Aluminum-silicon-magnesium casting aluminum alloy and method for manufacturing same

• Main Authors: AN XINBO, YU CHAOYANG, SHEN HONGLIN
• Format: Patent
• Language: Chinese; English
• Published: 06.02.2013
• Subjects: ALLOYS; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention provides aluminum-silicon-magnesium casting aluminum alloy and a method for manufacturing the same, and belongs to the technical field of aluminum alloy materials. The aluminum alloy comprises, by mass, from 6.8% to 7.2% of Si, from 0.8% to 1.1% of Mg, from 0.45% to 0.6% of Fe, lower than or equal to 0.05% of Cu, lower than or equal to 0.07% of Zn, from 0.25% to 0.45% of Mn, from 0.1% to 0.15% of Sb, from 0.12% to 0.16% of Ti, lower than or equal to 0.03% of each single impurity element in other impurity elements, lower than or equal to 0.1% of total impurity elements and the balance aluminum. The invention further provides the method for manufacturing the aluminum-silicon-magnesium casting aluminum alloy. The aluminum-silicon-magnesium casting aluminum alloy is high in mechanical property, the tensile strength reaches 300-330MPa, the elongation percentage is 1%, the yield strength RP (rapid prototyping) 0.2% can reach 249-270MPa, and the requirement on the mechanical property under a high-tempe