Aluminum-silicon alloy with high wear resistance, high strength and toughness and preparation method of aluminum-silicon alloy

• Main Authors: WANG WANLIN, LIU YUQUAN, GAN PEIYUAN, XIE JIAHAO, HE YUSONG, HUANG DAOYUAN, ZENG JIE, PENG JIANFEI, WEI DESHI
• Format: Patent
• Language: Chinese; English
• Published: 04.10.2022
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention provides an aluminum-silicon alloy with high wear resistance and high strength and toughness and a preparation method thereof, the aluminum-silicon alloy comprises the following components in percentage by mass: 15-20% of Si, 4.0-5.5% of Cu, 0.5-1.5% of Mg, 0.6-2.0% of Fe, 0.3-1.0% of Mn, 0.3-1.5% of rare earth element, the rare earth element is selected from Ce and/or La, and the balance is aluminum and inevitable impurities. The preparation method comprises the following steps: putting a melt obtained by smelting raw materials on a permanent magnetic stirring device, and carrying out permanent magnetic stirring treatment on the melt until the melt is completely solidified, thereby obtaining the aluminum-silicon alloy. According to the invention, the solidification structure of the alloy is regulated and controlled by adjusting the ratio of elements in the alloy and adopting a rare earth modification coupling unique magnetic field stirring technology, so that the problem of coarse precipitated