The processing method of titanium alloy special-shaped capillary materials involves winding titanium alloy capillary materials drawn to a certain specification onto a wire wheel. Turn the reel and release the capillary tube material wound on the reel. The capillary material, after passing through the heating mechanism, enters the mold with a circular hole shape for diameter reduction and then enters the cooling device. Then, it continuously undergoes cold drawing processing through molds of different hole types; According to the different shapes of the finished profiled materials, the series of mold hole types can be selected to pull out profiled materials with a certain cross-sectional area of shape. The products produced by this method feature high quality stability, high yield rate, good quality, excellent mechanical properties and elasticity, as well as good subsequent processing performance. They can be widely applied in the production and processing fields of vascular stents and guiding tubes for minimally invasive surgeries.
Titanium alloy special-shaped capillary materials, as medical device materials for minimally invasive surgery, mainly develop in the direction of product miniaturization. Among them, special-shaped materials are an important product type, and 80% of them belong to special-shaped materials with super elastic performance. At present, titanium alloy special-shaped capillary materials produced by traditional processing methods have many deficiencies, such as: 1. The production process is complex and the degree of mechanization is not high; 2. The mechanical properties and elasticity of the profiled materials are not satisfactory and cannot meet the requirements for subsequent use. 3. The stability of product quality is not high. 4. It is difficult to achieve large-scale production. For this purpose, the present invention has developed a porous, continuous and rapid processing technology for titanium alloy special-shaped capillary materials. This technology can continuously produce rolled titanium alloy special-shaped capillary materials and is suitable for large-scale automated production.
After annealing heat treatment of Φ1.6mm, the annealing temperature is 800℃ to 900℃. Then, the rectangular material of Φ1.6mm→Φ1.5mm→0.8×2.2mm is drawn. The process of Φ1.6mm→0.8×2.2mm is cold drawing, following the mold process of elliptical → elliptical → rectangular → rectangular. Φ1.6mm→ elliptical (Rx1.3, Ry1.8)→ elliptical (Rx1.1, Ry2.0)→ rectangular (0.9×2.2)→ rectangular (0.8×2.2)→0.8×2.2mm rectangular material, finally undergo online straightening annealing, with an annealing temperature of 600℃ to 720℃.
