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Novel fe-al alloy and method for producing same

A manufacturing method and alloy technology, applied in the direction of manufacturing tools, magnetic materials, furnace types, etc., can solve problems such as unknown methods

Inactive Publication Date: 2008-01-30
大神田佳平 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, with regard to the production method of Fe-Al alloy having an Al content of about 12% by weight or less, few methods other than the above are known.

Method used

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  • Novel fe-al alloy and method for producing same
  • Novel fe-al alloy and method for producing same
  • Novel fe-al alloy and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0058] The following examples are given to illustrate the present invention, but the present invention is not limited to these examples.

reference example 1

[0060] A predetermined amount of electrolytic iron and 99.99% by weight of Al were weighed so that the Al content (composition 1-6) shown in Table 1 was used, and these were dissolved at high frequency using a porous Teman tube. After dissolving, make it suck and solidify between transparent quartz with an inner diameter of 4mmφ, and make a rod-shaped alloy sample. This rod-shaped alloy sample was hot-rolled at 900° C., plastically processed into a sheet shape (thickness 1 mm×2 mm×30 mm), and then annealed at 900° C. for 1 hour. After the annealing treatment, it was cooled to 550° C. at a cooling rate of 1° C. / min, and cold rolling was performed under various working conditions of 5, 10, 20, and 50% reduction in area at room temperature.

[0061] [Table 1]

[0062] Al content (weight%)

[0063] The various cold-rolled Fe—Al alloys thus obtained were heated using a differential scanning calorimeter (DSC), and the amount of heat energy generated during heating was m...

Embodiment 1

[0064] Example 1 Evaluation of processing characteristics

[0065] In such a way that the Al content reaches 8% by weight, a predetermined amount of pure iron and 99.9% by weight of Al are weighed and dissolved in a high-frequency vacuum (the final composition is Al: 7.78% by weight, C: 0.004% by weight, Si: 0.02% by weight %, Mn: 0.05% by weight, P: 0.005% by weight, S: 0.002% by weight, Cr: 0.02% by weight, Ni: 0.05% by weight, and Fe: the balance). After dissolving, hot rolling processing was carried out at 1100° C. for 200×100×4000 mm, and then a part thereof was cut out, and further hot rolling processing was carried out at 1100° C. to a thickness of 4 mm. Next, after performing an annealing treatment at 700° C. for 1 hour, it was air-cooled to normal temperature. The cooled alloy was subjected to cold rolling at 20° C. under various working conditions such that the area reduction rate was 50%. Then, after performing an annealing treatment at 800° C. for 1 hour, it w...

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Abstract

An object of the present invention is to provide a Fe—Al alloy having an Al content of 12% by weight or less, which is excellent in properties such as workability, insulation, magnetic permeability, vibration suppression, and high strength. The Fe-Al alloy is produced through the following steps: (i) plastic working of an alloy containing 2 to 12% by weight of Al, with the balance being Fe and unavoidable impurities, (ii) cold rolling the plastic worked alloy The step of working, and (iii) the step of annealing the cold-rolled alloy.

Description

technical field [0001] The present invention relates to a Fe—Al alloy having excellent properties such as workability, insulation, magnetic permeability, vibration damping, and high strength, and a method for producing the alloy. Background technique [0002] Conventionally, Fe—Cr—Al alloys, Mn—Cu alloys, Cu alloys, Mg alloys, and the like are known as metals having vibration damping properties and workability, and are used in various applications. Among them, Fe-Al alloys with an Al content of 6 to 10% by weight and an average grain size of 300 to 700 μm are known to have excellent vibration damping properties and are useful as vibration damping alloys (for example, refer to Patent Document 1). . This Fe—Al alloy is produced by cooling at a predetermined cooling rate after performing plastic working and annealing treatment. [0003] However, few methods other than the above are known for methods of producing Fe—Al alloys having an Al content of about 12% by weight or less...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/46C22C38/00C22C38/06
CPCC21D9/46C21D8/0205C22C38/004C21D8/0273C22C38/06C21D6/00H01F1/147
Inventor 大神田佳平
Owner 大神田佳平