A kind of high-strength antibacterial titanium alloy bar material, wire material and preparation method thereof

Abstract

The invention provides a high-strength antibacterial titanium alloy rod, wire and a preparation method thereof. The chemical composition of the titanium alloy is as follows (weight%): Al: 5.5-6.5; V: 3.5-4.5; Cu: 2-4.5 8; Ti margin. The preparation method of the titanium alloy rods and wires is as follows: smelting in a vacuum consumable furnace to obtain raw material ingots; after grinding the ingots, they are processed into billets by forging and precision forging at a temperature above 1000°C; the billets are processed at 800°C- After a period of heat preservation at 1350°C, it is rapidly cooled, and the bar obtains an ultra-fine nano-slab structure; after quenching, the billet is hot-rolled at a temperature of 750°C to 850°C, and the cumulative deformation of hot rolling is greater than or equal to 90%, and an ultra-fine nano-slab structure is obtained. Lath structure rods; after hot rolling, the rods can be drawn to the target diameter rods and wires in a single pass at 600°C-700°C and a drawing speed of 1-3m / min. The rods and wires processed by this method are equiaxed grains with a size of less than 500nm, and the grains do not coarsen and grow within 3 hours of aging at 650°C or below.

Description

technical field [0001] The invention relates to the field of titanium alloy processing and preparation, in particular to a high-strength antibacterial titanium alloy rod, wire and a preparation method thereof. Background technique [0002] Titanium alloy is a metal with excellent biological safety. It has low density, elastic modulus close to that of human bone, and high strength. Therefore, titanium and its alloys are widely used in the field of medical and health care, especially in oral and orthopedic repairs. Fields, such as brackets, rings, orthodontic archwires, implants for anchorage, artificial joints (knee, knee, shoulder, ankle, elbow, wrist, knuckles, etc.), orthopedic trauma products (intramedullary nails, plates, screws etc.), spinal orthopedic internal fixation system, etc. [0003] Titanium alloys have been used in the medical field for nearly 70 years. Various grades of titanium alloys have emerged in an endless stream. The updates and iterations have gradua...

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Problems solved by technology

Secondly, another advantage of medical titanium alloy is its low density, and its elastic modulus is close to that of the human body. However, when it is used as a load-bearing implant, such as the artificial hip joint, it often fails due to fracture failure. Bring great suffering to patients, resulting in a heavy mental and economic burden

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