Preparation method of TC4ELI titanium alloy bar

A titanium alloy and bar technology, applied in the field of preparation of TC4ELI titanium alloy bars, can solve the problems of coarse equiaxed grains, low overall level, poor batch stability, etc., to reduce the generation of cracks and unevenness. improve the effectiveness of internal organization

Active Publication Date: 2013-11-20
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0003] However, the overall level of application and development of biomedical titanium alloy TC4ELI in my country is not high, and the process of industrial scale production is unstable, mainly due to the use of conventional forging processing technology, the forging temperature is too high, the processing deformation is small, and the forging method is not properly selected. As well as factors such as high straightening temperature in the later stage, the obtained Φ8mm~Φ90mm TC4ELI titanium alloy rods not only have poor microstructure refinement and poor batch stability in terms of performance, but also have a small equiaxed α phase volume fraction and insufficient grain breakage. , equiaxed grain coarse
At the same time, the industrialized processing of commonly used TC4ELI titanium alloy rods is complicated and costly, making it difficult to provide low-cost, high-quality medical-grade raw materials

Method used

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  • Preparation method of TC4ELI titanium alloy bar

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The preparation method of present embodiment TC4ELI titanium alloy bar comprises the following steps:

[0037] Step 1: Utilize the fast forging machine to carry out blank forging to the TC4ELI titanium alloy ingot, and obtain the primary forging blank after air cooling; the TC4ELI titanium alloy ingot is a cylindrical ingot with a cross-sectional diameter of 640mm, and the primary forging blank is The cross-sectional shape is a square, and the side length of the square is 300mm; the blank forging is divided into 2 fires, and the initial forging temperature of each fire is 150°C above the β transformation point. The final forging temperature is not lower than 700°C;

[0038] Step 2. Use free forging equipment to carry out upsetting and drawing forging of the primary forging billet described in step 1, and obtain an intermediate forging billet after water cooling; the upsetting and drawing forging is completed in 6 fires, of which the first fire and the second fire The i...

Embodiment 2

[0043] The preparation method of present embodiment TC4ELI titanium alloy bar comprises the following steps:

[0044] Step 1: Utilize the fast forging machine to carry out billet forging to the TC4ELI titanium alloy ingot, and obtain a primary forging billet after air cooling; the TC4ELI titanium alloy ingot is a cylindrical ingot with a cross-sectional diameter of 410 mm, and the primary forging billet is The cross-sectional shape is square, and the side length of the square is 260mm; the blank forging is divided into 3 fires, and the initial forging temperature of each fire is 180°C above the β transformation point. The final forging temperature is not lower than 700°C;

[0045] Step 2. Use free forging equipment to carry out upsetting and drawing forging of the primary forging billet described in step 1, and obtain an intermediate forging billet after water cooling; the upsetting and drawing forging is completed in 6 fires, of which the first fire and the second fire The i...

Embodiment 3

[0050] The preparation method of present embodiment TC4ELI titanium alloy bar comprises the following steps:

[0051] Step 1: Utilize the fast forging machine to carry out blank forging to the TC4ELI titanium alloy ingot, and obtain a primary forging billet after air cooling; the TC4ELI titanium alloy ingot is a cylindrical ingot with a cross-sectional diameter of 950 mm, and the primary forging billet is The cross-sectional shape is square, and the side length of the square is 480mm; the blank forging is divided into 2 fires to complete, and the initial forging temperature of each fire is 200°C above the β transformation point, and each fire The final forging temperature is not lower than 700°C;

[0052] Step 2. Use free forging equipment to carry out upsetting and drawing forging of the primary forging billet described in step 1, and obtain an intermediate forging billet after water cooling; the upsetting and drawing forging is completed in 6 fires, of which the first fire a...

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Abstract

The invention provides a preparation method of a TC4ELI titanium alloy bar. The preparation method comprises the following steps of: (1) carrying out cogging forging; (2) carrying out upsetting forging; (3) carrying out precise forging; (4) carrying out shearing, straightening and annealing treatment in sequence, thereby obtaining the cylindrical TC4ELI titanium alloy bar with the cross-section diameter of 15mm-90mm. The invention also provides a preparation method of the TC4ELI titanium alloy bar. The preparation method comprises the following steps of: (1) carrying out cogging forging; (2) carrying out upsetting forging; (3) carrying out precise forging; (4) rolling; (5) carrying out shearing, straightening and annealing treatment in sequence, thereby obtaining the cylindrical TC4ELI titanium alloy bar with the cross-section diameter of 8mm-15mm. The preparation method is simple in process, strong in repeatability and suitable for large-scale industrial production; the TC4ELI titanium alloy bar prepared by adopting the preparation method is uniform and fine in structure, high in microscopic structure level and excellent in mechanical property.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy materials, and in particular relates to a preparation method of TC4ELI titanium alloy rods. Background technique [0002] At present, TC4 titanium alloy (Ti6Al4V) and TC4ELI titanium alloy (Ti6Al4VELI) are mainly used in the world to prepare joint and trauma orthopedic implants, such as artificial joints, intramedullary nails, bone screws, root implants, kneecaps, The hip joint and acetabulum, especially the low-gap TC4ELI titanium alloy is the most widely used. Generally, the microstructures that meet the requirements of surgically implanted titanium alloy products are A1-A9, of which A1 is the smallest. In addition, the study found that the more the volume fraction of the equiaxed α phase in the structure, the finer the grains, and the better the biomechanical properties of the obtained TC4ELI alloy, which is also the goal pursued by the research and development field of the medical TC4E...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18
Inventor 麻西群于振涛皇甫强张亚峰余森牛金龙袁思波
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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