Medical high-toughness cobalt-chromium alloy

A technology of cobalt-chromium alloy with high toughness, which is applied in medical science, pharmaceutical formulation, dentistry, etc., to meet the requirements of tensile and enamel hardness matching, simplify alloy composition, and improve toughness and elongation.

Active Publication Date: 2019-03-29
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there is no report on ceramic alloys that take into account the light weight and high toughness of the material.

Method used

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  • Medical high-toughness cobalt-chromium alloy
  • Medical high-toughness cobalt-chromium alloy
  • Medical high-toughness cobalt-chromium alloy

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Experimental program
Comparison scheme
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Embodiment

[0024] Adopt the high-toughness cobalt-chromium alloy of chemical composition of the present invention, its chemical composition is as shown in Table 1 (embodiment 1, embodiment 2 and embodiment 3). For convenience of comparison, the cobalt-chromium alloy (comparative example) prepared by the prior art is also listed in Table 1 at the same time.

[0025] Table 1 Chemical Composition of Smelted Alloy (wt.%)

[0026]

co

Cr

Mo

Fe

Ti

mn

P

S

Example 1

60.3

28.9

7.8

2.0

0.5

0.5

0.010

0.010

Example 2

65.2

24.4

8.0

1.6

0.5

0.3

0.008

0.009

Example 3

66.0

26.8

5.0

1.3

0.8

0.1

0.009

0.008

comparative example

63.0

29.0

6.0

2.0

-

-

0.01

0.01

[0027] The mechanical properties of the alloys with the above components are shown in Table 2, indicating that changing the composition of the alloys can significantly improve the mecha...

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PUM

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Abstract

The invention belongs to the field of precise alloy functional materials, and particularly relates to a medical high-toughness cobalt-chromium alloy. The alloy can be used as an orthopedic casting alloy, and comprises a dental baking porcelain alloy, a baking porcelain bracket restoring body and the like. The medical high-toughness cobalt-chromium alloy comprises, by mass, 24.0%-29.0% of Cr, 4.0%-8.0% of Mo, 1.3%-2.0% of Fe, 0.2%-0.8% of Ti, 0.1%-0.5% of Mn, less than or equal to 0.010% of P, less than or equal to 0.010% of S and the balance Co. According to the cobalt-chromium alloy, the density is 8.2g / cm3; the yield strength is greater than or equal to 650 MPa, the maximum yield strength can exceed 700 MPa; the Vickers hardness is greater than or equal to 390kgf / mm2; and the elongationis larger than or equal to 18%. Compared with a domestic traditional roasted porcelain casting alloy, the strength is nearly 6 times higher; and meanwhile, the processing performance is good, and thealloy can be widely applied to the field of biomedicine.

Description

technical field [0001] The invention belongs to the field of precision alloy functional materials, and in particular relates to a high-toughness cobalt-chromium alloy for medical use, which is used for orthopedic casting alloys, dental porcelain alloys, and ceramic bracket restoration bodies. Background technique [0002] Due to the characteristics of low density, excellent mechanical properties, and good corrosion resistance, non-precious metal alloys are gradually used in dental casting restorations. Ni-Cr alloys have been widely criticized due to problems such as biocompatibility. In recent years, biocompatible and safe cobalt-chromium bioceramic alloys have become the first choice for non-precious metal porcelain restorations in European and American patients. Cobalt-chromium bio-ceramic alloy has the characteristics of high hardness, good plasticity, and not easy to corrode. At the same time, it is easy to polish, and the long bridge and buckle are not easy to deform....

Claims

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Application Information

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IPC IPC(8): C22C19/07A61K6/04
CPCA61K6/84C22C19/07
Inventor 吴滨张敬霖于一鹏卢凤双张建生张建福
Owner CENT IRON & STEEL RES INST
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