CN1116426C - Process for preparing closed pore foam aluminium by directly foaming molten body - Google Patents
Process for preparing closed pore foam aluminium by directly foaming molten body Download PDFInfo
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- CN1116426C CN1116426C CN 01106207 CN01106207A CN1116426C CN 1116426 C CN1116426 C CN 1116426C CN 01106207 CN01106207 CN 01106207 CN 01106207 A CN01106207 A CN 01106207A CN 1116426 C CN1116426 C CN 1116426C
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Abstract
The present invention relates to a preparation method for close-pore foamed aluminum by directly foaming a melted body, which comprises the following other process steps: melting raw materials, stirring after a foaming agent is added, foaming, cutting to mould, etc. In the preparation method of the present invention, calcium metal and magnesium metal can be added as tackifier to increase the viscosity of the melted body after the raw materials are melted; untreated TiH2 powder can be added as the foaming agent, and the high-speed stirring time is 5 to 20 minutes; treated TiH2 powder can also be added as the foaming agent, and the high-speed stirring time is 2 to 10 minutes at a foaming temperature of 540 to 650 DEG C; the melted body can be shifted out from a foaming furnace, cooled for temperature reduction, and cut to prepare the finished foamed aluminum after foaming. The present invention has the advantages of stable process conditions and exact operation control, can prepare the foamed aluminum with a uniform pore diameter and bright pore walls, and can also prepare the foamed aluminum with different density and different pore diameters.
Description
The invention belongs to the metal material processing field, particularly a kind of method of preparing closed pore foam aluminium by directly foaming molten body.
Foamed aluminium is a kind of novel multifunctional material, has the function of a lot of uniquenesses.Foamed aluminium can be divided into two classes: communicating aperture foamed aluminium and closed pore foam aluminium.It is low that closed pore foam aluminium has density, and sound-absorbing and sound-proofing properties are good, and functions such as shielding electromagnetic wave, bumper and absorbing shock are so all have extensive use at aspects such as metallurgy, machinery, communications and transportation, aerospace, chemical industry, telecommunications, buildings.The method of manufacturing foamed aluminium material at present mainly contains seepage flow casting, powder metallurgy method and direct foaming of melt mass method etc.The seepage flow casting is used to produce the communicating aperture foamed aluminium material.The powder metallurgy method only is suitable for some findings of casting processing because cost is higher, is not suitable for large-scale commercial production.The characteristics of direct foaming of melt mass method are that technology is simple, production cost is low, are suitable for fairly large industrial production, but there is the following weak point in existing production technique: (1) churning time is too short, is generally 1～2 minute.As the method that US.pat.3743353 addressed, churning time only is tens seconds to 60 seconds.Studies show that TiH
2When decomposing in 600 ℃～700 ℃ scopes, the initial stage decomposition reaction speed of (0～5 minute) is very fast, when foaming in this stage, be difficult to operate comparatively accurately, thereby the foamed aluminium pore homogeneity of making is relatively poor unstable product quality; (2), make existing production technology all be difficult to the control product density because churning time is too short; (3) can not produce the foamed aluminium product by preset aperture.
The object of the present invention is to provide a kind of can control foam aluminium product aperture and the method for the preparing closed pore foam aluminium by directly foaming molten body of density.
Characteristics of the present invention are: adopt without pretreated TiH (1)
2The time, churning time is extended to 5～20 minutes, control TiH by the control churning time
2Decomposition, even foaming is at suitable TiH
2Carry out under the rate of decomposition.Like this, both can make TiH
2Disperse more fully at aluminium liquid, the pore homogeneity of product is improved, can produce the foamed aluminium product in different densities and different apertures by comparatively accurate operation again.For example control TiH by the control churning time
2Decomposition, and then produce the foamed aluminium product of different densities; (2) to TiH
2Powder carries out pre-treatment, gets rid of active bigger hydrogen, reduces rate of decomposition.With such TiH
2Add in the molten aluminium, churning time is 2～10 minutes, so also can make foaming at suitable TiH
2Carry out under the rate of decomposition; (3) melt temperature that enters foamed process after the stirring is remained in 620 ℃～710 ℃ scopes,, improve the quality of product to reduce the crackle of hole wall; (4) control TiH
2The granularity of powder and add-on, and suitable churning time and the whipping temp of control are to produce the foamed aluminium product in different apertures.
Further narrate content of the present invention below in conjunction with drawings and Examples.
Accompanying drawing is a process flow sheet of the present invention.
The present invention is raw materials used to be fine aluminium, alusil alloy, wrought aluminium alloy, aluminium scrap; Tackify Agent is calcium metal, magnesium metal; Blowing agent is TiH2Powder.
