CN101293277B - Pressure difference injection moulding method and equipment for amorphous magnesium alloy - Google Patents
Pressure difference injection moulding method and equipment for amorphous magnesium alloy Download PDFInfo
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- CN101293277B CN101293277B CN2008101149183A CN200810114918A CN101293277B CN 101293277 B CN101293277 B CN 101293277B CN 2008101149183 A CN2008101149183 A CN 2008101149183A CN 200810114918 A CN200810114918 A CN 200810114918A CN 101293277 B CN101293277 B CN 101293277B
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Abstract
The invention provides an amorphous magnesium alloy differential pressure injection molding method and equipment thereof and pertains to the technical field of alloy preparation engineering and equipment. A mould (10) is cooled; a mother alloy is added in from the upper end of a compression chamber (7); an upper compression bar (3) goes down to the place over the compression chamber (7); a workingcavity (12) is vacuumized by a vacuum pump (16); the compression chamber (7) is heated by a heater coil (6) so as to cause the mother alloy to be melted; a quick-opening valve (19) is opened, the upper compression bar (3) and a lower compression bar (4) go down for carrying out the injection, and the liquid alloy is injected into a die cavity of a mould (10); the liquid ally is solidified and theamorphous magnesium alloy is obtained; the operation of injection is finished. The equipment includes the upper compression bar (3), the lower compression bar (4), the heater coil (6) and a working chamber (12), etc. The method and the equipment of the invention have high heating efficiency; the molten bath of magnesium alloy can be cooled quickly; the operation of differential pressure injectionis simple, the applicability is better, the working is stable and reliable, and the process is easy to be controlled, thus being very suitable for preparing bulk amorphous magnesium alloy.
Description
Technical field
The present invention relates to a kind of pressure difference injection moulding method and equipment thereof that is applicable to the large block amorphous magnesium alloy of preparation, can be applicable to prepare bulk amorphous alloys, belong to amorphous magnesium alloy preparation engineering and equipment technical field.
Background technology
Non-crystaline amorphous metal with disordered structure, physical chemistry that it is unique and mechanical property have obtained people's extensive concern.As finding many binary and ternary magnesium base amorphous alloy system [3～6], they have good corrosion resistance and high hydrogen storage performance.For a long time, amorphous magnesium alloy mainly prepares by the rapidly solidified alloy melt, the sample of acquisition at least the size on certain one dimension direction less than 100 μ m, as strip, filament or micro mist form etc.Owing to be subjected to self size restrictions, many excellent specific properties of its non-crystaline amorphous metal of magnesium goods of these small bores can not given full play to, normally by further fixed processing to make the needs that block non-crystalline alloy material satisfies people.Common process technology has hot extrusion, hot rolling system, impact fusion and high-pressure sinter etc.Yet the material of making thus is cost height, complex process not only, the more important thing is that its tensile strength is lower, can't compare with amorphous alloy ribbon.Over past ten years, the appearance with big supercooling liquid phase region non-crystaline amorphous metal makes bulk amorphous alloys preparation research and development enter the brand-new stage.The amorphous formation ability of big supercooling liquid phase region non-crystaline amorphous metal is very strong, and critical speed is very low, thereby utilizes traditional foundry engieering just can obtain large block amorphous sample.
In large block amorphous magnesium alloy preparation, the preparation method according to reported in literature mainly contains water quenching, copper mold casting method and Hpdc method at present.Its mesohigh casting casting is to utilize piston with high pressure melted alloy to be headed in the copper mold fast, makes it force cooling, thereby obtains amorphous.The present rarely seen northeastern Japan of this pressure casting method university has mentioned, and aspects such as its equipment structure, concrete technological parameter there is no explanation.Domesticly also just be in the starting stage about large block amorphous research, the overwhelming majority only limits to the experimental study stage, does not appear in the newspapers especially for the method that is similar to the extrusion process preparation.
