are prone to defects such as secondary oxidation inclusions during the pouring process, resulting in scrapping. Therefore, how to achieve smooth forming of aluminum alloy and reduce secondary oxidation inclusions is a key issue in aluminum alloy casting technology. [0003] When the pouring time is too short, the pouring speed is fast, which will cause the mold filling to be unstable, resulting in air entrainment and turbulent flow, resulting in secondary oxidation inclusion defects. The aluminum liquid coming down from the sprue is relatively fast, and it will turn suddenly when it reaches the bottom of the sprue, which is very easy to generate turbulence and air entrainment. Excessively high pouring temperature will seriously oxidize the molten aluminum, and oxides will be produced before pouring, forming o...

AI Technical Summary

Problems solved by technology

[0003] When the pouring time is too short, the pouring speed is fast, which will cause the filling to be unstable, resulting in the appearance of air entrainment and turbulent flow, resulting in the occurrence of secondary

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