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A preparation method of medical cobalt-chromium-molybdenum alloy spherical particles

A technology of cobalt-chromium-molybdenum alloy and spherical particles, which is applied in the field of medical alloys, can solve problems such as difficult to meet the technical requirements of medical alloys, and achieve the effects of good biological compatibility, high hardness, and good wear resistance

Active Publication Date: 2017-03-08
BAOJI FEILI NONFERROUS METAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing methods for preparing spherical cobalt-chromium-molybdenum alloy particles are difficult to meet the technical requirements of medical alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: The preparation method of medical cobalt-chromium-molybdenum alloy spherical particles of -20+30 mesh comprises the following steps:

[0015] (1) Prepare a cylindrical metal electrode according to the following weight percentage alloy composition, Cr 29, Mo 7, Ni 0.5, Fe0.2, C 0.3, Si 0.6, Mn 0.5, N≤0.1, W≤0.2, S≤0.005, P≤0.01, Ti≤0.1, B≤0.01, Al≤0.1, the balance is Co;

[0016] (2) Install the prepared metal electrode horizontally on the electrode rotary feeding mechanism of the plasma rotary electrode powder making equipment;

[0017] (3) Vacuumize the vacuum furnace of the plasma rotating electrode powder making equipment and then fill it with helium, then start the plasma gun to generate an arc, and start the electrode rotary feeding mechanism at the same time to make the metal electrode rotate and feed at a high speed. The high temperature generated by the arc makes the metal The end of the electrode is gradually melted, and the molten metal liquid i...

Embodiment 2

[0024] Embodiment 2: The preparation method of medical cobalt-chromium-molybdenum alloy spherical particles of -35+40 mesh comprises the following steps:

[0025] (1) Prepare a cylindrical metal electrode according to the following weight percentage alloy composition, Cr 28, Mo 6, Ni 0.3, Fe0.1, C 0.28, Si 0.5, Mn 0.2, N≤0.1, W≤0.15, S≤0.005, P≤0.01, Ti≤0.1, B≤0.01, Al≤0.1, the balance is Co;

[0026] (2) Install the prepared metal electrode horizontally on the electrode rotary feeding mechanism of the plasma rotary electrode powder making equipment;

[0027] (3) Vacuumize the vacuum furnace of the plasma rotating electrode powder making equipment and then fill it with helium, then start the plasma gun to generate an arc, and start the electrode rotary feeding mechanism at the same time to make the metal electrode rotate and feed at a high speed. The high temperature generated by the arc makes the metal The end of the electrode is gradually melted, and the molten metal liquid...

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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

technical field [0001] The invention belongs to the technical field of medical alloys, and in particular relates to a preparation method of medical cobalt-chromium-molybdenum alloy spherical particles. Background technique [0002] Cobalt-chromium-molybdenum (CoCrMo) alloy spherical particles are used as sintered coating materials for implanted prostheses in the human body. They have the advantages of high hardness, good wear resistance, high finish, and long service life. In particular, the sintered cobalt-chromium-molybdenum alloy spherical particle coating on the surface of the prosthesis has good biological compatibility and can form a good biological mosaic, which is conducive to the ingrowth and fixation of new bone, and effectively prevents the loosening and sinking of the prosthesis . However, the existing methods for preparing spherical cobalt-chromium-molybdenum alloy particles are difficult to meet the technical requirements of medical alloys. Contents of the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/10C22C19/07
Inventor 汶志强刘志春
Owner BAOJI FEILI NONFERROUS METAL MATERIALS
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