Aluminum alloy vacuum standing, gas removal and smelting device

Abstract

The invention discloses an aluminum alloy vacuum standing, gas removal and smelting device. The aluminum alloy vacuum standing, gas removal and smelting device mainly comprises a smelting furnace body consisting of a main furnace body and a vacuum cover which is matched with the main furnace body; and a gas extraction pipe is arranged on the smelting furnace body, one end of the gas extraction pipe is positioned in the vacuum cover, the other end of the gas extraction pipe is connected with a cooling pipe, and is connected with one end of the cooling pipe through a vacuum quick release flange, and the other end of the cooling pipe is connected with a vacuumizing pump. Before casting, the vacuumizing pump is started to vacuumize the furnace body, hydrogen partial pressure in a furnace cavity is reduced, and hydrogen is continuously separated out, so the hydrogen content of melt is reduced, and vacuum is removed for casting. After the gas of the aluminum alloy melt is removed, the tendency for absorbing hydrogen is low, so after casting, the smelt can keep low hydrogen content, and the defect of hole cannot be generated easily. The aluminum alloy vacuum standing, gas removal and smelting device has a simple structure and a good hydrogen removal effect, is easy to operate, and is suitable for producing an aluminum alloy casting of which holes are easily generated, or which has the high requirement of gas tightness.

Description

a technical field [0001] The invention relates to an aluminum alloy vacuum static degassing smelting device. Two background technology [0002] Aluminum alloy has the advantages of low density, high specific strength, and easy forming, and is widely used in aerospace, transportation, machinery and other fields. In the process of aluminum alloy production, especially in the process of aluminum ingot preparation and casting manufacturing, a large number of hole defects will occur, resulting in the performance of aluminum ingots or aluminum alloy castings, especially the mechanical properties, which will be greatly reduced or even scrapped, resulting in low yield and energy waste. Big. Studies have shown that the main cause of aluminum alloy pores is the presence of hydrogen and oxide inclusions in the melt. The solubility of hydrogen in solid aluminum is very small, but the solubility in liquid aluminum is very high, so that hydrogen accumulates in a large amount at the fron...

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Problems solved by technology

[0004] In order to overcome the defects of low efficiency and unstable effect in traditional melt purification, the present invention provides a vacuum static degassing smelting device for aluminum alloy, which performs vacuum static degassing through a non-adsorption purification method based on Henry's law, and realizes The device design for the integration of aluminum alloy smelting and degassing

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