阅读说明：本技术 制备钒铝合金的方法 (Method for preparing vanadium-aluminum alloy ) 是由 尹丹凤 陈海军 师启华 叶明峰 于 2020-06-03 设计创作，主要内容包括：本发明属于冶金领域,具体涉及一种高品质钒铝合金的生产方法。本发明所要解决的技术问题是利用AlV55废合金制备钒铝合金的方法,包括以下步骤：将AlV55废合金和铝混匀进行精炼,得到钒铝合金。本发明利用AlV55废合金制备钒铝合金的方法制备得到的钒铝合金品质良好。(The invention belongs to the field of metallurgy, and particularly relates to a production method of a high-quality vanadium-aluminum alloy. The invention aims to solve the technical problem that a method for preparing vanadium-aluminum alloy by utilizing AlV55 waste alloy comprises the following steps: and uniformly mixing the AlV55 waste alloy and aluminum, and refining to obtain the vanadium-aluminum alloy. The vanadium-aluminum alloy prepared by the method for preparing the vanadium-aluminum alloy from the AlV55 waste alloy has good quality.)

1. The method for preparing the vanadium-aluminum alloy is characterized by comprising the following steps: the method comprises the following steps: and uniformly mixing the AlV55 waste alloy and aluminum, and refining to obtain the vanadium-aluminum alloy.

2. The method for preparing the vanadium-aluminum alloy according to claim 1, characterized in that: the AlV55 scrap alloy was formed during the cooling process for the preparation of AlV55 alloy, and consisted of an Al3V phase and Al8V5 phase.

3. The method for preparing vanadium-aluminum alloy according to claim 1 or 2, characterized in that: the V content of the AlV55 waste alloy is 50.5-53.5%.

4. The method for preparing the vanadium-aluminum alloy according to any one of claims 1 to 3, wherein: the granularity of the AlV55 waste alloy is 1-10 mm.

5. The method for preparing the vanadium-aluminum alloy according to any one of claims 1 to 4, wherein: the aluminum accounts for 0.0958-0.1262 times of the mass of the AlV55 waste alloy.

6. The method for preparing the vanadium-aluminum alloy according to any one of claims 1 to 5, wherein: the granularity of the aluminum is 1-10 mm.

7. The method for preparing the vanadium-aluminum alloy according to any one of claims 1 to 6, wherein: the vacuum degree of refining is 0.01-0.1 Pa; the vacuum refining time is 10-15 min.

8. The method for preparing the vanadium-aluminum alloy according to any one of claims 1 to 7, wherein: the vanadium-aluminum alloy contains 45-49% of vanadium.

9. The method for preparing the vanadium-aluminum alloy according to any one of claims 1 to 8, wherein: in the vanadium-aluminum alloy, Fe is less than or equal to 0.2%, Si is less than or equal to 0.2%, C is less than or equal to 0.05%, N is less than or equal to 0.02%, O is less than or equal to 0.1%, H is less than or equal to 0.01%, S is less than or equal to 0.02%, and P is less than or equal to 0.03%.

Technical Field

The invention belongs to the field of metallurgy, and particularly relates to a method for producing a high-quality vanadium-aluminum alloy by utilizing an AlV55 waste alloy.

Background

The vanadium-aluminum alloy is used as an important additive of the titanium alloy, and can obviously improve the properties of the titanium alloy, such as strength, toughness, formability, corrosion resistance, high temperature resistance and the like. With the rapid development of aerospace industry in China, the titanium alloy applied to the aerospace field is greatly increased.

The domestic vanadium-aluminum alloy is mainly applied to civil use. The market for aerospace grade vanadium-aluminum Alloys has been kept under firm control to date mainly by the american latin Alloys company (Reading Alloys), the american strategic minerals company (Stratcor), the german electrometallurgical company (GfE) and the ultraredmet company under the austria Stork Group flag, wherein the german GfE company is at the world leading level in quality by producing aerospace grade vanadium-aluminum Alloys in a two-step process (which implements the GfE enterprise standard).

Patent 201410065632.6 discloses a method for preparing aerospace-grade vanadium-aluminum alloy, which does not need to tie a furnace body, and the aerospace-grade vanadium-aluminum alloy containing 45-55% of vanadium is obtained by vacuum refining after 75-85% of vanadium-aluminum alloy is prepared by a metal thermal method.

Disclosure of Invention

The invention aims to solve the technical problem of providing a method for preparing vanadium-aluminum alloy. The method comprises the following steps: and uniformly mixing the AlV55 waste alloy and aluminum, and refining to obtain the vanadium-aluminum alloy.

