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Method for preparing Ti-6Al-7Nb medical titanium alloy spherical powder

A technology of ti-6al-7nb and spherical powder, which is applied in the field of metal and alloy powder preparation, can solve the problem of high production cost and inability to effectively solve the problem of high flow rate of powder, high purity, no satellite powder, no hollow powder, and difficult to scale up Production and other problems, to achieve good fluidity, improve production efficiency and fine powder yield, pure melting effect

Inactive Publication Date: 2016-06-01
SINO EURO MATERIALS TECH OF XIAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the production methods of Ti-6Al-7Nb alloy spherical powder mainly include inert gas atomization method, radio frequency plasma powder spheroidization method and plasma atomization method, etc., but these methods cannot effectively solve the problem of high flow rate and high purity of powder at the same time. Degree, no satellite powder, no hollow powder and other problems, and the production cost is huge, it is difficult to apply to large-scale production

Method used

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  • Method for preparing Ti-6Al-7Nb medical titanium alloy spherical powder
  • Method for preparing Ti-6Al-7Nb medical titanium alloy spherical powder
  • Method for preparing Ti-6Al-7Nb medical titanium alloy spherical powder

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Embodiment 1

[0028] Embodiment 1: Preparation of Ti-6Al-7Nb alloy spherical powder

[0029] The percentage by weight is: Al5.58%, Nb6.8%, Ta0.45%, Fe0.21%, O0.13%, C0.06%, N0.04%, H0.007%, the rest is Ti, the total The melting and casting raw materials with a weight of 50kg are sequentially subjected to vacuum induction melting and vacuum arc remelting to obtain Ti-6Al-7Nb master alloy ingots;

[0030] Secondly, through the forging process of the master alloy rod, through the machining of the lathe and the precision CNC lathe, a Ti-6Al-7Nb alloy electrode rod with a diameter of 50mm and a length of 850mm is obtained, and the surface roughness is 1.6μm;

[0031] Place the obtained electrode rod in the electrode rod installation chamber 2, and evacuate the atomization chamber 1 until the vacuum degree of the equipment reaches 1.5×10 -3 Pa filled inert gas mixed with argon and helium, the inert gas pressure in the equipment is 1×10 5 Pa;

[0032] Turn on the atomization equipment to prep...

Embodiment 2

[0035] Embodiment 2: Preparation of Ti-6Al-7Nb alloy spherical powder

[0036] The percentage by weight is: Al6.12%, Nb7.21%, Ta0.41%, Fe0.20%, O0.11%, C0.07%, N0.04%, H0.008%, the rest is Ti, the total The melting and casting raw materials with a weight of 50kg are sequentially subjected to vacuum induction melting and vacuum arc remelting to obtain Ti-6Al-7Nb master alloy ingots;

[0037]Secondly, through the forging process of the master alloy rod, through the machining of the lathe and the precision CNC lathe, a Ti-6Al-7Nb alloy electrode rod with a diameter of 80mm and a length of 700mm is obtained, and the surface roughness is 1.6μm;

[0038] Place the obtained electrode rod in the electrode rod installation chamber 2, and evacuate the atomization chamber 1 until the vacuum degree of the equipment reaches 1.0×10 -3 Pa filled inert gas mixed with argon and helium, the inert gas pressure in the equipment is 2×10 5 Pa;

[0039] Turn on the atomization equipment to prep...

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Abstract

The invention provides a method for preparing Ti-6Al-7Nb medical titanium alloy spherical powder. The preparation method comprises the following steps: preparing materials of alloy components according to ASTM F1295 standards and carrying out two times of vacuum melting on a mother alloy ingot; preparing the mother alloy ingot into an alloy electrode bar through forging and machining; carrying out pre-vacuumizing treatment on atomization equipment and introducing mixed inert protective gas; conveying the electrode bar into an atomization chamber through a feeding system and heating the end face of the electrode bar by using a plasma torch; preparing metal liquid drops by using a centrifugal effect of a rotary electrode and instantly condensing the metal liquid drops into spherical metal powder; after cooling the high-nitrogen stainless steel spherical powder, removing non-metal impurities through an electrostatic impurity removing device; and finally, carrying out powder package by adopting multilayered vacuum heat sealing. The method provided by the invention has the characteristics of high production efficiency, strong batch stability, high fine powder yield and the like; and the Ti-6Al-7Nb medical titanium alloy spherical powder with high sphericity degree, good purity, strong mobility and smooth and clean surface can be easily prepared.

Description

technical field [0001] The invention belongs to the technical field of metal and alloy powder preparation, in particular to a method for preparing Ti-6Al-7Nb medical titanium alloy spherical powder. Background technique [0002] Ti-6Al-7Nb alloy was developed by Swiss Sulzer Medical Technology Company in the 1980s, and then released the first general standard Sn-056512, and jointly promoted mass production and application with the British IMI Titanium Company, the brand is IMI367, in 2001 At that time, the total consumption in the global medical field has exceeded 200 tons. In 1987, the US Food and Drug Administration (FDA) approved the Ti-6Al-7Nb alloy standard ASTMF1295-01 promulgated by the American Society for Testing and Materials; the International Standardization Committee also promulgated the corresponding standard ISO5832-11-1994 in 1994, my country in the same year The subject of developing Ti-6Al-7Nb alloy was proposed, and then GB / T23102 Surgical Implant Standard...

Claims

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Application Information

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IPC IPC(8): B22F9/10B22F1/00C22C14/00
CPCB22F9/10B22F1/0007C22C14/00
Inventor 赵霄昊陈富璐周丹官海波王琦相敏莫茗菎左振博王庆相梁书锦张平祥
Owner SINO EURO MATERIALS TECH OF XIAN CO LTD
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