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A kind of rolling processing method of medical β titanium alloy thin plate

A processing method and technology of beta titanium alloy, applied in the field of sheet metal processing, can solve the problems of stress matching and transmission between implants and bone tissue, and achieve the effects of reliable performance, accurate temperature control, and a wide range of equipment sources.

Inactive Publication Date: 2017-12-26
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with traditional medical titanium alloy materials, the biocompatibility of these newly developed third-generation medical β-titanium alloys has been greatly improved, and the elastic modulus has also decreased by 30-50%, but it is still twice the human bone modulus. The above did not completely solve the problem of stress matching and transmission between the implant and bone tissue

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  • A kind of rolling processing method of medical β titanium alloy thin plate
  • A kind of rolling processing method of medical β titanium alloy thin plate
  • A kind of rolling processing method of medical β titanium alloy thin plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This embodiment includes the following steps:

[0024] Step 1. Under vacuum conditions or inert gas protection, heat a titanium alloy slab with a thickness of 5mm to 920°C and keep it warm for 30 minutes, then place the heat-preserved titanium alloy slab at -20°C for low-temperature quenching, and then heat the slab Placed in the air to dry naturally to room temperature;

[0025] Step 2: Carry out three-pass rolling to the titanium alloy slab, the processing rate of the first and second passes is 20%, and the processing rate of the third pass is 5%; the procedure is adopted before each pass rolling The temperature control device cools down the titanium alloy slab between two adjacent passes during the rolling process, the temperature is -20°C, and the holding time is 20 minutes;

[0026] Step 3, the titanium alloy slab after cooling treatment in step 2 is rolled again four times, the pass processing rate of rolling is 8%, between the adjacent two passes in the rolling ...

Embodiment 2

[0030] This embodiment includes the following steps:

[0031] Step 1. Under vacuum conditions or inert gas protection, heat a titanium alloy slab with a thickness of 5mm to 920°C and keep it warm for 40 minutes, then place the heat-preserved titanium alloy slab at -35°C for low-temperature quenching, and then heat the slab Placed in the air to dry naturally to room temperature;

[0032] Step 2: Carry out three-pass rolling to the titanium alloy slab, the processing rate of the first and second pass is 5%, and the processing rate of the third pass rolling is 15%; The temperature control device cools down the titanium alloy slab between two adjacent passes during the rolling process, the temperature is -35°C, and the holding time is 10 minutes;

[0033] Step 3, the titanium alloy slab after cooling treatment in step 2 is carried out four pass rolling again, the pass processing rate of rolling is 15%, between two adjacent passes in the rolling process The titanium alloy slab is...

Embodiment 3

[0037] This embodiment includes the following steps:

[0038] Step 1. Under vacuum conditions or inert gas protection, heat a titanium alloy slab with a thickness of 5mm to 840°C and keep it warm for 80 minutes, then place the heat-preserved titanium alloy slab at -50°C for low-temperature quenching, and then heat the slab Placed in the air to dry naturally to room temperature;

[0039] Step 2: Carry out three-pass rolling to the titanium alloy slab, the processing rate of the first and second passes is 15%, and the processing rate of the third pass is 5%; The temperature control device cools down the titanium alloy slab between two adjacent passes during the rolling process, the temperature is -80°C, and the holding time is 5 minutes;

[0040]Step 3: Carry out four passes of rolling to the titanium alloy slab after cooling treatment in step 2, the pass processing rate of rolling is 11%, and the rolling process is carried out between adjacent two passes. The titanium alloy s...

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Abstract

The invention discloses a novel medical beta titanium alloy thin plate rolling machining method. The method comprises the steps that under a vacuum condition or inert gas shielding, a titanium alloy slab is subjected to solution treatment for 30-80 min at the temperature of 840-920 DEG C at first and then is subjected to low-temperature cold quenching at the temperature of minus 50-minus 20 DEG C; the slab is placed in air and subjected to natural air drying to the room temperature and then multi-pass rolling, and after each pass of rolling, the slab is subjected to cooling treatment for 2-20 min at the temperature of minus 80-minus 20 DEG C; and finally, the rolled titanium alloy slab is subjected to high-temperature short-time recrystallization annealing treatment for 2-60 min at the temperature of 780-850 DEG C, and a titanium alloy thin plate is obtained. According to the novel medical beta titanium alloy thin plate rolling machining method, a uniform fine grain structure composed of beta phases and alpha' phases can be obtained by controlling parameters of the pass deformation amount, the pass holding temperature, the annealing temperature and the like, so that the elasticity modulus of titanium alloy is reduced, and the strength of the titanium alloy is improved. The method is simple and easy to achieve, the equipment source is wide, the performance is reliable, the environment is not polluted, and large-scale production can be achieved.

Description

technical field [0001] The invention belongs to the technical field of sheet metal processing, and in particular relates to a rolling processing method for a medical β titanium alloy thin sheet. Background technique [0002] Among medical metal materials, titanium and its alloys have high specific strength, low elastic modulus, good corrosion resistance and biocompatibility, and have become the medical materials for artificial joints, dental implants and cardiovascular stents. Preferred material for implant products. Pure titanium, Ti–3Al–2.5V and Ti–6Al–4V belong to the first generation of medical titanium alloys developed by people. Although pure titanium has excellent corrosion resistance, its strength is low and its wear resistance is poor, which limits its application in parts with large loads. The other two alloys have higher strength and better processing properties, but contain V and Al elements that are harmful to human body, and their biocompatibility is poor, so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B3/02C22F1/18
CPCB21B3/02C22F1/002C22F1/183
Inventor 许艳飞王章文璟吴靓肖逸锋钱锦文张明华阳文豪
Owner XIANGTAN UNIV
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