Heterogeneous aluminum-magnesium alloy bar and preparation method thereof

• Main Authors: ZHAO YONGHAO, CAO YANG, SUN XINDA, NIE JINFENG, ZHOU HAO, LI YUSHENG
• Format: Patent
• Language: Chinese; English
• Published: 28.12.2021
• Subjects: CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; FORGE FURNACES; FORGING; HAMMERING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METALLURGY; PERFORMING OPERATIONS; PRESSING METAL; PUNCHING METAL; RIVETING; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a heterogeneous aluminum-magnesium alloy bar and a preparation method thereof. The preparation method comprises the following steps that (1) a plurality of magnesium alloy bars are uniformly inserted into a mold groove with a cylindrical cavity, (2) industrial pure aluminum is heated to 680-720 DEG C, then heat preservation is conducted for 15-30 min, the aluminum melt is poured into the cavity, the unoccupied part of the cavity is filled with the aluminum melt, air cooling is conducted until the room temperature, and a composite bar is obtained; (3) the as-cast composite bar is subjected to rotary swaging at the room temperature, rotary swaging is conducted for 10-30 passes, and the total strain of rotary swaging is smaller than 2; and (4) annealing is conducted. According to the heterogeneous aluminum-magnesium alloy bar and the preparation method thereof, metallurgical bonding of aluminum and magnesium is achieved through casting, small total strain can be selected in subsequent rot