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Method for producing magnetostrictive material and method for increasing amount of magnetostriction

A technology of magnetostrictive materials and manufacturing methods, applied in the manufacture/assembly of magnetostrictive devices, material selection for magnetostrictive devices, piezoelectric effect/electrostrictive or magnetostrictive motors, etc., capable of Solve the problem that the magnetostriction cannot be fully controlled, and achieve the effect of increasing the magnetostriction

Active Publication Date: 2016-11-23
HIROSAKI UNIVERSITY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the method described in Patent Document 1, since the method is cast in a state close to the size and shape at the time of use (centrifugal casting, etc.), it has the advantage that it can be completed with a small number of machining steps such as cutting, but there are the following technologies Problem: It hardly applies plastic processing, but only relies on heat treatment and composition, so it cannot fully control the magnetostriction that strongly depends on the structure, strain, and defects of crystallization, and the magnetostriction obtained stably is at most 90 ppm degree

Method used

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  • Method for producing magnetostrictive material and method for increasing amount of magnetostriction
  • Method for producing magnetostrictive material and method for increasing amount of magnetostriction
  • Method for producing magnetostrictive material and method for increasing amount of magnetostriction

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Embodiment 1

[0047] The alloy material consisting of Co, the remainder of Fe, and unavoidable impurities shown in Table 1 was smelted in an Ar gas flow of 7 kg, and cast into a mold to produce an ingot of approximately 80 mmφ (test (1 in Table 1) )~(5) Melting process).

[0048] Next, in the tests (1) to (4) in Table 1, the ingots were kept in a gas-fired heating furnace at 1000 to 1100°C for 1 hour and then out of the furnace, and they were formed into approximately 15mm thick plates by using an air hammer for hot forging ( Hot forging process).

[0049] Then, in the tests (1) and (2) of Table 1, a 15 mm thick plate was formed into a 0.3 mm thick plate by a cold roll mill (cold rolling process). Furthermore, in the test (2) of Table 1, the furnace body was cooled (heat treatment process) after keeping it at 800 degreeC for 1 hour in an electric furnace.

[0050] In addition, in tests (3) and (4) of Table 1, a 15mm thick plate was held at approximately 1100°C for 1 hour in an electric furnace, ...

Embodiment 2

[0060] The alloy material consisting of each mass% of Co shown in Table 2 and Table 3; each mass% of Nb, Mo, V, Ti or Cr; the remaining part of Fe and inevitable impurities is smelted in an Ar atmosphere to 7kg, and cast To the mold, an ingot of approximately 80 mmφ is produced (melting process).

[0061] Next, the ingot is kept in a gas combustion heating furnace at 1000 to 1100°C for 1 hour, and then taken out of the furnace, and is formed into approximately 16 mmφ with an air hammer for hot forging (hot forging process).

[0062] Then, it is cold-drawn into a wire of approximately 8 mmφ (cold-drawing step). Furthermore, after maintaining in an electric furnace at 800°C for 1 hour, the furnace body was cooled (heat treatment step).

[0063] In this way, a magnetostrictive material is manufactured.

[0064] A JIS14A No. 4 mmφ tensile test piece and a magnetostrictive measurement sample of 8 mm in length × 5 mm in width × 0.3 mm in thickness were made from the manufactured magnetostr...

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Abstract

Provided are a method for producing a magnetostrictive material and a method for increasing the amount of magnetostriction with which it is possible to increase the amount of magnetostriction in a magnetostrictive material used in vibration power generation, force sensors, etc., which make use of the inverse magnetostriction phenomenon. A magnetostrictive material having an amount of magnetostriction of 100 ppm or more is produced by dissolving and casting an alloy material comprising a composition of 67-87 mass% Co and a balance of Fe and inevitable impurities, and then performing hot forging. Furthermore, a magnetostrictive material having an amount of magnetostriction of 130 ppm or more can be produced by performing cold rolling after the hot forging. Heat treatment at 400-1000 DEG C can also be performed after hot processing or cold processing.

Description

Technical field [0001] The invention relates to a method for manufacturing a magnetostrictive material and a method for increasing the amount of magnetostriction. Background technique [0002] Magnetostrictive materials are used in vibration power generation or force sensors that use the reverse magnetostriction phenomenon, which is the change of the magnetic field in the magnetic body by strain generated by applying stress from the outside. [0003] Furuya et al. proposed Fe-Co alloys that improved the material fragility and workability of Tb-Dy-Fe alloys (Terfenol-D) and FeGa alloys (Galfenol) that have been tried so far for vibration power generation magnetostrictive alloys. (Co: 56 to 80 at%) and its heat treatment method (see Patent Document 1). [0004] Prior art literature [0005] Patent literature [0006] Patent Document 1: Japanese Patent Publication No. 2013-177664 Summary of the invention [0007] (1) Technical problems to be solved [0008] However, in the method describe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/10C22C19/07H02N2/00C22F1/00H10N35/01H10N35/00H10N35/85
CPCC22C19/07C22F1/10H02N2/00H10N35/85H10N35/01H10N35/101
Inventor 古屋泰文山浦真一中岛宇史江幡贵司佐藤武信
Owner HIROSAKI UNIVERSITY