CN1038314C - Metal-base composite material electromagnetic stirring casting technology - Google Patents
Metal-base composite material electromagnetic stirring casting technology Download PDFInfo
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- CN1038314C CN1038314C CN 93111036 CN93111036A CN1038314C CN 1038314 C CN1038314 C CN 1038314C CN 93111036 CN93111036 CN 93111036 CN 93111036 A CN93111036 A CN 93111036A CN 1038314 C CN1038314 C CN 1038314C
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Abstract
The present invention relates to a casting technique of metal-base composite material, which is suitable for metal-base composite material with magnetic conductivity in a melting state, such as an Al base, a Cu base, a Mg base, a Ti base, a Fe base, a Ni base, etc. The casting technique comprises the steps: the material is smelted, the fusant is poured in a casting mold, etc. The present invention is characterized in that after the fusant is poured in the casting mold, a rotational magnetic field or a linear traveling wave magnetic field is added to the fusant for electromagnetic agitation immediately or when the fusant is at two-phase region temperature according to different alloys. The technological parameter of the electromagnetic agitation is; the magnetic field intensity is from 0.1 to 1 tesla. The present invention can enhance the combination performance of the cast metal-base composite material.
Description
The present invention relates to the foundry engieering of metal-base composites, a kind of method of making composite with the electromagnetism stirring method is provided especially.
In decades, powder metallurgical sintering process is existing extensive work in metal-base composites research, because technical difficulty, complex process, the more high reason of cost is limited to, and has occurred the melt casting process of a series of Composite Preparation such as permanent mold casting, accurate shell moulded casting, semi-solid rheological casting, compression casting, negative pressure casting or the like in succession.Wherein using more is melt swirl method and composite casting, common feature in the various castings is to produce the liquid whirlpool with mechanical agitation, the compound particle that joins in the melt rotates by melt, enter in the base material, in fact so-called composite casting is swirl method and the combining of pressure casting method, also be unable to do without mechanical agitation, as seen stirring melt is the key link in the casting Composite Preparation.In the mechanical agitation process, the inhomogeneous compound particle distribution that causes of normal appearance " dead angle " or mechanical force and the inhomogeneities of base material tissue, thereby cause composite material combination property not high.Electromagnetic agitating technology is widely used in continuous casting steel machine, US Basic Application Number research is more, Japanese industry is used more general, electromagnetic agitation is to improving ingot quality, refinement and the effect of homogenising microscopic structure are fairly obvious, economic effect is very big, prepares composite but electromagnetic agitating technology is used for casting, still beyond example.
The preparation method who the purpose of this invention is to provide a kind of metal-base composites overcomes distribute inhomogeneities with the base material tissue of compound particle, improves the combination property of casting metal based composite material with this.
The casting technique of metal-base composites provided by the present invention, be suitable for having the metal-base composites of permeance in molten state, it comprises material melting, the step that melt is poured into casting mold and add compound constituent element in casting mold, after it is characterized in that melt is poured casting mold into, do not coexist melt when being in the two-phase section temperature immediately or according to alloy, add rotation magnetic field or linear travelling-magnetic-field to melt and carry out electromagnetic agitation, magnetic field intensity is 0.1～1 tesla.
The present invention adopts electromagnetic force to replace mechanical force to stir melt; produce whirlpool; by regulating electromagnetic field intensity; change mixing power and melt rotary speed; by the melt rotation awl institute negative pressure that forms with compound constituent element introducing metal or alloy melt; realize compound; simultaneously compound constituent element is evenly distributed; improve and base material melt wellability; be not subjected to compound constituent element shape (particle or whisker or fiber) state (coated particle or preliminary treatment particle) restriction; because electromagnetic field evenly distributes in whole melt; can avoid " dead angle " or the appearance of weakness zone that exist in the mechanical agitation, electromagnetic field can apply after casting any time, also has the effect of semi-solid casting; thereby technology of the present invention has the whirlpool casting simultaneously concurrently; the advantage of rheocasting; obtain base material dense structure, crystallization of refinement, base material tissue and compound constituent element are evenly distributed; superiority such as compound interface is tight are a kind of innovative technology approach that shows unique characteristics.Below by embodiment in detail the present invention is described in detail.
