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Two-step method for vacuum annealing of iron-nickel soft magnetic alloy

An iron-nickel soft magnetic alloy and vacuum technology, applied in heat treatment equipment, heat treatment process control, manufacturing tools, etc., can solve the problems of substandard electromagnetic compatibility experiments, affecting the electromagnetic properties of products, and poor magnetic properties of alloys, etc. Deformation amount, improvement of electromagnetic performance, effect of ensuring assembly conditions

Active Publication Date: 2012-10-10
SHAANXI CHANGLING ELECTRONICS TECH
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Problems solved by technology

[0004] The annealing method in which the annealing medium is vacuum is the current general technology, which can meet the magnetic performance requirements of some alloys in iron-nickel soft magnetic alloys, such as 1J46, 1J50 and other alloys with low nickel content, and for 1J79, 1J85 with high nickel content, etc. Iron-nickel soft magnetic alloy, the existing technology is difficult to meet its magnetic performance requirements, often resulting in poor magnetic performance of the alloy, in the debugging of parts and equipment, the magnetic loss is large, and the electromagnetic compatibility test is not up to standard, which affects the improvement of the electromagnetic performance of the product

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  • Two-step method for vacuum annealing of iron-nickel soft magnetic alloy
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  • Two-step method for vacuum annealing of iron-nickel soft magnetic alloy

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Embodiment Construction

[0032] The specific content of the two-step vacuum annealing method for iron-nickel soft magnetic alloy will be further explained below in conjunction with the accompanying drawings, taking iron-nickel soft magnetic alloy 1J85 as an example.

[0033] 1J85 refers to an iron-nickel soft magnetic alloy with a nickel content of 79.0% to 81.0%. The sample size used in this experiment is as follows figure 1 As shown, the thickness of the sample is: 0.8mm, the state is: cold-drawn strip, and the standard chemical composition of the sample is shown in Table 1:

[0034] Table 1 standard chemical composition

[0035] C

mn

Cu

Ni

Si

Mo

P.S.

Fe

0.03

0.30～0.60

≤0.20

79.0～81.0

0.15～0.30

4.80～5.20

0.02

margin

[0036] The heat treatment process has a great influence on the DC magnetic properties or low-frequency magnetic properties of 1J85 Fe-Ni soft magnetic alloy, but has little ...

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Abstract

The invention provides a vacuum annealing method for iron-nickel soft magnetic alloy. The method comprises two annealing processes; the primary annealing process is a conventional vacuum annealing process, wherein the cooling speed of an ordering area is controlled when in alloy cooling, and the ordering area is a temperature range of transforming alloy from order into disorder; and the secondary annealing process is a two-section continuous vacuum annealing process which is used for stabilizing the magnetic performance of the alloy. The method can remarkably improve the magnetic performance of the iron-nickel soft magnetic alloy and can reduce the deformation of the alloy, thereby being suitable for batch production.

Description

technical field [0001] The invention relates to the technical field of vacuum heat treatment of iron-nickel soft magnetic alloy, in particular to a vacuum annealing method of iron-nickel soft magnetic alloy. Background technique [0002] According to the requirements of GBn197, the general requirements for the preparation of iron-nickel soft magnetic alloys in the current heat treatment industry are: when the annealing medium is hydrogen, it should be treated in purified hydrogen with a dew point not higher than -40°C; when the annealing medium is vacuum, it should be processed The residual pressure is not greater than 1×10 -3 mm Hg vacuum for processing. [0003] The protective annealing method in which the annealing medium is hydrogen is suitable for processing samples in the laboratory. The processing equipment has high requirements and the processing conditions are relatively harsh. At present, it has not been popularized in the heat treatment industry and is not suitab...

Claims

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Application Information

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IPC IPC(8): C21D1/26C21D1/773C21D11/00
Inventor 宋帆程维中
Owner SHAANXI CHANGLING ELECTRONICS TECH
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