Summary of the invention
In order to improve the amorphous formation ability of alloy, obtain larger sized non-crystalline material, the invention provides a kind of differential pressure injection manufacturing process that possesses eddy-current heating and water cooled copper mould cooling, provide a cover corresponding pressure difference injection moulding equipment simultaneously.This method can satisfy the requirement that magnesium alloy fast and safely heats up, and magnesium alloy can be heated to required temperature, efficiency of heating surface height at short notice; Can quick suction of alloy melt be cast onto in the water cooled copper mould by differential pressure and injection device simultaneously, and under pressure, impel it to force cooled and solidified, thereby obtain large block amorphous magnesium alloy.Melt heating and quick differential pressure injection process in the technology all are easy to control, are applicable to the preparation of large block amorphous magnesium alloy.
The present invention solves technical scheme and the measure that large block amorphous magnesium alloy pressure difference injection moulding technical problem adopted: need rapid venting to press gas between chamber and copper mold before the differential pressure injection; And under argon shield; it is indoor by radio-frequency induction coil foundry alloy to be melted in pressure; by differential pressure device the suction of foundry alloy melt is cast onto copper mold; simultaneously by move pressing indoor last lower plunger to make melt rapid solidification under pressure; provide good pressurization cooling effect for the injection of bulk amorphous material is shaped, and then obtain large block amorphous magnesium alloy.
Magnesium alloy differential pressure injection equipment among the present invention is made up of following several big systems: hydraulic pressure injection system, heating system, mould and mold cooling system, differential pressure device and vacuum generating system.Connection and matching relationship between each parts are as follows:
1) hydraulic pressure injection system: comprise hydraulic cylinder 1, following hydraulic cylinder 2, upperpush rod 3, down-pressed pole 4;
2) heating system: comprise induction power supply, heater coil 6;
3) press chamber 7: comprise charging aperture 8 (linking to each other), press the equal up and down open-ended in chamber with die entrance 9;
4) mould and mold cooling system: comprise mould 10 (containing die entrance 9), cooling device 11;
5) vacuum generating system: comprise working cavity (containing vacuum orifice 13, the import of protection gas, fire door), vavuum pump 16, protection gas cylinder;
6) differential pressure device: comprise negative-pressure cup 18, quck-opening valve (linking to each other), negative pressure valve (linking to each other) with vavuum pump 16 with mould 10.
The invention has the beneficial effects as follows: can be in several minutes with magnesium alloy mother metal safety, fast, homogeneous be heated to temperature required, efficiency of heating surface height; Can (in the hundreds of millisecond) be fast in the short time, safety inhales the environment that solidifies under casting and the high pressure at the utmost point with magnesium alloy fused mass, impel its quick cooling; The heating of equipment and the differential pressure injection is easy and simple to handle, adaptability good, working stability is reliable.
Description of drawings
Fig. 1 is the present device structural representation.
Fig. 2 is system's assembling schematic diagram of differential pressure injection equipment.
Fig. 3 is that the diameter that injection is made is the non-crystal bar photo of MgNiPr of 4mm.
Fig. 4 is that the diameter that described injection is made is the X-ray diffractogram of the MgNiPr alloy of 4mm.
The specific embodiment
The present invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is the present device structural representation.As shown in Figure 1, a kind of amorphous magnesium alloy pressure difference injection moulding equipment, this equipment comprise hydraulic cylinder (1), following hydraulic cylinder (2), upper plunger (3), lower plunger (4), induction power supply, heater coil (6), press chamber (7), pressure chamber charging aperture (8), die entrance (9), cooling device (11), mould (10), working cavity, vacuum orifice (13), the import of protection gas, fire door, vavuum pump (16), protection gas cylinder, negative-pressure cup (18), quck-opening valve, negative pressure valve; The described hydraulic cylinder (1) of going up links to each other with lower plunger (4) respectively at upper plunger (3) with following hydraulic cylinder (2), and the injection operational power is provided; Upper plunger (3) and lower plunger (4) are all in pressing chamber (7); Induction power supply links to each other with heater coil (6), and heater coil (6) is wrapped in presses chamber (7) on every side, gives and presses chamber (7) that heating is provided; Press chamber charging aperture (8) to link to each other with die entrance (9); Cooling device (11) cools off mould (10); Fire door is arranged on the working cavity; Working cavity links to each other with vavuum pump (16) by vacuum orifice (13); Working cavity links to each other with the protection gas cylinder by the import of protection gas; Negative-pressure cup (18) links to each other with vavuum pump (16) by negative pressure valve, and negative-pressure cup (18) links to each other with mould (10) by quck-opening valve.