The technological process of production of the present invention as shown in the figure, its processing step is as follows:
(1) with fine aluminium, or alusil alloy, or wrought aluminium alloy, or the aluminium scrap fusing, 800 Add 2～4% calcium metals, 1～2% magnesium metal more than ℃ under the temperature, and stir, make It fully melts, and reaches the purpose that increases melt viscosity.
(2) melt behind the tackify is moved into stirring crucible, and be cooled to 620 ℃～710 ℃, add 0.5～3% then without pretreated TiH2 powder, and carry out high-speed stirring, stirring velocity is 4000～6000 rev/mins, and churning time is 5～20 minutes.Whipping agent also can use pretreated TiH
2Powder is made whipping agent, and add-on is 0.5～3%, 620 ℃-710 ℃ of whipping temps, and stirring velocity 4000--6000 rev/min, churning time is 2～10 minutes.TiH
2The pretreatment process of powder is roasting 1 hour under 400～500 ℃ condition.TiH
2The granularity of powder is less than 0.074mm.
(3) groove of going into to foam just of the melt after will stirring, and send into the foaming furnace foaming.Blowing temperature is 540 ℃-650 ℃.
(4) after foaming finished, the groove that will foam shifted out foaming furnace, cooled, and took out foam, and cutting is become a useful person.
The present invention compares with external existing production technique, stable process conditions, operation precise control, reliable, and the foamed aluminium product aperture of making is even, the hole wall light, and can produce the foamed aluminium product in different densities, different apertures by customer requirements.
The index of the foamed aluminium product that the present invention produces is: the aperture is even, hole wall is bright, controllable density, controllable aperture: the span of control 0.2g/cm of density
3～0.8g/m
3The span of control 1.0mm in aperture～5.0mm.
Be three embodiment of the present invention below:
Embodiment 1: making density with aluminum silicon alloy is 0.3g/cm
3The foamed aluminium product.
With the aluminum silicon alloy fusing, melt temperature is raised to more than 800 ℃, add 2～4% calcium metals then, 1～2% MAGNESIUM METAL stirs and left standstill 10 minutes after 5 minutes again.Melt behind the tackify is moved into stirring crucible, be cooled to 620 ℃-680 ℃ also, carry out high-speed stirring then, 4000 rev/mins to 6000 rev/mins of stirring velocitys promptly add 0.5～3% pretreated TiH after the stirring beginning in melt
2Powder, churning time are 5-10 minute.After the stirring melt is gone into just the foaming groove of preheating, the groove that will foam pushes homothermic foaming furnace, and foamed time is 5 minutes.After foaming finished, the groove that will foam took out cooling, took out foam, and promptly getting density after cutting process is 0.3g/cm
3The foamed aluminium product.
Embodiment 2: making density with aluminum silicon alloy is 0.6g/cm
3The foamed aluminium product.
Aluminum silicon alloy is melted, and melt temperature is controlled at more than 800 ℃, add 2～4% calcium metals then, 1～2% MAGNESIUM METAL stirs and left standstill 10 minutes after 5 minutes again.Melt behind the tackify is moved into stirring crucible, be cooled to 650 ℃～700 ℃, carry out high-speed stirring then, 4000 rev/mins to 6000 rev/mins of stirring velocitys promptly add 0.5～3% pretreated TiH after the stirring beginning in melt
2Powder, churning time are 10～15 minutes.After the stirring melt is gone into just the foaming groove of preheating, the groove that will foam pushes the homothermic foaming furnace, and foamed time is 4 minutes.After foaming finished, the groove that will foam was released cooling, took out foam, and promptly getting density after cutting process is 0.6g/cm
3The foamed aluminium product.
Embodiment 3: making density with fine aluminium is 0.3g/cm
3The foamed aluminium product.
Fine aluminium is melted, and melt temperature is controlled at more than 800 ℃, add 2～4% calcium metals then, 1～2% MAGNESIUM METAL stirs and left standstill 10 minutes after 5 minutes again.Melt behind the tackify is moved into stirring crucible, be cooled to 680 ℃～710 ℃, carry out high-speed stirring then, 4000 rev/mins to 6000 rev/mins of stirring velocitys promptly add 0.5～3% pretreated TiH after the stirring beginning in melt
2Powder, churning time are 2～6 minutes.After the stirring melt is gone into just the foaming groove of preheating, the groove that will foam pushes homothermic foaming furnace, and foamed time is 5 minutes.After foaming finished, the groove that will foam was released cooling, took out foam, and promptly getting density after cutting process is 0.3g/cm
3The foamed aluminium product of fine aluminium.
