A kind of platinum-nickel alloy superfine wire and its preparation method and application

Abstract

The invention discloses a platinum-nickel alloy superfine wire material, a preparation method and an application thereof, which belong to the technical field of nonferrous metal alloy processing. The Ni content of the ultra-fine wire is 5wt.%-15wt.%, the balance is Pt, the diameter is 1200-1500MPa in tensile strength, and the elongation is 3%-20%. The preparation method is as follows: use platinum and nickel as raw materials, use a vacuum induction melting furnace to melt, refine, and vacuum cast to obtain a platinum-nickel alloy ingot; use a groove rolling mill to roll the ingot to form a platinum-nickel alloy bar Drawing the rods into thin wires through a wire drawing machine, and performing intermediate heat treatment; performing secondary drawing processing on the thin wires to obtain secondary drawn wires; and then performing continuous annealing to obtain ultra-fine wires. The platinum-nickel alloy ultra-fine wire has excellent comprehensive performance, not only has a good developing effect, but also has high mechanical properties, has a strong ability to maintain plasticity, has a smooth surface, and has good flexibility, which can meet the use of the PTCA guide wire developing spring Require.

Description

Technical field [0001] The present invention belongs to the field of colored metal alloy processing, and more particularly to a platinum nickel alloy ultrafine material and a preparation method thereof. Background technique [0002] PTCA (Percutaneous Transluminal Coronary Angioplasty) is a referred to as the peripheral angioplasty, refers to a coronary artery or an implanted stent using a balloon expanded stenosis, and has a blood flow. The emergency PTCA bracket implantation technology is widely used in the treatment of patients with acute myocardial infarction of coronary heart disease. The treatment effect is more reliable than drug treatment, and it is simple and traumatic, which has become a major patient with acute myocardial infarction of coronary heart disease. One of therapeutic measures. [0003] As the guidance of the PTCA surgical delivery system, it is a "track" to provide "track" by a coronary stenosis or occlusion loss to the distal end of the blood vessel, and pr...

AI Technical Summary

Problems solved by technology

In order to facilitate the doctor to accurately grasp the length and position of the guide wire entering the blood vessel during the operation, a development design is usually made on the front end of the guide wire, such as using a pure gold or platinum coil, but there are problems of low strength, poor plasticity, and high price; Some guide wires use spring coils made of titanium-nickel alloy and platinum-tungsten alloy wire. Although they have a certain developing effect and high strength, they have problems such as poor elasticity or poor biocompatibility.

[0004] The guide wire of the PTCA surgical delivery system requires extremely thin wire diameter at the developing end and high comprehensive performance requirements. The domestic ultra-fine wire industry is mainly dominated by foreign manufacturers, and the core technology of production is also mainly mastered by foreign manufacturers. The domestic production capacity is far away. Unable to meet the demand, especially in the field of ultra-fine wire used in the medical industry, the products are mainly imported from manufacturers such as Germany, the United States, and Japan