Sodium-free refining agent for smelting aluminum alloy and preparation method thereof

Abstract

The invention discloses a sodium-free refining agent for aluminum alloy smelting and a preparation method thereof. The refining agent is prepared from the following raw materials in parts by weight: 15-20 parts of potassium fluorosilicate, 8-12 parts of potassium chloride, 10‑16 parts of aluminum fluoride, 8‑14 parts of magnesium chloride, 12‑18 parts of calcium fluoride, 18‑24 parts of potassium fluotitanate, 10‑14 parts of potassium fluoborate, 6‑10 parts of titanium dioxide, 4‑10 parts of potassium nitrate parts, 3‑5 parts of toner. The preparation method is as follows: (1) fully mix and stir each component of the formula amount, carry out crushing treatment, and pass through a sieve of 80-100 mesh, (2) put the mixture obtained in step (1) into a crucible, heat and melt to remove crystal water , the heating temperature is 80-100°C, the heating time is 2-2.5 hours, and then kept for 50-60 minutes, (3) the product obtained in step (2) is cooled to 40-45°C, and the obtained granular mixture It is the refining agent, and (4) is packed in a waterproof plastic bag. The refining agent of the invention can serve the refining purpose of removing slag and degassing, does not contain sodium salt components, and has good refining effect.

Description

technical field [0001] The invention relates to a sodium-free refining agent for aluminum alloy smelting and a preparation method thereof, belonging 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...

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"