Smelting method for Al-Mg-Mn-Cu-Ti aluminum alloy

Abstract

The invention discloses a smelting method for an Al-Mg-Mn-Cu-Ti aluminum alloy. The smelting method comprises the following steps of (1) preparing before smelting; (2) batching; (3) smelting, namely preheating a cast iron crucible furnace, and adding a covering agent; adding partial raw materials into a cast iron crucible after the covering agent is completely dissolved, and increasing the temperature and adding pure Mn ingots after the raw materials are completely smelted; continuously stirring and gradually increasing the temperature after the pure Mn ingots are smelted, slagging off, transferring melt to a graphite crucible heat preserving furnace, sampling and performing stokehole chemical component analysis; (4) preserving the heat and refining; namely adjusting the components of the melt, controlling the temperature of the furnace, pressing a refining agent into an aluminum alloy melt, degassing and refining; and (5) casting, namely covering a coating agent without magnesium on the surface of the aluminum alloy melt, slagging off after standing, and finally casting. The Al-Mg-Mn-Cu-Ti aluminum alloy produced by the smelting method has the advantages of less casting defects, high yield, low content of impurities of produced products, and good mechanical performance.

Description

technical field [0001] The invention belongs to the field of aluminum alloy material manufacturing, and in particular relates to a method for melting an Al-Mg-Mn-Cu-Ti aluminum alloy. Background technique [0002] Aluminum alloy materials are widely used in industries such as aviation, aerospace, ships, building materials, home appliances, telecommunications, and power cables because of their low density, high specific strength, good electrical conductivity, and large reserves, and play an important role. . Al-Mg-Mn-Cu-Ti aluminum alloy is a kind of corrosion-resistant aluminum alloy widely used in the shipbuilding industry, and its corrosion resistance is good. Since the Al-Mg-Mn-Cu-Ti aluminum alloy belongs to the Al-Mg series aluminum alloy, its casting performance is easily affected by impurity elements; The tendency is large, and elements such as Al and Mg are easily oxidized to form inclusions, so the casting performance of Al-Mg aluminum alloys is poor; affect the ...

AI Technical Summary

Problems solved by technology

However, the existing Al-Mg-Mn-Cu-Ti aluminum alloy smelting process often cannot well control the amount of impurity elements brought into the smelting process, the yield of the smelting process is not high, and the mechanical properties of the produced products are poor.