Preparation method for selective laser melting of cobalt-chromium alloy and cobalt-chromium false tooth alloy material

A cobalt-chromium alloy and selective laser technology, applied in the field of materials, can solve the problems of less research on medical applications and the mechanical properties of cobalt-chromium alloys need to be further improved, and achieve the effect of excellent mechanical properties

Inactive Publication Date: 2022-01-11
江西金石三维智能制造科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, domestic research on SLM technology mostly focuses on the development of SLM equipment, while there are relatively few studies on the medical application of SLM-formed cobalt-chromium alloys.
In addition, the mechanical properties of SLM-formed cobalt-chromium alloys still need to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0013] An embodiment of the present invention provides a method for preparing a cobalt-chromium alloy by selective laser melting, comprising:

[0014] The cobalt-chromium alloy is melted in a selected area laser equipment. The selected area laser melting process parameters are laser power of 200-400W, spot diameter of 0.01-0.05mm, scanning speed of 500-700mm / s, powder layer The thickness is 0.01-0.03mm;

[0015] Put the cobalt-chromium alloy that has been processed by selective laser melting into a vacuum furnace. After vacuuming, raise the temperature from room temperature to 800-1100°C at a rate of 100-120°C / min, and keep it warm for 20-50min for annealing treatment. After cooling, a cobalt-chromium denture alloy material is obtained.

[0016] In an embodiment of the present invention, the cobalt-chromium alloy includes the following elements by weight percentage:

[0017] Cr 33.5-37.5%, Mo 3.0-6.0%, Ti 3.0-5.0%, W 3.1-7.5%, and the balance is Co.

[0018] In the embodime...

Embodiment 1

[0029] The cobalt-chromium alloy is placed in a selected area laser equipment for melting treatment. The selected area laser melting process parameters are laser power of 250W, spot diameter of 0.02mm, scanning speed of 550mm / s, and powder layer thickness of 0.01mm; The cobalt-chromium alloy includes the following elements by weight: 35.5% Cr, 4.2% Mo, 4.3% Ti, 5.5% W and 50.5% Co; its particle size is 30 μm, and its sphericity is 95%. Put the cobalt-chromium alloy processed by selective laser melting into a vacuum furnace, and after vacuuming, raise the temperature from room temperature to 850°C at a rate of 110°C / min, keep it warm for 25 minutes for annealing treatment, and cool down with the temperature to obtain a cobalt-chromium denture Alloy materials. According to the test, the tensile strength of the cobalt-chromium denture alloy material in Example 2 is 1425.14MPa, the yield strength is 1327.23MPa, and the elongation is 23.17%.

Embodiment 2

[0031] The cobalt-chromium alloy is placed in a selected area laser equipment for melting treatment. The selected area laser melting process parameters are laser power of 200W, spot diameter of 0.01mm, scanning speed of 500mm / s, and powder layer thickness of 0.01mm; The cobalt-chromium alloy includes the following elements by weight: 35.5% Cr, 4.5% Mo, 4.2% Ti, 5.3% W and 50.5% Co; its particle size is 40 μm, and its sphericity is 95%. Put the cobalt-chromium alloy that has been melted by selective laser into a vacuum furnace, and after vacuuming, raise the temperature from room temperature to 800°C at a rate of 110°C / min, keep it warm for 20 minutes for annealing treatment, and cool down with the temperature to obtain a cobalt-chromium denture Alloy materials. The test shows that the tensile strength of the cobalt-chromium denture alloy material in Example 1 is 1420.84MPa, the yield strength is 1320.57MPa, and the elongation is 23.51%.

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Abstract

The invention is applicable to the technical field of materials, and provides a preparation method for selective laser melting of a cobalt-chromium alloy and a cobalt-chromium false tooth alloy material. The method comprises the steps that the cobalt-chromium alloy is placed in selective laser equipment for melting treatment, and the technological parameters of selective laser melting are as follows: the laser power is 200-400 W, the spot diameter is 0.01-0.05 mm, the scanning speed is 500-700 mm/s, and the powder laying layer thickness is 0.01-0.03 mm; and the cobalt-chromium alloy subjected to selective laser melting treatment is put into a vacuum furnace, the temperature is increased to 800-1100 DEG C at the temperature increasing speed of 100-120 DEG C/min, heat preservation is conducted for 20-50 min, annealing treatment is conducted, and cooling is conducted along with the temperature. The high-precision cobalt-chromium false tooth alloy material can be formed, the error generated in the X direction is 0.1-0.27%, the error generated in the Y direction is 0.2-0.3%, the error generated in the Z direction is 0.3-0.5%, and the cobalt-chromium false tooth alloy material has excellent mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a method for preparing a cobalt-chromium alloy by selective laser melting and a cobalt-chromium denture alloy material. Background technique [0002] Additive manufacturing technology can be divided into the following categories according to the different molding methods: selected laser sintering (SLS), stereolithography (SLA), selective laser melting (SLM), and electron beam melting (EBM). With the continuous advancement of science and technology, the application market of additive manufacturing technology will become wider and wider. The advantage of additive manufacturing technology compared with traditional manufacturing technology is that it can directly form parts with complex structures without structural constraints. In the medical field, additive manufacturing technology conforms to the development trend of personalized and precision medicine, and has been ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F10/28B22F10/64B22F1/065C22C19/07C22C30/00A61C13/08B33Y10/00B33Y40/20B33Y70/00
CPCB22F10/28B22F10/64C22C19/07C22C30/00A61C13/08A61C13/0018A61C13/0019B33Y10/00B33Y40/20B33Y70/00Y02P10/25
Inventor 邱海平江泽星吴杰华
Owner 江西金石三维智能制造科技有限公司
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