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Cobalt-chromium-molybdenum alloy artificial joint implant material and preparation method thereof

A cobalt-chromium-molybdenum alloy and artificial joint technology, applied in the field of medical materials, can solve problems such as high brittleness, poor plasticity, and high hardness, and achieve high compressive strength, good toughness, and plasticity

Inactive Publication Date: 2018-01-16
PEKING UNION MEDICAL COLLEGE HOSPITAL CHINESE ACAD OF MEDICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inclusions have high hardness and high brittleness, which will also cause uneven stress distribution at the junction with the matrix, resulting in the occurrence of micro-cracks, providing a weak area for the destruction of the material, resulting in a relatively low content of cobalt-chromium-molybdenum-chromium in the alloy. High, brittle and hard, poor plasticity, difficult material processing, resulting in reduced plasticity, toughness and fatigue strength of cobalt-chromium-molybdenum alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Get the following raw materials according to the following weight percentages: C 0.4%, Cr 26%, Mo 9%, Al 0.7%, Fe 0.35%, Mn 0.5%, Si 0.65%, Nb 0.5%, Co balance, the The above ingredients are fully mixed;

[0021] (2) Put the metal material mixed in step (1) into a vacuum melting furnace, raise the temperature for vacuum melting, the heating rate is 35°C / min, first raise the vacuum melting temperature to 1020°C, melt for 2 hours, and then Keeping the heating rate unchanged, raise it to 1450°C, melt for 3 hours, heat-press it into an alloy ingot after vacuum melting, cool the alloy ingot, and the prepared cobalt-chromium-molybdenum-molybdenum alloy artificial joint implant material after cooling.

Embodiment 2

[0023] (1) Get the following raw materials according to the following weight percentages: C 0.5%, Cr 26%, Mo 9%, Al 0.75%, Fe 0.55%, Mn 0.4%, Si 0.75%, Nb 0.55%, Co balance, will The above ingredients are fully mixed;

[0024] (2) Put the metal material mixed in step (1) into a vacuum smelting furnace, raise the temperature for vacuum smelting, the heating rate is 40°C / min, first raise the vacuum melting temperature to 1030°C, and smelt for 2.5h, Then keep the heating rate unchanged and increase to 1650°C, smelt for 3 hours, hot-press into alloy ingot after vacuum melting, cool the alloy ingot, and the prepared cobalt-chromium-molybdenum alloy artificial joint implant material after cooling.

Embodiment 3

[0026] (1) Get the following raw materials according to the following weight percentages: C 0.6%, Cr 27%, Mo 10%, Al 0.8%, Fe 0.6%, Mn 0.6%, Si 0.85%, Nb 0.6%, Co balance, the The above ingredients are fully mixed;

[0027] (2) Put the metal material mixed in step (1) into a vacuum melting furnace, raise the temperature for vacuum melting, the heating rate is 45°C / min, first raise the vacuum melting temperature to 1040°C, melt for 2 hours, and then Keep the heating rate constant and increase to 1750°C, smelting for 2 hours, hot pressing into alloy ingots after vacuum melting, cooling the alloy ingots, and the prepared cobalt-chromium-molybdenum-molybdenum alloy artificial joint implant material after cooling.

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Abstract

The invention discloses a cobalt-chromium-molybdenum alloy artificial joint implant material, which comprises the following components in percentage by weight: 0.4 to 0.65% of C, 25 to 27% of Cr, 9 to10% of Mo, 0.7 to 0.85% of Al, 0.35 to 0.65% of Fe, 0.4 to 0.7% of Mn, 0.6 to 0.85% of Si, 0.5 to 0.75% of Nb, and the balance being Co. The prepared cobalt-chromium-molybdenum alloy artificial jointimplant material has the advantages of high hardness, good toughness, and good plasticity, has a higher compression strength, tensile strength, and anti-fatigue property, compared with a conventionalartificial joint implant material, and is suitable for preparing artificial joints, which have a long service life and are resistant to fracture and stress fatigue.

Description

technical field [0001] The invention relates to the field of medical materials, in particular to a cobalt-chromium-molybdenum alloy artificial joint implant material and a preparation method thereof. Background technique [0002] With the gradual increase of human aging, the number of middle-aged and elderly people suffering from hip and knee degenerative diseases is increasing year by year. According to statistics, there are as many as 65 million patients suffering from osteoarthritis in my country, the prevalence rate of people aged 40 is 10% to 17%, that of people over 65 years old is 60%, that of people over 75 years old is 80%, and the disability rate is as high as 53%. , that is, more than half of the patients may need artificial joint replacement surgery, and the onset tends to be younger. Therefore, higher requirements are put forward for the comprehensive performance and service life of artificial joint implant materials. [0003] Cobalt-chromium-molybdenum (CoCrMo)...

Claims

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Application Information

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IPC IPC(8): C22C19/07C22C1/02A61L27/04A61L27/50
Inventor 翁习生边焱焱彭慧明邹运
Owner PEKING UNION MEDICAL COLLEGE HOSPITAL CHINESE ACAD OF MEDICAL SCI
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