Sodium-free refining agent used for smelting aluminum alloy

Abstract

The invention discloses a sodium-free refining agent used for smelting an aluminum alloy. The refining agent is prepared from the following raw materials including, by weight, 10-16 parts of calcium fluoride, 10-14 parts of potassium fluorosilicate, 10-14 parts of potassium fluotitanate, 8-12 parts of potassium chloride, 8-14 parts of lithium chloride, 8-14 parts of magnesium chloride, 6-10 partsof titanium dioxide and 3-5 parts of carbon powder. According to the refining agent, in the refining process, the hydrogen removing effect is remarkable, oxide impurities in melt can be removed fully,hot slag is recovered more conveniently, and the recovery rate is higher. Due to containing of titanium, a certain effect of refining the alloy is achieved. The refining agent does not contain sodiumsalt ingredients and has a good refining effect.

Description

technical field [0001] The invention relates to a sodium-free refining agent for aluminum alloy smelting and belongs to the technical field of aluminum alloy casting. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in industry, and has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. During the production of aluminum alloy, the hydrogen atoms in the solution will spontaneously form hydrogen gas, and the hydrogen gas and inclusions will form bubbles during the solidification of the aluminum alloy solution, causing defects in the aluminum alloy components. At present, the refining agents disclosed in my country generally contain one or more of sodium salts such as sodium chloride, sodium fluoroaluminate, sodium fluoride, sodium fluorosilicate, and sodium sulfate. Sodium is introduced into aluminum-magnesium, aluminum-copper, and aluminum-lithium alloys, r...

AI Technical Summary

Problems solved by technology

At present, the refining agents disclosed in my country generally contain one or more of sodium salts such as sodium chloride, sodium fluoroaluminate, sodium fluoride, sodium fluorosilicate, and sodium sulfate. Sodium is introduced into aluminum-magnesium, aluminum-copper, and aluminum-lithium alloys, resulting in the phenomenon of "sodium embrittlement"