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Preparation method of medical titanium alloy

A technology of titanium alloy and titanium metal, applied in the field of preparation of medical titanium alloy, can solve the problems of no antibacterial properties on titanium surface, low bone conductivity, failure of implantation operation, etc., and achieve excellent corrosion resistance, excellent antibacterial rate, good The effect of the hydrophilic effect

Active Publication Date: 2021-08-13
陕西中晶有色金属有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, although titanium and titanium alloys are closer to the elastic modulus of bone than other materials, there is still a certain gap. After titanium without surface treatment is implanted into the human body as a hard tissue repair material, it will have a negative effect on bone elasticity. Less conductive than bioactive ceramics
The untreated titanium surface has no antibacterial properties, and the wear debris generated by the friction of implanted human body can cause inflammation, and bacterial infection can also lead to the failure of implant surgery

Method used

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  • Preparation method of medical titanium alloy
  • Preparation method of medical titanium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Method for preparing medical titanium alloys, including the following steps:

[0014] S1: The mass percentage of 72% titanium powder, 22.4% tantalum metal powder, 1.6% iron metal powder and 4% silver metal powder were mixed into the vacuum ball mill, and the ball mill was vacuumped after 3.5 hours. 9Pa, then rush into argon, so repeated three times to ensure no air in the vacuum ball grinding, where the vacuum ball mill ball is rotational speed at 160r / min, the ball milling time is 22 h,

[0015] S2: Place the mixed metal powder obtained by step S1 in the graphite crucible, sintering on the discharge plasma sintering system, first rising from 10 ° C / min to 500 ° C from the room temperature to the sintering temperature, then heat insulation 5min The temperature rise rate is 1.5 ° C / min, and the junction temperature is 880 ° C, the sintering time is 25 min, and the pulse current is opened for 1.5 min every 5 minutes during the sintering process, and the axial pressure o...

Embodiment 2

[0017] Method for preparing medical titanium alloys, including the following steps:

[0018] S1: The mass percentage of 75% titanium powder, 20% tantalum metal powder, 1.5% iron metal powder and 3.5% silver metal powder were mixed into the vacuum ball mill, and the ball milling tank was pumped after 5 h after ball milling. Vacuum to 12PA, then rush into argon, so repeated three times to ensure no air in the vacuum ball grinding; there is a vacuum ball mill ball milling at 220 r / min, the ball milling time is 30 h,

[0019] S2: Place the mixed metal powder obtained by step S1 in the graphite crucible, sintering on the discharge plasma sintering system, raised from the room temperature to the sintering temperature first with the temperature rise rate of 15 ° C / min to 600 ° C, heat insulation 8min The temperature increase of 3 ° C / min to the sintering temperature, the junction temperature is 920 ° C, the sintering time is 50 min, and the pulse current is opened every 5 minutes d...

Embodiment 3

[0021] Method for preparing medical titanium alloys, including the following steps:

[0022] S1: The mass percentage of 70% titanium powder, 23.6% tantalum metal powder, 2% iron metal powder and 4.4% silver metal powder were mixed into the vacuum ball mill, and the ball milling tank was pumped after the ball milling for 4 h Vacuum to 10 Pa, then rush into argon, so repeated three times to ensure no air in the vacuum ball grinding; there is a vacuum ball mill ball milling at 200R / min, ball milling time is 25h,

[0023] S2: Place the mixed metal powder obtained by step S1 in the graphite crucible, sintering on the discharge plasma sintering system, raised from the room temperature to the sintering temperature, then rose the temperature rise rate of 12 ° C to 550 ° C, after holding 6 minutes The temperature rise rate of 2 ° C / min is warmed to the sintering temperature, the junction temperature is 900 ° C, the sintering time is 40 min, and the pulse current is opened every 5 minut...

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Abstract

The invention discloses a preparation method of a medical titanium alloy. The preparation method comprises the following steps that 70%-75% by mass of titanium metal powder, 20%-23.6% by mass of tantalum metal powder, 1.5%-2.2% by mass of iron metal powder and 3.1%-5% by mass of silver metal powder are mixed and added into a vacuum ball-milling tank, ball milling is carried out for 3.5 h-5 hours, vacuumizing is conducted on the ball-milling tank, then argon is charged, and the operation is repeated for three times to ensure that no air exists in the vacuum ball-milling tank; and the mixed metal powder obtained in the step S1 is placed in a graphite crucible, sintering is conducted on a spark plasma sintering system, the sintering temperature ranges from 880 DEG C to 920 DEG C, the sintering time ranges from 25 min to 50 min, pulse current is turned on for 1.5 min to 2 min every 5 min in the sintering process, 32 MPa to 35 MPa axial pressure is continuously applied, the vacuum degree of the system is kept to be 5 Pa to 10 Pa, and furnace cooling is conducted after sintering is finished.

Description

Technical field [0001] The present invention belongs to the field of titanium alloy, and more particularly to the preparation method of medical titanium alloys. Background technique [0002] Biomedical materials refer to materials with special properties, special functions, for artificial organs, surgery repair, physiotherapy recovery, diagnosis, treatment, and materials that do not have adverse effects on organisms. As a biomedical material, there must be characteristics such as non-toxic, antibiotic corrosivity, mechanical properties, and biocompatibility. Titanium-based material, including pure titanium and titanium alloy, superior mechanical properties, strong corrosion resistance, low elastic modulus, good biocompatibility, is currently used in internal fixation materials, as implant materials in orthopedics In-internal fixation, especially in the load site, is widely used. Compared with common stainless steel and cobalt chromium alloys, the titanium-based material is lighte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04C22C14/00B22F9/04B22F3/105A61L27/04A61L27/54
CPCC22C1/0458C22C14/00B22F9/04B22F3/105A61L27/047A61L27/54B22F2009/043B22F2003/1051A61L2300/104A61L2300/404A61L2430/02
Inventor 谭丽霞
Owner 陕西中晶有色金属有限公司
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