CN111057895A - Integrated high-strength compression-resistant heat-preservation aluminum plate and preparation method thereof - Google Patents
Integrated high-strength compression-resistant heat-preservation aluminum plate and preparation method thereof Download PDFInfo
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- CN111057895A CN111057895A CN201911217854.4A CN201911217854A CN111057895A CN 111057895 A CN111057895 A CN 111057895A CN 201911217854 A CN201911217854 A CN 201911217854A CN 111057895 A CN111057895 A CN 111057895A
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- aluminum plate
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/08—Alloys with open or closed pores
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/08—Alloys with open or closed pores
- C22C1/083—Foaming process in molten metal other than by powder metallurgy
- C22C1/086—Gas foaming process
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
Abstract
The invention discloses an integrated high-strength compression-resistant heat-preservation aluminum plate and a preparation method thereof, and belongs to the field of aluminum plate preparation. An integrated high-strength compression-resistant heat-preservation aluminum plate and a preparation method thereof are disclosed, wherein under the experimental condition, a coating ratio of 1: 3 SiO2/TiH2The coated foaming agent is ideal, and determines more appropriate process parameters, namely: the melting temperature of the Al matrix is 650-700 ℃; melting time is 15 min; the adding amount of metal Mg is l.5wt% -3 wt%; the tackifying temperature is 700 ℃ and 750 ℃; stirring at a speed of 1 OOOr/min; tackifying for 0.5 min; the addition amount of the foaming agent is 1.5-3 wt%; the mixing temperature of the foaming agent is 700 ℃ and 750 ℃; stirring for 1.5-2.5 min; the temperature for heat preservation and foaming is 650-700 ℃; keeping the temperature for 2-3 min; adopts a double cooling mode of air cooling and water cooling.
Description
Technical Field
The invention relates to the field of aluminum plate preparation, in particular to an integrated high-strength compression-resistant heat-preservation aluminum plate and a preparation method thereof.
Background
The popular and easy to understand of the heat insulation plate is the plate for heat insulation of the building. The heat-insulating board is a hard foam plastic board which is made of polystyrene resin as a raw material and other auxiliary materials, has the moisture-proof and waterproof performances, and can reduce the thickness of an outer enclosure structure of a building, thereby increasing the indoor use area. The aluminum veneer is a building decoration material which is processed and formed by adopting fluorocarbon spraying technology after chromizing and other treatments. The heat-insulating aluminum plate is formed by combining the heat-insulating plate with the aluminum veneer through an adhesive, so that the heat-insulating plate with decorative performance is manufactured.
The existing integrated high-strength compression-resistant heat-preservation aluminum plate and the preparation method thereof have the defects of complex preparation process and incapability of achieving optimal process parameters.
Disclosure of Invention
The invention aims to solve the problems that the preparation process is complex and the technological parameters cannot reach the optimal values, and provides an integrated high-strength compression-resistant heat-preservation aluminum plate and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
an integrated high-strength compression-resistant heat-preservation aluminum plate and a preparation method thereof comprise the following steps:
s1, heating the box-type resistance furnace to 650-700 ℃, keeping the constant temperature for 10-15min, then melting the Al matrix in a crucible provided with the Al matrix in the box-type resistance furnace at the constant temperature, and finishing the melting process after 15-30 min;
s2, heating the crucible resistance furnace to 700-;
s3, adding a certain amount of tackifier into the crucible of S2, starting a stirring device to stir at a constant speed of 1OOOr/min, and finishing the tackifying process after 0.5 min;
s4, adding a certain amount of foaming agent after the tackifying process of S3 is finished, keeping the temperature of the crucible resistance furnace body at 700-;
s5, pouring the mixture of the solution and the foaming agent in the S4 into a mould, then placing the mould into a crucible resistance furnace, controlling the temperature of the crucible resistance furnace at 650-700 ℃, and carrying out heat preservation foaming;
s6, placing the die in a cooling tank, and synchronously cooling by adopting an air cooling mode and a water cooling mode to obtain the high-strength compression-resistant heat-preservation aluminum plate.
Preferably, the tackifier adopted in S3 is metal Mg, the content of the metal Mg is more than or equal to 95.5%, the granularity of the metal Mg is 50-100 meshes, and the adding amount of the metal Mg is 1.5-3 wt%.
Preferably, the foaming agent in S4 is prepared by using a coating ratio of 1: 3 SiO2/TiH2The particle size of the coated foaming agent is 50-60 um; at the same time use uncoated TiH2The powder has the granularity of 300 meshes and the particle size of 50um, and the addition amount of the foaming agent is 1.5-3 wt%.
Preferably, the box-type resistance furnace adopted in the S1 is SX-9-12 type, the specification is 400 x 250 x 160mm, and the temperature rise time of the empty furnace is less than or equal to 90 min.
Preferably, the used orange pan resistance furnace is SG27.5-12, the size of the hearth is phi 250 x 300mm, the heating element is an iron-chromium-niobium alloy wire which is wound into a spiral shape and then is coiled in the wire groove, the iron-chromium-niobium alloy wire is uniformly arranged in the hearth, the power is 7.5KW, and the temperature rise time of an empty furnace is less than or equal to 120 minutes.
Preferably, the crucible used in S1-S5 has good heat transfer performance and is beneficial to quick cooling, and the crucible is made of stainless steel which is high temperature resistant and has a wall thickness of 3 mm; the size of the crucible is set according to the practical utilization space in the hearth of the crucible resistance furnace, and the bottom of the crucible is set with a certain taper
Preferably, the length of the paddle on the stirring device in S3 is 70% of the inner diameter of the crucible used; and the stirring force is enhanced by adopting a plurality of layers of blades.
