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Method for deoxidizing Al-Nb-Ti alloy

An al-nb-ti alloy technology, applied in the field of deoxidation of Al-Nb-Ti alloys, can solve the problems of increased manufacturing cost and time, unable to completely eliminate residual Ca, and deoxidation methods that are not described or implied, and achieve low cost effect

Active Publication Date: 2017-09-08
KOBE STEEL LTD
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Problems solved by technology

However, in this patent document 3, the use of niobium material is not described, and there is no description or hint about the deoxidation method of the Ti-Al-Nb alloy.
In addition, according to the technology described in Patent Document 3, two processes of adding and melting Ca, and removing Ca and melting for homogenization are required, and since residual Ca cannot be completely eliminated, the production cost time increases while remaining Ca It is possible to cause changes in various characteristics

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  • Method for deoxidizing Al-Nb-Ti alloy
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  • Method for deoxidizing Al-Nb-Ti alloy

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Embodiment Construction

[0023] In order to use the low-quality niobium material with a high oxygen content, the present inventors obtained a Ti-Al-Nb alloy (a Ti-Al-Nb alloy mainly composed of titanium as an active metal) with a targeted composition and a low oxygen content. alloys), and has been intensively studied.

[0024] As a result, the following idea was reached. It is technically and costly difficult to simultaneously reduce the oxygen content while controlling the desired composition, that is, an alloy composition mainly composed of titanium. After the Al-Nb-Ti alloy with a small content and mainly composed of aluminum, it is possible to mix the Al-Nb-Ti alloy with a low oxygen content and pure Ti with a low oxygen content obtained by a normal production method in an appropriate amount. A Ti—Al—Nb alloy mainly composed of titanium having a desired composition can be obtained relatively easily and at low cost.

[0025] Then, the present inventors found that the oxygen concentration (solid so...

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Abstract

To reduce the oxygen content of an Al-Nb-Ti alloy containing 50-75 mass% of Al, 5-30 mass% of Nb, and 80 mass% or less as the total of Al and Nb, the Al-Nb-Ti alloy being produced using an alloy material that comprises an Al material, an Nb material, and a Ti material and contains a total of 0.5 mass% or more of oxygen, by using a dissolution method using a water-cooled copper container to dissolve and hold the Al-Nb-Ti alloy in a 1.33 Pa-2.67*105 Pa atmosphere at a temperature of 1900K or higher.

Description

technical field [0001] The present invention relates to deoxidation of an Al-Nb-Ti alloy produced by removing oxygen from an Al-Nb-Ti alloy made of an alloy material composed of aluminum, niobium, and titanium and containing 0.5% by mass or more of oxygen in total method. Background technique [0002] In recent years, the demand for Ti-Al-based alloys as metal materials for aircraft and automobiles has been increasing. Among them, the demand for Ti-Al-Nb-based alloys in which Nb is further added to Ti-Al to further improve oxidation resistance is increasing. When producing such titanium alloys such as Ti-Al-Nb alloys whose main component is active metal titanium, it is indispensable to prevent contamination from oxygen during melting. Vacuum arc melting (VAR) and electron beam melting have traditionally been used. (EB), plasma arc melting (PAM), vacuum induction melting (VIM), water-cooled copper crucible induction melting (CCIM) and other melting methods. [0003] Among ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22B9/10C22B9/20C22C21/00
CPCC22B9/10C22B9/20C22C1/02C22C21/00C22C1/026
Inventor 松若大介工藤史晃出浦哲史石田齐坂本浩一
Owner KOBE STEEL LTD
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