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A feal soft magnetic alloy with high magnetostriction coefficient

A technology of magnetostriction coefficient and soft magnetic alloy, which is applied in the field of oscillator components and FeAl soft magnetic alloy, can solve the problems that hinder the miniaturization and light weight of modern devices, cannot meet application requirements, and difficult machining, and achieve good machining. Good performance, good plasticity, comprehensive performance improvement effect

Active Publication Date: 2017-01-04
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the alloy is very brittle and difficult to machine, which hinders the development of miniaturization and light weight of modern devices, and cannot meet the application requirements.

Method used

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  • A feal soft magnetic alloy with high magnetostriction coefficient
  • A feal soft magnetic alloy with high magnetostriction coefficient
  • A feal soft magnetic alloy with high magnetostriction coefficient

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Experimental program
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preparation example Construction

[0043] The concrete preparation method of the FeAl soft magnetic alloy of high magnetostriction coefficient of the present invention comprises the following steps:

[0044] a) Proportioning the raw materials and melting the alloy in a vacuum induction furnace;

[0045] b) High temperature forging, the forging temperature is 1150±20℃;

[0046] c) Continuously hot rolling the forged block to 2.5-3.5mm;

[0047] d) Warm rolling processing of plates to 0.2-0.4mm;

[0048] e) Use a muffle furnace to soften the alloy, and then oil quench, that is, heat the alloy to 650±20°C in the air with the furnace, and keep it warm for 120±10min;

[0049] f) Processing and sampling;

[0050] g) Vacuum heat-treat the alloy at 950±20°C, keep it warm for 120±10min, and at the same time, apply a DC magnetic field with a magnetic field strength of 40±5Oe;

[0051] h) Perform corresponding performance tests on the alloy samples treated according to steps a-g.

Embodiment

[0053] The chemical composition of the present invention is used to prepare FeAl soft magnetic alloy with high magnetostriction coefficient taking into account both magnetic properties and processability, and its chemical composition is shown in Table 1 (Example 1, Example 2 and Example 3). For the convenience of comparison, the FeAl alloy (comparative example) prepared by the prior art is also listed in Table 1 at the same time.

[0054] Table 1 Chemical Composition of Smelted Alloy (wt.%)

[0055] Al Mg Tb Mn Si C P S Fe Example 1 11.6 0.010 5.0 0.10 0.11 0.03 0.010 0.010 margin Example 2 14.0 0.005 5.9 0.05 0.12 0.02 0.010 0.008 margin Example 3 16.3 0.002 6.8 0.08 0.10 0.03 0.005 0.009 margin comparative example 13.6 — — 0.10 0.15 0.03 0.009 0.010 margin

[0056] The preparation process adopted for the alloy of the above composition: vacuum induction melting alloy→forging billet→hot rol...

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Abstract

The invention belongs to the field of precision alloy functional materials, in particular to a FeAl soft magnetic alloy with high magnetostriction coefficient, high plasticity and easy processing, which can be used as high frequency transformer, magnetic head and magnetostrictive transducer, underwater acoustic and ultrasonic processing oscillator components, etc. The chemical composition (weight%) of the alloy is Al 11.6-16.3%, Mg 0.002-0.010%, Tb 5.0-6.8%, Mn≤0.10, Si≤0.15, C≤0.03, P≤0.010, S≤0.010, and the rest For Fe. Through the addition of Tb and Mg elements and the corresponding alloy treatment process, the magnetostriction coefficient of the alloy can reach up to 52, the room temperature elongation and area reduction can be increased by up to 1 times, and the tensile strength and yield strength of the alloy can be increased by 18‑20 %. The alloy has excellent magnetostrictive properties, good plasticity and easy processing, and has good high-temperature oxidation resistance, sulfuration resistance and corrosion resistance. Compared with the existing technology, the comprehensive performance of FeAl soft magnetic alloy has been significantly improved, and the improvement of processing performance has promoted the development of miniaturization and light weight of modern devices, which further meets the application requirements.

Description

technical field [0001] The invention belongs to the field of precision alloy functional materials, in particular to a FeAl soft magnetic alloy with high magnetostrictive coefficient, good plasticity and easy processing, which can be used as high-frequency transformers, magnetic heads, magnetostrictive transducers, underwater acoustic and ultrasonic processing. oscillator components, etc. Background technique [0002] FeAl alloys are inexpensive because they do not contain Ni and Co precious metals, and at the same time, they can obtain a series of good soft magnetic properties with the change of Al content. Among them, FeAl soft magnetic alloys with Al mass fraction of 11.6-16.3% have properties such as high resistivity, low density and high hardness. [0003] FeAl alloy is a single-phase solid solution (α phase) with body-centered cubic crystal, FeAl soft magnetic alloy with Al content of 12.8-14.0 wt.%, tends to form an ordered structure when slowly cooled in the temperat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/147C22C38/06C22C33/04
Inventor 吴滨卢凤双张敬霖于一鹏李增张建生张建福
Owner CENT IRON & STEEL RES INST
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