An antibacterial equiaxed nanocrystalline ti-cu rod, wire and preparation method thereof

Abstract

The invention provides an antibacterial equiaxed nanocrystalline Ti-Cu rod, a wire and a preparation method thereof. The chemical composition of the titanium alloy is as follows (weight %): Cu: 3-7; Ti balance. 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 being kept at 1000°C for a period of time, it is rapidly cooled, and the rod obtains an ultra-fine nano-slab structure; after quenching, the billet is hot-rolled at a temperature of 700°C to 800°C, and the cumulative deformation of hot rolling is greater than or equal to 95%, and an ultra-fine nano-slab structure is obtained. Lath structure bar; after hot rolling, the bar is drawn at 600°C-700°C at a drawing speed of 1-3m / min, and the bar and wire obtained after processing are equiaxed grains with a size of less than 500nm. And the grains do not coarsen and grow within 3 hours of aging at 550°C and below.

Description

technical field [0001] The invention relates to the field of titanium alloy processing and preparation, in particular to an antibacterial equiaxed nanocrystalline Ti-Cu 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 gra...

AI Technical Summary

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

Images