CN101456143A - Thinning technique of high-performance iron chromium cobalt permanent magnetic alloy material - Google Patents
Thinning technique of high-performance iron chromium cobalt permanent magnetic alloy material Download PDFInfo
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- CN101456143A CN101456143A CNA2007101508478A CN200710150847A CN101456143A CN 101456143 A CN101456143 A CN 101456143A CN A2007101508478 A CNA2007101508478 A CN A2007101508478A CN 200710150847 A CN200710150847 A CN 200710150847A CN 101456143 A CN101456143 A CN 101456143A
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Abstract
The invention relates to a process for grinding a high-performance Fe-Cr-Co permanent magnet alloy material, which belongs to the field of metallurgy metallic material and metal processing. The process comprises a forging process, wherein if the surface of a forged blank has laminated micro-cracks, the blank needs to be ground to avoid the influence on the subsequent processing.
Description
Technical field
The invention belongs to metallurgical metal material and metal manufacture field.
Background technology
Along with developing rapidly of dynamo-electric industry and information industry, for product diversification incident for various abnormity, slim, can adopt any means process and the demand of the high performance magnetic material of other special shapes vigorous day by day.
Existing Fe-Cr-Co series deformable permanent magnetic alloy material, workable permanent magnetic material or because magnetic property is low or because cost an arm and a leg, and limited use, restricted the industry application.
Problem to be solved by this invention is to overcome above-mentioned defective, invented the Fe-Cr-Co deformable permanent magnetic alloy material of high-performance low cobalt content, this material promptly has the favorable mechanical performance, has high magnetic property again, and because the content of cobalt is low, price is low, replace the expensive SmCo system that can not process, NdFeB system etc., make it be widely used in fields such as electronics industry, nautical devices, automobile instrument, electrical engineering, computer, relay, duplicator, burglar alarm, sensor, high-performance compass, precision instrumentation.
Summary of the invention
On traditional Fe-Cr-Co deformable permanent magnetic alloy material basis, reduce the content of cobalt, in alloying element, add metallic element, improve the processing performance and the magnetic property of alloy.
The development pressure processing craft comprises forging, hot rolling (hot piercing), cold rolling strap, hand-drawn wire, drawn tube etc.
The present invention compared with prior art has significant advantage and beneficial effect: have high-coercive force, high energy product, magnetic property is higher than normally used aluminium nickel cobalt, and contains that the cobalt amount is low to save material, and the most significant is good processability, can make the element of different shape, magnetic property is stable.But extensive use precision instrument, magnetic localizer, the contour performance magnetic element of motor.Reduce raw-material consumption, make of the development of China's magnetic material, meet the policy of national sustainable development to the high-end field.
The specific embodiment
Principle
The Fe-Cr-Co alloy is an age-hardening type alloy, be on the basis of Fe-Cr bianry alloy, to add Co according to the Spinodal resolution theory to grow up, from the FeCrCo ternary phase diagrams, find out, high temperature (as 1300 ℃) solution treatment obtains the α phase of single body-centered cubic structure, the cooling back forms supersaturated solid solution fast, is decomposed to form (the α of two body-centered cubic structures during lonneal
1+ α
2) phase, α
1Be rich in Fe-Co mutually, be ferromagnetism phase, α
2Be rich in Fe-Cr mutually, be weak magnetic phase, two kinds of period profile that alternate form modulation structure, because the single domain effect, and obtain high magnetic property.The decomposition of the supersaturated solid solution of this class alloy is an anisotropic, and promptly the direction of easy axis of being separated out by supersaturated solid solution of selecting the superior mutually distributes.In the decomposable process of supersaturated solid solution, apply magnetic field (or stress) then the decomposition of precipitated phase will be subjected to the influence of external magnetic field and direction of easy axis simultaneously, if apply magnetic field along the monocrystal easy magnetizing axis, precipitated phase is arranged along this direction standard.Apply the processing of magnetic field, magnetic field during tempering and make ferromagnetic α
1The magnetic direction that hands down is separated out, thereby has further improved magnetic.
Performance evaluation
According to mainly containing three phases among the Metallographic Analysis Fe-Cr-Co, more than 1300 ℃ the α phase of body-centered cubic lattice structure, ferromagnetism is the face-centered cubic lattice structure below 1300 ℃.Phase, σ is mutually hard and crisp, and is totally unfavorable to processing, and occurs the σ phase below 1000 ℃, γ is mutually nonmagnetic, and is unfavorable to magnetic property.Therefore reduce solid solubility temperature by adding alloying element, improve processability, improve magnetic property.
Add the influence of metallic element.
Main content is Fe in the Fe-Cr-15Co alloy, adds metallic element one by one, reduces solid solubility temperature and improves processability, improves magnetic property.Need reasonably add according to the effect of alloying element, obtain a kind ofly both can improve processing characteristics, can improve the new material of magnetic property again.
