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Aluminum-niobium interalloy and preparation method thereof

An intermediate alloy and alloy technology, applied in the field of intermediate alloy and its preparation, can solve the problems of poor uniformity and high alloy impurity content, and achieve the effect of good uniformity, uniform composition, and control of the introduction of impurities

Active Publication Date: 2013-09-11
上海康臣特种金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current master alloy is usually smelted by one-step method. The smelted alloy not only has high impurity content, but also has poor uniformity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The weight of ingredients is in Kg, Nb 2 o 5 100Kg, Al104Kg, CaF 2 31Kg, KClO 3 Weigh each raw material at 32.5Kg; add another weighed 15KgAl in step 3), and the alloy composition obtained through two-step smelting is as follows:

[0028] Nb is 47.5%, Fe is 0.09%, O is 0.04%, C is 0.03%, Si is 0.05%, B is 0.004%, N is 0.02%, H is 0.005%; the balance is Al; among them, the percentage here is a percentage by weight.

[0029] The first step of the two-step smelting method in this embodiment is smelting outside the furnace.

Embodiment 2

[0031] The weight of ingredients is in Kg, Nb 2 o 5 100Kg, Al55Kg, CaF 2 16.3Kg, KClO 3 Weigh each raw material at 12Kg; add another weighed 5KgAl in step 3), and the alloy composition obtained after two-step smelting is as follows:

[0032] Nb is 75.17%, Fe is 0.06%, O is 0.05%, C is 0.04%, Si is 0.05%, B is 0.004%, N is 0.002%, H is 0.005%; the balance is Al; among them, the percentage here is a percentage by weight.

[0033] The first step of the two-step smelting method in this embodiment is vacuum smelting in a furnace.

Embodiment 3

[0035] The weight of ingredients is in Kg, Nb 2 o 5 100Kg, Al65.1Kg, CaF 2 15.5Kg, KClO 3 Weigh each raw material at 14.55Kg; add another weighed 4.25KgAl in step 3), and the alloy composition obtained through two-step smelting is as follows:

[0036] Nb is 68.12%, Fe is 0.06%, O is 0.04%, C is 0.05%, Si is 0.02%, B is 0.002%, N is 0.002%, H is 0.005%; the balance is Al; among them, the percentage here is a percentage by weight.

[0037] The first step of the two-step smelting method in this embodiment is vacuum smelting in a furnace.

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Abstract

The invention discloses an aluminum-niobium interalloy which comprises the following components in percentage by weight: 45-70% of Mo, at most 0.2% of Fe, at most 0.1% of O, at most 0.1% of C, at most 0.2% of Si, at most 0.005% of B, at most 0.03% of N, at most 0.005% of H and the balance of Al. The invention also provides a preparation method of the aluminum-niobium interalloy. By using the two-step method for smelting, compared with the existing out-furnace smelting method, the invention can obtain more uniform composition, and since Al is respectively added twice in the two steps, the uniformity of the composition is better than that of one-step addition. In addition, by adopting a unique smelting method of using a carbon crucible coated with an yttrium oxide layer as a smelting container in the vacuum furnace, compared with the existing method of using a water-cooling copper crucible, the invention greatly lowers the manufacturing cost, and can well control the introduction of impurities.

Description

technical field [0001] The invention relates to a master alloy and a preparation method thereof, in particular to an aluminum-niobium master alloy for smelting and a preparation method thereof. Background technique [0002] With the continuous development of titanium alloys, it has become more and more common to use intermediate alloys to add to the smelting of titanium alloys. For the added master alloy, it is required to have no segregation, no metal inclusions, and the impurity content should be as low as possible. [0003] The current master alloy is smelted by one-step method, and the smelted alloy not only has high impurity content, but also has poor uniformity. Contents of the invention [0004] The purpose of the present invention is to provide an aluminum-niobium master alloy and a preparation method thereof. The impurity content of the aluminum-niobium master alloy can meet the requirement of titanium alloy smelting and addition, and the preparation method of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C27/02C22C1/02C22C1/03
Inventor 陆树兴
Owner 上海康臣特种金属材料有限公司
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