A method for casting high-quality aluminum parts using aluminum-silicon piston chips

Abstract

The invention discloses a method for casting a high-quality aluminum part through chips of aluminum-silicon pistons. The method includes the following steps that firstly, embracing and fusion are performed, wherein the machined chips of the aluminum-silicon pistons are recycled, dried and magnetically separated and are then added to a natural gas reverberatory furnace so as to be embraced and fused; secondly, high-temperature standing is performed, wherein the temperature of the natural gas reverberatory furnace is increased to 850 DEG C to 930 DEG C and kept for 50 min to 90 min, and molten aluminum is generated; thirdly, component detection is performed, wherein after slag of the molten aluminum is filtered out, magnesium is pressed to the bottom of the molten aluminum, after the molten aluminum stands still for 5 min to 9 min, a sample is obtained and analyzed, and the molten aluminum is adjusted till the content of each component in the molten aluminum meets the requirement; fourthly, refining and metamorphism are performed, wherein refining is performed before metamorphism; and fifthly, the aluminum part is cast, wherein when the temperature of the refined and metamorphosed molten aluminum ranges from 750 DEG C to 790 DEG C, the molten aluminum is treated through a degassing machine, stands still and is cast into the aluminum part. By the adoption of the method, complex equipment does not need to be invested, operation is easy, secondary aluminum burning losses can be reduced, energy is saved, consumption is reduced, the casting cost of the aluminum part is reduced, the waste aluminum chips are recycled, and the method is suitable for industrial large-scale production.

Description

technical field [0001] The invention belongs to the technical field of waste aluminum recycling, and in particular relates to a method for casting high-quality aluminum parts by using aluminum-silicon piston chips. Background technique [0002] Aluminum-silicon alloy, also known as "silicon-aluminum alloy" or "silicon-aluminum alloy", has good casting performance and wear resistance, and a small thermal expansion coefficient. It is the alloy with the most varieties and the largest amount of casting aluminum alloys. The silicon content is between 4% to 13%. Sometimes 0.2% to 0.6% magnesium is added, and it is widely used in structural parts, such as shells, cylinders, boxes and frames. Sometimes adding an appropriate amount of copper and magnesium can improve the mechanical properties and heat resistance of the alloy, which is widely used in the manufacture of pistons and other components. [0003] The aluminum chips produced after the piston is mechanically processed conta...

AI Technical Summary

Problems solved by technology

However, in the above-mentioned disclosed patents, when the waste aluminum chips are cleaned with clear water, the aluminum chips in the backlog process are rapidly oxidized and corroded, which will cause waste of raw materials.

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