▎ 摘　　要

NOVELTY - Preparation of high strength die-cast aluminum alloy involves (A) using pure aluminum ingot, pure magnesium ingot, aluminum-20% silicon master alloy, aluminum-20% iron master alloy and aluminum-10% manganese master alloy, (B) weighing the raw materials, (C) putting pure aluminum ingot, pure magnesium ingot, aluminum-20% silicon master alloy, aluminum-20% iron master alloy and aluminum-10% manganese master alloy into a preheating furnace to preheat, removing moisture, (D) remelting the pure aluminum ingot, heating the furnace, (E) adding the preheated pure magnesium ingot, maintaining the temperature for 15-30 minutes, (F) adding the preheated aluminum-20% silicon master alloy, aluminum-20% iron master alloy and aluminum-10% manganese master alloy, (G) adding sodium-free refining agent for refining and purification, filtering the metal solution, (H) adding modifier, stirring the molten metal, (I) taking samples for testing, and (J) casting the molten metal. USE - Preparation of die-cast aluminum alloy (claimed). ADVANTAGE - The method produces die-cast aluminum alloy with high strength, tensile strength of 255 MPa, excellent die-casting performance, film-forming properties, and high yield. DETAILED DESCRIPTION - Preparation of high strength die-cast aluminum alloy which is capable of performing anodic oxidation and coloring involves (A) using pure aluminum ingot, pure magnesium ingot, aluminum-20% silicon master alloy, aluminum-20% iron master alloy and aluminum-10% manganese master alloy, (B) weighing the raw materials according to the weight percentage of the die-cast aluminum alloy components, (C) putting pure aluminum ingot, pure magnesium ingot, aluminum-20% silicon master alloy, aluminum-20% iron master alloy and aluminum-10% manganese master alloy into a preheating furnace to preheat to 150-200 degrees C, removing the moisture in the raw materials, (D) remelting the pure aluminum ingot, heating the furnace to 740-770 degrees C, until the pure aluminum ingot is completely melted, (E) adding the preheated pure magnesium ingot, maintaining the temperature for 15-30 minutes, until the pure magnesium ingot is completely melted, (F) adding the preheated aluminum-20% silicon master alloy, aluminum-20% iron master alloy and aluminum-10% manganese master alloy, maintaining for 35-40 minutes until all the master alloys are melted, (G) raising the temperature of the molten metal to 770 degrees C, adding sodium-free refining agent for refining and purification, filtering the metal solution to remove hydrogen, (H) raising the temperature of the molten metal to 780-800 degrees C, adding modifier, stirring the molten metal to completely melt the modifier uniformly, leaving the mixture for a period of time, (I) taking samples for testing, (J) casting the molten metal, when the components and contents tested in step (9) meet the ratio, and maintaining the temperature of the molten metal at 760-770 degrees C during casting. An INDEPENDENT CLAIM is included for die-cast aluminum alloy, which comprises 0.03-0.8 wt.% silicon (including 0.03-0.8), 0.05-2.0 wt.% iron (including 0.05-2.0), 0.2-3 wt.% (including 0.2-3), 0.2-6.0 wt.% (including 0.2-6), and balance aluminum.