Method for preparing medical spherical Co-Cr-Mo alloy particles

Abstract

The invention discloses a method for preparing medical spherical Co-Cr-Mo alloy particles. The method comprises the steps as follows: (1), a cylindrical metal electrode is prepared by alloy components in percentage by weight as follows: 27%-32% of Cr, 5%-7% of Mo, 0%-0.5% of Ni, 0%-0.2% of Fe, 0.26%-0.31% of C, 0.4%-0.65% of Si, 0%-0.5% of Mn, smaller than or equal to 0.1% of N, smaller than or equal to 0.2% of W, smaller than or equal to 0.005% of S, smaller than or equal to 0.01% of P, smaller than or equal to 0.1% of Ti, smaller than or equal to 0.01% of B, smaller than or equal to 0.1% of Al and the balance of Co; (2), the prepared metal electrode is horizontally mounted on an electrode swivel feeding mechanism of plasma rotating electrode powder preparation equipment; and (3), a plasma gun is started to generate electric arc, the electrode swivel feeding mechanism is started to enable the metal electrode to perform high-speed rotating feeding, end parts of the metal electrode are gradually molten by the high temperature generated by the electric arc, and a molten metal liquid is thrown away under the action of centrifugal force to form the spherical particles. The spherical Co-Cr-Mo alloy particles prepared with the method have good biological compatibility, a spherical particle coating is sintered on the prosthesis surface to form good biological mosaic, and the prosthesis is prevented from loosening and subsidence.

Description

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AI Technical Summary

Benefits of technology

This patented technology allows for better control over the properties of ceramic materials used during orthopedic procedures such as hip joint replacement or knee surgery. These improvements include improved strength without compromising their durability, reduced weight while maintaining flexibility, increased biocompatibility, enhanced lubricity when fixed into place, prevention from losing its shape due to movement after implantation, etc., resulting in longer lifespan and more effective treatment outcomes.

Problems solved by technology

The technical problem addressed by this patented method relates to making ceramics that resist corrosion or damage caused during surgery while also being easy to use with other metals like chrome. Current techniques involve create cylindrical powders from these metal compounds through various processes such as mills or ball grinding machines. These current methods require expensive equipment and time-consuming steps, leading to increased costs associated therewith.