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The preparation method of fe-cr-co type alloy strip magnet

A kind of fe-cr-co, 1.fe-cr-co technology, applied in the direction of inductance/transformer/magnet manufacturing, furnace type, manufacturing tools, etc., can solve the problem of high cost, difficult production of millimeter-level thickness sheets, hard magnetic low ability

Active Publication Date: 2017-04-05
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by this invention is: provide the preparation method of Fe-Cr-Co type alloy strip magnet, it is a kind of preparation method of Fe-Cr-Co type alloy strip magnet adding Si and / or Ti, its key The Fe-Cr-Co type alloy is subjected to multi-stage aging treatment directly after the thin strip is obtained by rapid quenching of the melt, so as to obtain a Fe-Cr-Co type alloy thin film with high coercive force and high practicability in micron thickness. With magnets, it overcomes the difficulties, high cost, and low efficiency of the existing technology to prepare thin sheets with a thickness of millimeters. However, the thin sheets obtained by the double-roller quick quenching method are still relatively thick and the hard magnetic properties of the product are low.

Method used

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  • The preparation method of fe-cr-co type alloy strip magnet
  • The preparation method of fe-cr-co type alloy strip magnet
  • The preparation method of fe-cr-co type alloy strip magnet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The first step, raw material preparation:

[0049] According to the mass percentage of 62Fe-25Cr-12Co-1Ti, the component raw materials of pure Fe, Co, Ti and Cr-Fe alloy containing 62wt% Cr-38wt% Fe are weighed to complete the raw material preparation, and the purity of all component raw materials is mass Percentage≥99.9%;

[0050] The second step is to prepare Fe-Cr-Co type master alloy ingot:

[0051] Put all the raw materials prepared in the first step into the crucible of the vacuum arc melting furnace. When melting, first vacuumize the furnace body to 5×10 -2 Below Pa, the furnace temperature rises above the highest melting point of the raw material metal until all the raw material metal is completely melted to obtain a uniformly smelted 62Fe-25Cr-12Co-1Ti melt, and then the melt is cooled in a water-cooled copper crucible to obtain Fe -Cr-Co type master alloy ingot, that is, 62Fe-25Cr-12Co-1Ti master alloy ingot;

[0052] figure 1 The examples shown show that ...

Embodiment 2

[0061] The first step, raw material preparation:

[0062] According to the mass percentage of 62.5Fe-24Cr-12Co-1.5Si, the component raw materials pure Fe, Co, Si and the Cr-Fe alloy containing 62wt%Cr-38wt%Fe are weighed to complete the preparation of raw materials, and the purity of all component raw materials is uniform. For the mass percentage ≥ 99.9%;;

[0063] The second step is to prepare Fe-Cr-Co type master alloy ingot:

[0064] Put all the raw materials prepared in the first step into the crucible of the vacuum induction melting furnace, and evacuate the furnace body to 5×10 -2 Below Pa, the furnace temperature rises to be higher than the highest melting point of the raw material metal until all the raw material metal is completely melted to obtain a uniformly smelted 62.5Fe-24Cr-12Co-1.5Si melt, and then the melt is cooled in a water-cooled copper crucible to produce Obtain Fe-Cr-Co type master alloy ingot, that is, 62.5Fe-24Cr-12Co-1.5Si master alloy ingot;

[00...

Embodiment 3

[0074] The first step, raw material preparation:

[0075] According to the mass percentage 62Fe-24Cr-12Co-1Si-1Ti, weigh the component raw materials pure Fe, Co, Si, Ti and Cr-Fe alloy containing 62wt% Cr-38wt% Fe, thus completing the raw material preparation, all component raw materials Purity is mass percentage ≥ 99.9%;

[0076] The second step is to prepare Fe-Cr-Co type master alloy ingot:

[0077] Put all the raw materials prepared in the first step into the crucible of the vacuum arc melting furnace. When melting, first vacuumize the furnace body to 5×10 -2 Below Pa, the furnace temperature rises to be higher than the highest melting point of the raw material metal until all the raw material metal is completely melted to obtain a smelted uniform 62Fe-24Cr-12Co-1Si-1Ti melt, and then the melt is cooled in a water-cooled copper crucible to produce Obtain Fe-Cr-Co type master alloy ingot, that is, 62Fe-24Cr-12Co-1Si-1Ti master alloy ingot;

[0078] Figure 11 The exampl...

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Abstract

The invention discloses a preparation method of a Fe-Cr-Co alloy thin strip magnet, and relates to iron-base alloy containing chromium and cobalt and the preparation method of the Fe-Cr-Co alloy thin strip magnet with Si and / or Ti added. The preparation method includes the steps of preparing raw materials according to the mass percent of (60.5-0.5y+z)Fe-(27.5-x-0.5y-z)Cr-12Co-xSi-yTi, wherein x ranges from 0 to 1.5, y ranges from 0 to 1, z ranges from 0.5 to 2, and x and y can not be equal to 0 at the same time; preparing a Fe-Cr-Co type mother alloy ingot; preparing a Fe-Cr-Co type alloy thin strip; conducting multi-step aging on the Fe-Cr-Co type alloy thin strip to prepare the Fe-Cr-Co alloy thin strip magnet with high coercivity, high practicability and micron-sized thickness. The preparation method overcomes the defects that in the prior art, when thin slices with millimeter-size thickness are prepared, production difficulty is high, cost is high, efficiency is low and product magnetic hardness is low.

Description

technical field [0001] The technical scheme of the invention relates to an iron-based alloy containing chromium and cobalt, specifically a method for preparing a Fe-Cr-Co type alloy strip magnet. Background technique [0002] With the rapid development of the electronic information industry, along with the diversification of products, the demand for small, thin, high-performance magnetic materials with good plasticity and toughness is increasingly strong. [0003] Fe-Cr-Co type alloy is a kind of machinable permanent magnet material, which has the characteristics of low raw material cost, high ductility, good corrosion resistance, excellent high temperature stability and good magnetic properties. The traditional preparation method of Fe-Cr-Co type alloy is: smelting-rolling-solution treatment-magnetic field heat treatment-aging, for small and thin Fe-Cr-Co type alloy workpieces in the order of millimeters, repeated rolling is required and machining, deformation will occur d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/02C21D6/00C21D9/52
Inventor 孙继兵武鑫步绍静段秀丽于庆莲崔春翔安瑞
Owner HEBEI UNIV OF TECH
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