Production method of medical fine-grain titanium/titanium alloy bar

A production method and technology for titanium alloys, applied in metal processing equipment and other directions, can solve the problems of low yield, unstable product structure and properties, and achieve the effects of consistent performance, stable microstructure and mechanical properties, and low cost.

Active Publication Date: 2015-02-18
西安赛特新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a production method of medical fine-grained titanium / titanium alloy rods, which solves the problems of unstable product structure and performance and low yield in the prior art

Method used

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  • Production method of medical fine-grain titanium/titanium alloy bar
  • Production method of medical fine-grain titanium/titanium alloy bar
  • Production method of medical fine-grain titanium/titanium alloy bar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) The Ti6Al4VELIα+β two-phase titanium alloy ingot with a diameter of Ф460㎜ is used, and the riser is cut from the ingot to remove the skin pores.

[0024] (2) Use a 1250-ton hydraulic press to heat the ingot qualified in step (1) at 170°C above the phase transition point for 270 minutes, and forge it into a billet with a side length of 320mm, and return it to the furnace for 100 minutes to forge a side length of 230mm square billet, and thermally cut into 320mm long blocks.

[0025] (3) Cool the forging billet prepared in (2) to room temperature, and heat the billet after grinding surface defects to 60°C above the phase transition point for upsetting and elongation deformation for 3 times, the final forging temperature is 850°C, and the deformation amount of each pass 40%, and the total deformation is accumulated to 120%.

[0026] (4) Cool the forged billet prepared in (3) to room temperature, and after grinding surface defects, upsetting and elongating forging 3 ti...

Embodiment 2

[0033] (1) The Ti6Al7Nbα+β type two-phase titanium alloy ingot with a diameter of Ф360㎜ is used, and the riser is cut from the ingot to remove the skin pores.

[0034] (2) Use a 1250-ton hydraulic press to heat and hold the qualified ingot in step (1) at 150°C above the phase transition point for 220 minutes, forge it into a billet with a side length of 220 mm, and thermally cut it into 300 mm-long blocks. .

[0035] (3) Cool the forging billet prepared in (2) to room temperature, and heat the billet after grinding surface defects to 50°C above the phase transition point for upsetting and elongation deformation for 3 times, the final forging temperature is 850°C, and the deformation amount of each pass 40%, and the total deformation is accumulated to 120%.

[0036] (4) Cool the forged billet prepared in (3) to room temperature, and after grinding surface defects, upsetting and elongating forging 3 times at 30°C below the phase transition point, the deformation amount of each ...

Embodiment 3

[0042] (1) A TA2 ingot with a diameter of Ф360㎜ is used, and the riser is cut from the ingot to remove the skin pores.

[0043] (2) Use a 5-ton air hammer to heat and hold the qualified ingot in step (1) at 1050°C above the phase transition point for 220 minutes, forge it into a billet with a side length of 210mm, and thermally cut it into a 280mm-long billet. blocks.

[0044] (3) Cool the forging billet prepared in (2) to room temperature, and heat the billet after grinding surface defects to 90°C above the phase transition point for upsetting and elongating deformation for 3 times, the final forging temperature is 800°C, and the deformation amount of each pass 40%, and the total deformation is accumulated to 120%.

[0045] (4) Cool the forged billet prepared in (3) to room temperature, and after grinding the surface defects, heat it to 10°C below the phase transition point for upsetting and elongating forging 3 times, the deformation amount of each pass is 35%, and the cumu...

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Abstract

The invention discloses a production method of a medical fine-grain titanium / titanium alloy bar. The production method comprises the following steps of: performing combined multidirectional upsetting and stretching deformation on a forging blank above and below a phase transformation point T(beta); and after the last upsetting and stretching deformation, directly stretching the upset blank into a finished product of bar. The production method disclosed by the invention is simple and convenient, the technology is standard, little cracking occurs in a production process, large-specification ingot and large forging equipment are not required, and the cost is low. The production method disclosed by the invention has no limit to the alloy type, the ingot specification and the processing means, and is suitable for the production and processing of a small number of medical titanium / titanium alloy bars of multiple varieties and multiple specifications. According to the medical fine-grain titanium / titanium alloy bar disclosed by the invention, the microscopic structure and mechanical property of the product are stable, and the two ends are consistent with the middle part in performance.

Description

technical field [0001] The invention belongs to the technical field of medical implant materials, and relates to a production method of medical fine-grained titanium / titanium alloy rods. Background technique [0002] Bio-type knee joints, bone joints and other medical implant materials made of titanium alloys are widely used day by day. Kneecaps, joints and sockets of medical implants are mainly made of titanium or titanium alloy rods with a specification of Φ50㎜~Φ100㎜. The microstructure and properties of medical titanium and titanium alloy rods are subject to the same standards as those of small specifications (diameter less than 30mm). The average grain size of the annealed transverse microstructure of pure titanium products is not coarser than grade 7 in GB / T6394. The annealed transverse microstructure of TC4, TC4ELI, and TC20 titanium alloy products should be α+β processed structure, and it should be evaluated according to Appendix A of GB / T13810-2007 standard, and it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/18B21J5/08B21C1/00
Inventor 王卫民林邵华罗乾伟张占英曹继敏
Owner 西安赛特新材料科技股份有限公司
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