Claims (4)
1, a kind ofly comprise raw material fusing, add the whipping agent stirring, foaming, excision forming be in the method for interior preparing closed pore foam aluminium by directly foaming molten body, it is characterized in that after the raw material fusing, do tackifier increase melt viscosity in temperature adding 2.0-4.0% (weight percent) calcium metal, 1.0-2.0% (weight percent) MAGNESIUM METAL more than 800 ℃; Melt behind the tackify is cooled to 620 ℃～710 ℃, adds 0.5-3.0%TiH
2Powder, the TiH of adding
2The granularity of powder is less than 0.074mm, and carries out high-speed stirring, and churning time is 5---20 minute; With the melt impouring foaming groove after stirring, and send into the foaming furnace foaming, blowing temperature is 540 ℃～650 ℃; After foaming finished, the groove that will foam shifted out foaming furnace, cooled, and took out foam, and cutting is become a useful person.
2, the method for preparing closed pore foam aluminium by directly foaming molten body according to claim 1 is characterized in that can using through pretreated TiH
2Powder is made whipping agent, and whipping temp is 620 ℃～710 ℃, and stirring velocity is 4000-6000 rev/min, and churning time is 2～10 minutes.
3, the method for preparing closed pore foam aluminium by directly foaming molten body according to claim 2 is characterized in that TiH
2The pretreatment process of powder is to fuse 1 hour under 400 ℃ of-500 ℃ of conditions.
4, the method for preparing closed pore foam aluminium by directly foaming molten body according to claim 1 is characterized in that by control TiH
2The granularity of powder and add-on and churning time are come the aperture of control foam aluminium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01106207 CN1116426C (en) | 2001-02-27 | 2001-02-27 | Process for preparing closed pore foam aluminium by directly foaming molten body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01106207 CN1116426C (en) | 2001-02-27 | 2001-02-27 | Process for preparing closed pore foam aluminium by directly foaming molten body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1320710A CN1320710A (en) | 2001-11-07 |
| CN1116426C true CN1116426C (en) | 2003-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01106207 Expired - Lifetime CN1116426C (en) | 2001-02-27 | 2001-02-27 | Process for preparing closed pore foam aluminium by directly foaming molten body |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100439525C (en) * | 2005-11-16 | 2008-12-03 | 中国科学院金属研究所 | Process for preparing foam magnesium by direct foaming of melt mass |
| CN100422363C (en) * | 2006-10-26 | 2008-10-01 | 中南大学 | Foaming device for preparing foam aluminum or foam aluminum alloy by melt foaming method |
| CN102373344B (en) * | 2010-08-13 | 2013-02-27 | 东北大学 | Preparation method and device of metal foam material |
| CN103182994A (en) * | 2013-01-17 | 2013-07-03 | 上海萃智科技发展有限公司 | Production method of heat-insulating and heat-preserving structure of passenger car |
| CN103266244B (en) * | 2013-04-28 | 2015-12-09 | 东南大学 | A kind of aluminium-magnesium-calcium alloy foam and preparation method thereof |
| CN105624451B (en) * | 2015-12-28 | 2017-10-27 | 北京有色金属研究总院 | A kind of high-strength and high ductility closed-cell aluminum foam and preparation method thereof |
| CN106636716B (en) * | 2016-11-28 | 2018-10-23 | 国网河南省电力公司商丘供电公司 | A kind of foamed aluminium production technology |
| CN107262718A (en) * | 2017-07-07 | 2017-10-20 | 哈尔滨工程大学 | A kind of method that utilization laser cladding forming technique prepares foamed aluminium |
| CN109022875A (en) * | 2018-09-11 | 2018-12-18 | 东北大学 | A kind of preparation method of high temperature resistant foamed aluminium material |
| CN108842080A (en) * | 2018-09-11 | 2018-11-20 | 东北大学 | A kind of preparation method of uniform foam cell foamed aluminium material |
| CN111974973A (en) * | 2020-07-02 | 2020-11-24 | 中信戴卡股份有限公司 | Manufacturing method of aluminum alloy casting and automobile anti-collision beam applying aluminum alloy casting |
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2001
- 2001-02-27 CN CN 01106207 patent/CN1116426C/en not_active Expired - Lifetime
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| CN1320710A (en) | 2001-11-07 |
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Assignee: Jiangsu Xinhuang Aluminum Development Co., Ltd. Assignor: Northeastern University Contract record no.: 2011320000532 Denomination of invention: Process for preparing closed pore foam aluminium by directly foaming molten body Granted publication date: 20030730 License type: Common License Open date: 20011107 Record date: 20110406 |
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Effective date of registration: 20200117 Address after: 110819 Heping Road, Heping District, Liaoning, Shenyang, Lane No. 11, No. 3 Patentee after: Advanced preparing technology project research center of material of Shenyang Dong Da Address before: 110004, Lane 3, Lane 11, Wenhua Road, Heping District, Liaoning, Shenyang Patentee before: Northeast University |
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