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Medical fully-austenitic cobalt-chromium-molybdenum alloy and preparation method and application thereof

A cobalt-chromium-molybdenum alloy and full austenitic technology is applied in the field of medical full austenitic cobalt-chromium-molybdenum alloy and its preparation. High strength, reducing the difficulty of alloy deformation, and the effect of good elongation

Active Publication Date: 2016-10-12
METALINK SPECIAL ALLOYS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The martensite structure with hexagonal close-packed structure has very few slip systems and poor plasticity, which makes it extremely difficult to deform the cobalt-chromium-molybdenum alloy

Method used

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  • Medical fully-austenitic cobalt-chromium-molybdenum alloy and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0019] Melt the following components at 1490°C to obtain a liquid alloy, solidify and cool to 1050°C for 3 hours to obtain an ingot, and air-cool to obtain a fully austenitic cobalt-chromium-molybdenum alloy.

[0020] The content of components is as follows: 29kg of chromium; 6kg of molybdenum; 0.08kg of nitrogen; 64.92kg of cobalt;

Embodiment 2

[0022] Melt the following components at 1530°C to obtain a liquid alloy, solidify and cool to 1200°C for 2.7 hours to obtain an ingot, and obtain a fully austenitic cobalt-chromium-molybdenum alloy after air cooling.

[0023] The content of the components is as follows: 29kg of chromium; 6kg of molybdenum; 0.14kg of nitrogen; 64.86kg of cobalt;

Embodiment 3

[0025] The liquid alloy is obtained by smelting the following components at 1600°C, solidified and cooled to 1200°C for 2.5 hours to obtain an ingot, and after air cooling, a fully austenitic cobalt-chromium-molybdenum alloy is obtained; the total weight of the full-austenitic cobalt-chromium-molybdenum alloy 100kg.

[0026] The content of components is as follows: chromium 29kg; molybdenum 6kg; nitrogen 0.19kg; cobalt 64.81kg.

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Abstract

The invention discloses medical fully-austenitic cobalt-chromium-molybdenum alloy. The medical fully-austenitic cobalt-chromium-molybdenum alloy comprises, by weight, 26%-33% of chromium, 4.5%-7.5% of molybdenum, 0.08%-0.25% of nitrogen, and the balance cobalt and impurities. The invention further discloses a preparation method of the fully-austenitic cobalt-chromium-molybdenum alloy. The preparation method includes the steps of conducting smelting under the condition of 1490-1600 DEG C to obtain liquid alloy, conducting solidification and cooling till 1050-1250 DEG C, keeping the temperature for 2.5-3 hours, and then conducting air cooling so as to obtain a fully-austenitic cobalt-based alloy ingot. The invention aims at providing the non-magnetic fully-austenitic cobalt-based alloy which can be forged and subjected to heat treatment.

Description

technical field [0001] The invention relates to the field of cobalt-based materials, in particular to a medical full austenitic cobalt-chromium-molybdenum alloy and its preparation method and application. Background technique [0002] Cobalt-chromium-molybdenum alloy is a cobalt-based alloy supplemented with chromium and molybdenum. Although more alloying elements are added to the alloy, it still maintains the crystal structure characteristics of cobalt (face-centered cubic structure at high temperature, and face-centered cubic structure at medium temperature). Transformation into a hexagonal close-packed structure at low temperature), a biodeformable structural material applied to the human body. Due to the addition of chromium and molybdenum, the stability of the austenite structure is reduced, resulting in an increase in the martensitic transformation temperature of the alloy, which reduces the austenite temperature range of the alloy at high temperature, so when the allo...

Claims

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Application Information

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IPC IPC(8): C22C19/07C22C1/02
CPCC22C1/02C22C19/07
Inventor 李志刚李济林贾明邓军孙岳来刘海艳林浩
Owner METALINK SPECIAL ALLOYS CORP
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