In the method for preparing the vanadium-aluminum alloy, the AlV55 waste alloy is formed in the cooling process of preparing the AlV55 alloy and consists of an Al3V phase and an Al8V5 phase.

Further, in the method for preparing the vanadium-aluminum alloy, the V content of the AlV55 waste alloy is 50.5-53.5%.

Further, in the method for preparing the vanadium-aluminum alloy, the granularity of the AlV55 waste alloy is 1-10 mm.

In the method for preparing the vanadium-aluminum alloy, the aluminum accounts for 0.0958-0.1262 times of the mass of the AlV55 waste alloy.

Further, in the method for preparing the vanadium-aluminum alloy, the granularity of the aluminum is 1-10 mm.

In the method for preparing the vanadium-aluminum alloy, the vacuum degree of refining is 0.01-0.1 Pa. The vacuum refining time is 10-15 min.

In the method for preparing the vanadium-aluminum alloy, the vanadium-aluminum alloy contains 45-49% of vanadium.

Further, in the method for preparing the vanadium-aluminum alloy, Fe is less than or equal to 0.2 percent, Si is less than or equal to 0.2 percent, C is less than or equal to 0.05 percent, N is less than or equal to 0.02 percent, O is less than or equal to 0.1 percent, H is less than or equal to 0.01 percent, S is less than or equal to 0.02 percent, and P is less than or equal to 0.03 percent.

According to the invention, the AlV55 waste alloy which is only used as a coolant or a vanadium-containing material in the past is used as a raw material for preparing the high-quality vanadium-aluminum alloy, and the high-quality vanadium-aluminum alloy is produced by a vacuum refining method, so that the product added value of the waste alloy can be improved, the step of producing the high-vanadium-aluminum alloy is also omitted compared with the traditional two-step method, and the production cost is greatly reduced. The main component of the vanadium-aluminum alloy prepared by the method is equivalent to AlV50 alloy produced by Degao GfE company in a two-step method, and the quality is good. The vanadium-aluminum alloy disclosed by the invention contains 45-49% of vanadium, less than or equal to 0.2% of Fe, less than or equal to 0.2% of Si, less than or equal to 0.05% of C, less than or equal to 0.02% of N, less than or equal to 0.1% of O, less than or equal to 0.01% of H, less than or equal to 0.02% of S, less than or equal to 0.03% of P.

Detailed Description

The invention provides a method for preparing high-quality vanadium-aluminum alloy at lower cost. Because the AlV55 alloy has Al3V phase, because of its low V content and low density, it is easy to form waste alloy with low V content and serious oxidation phenomenon with the brittle phase Al8V5 which is easy to oxidize during cooling. The common treatment method is to use the alloy as a coolant after the alloy is stripped and crushed from the alloy cake and then returned to the furnace, but the amount of the coolant required by alloy smelting is not large, and a more efficient treatment method of AlV55 waste alloy is still needed.

The method for preparing the vanadium-aluminum alloy with higher quality by using the part of waste alloy as the raw material comprises the following steps: (a) crushing the AlV55 waste alloy; (b) mixing materials: adding a certain amount of aluminum into the crushed AlV55 waste alloy, and uniformly mixing; (c) vacuum refining: and melting and refining the uniformly mixed materials in a vacuum induction furnace, cooling the materials by cooling water after refining is finished, and disassembling the furnace when the temperature is reduced to room temperature to obtain the high-quality vanadium-aluminum alloy containing 45-49% of vanadium.

Wherein the V content of the AlV55 waste alloy in the step (a) is 50.5-53.5%.

Further, the granularity of the crushed AlV55 waste alloy in the step (a) is 1-10 mm. The melting speed is slow when refining is carried out due to overlarge granularity, the crushing energy consumption is high due to undersize granularity, and the environment pollution is easily caused due to dust.

Wherein the certain amount of aluminum in the step (b) is 0.0958-0.1262 times of the mass of the AlV55 waste alloy.

Further, the granularity of the aluminum in the step (b) is 1-10 mm.

Wherein, the refining vacuum degree in the step (c) is 0.01-0.1 Pa, the vacuum refining time is 10-15 min, and cooling water is introduced for cooling after refining is finished.

Furthermore, the high-quality vanadium-aluminum alloy in the step (C) has Fe less than or equal to 0.2%, Si less than or equal to 0.2%, C less than or equal to 0.05%, N less than or equal to 0.02%, O less than or equal to 0.1%, H less than or equal to 0.01%, S less than or equal to 0.02%, and P less than or equal to 0.03%.