Al-Mg-Si alloy melt purification and grain refinement method

• Main Authors: YAMAIZUMI, HUANG XIEDONG, FU HAO, CHEN PENG
• Format: Patent
• Language: Chinese; English
• Published: 02.07.2024
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses an Al-Mg-Si alloy melt purification and grain refinement method, and belongs to the technical field of aluminum alloy melt purification. The aluminum alloy melt purification and grain refinement method comprises the following steps: preparing a refining agent, namely uniformly mixing KCl, MgCl2, K2TiF6 and B2O3 according to a certain proportion; drying to remove moisture; the aluminum alloy raw materials are smelted in a medium-frequency induction furnace; adding a prepared refining agent into the melt for refining; and dross on the surface of the melt is removed, and then the aluminum melt is poured into a mold to be cooled. KCl and MgCl2 are adopted as basic refining agents, the melting point and the use amount of the refining agents can be reduced, and no harmful gas is generated. The K2TiF6 can effectively strip aluminum oxide in the melt and remove harmful elements such as Fe, the B2O3 can remove harmful gas in the aluminum melt and can react with the K2TiF6 to generate TiB2 parti