Preparation process of high toughness magnesium alloy

The invention relates to a preparation process of a high toughness magnesium alloy and belongs to the field of metal materials. The process specifically comprises the following steps: (1) preheating amold to 100-400 DEG C; (2) pouring magnesium alloy melt into the preheated mold to condense the magnesium alloy, specifically, in the integral process, a rotary magnetic field can be applied at the same time, and the magnetic field strength is 0.5-5T; (3) insulating the condensed magnesium alloy at 390-420 DEG C for 6-48 h for solution treatment; and (4) quenching the magnesium alloy after solution treatment to obtain the high toughness magnesium alloy. According to the process method, the tissues and mechanical properties of the magnesium alloy are obviously improved by applying the rotary magnetic field and the solution treatment, the demand on actual applications is met, the process is simple, and actual applications are facilitated. The preparation process provided by the invention issuitable for relatively m