Present device mainly comprises the induction coil that is used for the fusing of magnesium alloy mother metal and presses chamber, vacuum and protection gas system, transportable lower plunger, differential pressure device, the water-cooled mould gone up.Before the differential pressure injection, need the gas between rapid venting pressure chamber and copper mold; Under protective atmosphere, adopt induction coil by to pressing indoor magnesium alloy mother metal to carry out Fast Heating, also prepare in the hope of obtaining homogeneous melt for differential pressure injection subsequently; When press indoor magnesium alloy alloy melt reach temperature required after, by the pressure reduction that negative-pressure cup produced that links with water cooled copper mould will press indoor alloy melt fast suction cast onto in the water cooled copper mould; Meanwhile,, hydraulic jack injection spacing and press the indoor down-pressed pole interlock mode that goes up to carry out quick differential pressure injection operation to pressing indoor magnesium alloy material by travel switch, and impel alloy melt under certain pressure, to force cooling fast, thereby obtain bulk amorphous material.Interlock of last down-pressed pole and differential pressure injection mode effectively guarantee the effect of rapid solidification under the pressure cooling of melt and the pressure, provide good pressurization cooling effect for the injection of bulk amorphous material is shaped.Fig. 2 is the concrete installation diagram of differential pressure injection system.
Large block amorphous magnesium alloy pressure difference injection moulding method, this method may further comprise the steps:
1) cooling device (11) cools off differential pressure injection equipment mould (10) in the differential pressure injection equipment;
2) foundry alloy is added from the upper end of pressing chamber (7); By last hydraulic cylinder (1) upper plunger (3) is gone downwards to and press 2～5mm place, top, chamber (7);
3) close upper furnace door, vavuum pump (16) vacuumizes working cavity by vacuum orifice (13); Vacuum in working cavity reaches 10
～3Close vavuum pump (16) when MPa is above, the protection gas cylinder charges into 1 atmospheric protective gas by the import of protection gas in working cavity;
4) vavuum pump (16) is evacuated to low-pressure state by negative pressure valve with negative-pressure cup (18);
5) induction power supply is given heater coil (6) energising, and heater coil (6) makes the foundry alloy fusing to pressing to heat in the chamber (7);
6) quck-opening valve is opened, and mould (10) is connected with negative-pressure cup (18); Upper plunger (3), lower plunger (4) be descending to carry out injection, and liquid alloy is arrived in the die cavity of mould (10) by injection by pressing chamber charging aperture (8) and die entrance (9); Pressurize is solidified liquid alloy under pressure;
7) after the step 6) liquid alloy solidified, upper plunger (3) was up, and lower plunger (4) is up, and clout is ejected;
8) cooling is 10～15 minutes, takes out the sample in mould (10) and the mold cavity, and the injection operation is finished.
Example: die casting goes out the MgNiPr magnesium amorphous bar that diameter is 4mm
Preparation technology's method is as follows:
(1) capital equipment is assembled into a cover differential pressure injection equipment by above-mentioned assembling process;
(2) upperpush rod 3, down-pressed pole 4, pressure chamber 7, mould 10 are cleaned out;
(3) cool off by 11 pairs of moulds 10 of cooling device;
(4) an amount of MgNiPr foundry alloy after will cleaning up adds from the upper end of pressing chamber 7; By last hydraulic cylinder 1 upperpush rod 3 is gone downwards to and press 2～5mm place, 7 tops, chamber;
(5) close upper furnace door, by vacuum orifice 13,16 pairs of working cavities of vavuum pump vacuumize.Vacuum in working cavity reaches 10
～3 Close vavuum pump 16 when MPa is above, and in working cavity, charge into 1 protective gas about atmospheric pressure by the import of protection gas.
(6) by negative pressure valve, vavuum pump 16 is evacuated to low-pressure state with negative-pressure cup 18.
(7) induction power supply energising presses chamber 7 to heat by 6 pairs of heater coils, guarantees that foundry alloy fully melts.
