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A kind of preparation method of universal reset screw seat titanium alloy bar

A technology of titanium alloy and screw seat, which is applied in the field of preparation of universal reset screw seat titanium alloy bar, can solve the problems of universal reset screw seat bar expansion, shrinkage, and expansion, and achieve equipment and processing technology Simple, eliminates tensile stress and compressive stress, and meets the effect of mass production

Active Publication Date: 2021-07-23
中科锐金山东钛业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The residual stress of the above-mentioned Ti-6Al-4V alloy in the process of processing causes the problem of flaring or shrinking of the universal reset screw seat bar in the production of medical products
The technical problem to be solved by the present invention is to provide a method for preparing titanium alloy bar of universal reset screw seat, in order to solve the problem of flaring or shrinking of Ti-6Al-4V alloy bar in the production of medical products

Method used

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  • A kind of preparation method of universal reset screw seat titanium alloy bar
  • A kind of preparation method of universal reset screw seat titanium alloy bar
  • A kind of preparation method of universal reset screw seat titanium alloy bar

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Experimental program
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Effect test

Embodiment 1

[0039] The composition design of the universal reset screw seat titanium alloy bar in this embodiment includes: 6.15% of Al element, 4.14% of V element, 0.17% of Fe element, 0.11% of O element, 0.013% of C element, and 0.0009% of H element %, N element 0.0092%, and the balance is Ti.

[0040] The preparation method of the universal reset screw seat titanium alloy bar is as follows:

[0041] Step 1. Use sponge titanium, metal Al, intermediate alloy AlV, metal Fe, compound TiO 2 According to the ingredients of titanium alloy, the vacuum self-consumption is used for three times of melting to obtain a titanium alloy ingot with stable and uniform composition;

[0042] Step 2: Carry out billet forging at 1100°C, and finish forging at 950°C. The holding time is controlled at 5 hours, and the deformation per time is controlled at 60%; The temperature is 40°C above the β-transition point of the titanium alloy, kept for 30 minutes, and water quenched to room temperature.

[0043] Ste...

Embodiment 2

[0056] The composition design of the universal reset screw seat titanium alloy bar in this embodiment includes: 6.35% of Al element, 4.3% of V element, 0.20% of Fe element, 0.13% of O element, 0.019% of C element, and 0.0005% of H element %, N element 0.0078%, and the balance is Ti.

[0057] The preparation method of the universal reset screw seat titanium alloy bar is as follows:

[0058] Step 1. Use sponge titanium, metal Al, intermediate alloy AlV, metal Fe, compound TiO 2 According to the ingredients of titanium alloy, the vacuum self-consumption is used for three times of melting to obtain a titanium alloy ingot with stable and uniform composition;

[0059] Step 2: Carry out blank forging at 1050°C, and finish forging at 900°C. The holding time is controlled at 2 hours, and the deformation per time is controlled at 40%; The temperature is 30°C above the β transformation point of the titanium alloy, kept for 60 minutes, and water quenched to room temperature.

[0060] S...

Embodiment 3

[0073] The composition design of the universal reset screw seat titanium alloy bar in this embodiment includes: 5.9% of Al element, 4.0% of V element, 0.16% of Fe element, 0.096% of O element, 0.037% of C element, and 0.001% of H element %, N element 0.0096%, and the balance is Ti.

[0074] The preparation method of the universal reset screw seat titanium alloy bar is as follows:

[0075] Step 1. Use sponge titanium, metal Al, intermediate alloy AlV, metal Fe, compound TiO 2 According to the ingredients of titanium alloy, the vacuum self-consumption is used for three times of melting to obtain a titanium alloy ingot with stable and uniform composition;

[0076] Step 2: Carry out billet forging at 1150°C, and finish forging at 1000°C. The holding time is controlled at 6 hours, and the deformation per time is controlled at 80%; The temperature is 50°C above the β transformation point of the titanium alloy, kept for 10 minutes, and water quenched to room temperature.

[0077] ...

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Abstract

The invention belongs to the technical field of processing titanium alloy materials for medical use, and in particular relates to a method for preparing titanium alloy rods for universal reset screw seats. The chemical composition and mass percentage of titanium alloy are: Al 5.9-6.4%, V 3.9-4.4%, Fe 0.15-0.22%, O 0.09-0.13%, C≤0.05%, H≤0.005%, N≤0.01%, and the rest The amount is Ti; firstly, the round bar blank is obtained through smelting, forging, and rolling processes; then, the uniform annealing process in the β single-phase region is adopted to obtain uniform fine-grained acicular martensite structure, and electric straightening and hyperbolic straightening are adopted. Straightening is carried out by direct composite process, and the electrified straightening temperature is controlled below 780°C to obtain a balanced residual stress state; finally, stress relief annealing and centerless grinding are carried out to prepare finished rods. The invention can produce substantially stress-free medical Ti-6Al-4V alloy rods, has excellent fatigue life, and provides qualified raw materials for manufacturing orthopedic medical device universal reset screw seats.

Description

technical field [0001] The invention belongs to the technical field of processing titanium alloy materials for medical use, and in particular relates to a method for preparing titanium alloy rods for universal reset screw seats. Background technique [0002] Titanium alloy has excellent biocompatibility, corrosion resistance, non-magnetic, non-toxic, and is widely used in the medical field. Ti-6Al-4V alloy is widely used in the production and preparation of medical products, but the titanium alloy rods and wires produced by the existing technology have large internal stress, which will be caused by the subsequent mechanical processing of the universal reset screw seat. Processing methods such as openings cause stress imbalances, causing expansion or contraction of the openings, which destroys the precision of medical products. Contents of the invention [0003] The residual stress existing in the above-mentioned Ti-6Al-4V alloy during processing causes the problem of flar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22F1/18C21D9/00C22C1/03B21J5/00B21J1/06B21D3/00B21B37/56B21B37/74B21C1/20B21C9/00B21C19/00B21B3/00A61L31/02A61L31/14
CPCA61L31/022A61L31/14B21B3/00B21B37/56B21B37/74B21C1/20B21C9/00B21C19/00B21D3/00B21J1/06B21J5/002C21D9/0075C21D2211/008C22C1/03C22C14/00C22F1/002C22F1/183
Inventor 柏春光张志强赵建杨锐
Owner 中科锐金山东钛业科技有限公司
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