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Production method of CoCrMo alloy for artificial joints

A technology for artificial joints and production methods, which is applied to the improvement of process efficiency, tissue regeneration, medical science and other directions, can solve the problems of successful forging without CoCrMo alloy ingots, and achieve the effect of improving production yield and high purity

Inactive Publication Date: 2019-08-16
KAILI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there have been no reports of successful forging of CoCrMo alloy ingots in China before.

Method used

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  • Production method of CoCrMo alloy for artificial joints
  • Production method of CoCrMo alloy for artificial joints

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] In the present embodiment, the production method of CoCrMo alloy for artificial joint comprises the following steps:

[0040] 1) Use a pollution-free crucible for vacuum induction furnace melting;

[0041] 2) When selecting materials, metal cobalt (Co99.8wt%), metal chromium (Cr99.95wt%), Mo-1 metal molybdenum and other raw materials in GB / T3462 are used for smelting; vacuumize the combined furnace to 15Pa and start sending Power smelting, keep the vacuum at 25Pa during the smelting process, quickly increase the power to clear after the material turns red, and then maintain this high power to increase the temperature of the molten pool;

[0042] 3) Refining starts when the temperature of the molten pool reaches 1600°C, the refining time is 20min, and the vacuum degree during refining is 15Pa; after that, the nitrogen filling operation is carried out, the nitrogen filling pressure is 54KPa, the nitrogen filling time is 12min, and the nitrogen content is 0.10wt %;

[0043...

Embodiment 2

[0049] In the present embodiment, the production method of CoCrMo alloy for artificial joint comprises the following steps:

[0050] 1) Use a pollution-free crucible for vacuum induction furnace melting;

[0051] 2) When selecting materials, metal cobalt (Co99.8wt%), metal chromium (Cr99.95wt%), Mo-1 metal molybdenum and other raw materials in GB / T3462 are used for smelting; vacuumize the combined furnace to 14Pa and start sending Power smelting, keep the vacuum at 24Pa during the smelting process, quickly increase the power to clear after the material turns red, and then maintain this high power to increase the temperature of the molten pool;

[0052] 3) Refining starts when the temperature of the molten pool reaches 1600°C, the refining time is 30min, and the vacuum degree during refining is 14Pa; after that, the nitrogen filling operation is carried out, the nitrogen filling pressure is 54KPa, the nitrogen filling time is 18min, and the nitrogen content is 0.18wt %;

[00...

Embodiment 3

[0059] In the present embodiment, the production method of CoCrMo alloy for artificial joint comprises the following steps:

[0060] 1) Use a pollution-free crucible for vacuum induction furnace melting;

[0061] 2) When selecting materials, metal cobalt (Co99.8wt%), metal chromium (Cr99.95wt%), Mo-1 metal molybdenum and other raw materials in GB / T3462 are used for smelting; vacuumize the combined furnace to 13Pa and start sending Power smelting, keep the vacuum at 23Pa during the smelting process, quickly increase the power to clear after the material turns red, and then maintain this high power to increase the temperature of the molten pool;

[0062] 3) Refining starts when the temperature of the molten pool reaches 1600°C, the refining time is 25min, and the vacuum degree during refining is 13Pa; after that, the nitrogen filling operation is carried out, the nitrogen filling pressure is 54KPa, the nitrogen filling time is 14min, and the nitrogen content is 0.14wt %;

[00...

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Abstract

The invention relates to the field of cobalt-base alloys, in particular to a production method of a CoCrMo alloy for artificial joints. According to the method, at first, a forged blank is obtained bymeans of vacuum induction furnace smelting and electroslag remelting; then the blank is heated to 1150 DEG C-1250 DEG C for heat preserving, and then forging is carried out; in the forging process, the temperature of the blank is strictly controlled within a certain temperature range, the temperature preserved for the final heating number is 1150 DEG C, the temperature for final forging of each heating number is no lower than 1000 DEG C, and thus it is guaranteed that the CoCrMo forged blank is always in a good plastic processing state; and after forging, diffusion annealing treatment is carried out, and the annealing temperature ranges from 1000 DEG C to 1050 DEG C. According to the production method, the qualified CoCrMo forged blank is obtained through the production method, qualifiedraw materials are provided for manufacturing the artificial joint parts, the most important link for obtaining the raw materials of the qualified CoCrMo artificial joint parts is forging, and strict control over the temperature for initial forging and final forging is the most key part for ensuring that the high-quality products are obtained and the production yield is increased.

Description

technical field [0001] The invention relates to the field of cobalt-based alloys, in particular to a production method of a CoCrMo alloy for artificial joints. Background technique [0002] Cobalt-based alloys have excellent high temperature performance, excellent heat strength, corrosion resistance, and outstanding scratch resistance. Therefore, cobalt-based alloys are widely used in aviation, aerospace, nuclear engineering, energy power, transportation, petrochemical, metallurgy, medicine and other fields. Cobalt-based alloys used in medicine usually refer to cobalt-chromium alloys. In foreign countries, cobalt-based alloys are widely used in artificial joints. Among them, forged cobalt-chromium-molybdenum alloys (adding molybdenum to cobalt-chromium alloys) have been widely used in the manufacture of human body Implanted in bone. In addition to: 1) non-toxic and side effects; 2) good biocompatibility; 3) high strength; 4) good stability and reliability, and 5) excellent...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22B9/18C22C19/07C22F1/10A61L27/04
CPCA61L27/045A61L2430/24C22B9/18C22C1/02C22C19/07C22F1/10Y02P10/25
Inventor 王雷
Owner KAILI UNIV
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