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Abstract

The present application relates to the technical field of material processing, and especially relates to a method for preparing a magnesium alloy bone screw bar via room-temperature rotary forging under alternating magnetic field in conjunction with cryogenic processing and a magnesium alloy bone screw product. The method specifically comprises the following steps: preparing an ingot, extruding the ingot into a magnesium-zinc-manganese alloy bar, performing room-temperature rotary forging under alternating magnetic field for plastic deformation, wherein the strength and hardness of the magnesium-zinc-manganese alloy are improved by the work hardening effect of magnesium alloy at room temperature, and meanwhile the microstructure is regulated; additionally, via the former and later cryogenic processing, the grain size and grain orientation uniformity can be effectively regulated in the magnesium alloy microstructure, and the magnesium alloy is effectively improved in plastic deformation ability, strength and corrosion resistance, and finally a magnesium alloy bone screw bar is obtained with excellent comprehensive properties in mechanical properties, corrosion resistance and biocompatibility, which can be mechanically processed into a magnesium alloy bone screw product.

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First Claim