Method for preparing Fe-Ga-In-Tb alloy by double-feeding vacuum induction smelting

A fe-ga-in-tb, vacuum induction melting technology, which is applied in the field of functional material preparation, can solve the problems of poor casting performance and low magnetostrictive performance of Fe-Ga alloy, and achieve improved alloying performance and small alloy size. , The effect of small burning loss

Inactive Publication Date: 2013-04-24
NANCHANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method adopts a new type of giant magnetostrictive component system, which can solve the shortcomings of Fe-Ga alloy prepared by traditional preparation methods such as low magnetostrictive performance and poor casting performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Fe and Ga with a purity of 99.99%, In with a purity of 99.99% and Tb with a purity of 99.99% are used as raw materials, and the target composition is formulated to be Fe 100?(x+y+Z) Ga x In y Tb Z %。 Master alloy, where x is 4at.%, y is 0.01 at.%, z is 0.01 at.%.

[0041] Place high-purity Fe in a quartz crucible with no holes at the bottom, then place the crucible in the induction coil in a vacuum furnace, and place high-purity Tb, Ga, and In in the feeding bin, circulate cooling water, and close the furnace door, first use the vacuum mechanical pump and Roots pump to evacuate the vacuum furnace to 1×10 2 Below Pa, use a diffusion pump to evacuate the vacuum furnace to 10 -2 Below Pa. Then feed high-purity Ar gas until the pressure in the furnace is less than 0.05Pa. Then turn on the power, and preheat the quartz crucible and the alloy with a current of 500A for a period of time, which may be 2 minutes, and then increase the current to the set value. Since...

Embodiment 2

[0048] (1) Fe and Ga with a purity of 99.99%, In with a purity of 99.99% and Tb with a purity of 99.99% are used as raw materials, and the target composition is formulated to be Fe 100?(x+y+Z) Ga x In y Tb Z %, where x is 26 at.%, y is 2 at.%, and z is 2 at.%.

[0049] Place high-purity Fe in a quartz crucible with no holes at the bottom, then place the crucible in the induction coil in a vacuum furnace, and place high-purity Tb, Ga, and In in the feeding bin, circulate cooling water, and close the furnace door, first use the vacuum mechanical pump and Roots pump to evacuate the vacuum furnace to 1×10 2 Below Pa, use a diffusion pump to evacuate the vacuum furnace to 10 -2 Below Pa. Then feed high-purity Ar gas until the pressure in the furnace is less than 0.05Pa. Then turn on the power, and preheat the quartz crucible and the alloy with a current of 500A for a period of time, which may be 2 minutes, and then increase the current to the set value. Since the melting p...

Embodiment 3

[0056] (1) Fe and Ga with a purity of 99.99%, In with a purity of 99.99% and Tb with a purity of 99.99% are used as raw materials, and the target composition is formulated to be Fe 100?(x+y+Z) Ga x In y Tb Z %, where x is 18 at.%, y is 0.5 at.%, and z is 0.5 at.%.

[0057] Place high-purity Fe in a quartz crucible with no holes at the bottom, then place the crucible in the induction coil in a vacuum furnace, and place high-purity Tb, Ga, and In in the feeding bin, circulate cooling water, and close the furnace door, first use the vacuum mechanical pump and Roots pump to evacuate the vacuum furnace to 1×10 2 Below Pa, use a diffusion pump to evacuate the vacuum furnace to 10 -2 Below Pa. Then feed high-purity Ar gas until the pressure in the furnace is less than 0.05Pa. Then turn on the power, and preheat the quartz crucible and the alloy with a current of 500A for a period of time, which may be 2 minutes, and then increase the current to the set value. Since the melti...

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Abstract

The invention relates to a method for preparing an Fe-Ga-In-Tb alloy by double-feeding vacuum induction smelting. According to the method, high-purity Fe, Ga, In and Tb are used as raw materials to prepare the mother alloy of which the target composition is Fe100-(x+y+z)GaxInyTbz. The method comprises the following steps: putting high-purity iron in a quartz crucible without holes in the bottom, and carrying out induction smelting by using a vacuum induction smelting furnace; after the iron is molten, adding In, Tb and Ga by in a double-feeding mode, and continuing applying power for smelting; and taking out, putting in a quartz crucible with a hole in the bottom, resmelting in the vacuum induction smelting furnace, and casting. In the casting process, a lifting accelerator is utilized, so that the alloy solution acquires a certain inertia, and thus, the alloy solution can be completely cast into a high-volume red copper mold to be subjected to forced cooling. The resmelting is repeated 3-4 times, so that the smelted alloy has more uniform composition. The alloy prepared by the method provided by the invention has the advantages of low burning loss, smooth surface, uniform composition and obviously higher casting properties.

Description

technical field [0001] The invention relates to a method for preparing Fe-Ga-In-Tb alloy by a vacuum induction melting method, which belongs to the functional material preparation technology in the field of material processing engineering. Background technique [0002] Giant magnetostrictive material (GMM) refers to a functional material whose length changes greatly under the action of a changing magnetic field. Giant magnetostrictive materials are another important functional material after rare earth permanent magnet materials and rare earth high temperature superconducting materials. It is more than 5 times larger than the electrostrictive strain of piezoelectric ceramics, and it can withstand high pressure and high energy conversion efficiency. Therefore, GMM is regarded as a strategic functional material to improve a country's high-tech comprehensive competitiveness in the 21st century. It has broad applications in the fields of high-power underwater communications, hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/06C22C38/00
Inventor 晏建武
Owner NANCHANG INST OF TECH
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