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A kind of preparation method of cocrmo bone trabecular structure

A technology of bone trabecula and layer cutting, which is applied in the field of additive manufacturing, can solve the problems that the cleanliness is difficult to meet the requirements, the cleanliness of the sample is not high, and the introduction of more impurities, etc., to achieve low oxygen content, good biocompatibility, The effect of fewer post-processing steps

Active Publication Date: 2022-04-12
广州赛隆增材制造有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on the preparation method of CoCrMo trabecular bone structure mainly focuses on SLM technology. The trabecular bone structure for implants prepared by this technology has the following shortcomings: (1) The mechanical properties are poor, and the trabecular bone structure prepared by selective laser melting technology There are a large number of defects in the beam; (2) the response period is long, and the workpiece after selective laser melting requires a lot of post-processing, and the processing time is long; (3) the cleanliness of the sample is not high, and relatively high There are many impurities, and the cleanliness is difficult to meet the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The present invention relates to a kind of preparation method of CoCrMo bone trabecular structure, comprises the following steps:

[0028] Step 1, constructing a three-dimensional model of the sample to be processed.

[0029] Step 2, import the CoCrMo bone trabecular structure three-dimensional model that obtains in step 1 into slice software and carry out slice processing, obtain slice data; Described slice thickness is 0.035mm.

[0030] Step 3: Carry out path planning for the slice data obtained in step 2, scan the outer contour by point scanning, fill the remaining area with the inner contour, and import the data after path planning into the powder bed electron beam selective melting equipment; the path It is planned that the surface is indented by 0.02mm.

[0031] Step 4, CoCrMo powder (composition complies with American ASTM F75-18 Standard Specification for Cobalt-28 Chromium-6Molybdenum Alloy Castings and Casting Alloy for Surgical Implants (UNS R30075) or China...

Embodiment 2

[0039] The present invention relates to a kind of preparation method of CoCrMo bone trabecular structure, comprises the following steps:

[0040] Step 1, constructing a three-dimensional model of the sample to be processed.

[0041] Step 2, import the CoCrMo bone trabecular structure three-dimensional model that obtains in step 1 into slice software and carry out slice processing, obtain slice data; Described slice thickness is 0.05mm.

[0042] Step 3: Carry out path planning for the slice data obtained in step 2, scan the outer contour by point scanning, fill the remaining area with the inner contour, and import the data after path planning into the powder bed electron beam selective melting equipment; the path It is planned that the surface is indented by 0.07mm.

[0043] Step 4, put the CoCrMo powder into the powder bin of the powder bed electron beam selective melting equipment, and vacuum the equipment until the vacuum degree of the molding chamber is lower than 10 -2 P...

Embodiment 3

[0051] The present invention relates to a kind of preparation method of CoCrMo bone trabecular structure, comprises the following steps:

[0052] Step 1, constructing a three-dimensional model of the sample to be processed.

[0053] Step 2, import the CoCrMo bone trabecular structure three-dimensional model that obtains in step 1 into slice software and carry out slice processing, obtain slice data; Described slice thickness is 0.07mm.

[0054] Step 3: Carry out path planning for the slice data obtained in step 2, scan the outer contour by point scanning, fill the remaining area with the inner contour, and import the data after path planning into the powder bed electron beam selective melting equipment; the path It is planned that the surface is indented by 0.05mm.

[0055] Step 4, put the CoCrMo powder into the powder bin of the powder bed electron beam selective melting equipment, and vacuum the equipment until the vacuum degree of the molding chamber is lower than 10 -2 P...

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Abstract

The present invention provides a method for preparing a CoCrMo trabecular bone structure, comprising the following steps: 1. Constructing a three-dimensional model; 2. Importing the 3D model into a slice software to obtain slice data; 3. Carrying out path planning for the slice data, Import the planned data into the powder bed electron beam selection melting equipment; 4. Put the CoCrMo powder into the selection melting equipment and vacuum; 5. Preheat the molding substrate; 6. Spread the CoCrMo powder evenly on the molding substrate , preheating; 7. CoCrMo powder is melted according to the selected area according to the imported data to obtain a single-layer CoCrMo sheet; 8. Repeat steps 6 and 7 to form a complete CoCrMo trabecular bone structure, and take it out after cooling; the present invention uses The powder bed electron beam selective melting technology has fast forming efficiency and high precision, and the CoCrMo bone trabecular bone produced has high strength, low modulus and low oxygen content, and is suitable for human implants.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a method for preparing a CoCrMo trabecular bone structure. Background technique [0002] Among the commonly used medical implant materials, TC4 has problems such as poor wear resistance and insufficient shear strength, 316L stainless steel has poor biocompatibility, high metal density and high price, and CoCrMo alloy has good Mechanical properties, ultra-high wear resistance and corrosion resistance, and excellent biocompatibility are more and more widely used in medical implant materials. At present, CoCrMo alloy implants are usually prepared by forging, but because its elastic modulus is much higher than that of human bone, it is easy to cause "stress shielding" phenomenon, which leads to operation failure. The trabecular bone structure can reduce the elastic modulus of CoCrMo alloy implants, and can induce the growth of human cells by adjusting the pore size, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F10/28B22F3/105A61F2/28B33Y10/00B33Y50/02B33Y40/10B33Y80/00B33Y70/00
CPCA61F2/28A61F2/30942B33Y10/00B33Y50/02B33Y40/00B33Y80/00B33Y70/00A61F2002/2835A61F2002/30784B22F10/00B22F10/36B22F10/28B22F10/362B22F10/32B22F10/80Y02P10/25
Inventor 龙学湖郭瑜汪强兵潘彦明时明军胡涵
Owner 广州赛隆增材制造有限责任公司