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Anti-corrosion FeNiCo magnetically soft alloy with high magnetic induction intensity

A technology of magnetic induction and soft magnetic alloys, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems that cannot fully meet the requirements of device miniaturization, fast response, low sensitivity of electromagnetic devices, poor processing and manufacturing performance, etc. , to achieve the effect of improving anti-corrosion properties, benefiting magnetization, and good magnetic permeability

Active Publication Date: 2013-07-03
BEIJING BEIYE FUNCTIONAL MATERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In traditional soft magnetic alloys, although FeCo alloys have high saturation magnetic induction, their magnetic permeability is very low and coercive force is high, resulting in low sensitivity of electromagnetic devices; FeAl, FeCr series commonly used soft magnetic alloys although It has a certain saturation magnetic induction, but their working magnetic induction is not high enough under the condition of low external magnetic field and small trigger current, and cannot fully meet the requirements of device miniaturization and fast response
The processing and manufacturing performance of FeAl alloy is poor, and it is generally not easy to process; although the medium-nickel FeNi soft magnetic alloy has good magnetic permeability and high saturation magnetic induction, its corrosion resistance is not good, and it cannot be used in complex environments. use
At present, in the published literature, there is no soft magnetic alloy that has high magnetic induction, high magnetic permeability, low coercive force, high stability and good corrosion resistance under low external magnetic field after conventional heat treatment.

Method used

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  • Anti-corrosion FeNiCo magnetically soft alloy with high magnetic induction intensity
  • Anti-corrosion FeNiCo magnetically soft alloy with high magnetic induction intensity
  • Anti-corrosion FeNiCo magnetically soft alloy with high magnetic induction intensity

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The alloy composition (mass percentage) is C: 0.01%, Si: 0.74%, Mn: 0.18%, Ni: 31.99%, Co: 29.12%, Mo: 3.0%, Cu: 0.2%, Ce: 0.02, and the rest is Fe. After smelting and pouring in a vacuum induction furnace, the alloy is heat-preserved at 1200°C, and then hot-forged into a 40mm×200mm slab; After the strip blank is cold-rolled to 2.0mm, it is softened by an intermediate annealing at 1050°C and then cold-rolled into a 0.5mm thick strip. After the cold-rolled strip is heat-treated, the relevant properties are tested. The heat treatment process adopted is: 1180°C×5h, cooled to 700°C at a cooling rate of 150°C / h and quickly cooled to room temperature. 2 Protect. The obtained performance is shown in Table 4:

[0029] Table 4

[0030]

[0031] After vibrating at an acceleration of 3g, the change rate of coercive force Hc of the alloy is 2.56%.

[0032] 50 hours salt spray corrosion corrosion rate is 0.0198mm / a

Embodiment 2

[0034] Alloy composition (mass percentage) is C: 0.01%, Si: 0.50%, Mn: 0.15%, Ni: 30.70%, Co: 30.23%, Mo: 4.0%, Cu: 0.3%, La: 0.01%, Re: 0.01 %, the rest is Fe. After smelting and pouring in a vacuum induction furnace, the alloy is kept at 1220°C, and then hot forged into a 40mm×200mm slab; After the strip blank is cold-rolled to 2.2mm, it is softened by intermediate annealing at 1000°C and then cold-rolled into a 0.5mm thick strip. The cold-rolled strips were subjected to vacuum heat treatment to test related properties. The heat treatment process adopted was: 1150°C×6h, cooled at a cooling rate of 200°C / h to 650°C and quickly cooled to room temperature. The obtained performance is shown in Table 5:

[0035] table 5

[0036]

[0037] After vibrating at an acceleration of 10g, the change rate of the coercive force Hc of the alloy is 2.62%.

[0038] 50 hours salt spray corrosion corrosion rate is 0.0163mm / a

Embodiment 3

[0040] Alloy composition (mass percentage) is C: 0.01%, Si: 0.70%, Mn: 0.13%, Ni: 34.23%, Co: 26.26%, Mo: 3.10%, Cu: 0.32, Ce: 0.01%, Re: 0.01% , and the rest is Fe. After smelting and pouring in a vacuum induction furnace, the alloy is kept at 1150°C and forged into a Ф55mm forging rod with a fast forging machine. After the forged rod is heat-treated, the relevant properties are tested. The heat treatment process adopted is: 1000°C×8h, cooled at a cooling rate of 50°C / h to 700°C and quickly cooled to room temperature. 2 Protect. The obtained performance is shown in Table 6:

[0041] Table 6

[0042]

[0043] After vibrating at an acceleration of 20g, the change rate of the coercive force Hc of the alloy is 2.65%.

[0044] The 50-hour salt spray corrosion corrosion rate is 0.0189mm / a.

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Abstract

The invention includes a FeNiCo magnetically soft alloy and a production method thereof, wherein the FeNiCo magnetically soft alloy has high magnetic induction intensity, high magnetic permeability, low coercive force, high stability and good corrosion resistance in a low magnetic field. The FeNiCo magnetically soft alloy comprises the following components by mass percent: not more than 0.02 percent of C, 0.2-0.80 percent of Si, not more than 0.50 percent of Mn, 29.00-35.00 percent of Ni, 25.00-32.00 percent of Co, not more than 5.00 percent of Mo, not more than 0.50 percent of Cu, 0.01-0.55 percent of microelements including 0.001-0.05 percent of rare earth elements, and the balance of Fe and inevitable impurities. The FeNiCo magnetically soft alloy is processed and manufactured by adopting the methods of vacuum melting, forging, hot rolling and cold rolling, and after heat treatment, the FeNiCo magnetically soft alloy has the characteristics of high magnetic induction intensity, high magnetic permeability, low coercive force, high stability and good corrosion resistance in a low magnetic field, and can be manufactured into the transducer, the filter, the electromagnetic valve, the transformer and the like in the field of aviation, aerospace, navigation, electron, electric power and the like.

Description

technical field [0001] The invention relates to a FeNiCo soft magnetic alloy, in particular to a soft magnetic alloy with high induction intensity, high magnetic permeability, low coercive force, high stability and good corrosion resistance under a relatively low external magnetic field. Background technique [0002] Soft magnetic alloys are widely used in aviation, aerospace, navigation, military and civilian fields. With the improvement of industrial automation technology and the trend of miniaturization and light weight of devices in various fields, the comprehensive performance requirements of soft magnetic alloys are also getting higher and higher. The requirements of miniaturization, high sensitivity, complex use environment and stable performance of devices require soft magnetic alloy materials to produce high magnetic induction intensity under low external magnetic field; easy magnetization and demagnetization mean that the material must have High magnetic permeabil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/147C22C38/16
Inventor 陈岳雷成辉王兵徐明舟
Owner BEIJING BEIYE FUNCTIONAL MATERIALS CORP
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