Manufacturing method for medical high-performance nickel-titanium alloy guide needle material

Abstract

The invention relates to the technical field of manufacturing of biomedical metal materials, in particular to a manufacturing method for a medical high-performance nickel-titanium alloy guide needle material. The method comprises the following steps that cast ingot smelting and selection are conducted, and a consumable electrode of a vacuum consumable skull furnace is installed and welded by usinga pure titanium rod and a pure nickel rod; after smelting by the vacuum consumable skull furnace, peeling and riser removal of a cast ingot, installing and welding an electrode of a vacuum consumablesmelting furnace, smelting by the vacuum consumable smelting furnace, inspecting the cast ingot, peeling and riser removal, the components are analyzed, the casting ingot is smelted, a nickel-titanium alloy thin rod is manufactured by using the cast ingot, the forged rod is heated in an electric furnace, and precision forging is carried by a rotary forging machine; and then the thin rod is placedon a warm drawing machine, a powdery lubricant is selected for medium-temperature drawing, finally different annealing processes are formulated according to different product performance requirements, vacuum annealing is conducted, and the rod is polished, processed and formed. The obtained guide needle has excellent tension resistance, good plasticity, excellent super-elasticity and anti-fatigueperformance.

Description

technical field [0001] The invention relates to the technical field of biomedical metal material manufacturing, in particular to a method for manufacturing a high-performance medical nickel-titanium alloy guide needle material. Background technique [0002] Nickel-titanium alloys have been applied in the biomedical field due to their good biocompatibility, corrosion resistance and excellent shape memory properties. It is widely used in vascular stents, oral orthopedics, and spinal orthopedics. Bone guide pins and bone pins commonly used in orthopedic surgery, due to the complex stress situation, not only need to be rotated and positioned by torque force, but also by the combined action of bending force and traction force, which requires the manufacturing material not only to have excellent tensile strength Performance and good plasticity, but also have good superelasticity and fatigue resistance. The main design basis for the composition and performance range of nickel-tit...

AI Technical Summary

Problems solved by technology

Vacuum induction furnaces and water-cooled copper crucible vacuum induction furnaces are mostly used for melting the alloy at home and abroad. Due to the high chemical activity of the alloy, the crucible material of the vacuum induction furnace is polluted during the melting process, so the control of O, H.C is very difficult. The composition consistency is poor, which is the reason why this type of alloy has been unstable in China

Although the water-cooled copper crucible vacuum induction furnace can solve this problem, due to its limited capacity, it cannot industrially produce relatively large ingots and pouring processing material blanks. Therefore, a high-performance medical nickel-titanium alloy guide needle is proposed to solve the above problems. How the material is made