CN101121198A - Voluminous defect free non-crystal alloy antigravity casting method and special purpose die - Google Patents
Voluminous defect free non-crystal alloy antigravity casting method and special purpose die Download PDFInfo
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- CN101121198A CN101121198A CNA2007101224071A CN200710122407A CN101121198A CN 101121198 A CN101121198 A CN 101121198A CN A2007101224071 A CNA2007101224071 A CN A2007101224071A CN 200710122407 A CN200710122407 A CN 200710122407A CN 101121198 A CN101121198 A CN 101121198A
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Abstract
The present invention relates to a large flawless amorphous alloy antigravity casting method and a special mold. The master alloy is heated until the temperature is higher than that with which the alloy melts and infused into a special mold used for fast cooling; the alloy flows from the bottom of the mold in the antigravity direction to fill the casting mold; the casting mold is a bottom pour and open one and the included angle between the central line of the casting mold and the vertical direction is greater than 0 and smaller than or equal to 90 degrees; the casting mold upper end is equipped with an air outlet groove which is communicated with the outside. With the present invention, the alloy flowing direction is the same as that of the air exhaust which is beneficial to producing large flawless plate or bar made of amorphous, nanocrystal and the compound materials or casts of complicated structure. The inside and surface of the produced sample do not have the flaw of air hole which increases the alloy density and surface finish.
Description
Technical field
The present invention relates to the non-crystaline amorphous metal technology of preparing, be specially a kind of voluminous defect free non-crystal alloy antigravity casting method and particular manufacturing craft.
Background technology
Block amorphous alloy is cooled off fast by foundry alloy fusing back and prepares, and the method that generally prepares block amorphous alloy has: water quenching, suction casting method, spray to cast method, high pressure casting and casting.All there is different limitation in methods such as water quenching, suction casting method, spray to cast method, high pressure casting because of mould or device-restrictive.Casting adopts the gravity direction casting, be melt flows direction and melt flows direction consistent and to discharge direction opposite for gas with gravity direction, be easy in rapid solidification, cause residual gas in the foundry goods and form pore, and form current mark at cast(ing) surface, experimental results show that the amorphous nano peritectic alloy for preparing with these class methods is in above-mentioned two obvious variation of regional interior mechanics performance.The bottom pour mold injection method that adopts in the conventional alloys can make alloy inject die cavity in the casting mold bottom, and alloy filling die cavity direction and gas are discharged the direction basically identical, help the alloy part of defectives such as preparing no bubble, be mingled with.
Summary of the invention
The object of the present invention is to provide a kind of method and particular manufacturing craft for preparing the voluminous defect free non-crystal alloy material, prepare different shape, the bulk amorphous alloy that particularly has the aspect ratio makes the alloy surface smooth interior pore-free defective of preparation simultaneously, has high-compactness.
Technical scheme of the present invention is: a kind of voluminous defect free non-crystal alloy antigravity casting method and particular manufacturing craft, with the alloy heat fused, molten alloy enters casting mold via cup and sprue, thereby and along the mobile filling cast of antigravity direction, mold cools down is characterized in that to room temperature: alloy is a non-crystaline amorphous metal; Its particular manufacturing craft adopts bottom pour mold formula open form, the casting mold center line with straight up between direction angle be more than or equal to zero degree smaller or equal to 90 degree, air drain and external communications begin to rehearse on the casting mold.
Its concrete steps are as follows:
1) foundry alloy is heated to fusing, insulation;
2) molten alloy is injected in the particular manufacturing craft;
3) alloy melt flows along the antigravity direction and is full of casting mold;
4) thus make mold cools down to room temperature prepare block amorphous alloy.