Determine alloying component
Add alloying element in sum and be not only and improve technology, the more important thing is and expanded the composition range of forming permanent-magnet alloy, Cr-Co content is reduced significantly, still can obtain higher magnetic property.It is generally acknowledged that Fe-Cr-Co is that the magnetic property of alloy is very responsive to chemical composition,, everyly can after solution treatment, obtain single and uniform α phase, can carry out α → (α when handle in supersaturated solid solution magnetic field according to the magnetic hardening characteristics of this alloy
1+ α
2) change, finally form α
1+ α
2The two-phase alternate cycle distributes, (amplitude modulation) structure generally can both obtain higher magnetic property, therefore, the alloy structure that obtains high-coercive force should be a phase region, and can not be limited to several isolated one-tenth branches, in this alloy system, select rational Cr-Co proportioning, when reducing Cr, Co content, still keep high magnetic property, the transformation of σ phase will be suppressed so, and processing characteristics will obviously be improved.
Adding alloying element in the Fe-Cr-Co alloy has good effect, can reduce solid solubility temperature, improves processability, has enlarged the scope of the composition of high-coercive force.
Processing technology
Smelting process
The Fe-Cr-Co permanent-magnet alloy must adopt vacuum induction melting, vacuum≤10-3 torr, and this is because will control nitrogen content.
Forging Technology
The forging that strips off the skin after the smelting, the Forging Technology of this alloy is three of a key of the present invention, and this alloy forging requires tighter to heating-up temperature, and charging temperature is heated to one and regularly is incubated a period of time (size of temperature retention time examination stove and steel ingot is fixed).Owing to reduced Cr, Co content, processing characteristics has obtained obvious improvement.
Thinning technique
If the blank after forging surface has the lamination fine fisssure must reconditioning otherwise influence the processing of back.
Hot rolling or hot piercing
Hot-rolled temperature is a charging temperature, is incubated after being heated to predetermined temperature, is rolled into thickness and is 3.5-4.5mm, and wide is the 150-250mm band, chilling, and hot rolling tep reel volume can not be too tight, otherwise can not through hardening during hardening;
Gren rod technology is the same with the hot rolling band, is rolled into Φ 5.5mm wire rod through too high line.
Hot poling is more difficult than hot rolling wire rod or hot rolling band, bear simultaneously in the blank process compression, extension, with distortion, higher to material requirements, technology is stricter.
Piercing process: the pipe car becomes optical wand, goes into stove, heats up insulation, the cooling of perforation back with stove.
Cold working
The hot rolling band is cold worked into needed thickness through reconditioning.Because this alloy material welding performance is poor, the hot rolling band can only spot welding pieces together that to involve in row cold rolling, and the cold rolling finished product roll coil of strip is heavy little.
Annealing process: annealing back pickling.
Acid cleaning process: reconditioning, be processed into needed specification through cold rolling-annealing-cold-drawn multi-pass.
At present the specification of seamless pipe is generally accomplished more than the wall thickness 0.4-0.5mm, because pipe fitting distortion when having approached very much the back and doing magnetic property.
Solid solution treatment process is with element heating, insulation, the cooling of making.
Magnetic field treatment process is incubated after magnetic field intensity is carried out the magnetic field processing for default magnetic field, is heated to preset temperature.
Tempering process, temperature adopts the ladder tempering process.Satisfy high performance requirements.
The mechanical performance of alloy, this alloy has the favorable mechanical performance, is fit to deformation processing, machining, deep drawability is good, the alloy metallographic structure.
Claims (1)
1. high-performance iron chromium cobalt permanent magnetic alloy material and thinning technique thereof comprise forging process, wherein, if the surface of the blank after the forging has the lamination fine fisssure must reconditioning otherwise influence the processing of back.Improve working (machining) efficiency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101508478A CN101456143A (en) | 2007-12-10 | 2007-12-10 | Thinning technique of high-performance iron chromium cobalt permanent magnetic alloy material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101508478A CN101456143A (en) | 2007-12-10 | 2007-12-10 | Thinning technique of high-performance iron chromium cobalt permanent magnetic alloy material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101456143A true CN101456143A (en) | 2009-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2007101508478A Pending CN101456143A (en) | 2007-12-10 | 2007-12-10 | Thinning technique of high-performance iron chromium cobalt permanent magnetic alloy material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111805305A (en) * | 2019-11-29 | 2020-10-23 | 中国航发沈阳黎明航空发动机有限责任公司 | Method for machining part with deep hole chromium layer |
-
2007
- 2007-12-10 CN CNA2007101508478A patent/CN101456143A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111805305A (en) * | 2019-11-29 | 2020-10-23 | 中国航发沈阳黎明航空发动机有限责任公司 | Method for machining part with deep hole chromium layer |
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| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Open date: 20090617 |