Preparation process of medical Ti-6Al-7Nb alloy wires for manufacturing Kirschner wires

A technology of ti-6al-7nb and alloy wire is applied in the field of preparation of titanium alloy, which can solve the problems of high price and difficult realization of alloy preparation.

Active Publication Date: 2015-07-15
宝鸡鑫诺新金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the production and research of alloy wires for medical Ti-6Al-7Nb Kirschner wires have not been reported, and domestic clinical applications are all imported, a

Method used

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  • Preparation process of medical Ti-6Al-7Nb alloy wires for manufacturing Kirschner wires
  • Preparation process of medical Ti-6Al-7Nb alloy wires for manufacturing Kirschner wires
  • Preparation process of medical Ti-6Al-7Nb alloy wires for manufacturing Kirschner wires

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Experimental program
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Embodiment Construction

[0031] The medical Ti-6Al-7Nb alloy wire production process that is used to manufacture Kirschner wire, it implements according to the following steps:

[0032] (1) Melting ingot

[0033] Use "0" grade special sponge titanium as raw material, use pure Al beans and pure Nb lath as alloy elements, according to the famous alloy composition of Ti-6Al-7Nb grade, press electrode group welding, and smelt three times in vacuum consumable electric arc furnace into ?370*Lmm alloy ingot;

[0034] (2), blank forging

[0035] The ingot is heated to the β-phase area by an electric furnace, and it is kept warm to make it completely burnt through (reaching a heat conduction speed of 0.6-0.7mm / min). Under the high pressure of a 2,500-ton hydraulic press, the large deformation (three upsetting and three pulling) reaches 200*200mm square, surface defects Grinding, and then forging to ?80*Lmm round billet (deformation greater than 60%).

[0036] (3), hot rolling

[0037] The ?80*Lmm round bil...

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Abstract

The invention provides a preparation process of medical Ti-6Al-7Nb alloy wires for manufacturing Kirschner wires. Special class-0 titanium sponge is adopted, honorary alloy composition burdening is performed according to marks, electrodes are pressed for assembly and welding, three-time smelting is performed through a vacuum consumable electro-arc furnace to form fai 370 mm alloy ingots; a metallographic phase method is adopted to measure (alpha+beta)/beta phase transformation points (TB) of the alloy ingots; the alloy ingots are subjected to surface scalping, riser ingot bottoms are cut off, a beta phase zone is heated through an electric furnace, cogging and forging are performed through a 2500-tons oil press, surface defect coping is performed, and further a two-phase zone is heated; two-time rolling is performed to form fai 9.5 mm rod and wire blanks, the rod and wire blanks are heated to be lower than the phase transformation points and are repeatedly subjected to heating and multiple-die drawing to form wires commonly used for Kirschner wires of fai 4.0 mm and under through a 30KW drawing machine and a 11 KW drawing machine, and annealing, straightening, polishing and heat treatment are performed. For the high-strength Ti-6Al-7Nb Kirschner wires serving as a medical material for human, the safety and reliability of the wires are especially important. The work-hardening capacity of the Ti-6Al-7Nb wires is the key of high strength achievement through heat treatment strengthening.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal processing, in particular to the preparation of titanium alloys. Background technique [0002] Ti-6Al-7Nb alloy is a widely used and promising alloy for human implants. It has high strength, excellent corrosion resistance, biocompatibility, basically harmless to the human body, and also has the advantages of strong plasticity and excellent abrasiveness. It is precisely because of the potential harmful effects of V in Ti-6Al-4V alloys for conventional human implants that the development of Ti alloys for biological use without V is promoted, and Ti-6Al-7Nb alloys should be conceived. The characteristic of this alloy is that Nb is used instead of V. Its mechanical properties are equivalent to those of Ti-6Al-4V, and its plane fracture toughness is about 10% higher than that of Ti-6Al-4V. Alloy Trends. [0003] At present, there is no report on the production and research of alloy wires fo...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22F1/18B21C37/04
Inventor 陈建军郑永利
Owner 宝鸡鑫诺新金属材料有限公司
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