(8) quck-opening valve is opened, and mould 10 is connected with negative-pressure cup 18, guarantees that mould 10 is in low-pressure state; Simultaneously upperpush rod 3, down-pressed pole 4 are descending carries out the injection operation, liquid alloy by press chamber charging aperture 8 and die entrance 9 by injection in the die cavity of mould 10, and pressurize a period of time solidify under pressure to guarantee it.
(9) upper plunger 3 is up thereafter, and lower plunger 4 is up, and clout is ejected.
(10) sample in mould 10 and the mold cavity is taken out in cooling after 10～15 minutes, and the injection operation is finished.
The MgNiPr sample that injection goes out such as Fig. 3 (Fig. 3 is that the diameter that injection is made is the non-crystal bar photo of MgNiPr of 4mm), its X-ray diffractogram is (Fig. 4 is that the diameter that described injection is made is the X-ray diffractogram of the MgNiPr alloy of 4mm) as shown in Figure 4, and as seen this MgNiPr sample is a non-crystalline material.
Claims (2)
1. an amorphous magnesium alloy pressure difference injection moulding method is characterized in that, this method may further comprise the steps:
1) cooling device (11) cools off differential pressure injection equipment mould (10) in the differential pressure injection equipment;
2) foundry alloy is added from the upper end of pressing chamber (7); By last hydraulic cylinder (1) upper plunger (3) is gone downwards to and press 2～5mm place, top, chamber (7);
3) close upper furnace door, vavuum pump (16) vacuumizes working cavity by vacuum orifice (13); Vacuum in working cavity reaches 10
-3Close vavuum pump (16) when MPa is above, the protection gas cylinder charges into 1 atmospheric protective gas by protection gas import (14) in working cavity;
4) vavuum pump (16) is evacuated to low-pressure state by negative pressure valve with negative-pressure cup (18);
5) induction power supply is given heater coil (6) energising, and heater coil (6) makes the foundry alloy fusing to pressing to heat in the chamber (7);
6) quck-opening valve is opened, and mould (10) is connected with negative-pressure cup (18); Upper plunger (3), lower plunger (4) be descending to carry out injection, and liquid alloy is arrived in the die cavity of mould (10) by injection by pressing chamber charging aperture (8) and die entrance (9); Pressurize is solidified liquid alloy under pressure;
7) after the step 6) liquid alloy solidified, upper plunger (3) was up, and lower plunger (4) is up, and clout is ejected;
8) cooling is 10～15 minutes, takes out the sample in mould (10) and the mold cavity, and the injection operation is finished.
2. amorphous magnesium alloy pressure difference injection moulding equipment, it is characterized in that this equipment comprises hydraulic cylinder (1), following hydraulic cylinder (2), upper plunger (3), lower plunger (4), induction power supply, heater coil (6), presses chamber (7), pressure chamber charging aperture (8), die entrance (9), cooling device (11), mould (10), working cavity, vacuum orifice (13), protection gas import (14), fire door, vavuum pump (16), protection gas cylinder, negative-pressure cup (18), quck-opening valve, negative pressure valve;
The described hydraulic cylinder (1) of going up links to each other with lower plunger (4) respectively at upper plunger (3) with following hydraulic cylinder (2), and the injection operational power is provided; Upper plunger (3) and lower plunger (4) are all in pressing chamber (7); Induction power supply links to each other with heater coil (6), and heater coil (6) is wrapped in presses chamber (7) on every side, gives and presses chamber (7) that heating is provided; Press chamber charging aperture (8) to link to each other with die entrance (9); Cooling device (11) cools off mould (10); Fire door is arranged on the working cavity; Working cavity links to each other with vavuum pump (16) by vacuum orifice (13); Working cavity links to each other with the protection gas cylinder by protection gas import (14); Negative-pressure cup (18) links to each other with vavuum pump (16) by negative pressure valve, and negative-pressure cup (18) links to each other with mould (10) by quck-opening valve.
