Patent ID: 11959160
Assignee: UNIVERSITY OF SHANGHAI FOR SCIENCE AND TECHNOLOGY
Field: Medical technology (Instruments)
Classification: CPC C  A | IPC A  C

Claim 1:
2. The copper-niobium alloy for a medical biopsy puncture needle according to claim 1, wherein the needle core and the needle tube are processed as follows:
(1) using granular materials with a purity greater than or equal to 99.99% for smelting to obtain a copper-niobium alloy ingot with a diameter of 60-100 mm;
(2) cutting off a riser and finishing a surface of the ingot;
(3) placing the ingot in a high temperature furnace for heat treatment at 900-1,000° C. for 1-2 h, and forging the ingot to a round bar with a diameter of 10-30 mm;
(4) conducting solution quenching treatment on the round bar at 900-1,000° C. for 2-4 h; and
(5) conducting needle core forming: drawing the round bar processed in step (4) in multiple passes to the needle core of a design specification, and conducting annealing at 550-650° C. for 1-2 h; and, conducting needle tube forming: drilling the round bar processed in step (4), and conducting continuous operations of tube reducing, continuous rolling, and heat treatment to finally obtain the needle tube of a design specification.