Toughening and deformation processing method of magnesium alloy

Abstract

The invention discloses a toughening and deformation processing method of a magnesium alloy, which performs toughening and deformation processing on a melted and homogenized magnesium alloy billet. The method is combined by any more than two methods of metal plastic deformation processing methods containing forging deformation processing, extruding deformation processing, rolling deformation processing and stamping deformation processing, a latter deformation processing method is carried out on the magnesium alloy directly after the former deformation processing method or after the magnesium alloy is split when the former deformation processing method is finished, heating is not carried out between the two deformation processing methods, the magnesium alloy material after deformation processing is immediately subjected to water spray cooling or blow cooling when the last deformation processing method is finished, and the cooled magnesium alloy material is performed with aging heat treatment. The method in the invention can obviously and evenly refine the interior textures of the magnesium alloy material, improve the mechanical property and uniformity of the magnesium alloy material, avoid texture coarsening of a magnesium alloy deformation workpiece in reheating and heat insulation processes, and save energy.

Description

technical field [0001] The invention relates to a strengthening and toughening deformation processing method of a magnesium alloy, which belongs to the field of metal materials. Background technique [0002] Magnesium alloy has very significant advantages in many occasions due to its low density (it is the smallest density among practical structural metals). Especially in aviation, aerospace, and automobiles, motorcycles, high-speed / light rail trains and other transportation vehicles, it has irreplaceable advantages. The low density of the components can save energy, and it also has the advantage of small inertia in the case of high-speed movement, which has a significant effect on the starting and braking of vehicles. These applications have very high requirements on the mechanical properties and uniformity of properties of magnesium alloy materials. The strength, toughness, fatigue resistance and other mechanical properties of magnesium alloy materials are strongly depen...

AI Technical Summary

Problems solved by technology

[0006] For example, in the rolling deformation processing of conventional magnesium alloy materials, if the rolling deformation degree is too large, cracking of the rolled piece will easily occur; if the rolling deformation degree is small, the internal structure is difficult to be fully uniform and refined, and the mechanical properties of rolling are not good. High; and also due to the uneven flow of metal during the rolling process, the structure and mechanical properties of the head and tail of the rolled product and in all directions are uneven and inconsistent

[0007] For example, the stamping and deformation processing of conventional magnesium alloy materials basically uses magnesium alloy sheets as raw materials, heats them to the temperature required for stamping deformation processing, and then heats them for a certain period of time before performing stamping deformation processing. During the heat preservation process, there will be a certain degree of coarsening, which will reduce its plasticity, which will lead to cracking and reduce the yield during the stamping deformation process.

[0008] In short, the current deformation processing method of magnesium alloy is difficult to achieve smooth deformation processing, that is, no defects such as cracks occur in the deformed parts, and at the same time, it can also make the structure of the deformed magnesium alloy material uniform and refined, and improve the mechanical properties of the magnesium alloy material and the uniformity of performance.