Mould adopts bottom pour mold formula open form, the casting mold center line and straight up between direction angle be smaller or equal to 90 degree more than or equal to zero degree, casting mold upper end begin to rehearse air drain and external communications, but mould gate cup and the low pipe fitting of sprue position socket thermal conductivity are as earthenware or graphite-pipe.The mould gate cup can be used as the split external piece with sprue and is connected use with mould.Adopt the mould of insulation pipe fitting or external running gate system, molten alloy injects behind the die cavity immediately inclined mould or removes external running gate system, thereby reduces the mold cools down burden, guarantees the cooling effect of alloy in the die cavity; Mold materials is the combination of the medium of one or more organic or inorganics, and as metal, sand, gypsum etc., the die assembly mode can be typing, the type of can bursting, a kind of in combined.
Principle of the present invention is: foundry alloy is by the heating furnace heat fused, and the fusion foundry alloy injects mould.Molten alloy passes through sprue filling mould fast, and overcomes gravity effect injection casting mold from mold bottom, because the casting mold afterbody is communicated with by steam vent with extraneous, the extruding that the interior gas of casting mold is subjected to molten alloy is discharged by steam vent.Because the flow direction of molten alloy is consistent with the direction that gas is discharged, there are not gas hole defect in bulk amorphous alloy or nanocrystalline non-equilibrium alloy inside that rapid solidification forms, the surface not have the gas current mark that stays because gas passes through, has guaranteed the interior solid degree and the surface smoothness of amorphous nano peritectic alloy.Simultaneously, alloy provides static pressure for rapidly solidified alloy in the casting mold in sprue and the cup, guarantees that interior alloy of casting mold and casting mold fit tightly, thereby has guaranteed solidification cooling and alloy surface fineness.For complex structure spare, the present invention adopts the double rising head of doing of the air discharge duct of large volume, and alloy is filled air discharge duct after being full of casting mold, because air discharge duct is positioned at the upper end of casting mold, its alloy has guaranteed that for alloy in the casting mold provides static pressure complex structure spare accurately fills type.
Advantage of the present invention is:
1) adopt molten alloy antigravity direction to fill the type method, make alloy flow direction and gas discharge direction consistent, thereby avoided at the nanocrystalline inner gas hole defect that produces of bulk amorphous alloy, avoided the generation of alloy surface gas current mark simultaneously, be beneficial to the non-equilibrium material of preparation high-density bulk amorphous nano-crystalline especially, improved the mechanical property of alloy.
2) adopt mould antigravity direction to fill the type method, the static pressure that alloy provides in cup and sprue and the big air discharge duct helps preparing the bulk amorphous nanometer crystal alloy with aspect ratio, guarantee that simultaneously interior alloy of casting mold and casting mold fit tightly, thereby guaranteed solidification cooling and alloy surface fineness, and helped the preparation of intricate casting.
3) utilize simple casting technique to prepare large volume high-compactness amorphous nano peritectic alloy, technology simply is beneficial to operation, has avoided inhaling casting and the comparatively complicated technology of high-pressure casting, is applicable to industrial mass manufacture.
Description of drawings
The metal die schematic diagram of Fig. 1 embodiment 3 external running gate systems;
The casting of Fig. 2 gravity direction is cast the non-crystaline amorphous metal bar x-ray inspection comparison diagram of preparation with the antigravity direction, wherein: the elongated four amorphous bars in picture top are that the inventive method is the preparation of antigravity direction casting, the four short and thick amorphous bars in picture below are that the gravity direction casting obtains, major part all has tangible gas hole defect in the alloy bar material that obtains in the gravity direction casting, adopts antigravity casting then can avoid gas hole defect.