Embodiment 1
Japanese import multiply composite SiC fiber is weaved into net put into casting mold, the Al alloy melting is poured into and is added travelling-magnetic-field in the casting mold simultaneously, and it is compound that Al alloy and SiC fleece solidify generation, and casting mold uses nonmagnetic substance, as graphite, pottery or austenitic stainless steel.The matrix densification of preparing is closed well with compound constituent element interface junction.
Embodiment 2
With Mg base alloy heat fused, granularity is that the silicon-carbide particle of 90 μ m cleans the back heating, drying, Mg alloy melt after the fusing waters in the nonmagnetic substance ceramic-mould of into putting in rotating magnetic field generator, magnetic field intensity 1000 Gausses, adding rotation magnetic field simultaneously makes melt produce rotation, mould dimension Φ 100 * 200mm, add silicon-carbide particle, metal bath and silicon-carbide particle take place to stir under the rotating excitation field effect particle are evenly distributed in melt, promptly make the particles reiforced metal-base composition that is evenly distributed after solidifying.
Embodiment 3
With a kind of Al-0.5%Cu alloy is matrix material, and alumina powder (powder size is 60～100 microns) prepares composite with this technology.The Al-0.5%Cu alloy is heated to 800 ℃ waters eight casting molds, casting mold places in the magnetic field generator, simultaneously powder is added casting mold, add that rotating excitation field stirs alloy melt and powder simultaneously, powder is mixed in melt, magnetic field intensity and mould dimension obtain the metal original washing powder and come enhanced type composite material with example 2 after the cooling.
Claims (3)
1. the casting technique of a metal-base composites, be suitable for having the metal-base composites of permeance in molten state, it comprises material melting, the step that melt is poured into casting mold and add compound constituent element in casting mold, after it is characterized in that melt is poured casting mold into, do not coexist melt when being in the two-phase section temperature immediately or according to alloy, add rotation magnetic field or linear travelling-magnetic-field to melt and carry out electromagnetic agitation, magnetic field intensity is 0.1～1 tesla.
2. by the described casting technique of claim 1, it is characterized in that the prefabricated component of compound constituent element for being woven into by continuous fiber according to part shape, it can be put in the casting mold before pouring into melt.
3. by claim 1 or 2 described casting techniques, it is characterized in that employed casting mold is a nonmagnetic substance in the casting process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93111036 CN1038314C (en) | 1993-04-10 | 1993-04-10 | Metal-base composite material electromagnetic stirring casting technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93111036 CN1038314C (en) | 1993-04-10 | 1993-04-10 | Metal-base composite material electromagnetic stirring casting technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1093628A CN1093628A (en) | 1994-10-19 |
| CN1038314C true CN1038314C (en) | 1998-05-13 |
Family
ID=4988843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93111036 Expired - Fee Related CN1038314C (en) | 1993-04-10 | 1993-04-10 | Metal-base composite material electromagnetic stirring casting technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1038314C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101503297B (en) * | 2009-02-06 | 2012-09-05 | 中国计量学院 | Tape casting preparation for gradient material in rotating magnetic field |
| CN101503299B (en) * | 2009-02-06 | 2012-12-26 | 中国计量学院 | Gel injection moulding preparation for gradient material in rotating magnetic field |
| CN101704075B (en) * | 2009-11-13 | 2011-12-21 | 江苏大学 | Method for synthesizing aluminum-based composite material by multielement magnetic field combined fusant reaction |
| CN102554173B (en) * | 2011-12-22 | 2014-06-04 | 天津钢铁集团有限公司 | Method for increasing final electromagnetic stirring intensity of continuous casting billets |
| CN104894494A (en) * | 2015-05-25 | 2015-09-09 | 昆明理工大学 | Preparation method of carbon fiber mesh reinforced copper-based wear-resisting material |
| CN105400974A (en) * | 2015-11-03 | 2016-03-16 | 江苏奇纳新材料科技有限公司 | Low-segregation fine crystalline preparation process of high-temperature mother alloy |
| CN110436926B (en) * | 2019-08-27 | 2021-04-06 | 西南交通大学 | High-conductivity pantograph carbon slide plate and preparation method thereof |
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1993
- 1993-04-10 CN CN 93111036 patent/CN1038314C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1093628A (en) | 1994-10-19 |
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