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| CN2008101149183A CN101293277B (en) | 2008-06-13 | 2008-06-13 | Pressure difference injection moulding method and equipment for amorphous magnesium alloy |
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| CN2008101149183A CN101293277B (en) | 2008-06-13 | 2008-06-13 | Pressure difference injection moulding method and equipment for amorphous magnesium alloy |
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| CN102534437A (en) | 2011-12-15 | 2012-07-04 | 比亚迪股份有限公司 | Amorphous alloy and method for preparing same |
| CN102527982B (en) * | 2011-12-15 | 2015-05-13 | 比亚迪股份有限公司 | Amorphous alloy diecasting equipment and amorphous alloy diecasting process |
| CN203578719U (en) * | 2013-11-30 | 2014-05-07 | 中国科学院金属研究所 | Amorphous alloy element casting forming equipment |
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| CN104493145B (en) * | 2014-12-09 | 2017-08-01 | 潍坊一立精密铸造有限公司 | New induction furnace and new induction furnace casting mould |
| CN107398535A (en) * | 2016-05-20 | 2017-11-28 | 核工业西南物理研究院 | A kind of novel magnesium alloy spun furnace |
| CN107081417A (en) * | 2017-01-23 | 2017-08-22 | 中国科学院金属研究所 | A kind of preparation facilities and preparation method for improving al based amorphous alloy formation size |
| CN107020362A (en) * | 2017-05-04 | 2017-08-08 | 张斌 | Amorphous metal forming method |
| CN108788102A (en) * | 2017-06-07 | 2018-11-13 | 上海交通大学 | Increase preparation method and device that material method quickly solidifies congruent axialite aluminium alloy cast ingot |
| CN109530702B (en) * | 2018-11-16 | 2021-01-29 | 苏州市台群机械有限公司 | Amorphous alloy mobile phone middle frame forming device and forming method thereof |
| CN113290232B (en) * | 2021-05-25 | 2022-06-14 | 哈尔滨工业大学 | Reverse gravity filling forming method for large-size complex amorphous alloy component |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5324368A (en) * | 1991-05-31 | 1994-06-28 | Tsuyoshi Masumoto | Forming process of amorphous alloy material |
| US6427753B1 (en) * | 1997-06-10 | 2002-08-06 | Akihisa Inoue | Process and apparatus for producing metallic glass |
| CN1438083A (en) * | 2003-03-07 | 2003-08-27 | 江苏大学 | Method for making block metal glass using quick-cooling technology |
| CN1803342A (en) * | 2005-12-16 | 2006-07-19 | 华中科技大学 | Metal glass melt cast moulding method and its device |
-
2008
- 2008-06-13 CN CN2008101149183A patent/CN101293277B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5324368A (en) * | 1991-05-31 | 1994-06-28 | Tsuyoshi Masumoto | Forming process of amorphous alloy material |
| US6427753B1 (en) * | 1997-06-10 | 2002-08-06 | Akihisa Inoue | Process and apparatus for producing metallic glass |
| CN1438083A (en) * | 2003-03-07 | 2003-08-27 | 江苏大学 | Method for making block metal glass using quick-cooling technology |
| CN1803342A (en) * | 2005-12-16 | 2006-07-19 | 华中科技大学 | Metal glass melt cast moulding method and its device |
Non-Patent Citations (8)
| Title |
|---|
| 孙国元等.制备Mg基大块金属玻璃的特种铸造方法.特种铸造及有色合金 2004年第1期.2004,(2004年第1期),47-50. |
| 孙国元等.制备Mg基大块金属玻璃的特种铸造方法.特种铸造及有色合金 2004年第1期.2004,(2004年第1期),47-50. * |
| 孙蔚.非晶55Mg35Ni10Si块体的制备及力学性能.中国有色金属学报17 7.2007,17(7),1155-1159. |
| 孙蔚.非晶55Mg35Ni10Si块体的制备及力学性能.中国有色金属学报17 7.2007,17(7),1155-1159. * |
| 贾彬彬等.非晶态合金制备方法.轻合金加工技术34 10.2006,34(10),20-24. |
| 贾彬彬等.非晶态合金制备方法.轻合金加工技术34 10.2006,34(10),20-24. * |
| 黎业生等.镁基大块金属玻璃的研究进展及其制备.轻合金加工技术33 9.2005,33(9),1-5. |
| 黎业生等.镁基大块金属玻璃的研究进展及其制备.轻合金加工技术33 9.2005,33(9),1-5. * |
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