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Deoxidation method of 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: 2019-10-01
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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Embodiment Construction

[0023] In order to use the low-quality niobium material with high oxygen content, the inventors obtained a Ti-Al-Nb alloy (Ti-Al-Nb based on active metal titanium) with a targeted composition and low oxygen content. Alloys), and conducted intensive research.

[0024] As a result, the following idea was achieved. While controlling to the desired composition, that is, the alloy composition with titanium as the main component, while reducing the oxygen content, it is technically and costly difficult. On the other hand, if the process is divided, the production of oxygen After the Al-Nb-Ti alloy with low content and aluminum as the main component, the Al-Nb-Ti alloy with low oxygen content is mixed with pure Ti with low oxygen content obtained by the usual manufacturing method. Is it possible? A Ti-Al-Nb-based alloy mainly composed of titanium of a desired composition can be obtained easily and at low cost.

[0025] Therefore, the present inventors found that the oxygen concentration ...

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Abstract

For an Al-Nb-Ti alloy produced using an alloy material composed of Al material, Nb material, and Ti material containing 0.5% by mass or more of oxygen in total, at a temperature of 1900K or higher, 1.33Pa to 2.67×10 5 In an atmosphere of Pa, the oxygen content is reduced by melting and holding by a smelting method using a water-cooled copper container, wherein the Al-Nb-Ti alloy contains 50 to 75% by mass of Al and 5 to 30% by mass of Nb , and the total amount of Al and Nb is 80% by mass or less.

Description

Technical field [0001] The present invention relates to the deoxidation of Al-Nb-Ti-based alloys that remove oxygen from Al-Nb-Ti-based alloys made of alloy materials composed of aluminum materials, niobium materials and titanium materials and containing 0.5% by mass or more of oxygen in total method. Background technique [0002] In recent years, the demand for Ti-Al alloys as raw metal materials for airplanes and automobiles is increasing. Among them, the demand for Ti-Al-Nb-based alloys that further increase the oxidation resistance by adding Nb to Ti-Al is particularly high. Such titanium alloys, such as Ti-Al-Nb based alloys with active metal titanium as the main component, are indispensable to prevent oxygen contamination during melting. Vacuum arc melting (VAR) and electron beam melting are traditionally used. (EB), plasma arc melting method (PAM), vacuum induction melting method (VIM), water-cooled copper crucible induction melting method (CCIM) and other melting method...

Claims

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Application Information

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Patent Type & Authority Patents(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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