The specific embodiment
Embodiment 1
The Zr-Al-Ni-Cu foundry alloy is configured to by atomic percent: Zr
55-Al
10-Ni
5-Cu
30, under vacuum state, to utilize the high-frequency induction furnace melting, and under inert gas shielding, cast, concrete steps are:
1. handle is Zr by the atom per distribution ratio
55Al
10Ni
5Cu
30The foundry alloy coarse crushing after the quartz crucible of packing into and being used for casting, the quartz crucible that fills foundry alloy is placed in the high-frequency induction furnace, the copper mold that is used for rapid solidification is positioned in the vacuum cavity, be positioned at the quartz crucible lower end;
2. adjust the position of quartz crucible stopper noz(zle) and copper mold cup in advance, guarantee that molten alloy flows in the copper mold fully in the casting cycle;
3. close the vacuum furnace body fire door, be evacuated to 5 * 10
-3Handkerchief, the applying argon gas protection;
4. startup high frequency induction power supply is heated to more than the fusion temperature 100～150 ℃ to foundry alloy, and insulation slightly;
5. rotation dwang, make that molten alloy is cast in the copper mold fully in the quartz crucible, alloy by cup, sprue to the copper mold bottom, melt overcomes gravity along the mobile casting mold that is full of of antigravity direction, fill the alloy of type simultaneously the gas in the casting mold is discharged casting mold via the casting mold upper end with the extraneous steam vent that is connected, according to the different-diameter of copper mold, can prepare the complete amorphous bar of Φ 3～10mm.
Embodiment 2
Difference from Example 1 is:
Alloy melting and pouring procedure are with embodiment 1, copper mold cup and sprue socket insulation graphite-pipe, molten alloy fills type to casting mold via the insulation graphite-pipe, has guaranteed that alloy can not solidify because copper mold cools off fast in cast gate and sprue, thereby has guaranteed to fill the type integrality.
Embodiment 3
Alloy melting and pouring procedure are with embodiment 1, and cup and sprue are that graphite system external piece is communicated with (as Fig. 2) with copper mold, and molten alloy flows via external running gate system antigravity direction and fills type rapid solidification to the copper mold casting mold and form complete bulk amorphous alloy.
Embodiment 4
Alloy melting and pouring procedure are with embodiment 1, and mould designs as embodiment 2 or 3, and the Zr-Al-Ni-Cu foundry alloy is prepared the amorphous/nanocrystalline composite that noncrystal substrate has the nanometer crystalline phase to separate out.
Claims (3)
1. voluminous defect free non-crystal alloy antigravity casting method and particular manufacturing craft, with the alloy heat fused, molten alloy enters casting mold via cup and sprue, thereby and along the antigravity direction filling cast that flows, mold cools down is characterized in that to room temperature: alloy is a non-crystaline amorphous metal.
2. voluminous defect free non-crystal alloy antigravity casting method and particular manufacturing craft, it is characterized in that: mould adopts bottom pour mold formula open form, the casting mold center line and straight up between direction angle be more than or equal to zero degree smaller or equal to 90 degree, casting mold upper end begin to rehearse air drain and external communications.
3. a kind of voluminous defect free non-crystal alloy antigravity casting method according to claim 2 and particular manufacturing craft, it is characterized in that: mold materials is the combination of the medium of one or more organic or inorganics, and the die assembly mode can be typing, the type of can bursting, a kind of in combined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101224071A CN101121198A (en) | 2007-09-25 | 2007-09-25 | Voluminous defect free non-crystal alloy antigravity casting method and special purpose die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101224071A CN101121198A (en) | 2007-09-25 | 2007-09-25 | Voluminous defect free non-crystal alloy antigravity casting method and special purpose die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101121198A true CN101121198A (en) | 2008-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101224071A Pending CN101121198A (en) | 2007-09-25 | 2007-09-25 | Voluminous defect free non-crystal alloy antigravity casting method and special purpose die |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102335708A (en) * | 2011-08-19 | 2012-02-01 | 江苏森威精锻有限公司 | Air outlet hole structure of die |
| CN104353781A (en) * | 2014-10-27 | 2015-02-18 | 无锡乐华自动化科技有限公司 | Lost foam casting process of low-alloy cast steel wheel for port machinery |
-
2007
- 2007-09-25 CN CNA2007101224071A patent/CN101121198A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102335708A (en) * | 2011-08-19 | 2012-02-01 | 江苏森威精锻有限公司 | Air outlet hole structure of die |
| CN104353781A (en) * | 2014-10-27 | 2015-02-18 | 无锡乐华自动化科技有限公司 | Lost foam casting process of low-alloy cast steel wheel for port machinery |
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Open date: 20080213 |