Compared with the prior art, the invention provides an integrated high-strength compression-resistant heat-preservation aluminum plate and a preparation method thereof, and the integrated high-strength compression-resistant heat-preservation aluminum plate has the following beneficial effects:
1. according to the invention, through experimental research, the coating ratio of 1: 3 SiO2/TiH2The coated foaming agent is ideal, and determines more appropriate process parameters, namely: the melting temperature of the Al matrix is 650-700 ℃; melting time is 15 min; the adding amount of metal Mg is l.5wt% -3 wt%; the tackifying temperature is 700 ℃ and 750 ℃; stirring at a speed of 1 OOOr/min; tackifying for 0.5 min; the addition amount of the foaming agent is 1.5-3 wt%; the mixing temperature of the foaming agent is 700 ℃ and 750 ℃; stirring for 1.5-2.5 min; the temperature for heat preservation and foaming is 650-700 ℃; keeping the temperature for 2-3 min; adopts a double cooling mode of air cooling and water cooling.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
Example 1:
an integrated high-strength compression-resistant heat-preservation aluminum plate and a preparation method thereof comprise the following steps:
s1, heating the box-type resistance furnace to 650-700 ℃, keeping the constant temperature for 10-15min, then melting the Al matrix in a crucible provided with the Al matrix in the box-type resistance furnace at the constant temperature, and finishing the melting process after 15-30 min;
s2, heating the crucible resistance furnace to 700-;
s3, adding a certain amount of tackifier into the crucible of S2, starting a stirring device to stir at a constant speed of 1OOOr/min, and finishing the tackifying process after 0.5 min;
s4, adding a certain amount of foaming agent after the tackifying process of S3 is finished, keeping the temperature of the crucible resistance furnace body at 700-;
s5, pouring the mixture of the solution and the foaming agent in the S4 into a mould, then placing the mould into a crucible resistance furnace, controlling the temperature of the crucible resistance furnace at 650-700 ℃, and carrying out heat preservation foaming;
s6, placing the die in a cooling tank, and synchronously cooling by adopting an air cooling mode and a water cooling mode to obtain the high-strength compression-resistant heat-preservation aluminum plate.
Further, preferably, the tackifier used in S3 is metal Mg, the content of the metal Mg is more than or equal to 95.5%, the granularity is 50-100 meshes, and the adding amount is 1.5-3 wt%.
Further, preferably, the foaming agent in S4 is coated with a coating ratio of 1: 3 SiO2/TiH2The particle size of the coated foaming agent is 50-60 um; at the same time use uncoated TiH2The powder has the granularity of 300 meshes and the particle size of 50um, and the addition amount of the foaming agent is 1.5-3 wt%.
Further, preferably, the box-type resistance furnace adopted in S1 is SX-9-12 type, the specification is 400 x 250 x 160mm, and the temperature rise time of the empty furnace is less than or equal to 90 min.
Further, preferably, the type of the used orange pan resistance furnace is SG27.5-12, hearth size phi 250 x 300mm, heating element ferrochromeThe niobium alloy wire is wound into a spiral shape and then wound in the wire groove and uniformly arranged in the hearth, the power is 7.5KW, and the temperature rise time of an empty furnace is less than or equal to 120 minutes.
Further, preferably, the crucible used in S1-S5 should have good heat conductivity and facilitate rapid cooling, and the crucible is made of stainless steel with high temperature resistance and 3mm wall thickness; the size of the crucible is set according to the practical utilization space in the hearth of the crucible resistance furnace, and the bottom of the crucible is set with a certain taper
Further, it is preferable that the length of the blade on the stirring apparatus in S3 is 70% of the inner diameter of the crucible used; and the stirring force is enhanced by adopting a plurality of layers of blades.
Example 2: based on example 1, but with the difference that:
TABLE 1 Curve relating Density, porosity to Mg addition
As the foamed aluminum is a two-phase material consisting of a metal framework and air holes, the density and the porosity of the foamed aluminum can fully reflect main physical characteristics, the measured density and the porosity of a foamed aluminum sample are used for reflecting the influence of different addition amounts of the metal Mg serving as the tackifier on the hole structure under the same experimental conditions, and the density of the foamed aluminum is correspondingly increased along with the reduction of the density of the foamed aluminum along with the increase of the addition amount of the Mg as can be seen from the table 1; when the addition amount of the metallic Mg is more than 3 wt%, the trend of the change is obviously reduced, which indicates that the tackifying effect of the tackifier is not obvious after the addition amount of the metallic Mg is more than 3 wt%. Therefore, in order to obtain a desired foamed aluminum cell structure sample, the amount of the tackifier to be added must be controlled within a certain range. Under the condition of certain other process parameters, the invention finally determines the addition of 1.5-3 wt% of metal Mg through repeated experiments.
Example 3: based on examples 1 and 2, but with the difference that:
TABLE 2 relationship curves of porosity, pore size and blowing agent addition
The optimal using amount of the foaming agent can not only prepare the foamed aluminum sample with high porosity and uniform pore structure, but also improve the effective utilization rate of the foaming agent and reduce the preparation cost of the foamed aluminum. Table 2 shows the relationship between different amounts of foaming agent and the porosity and pore size of the prepared foamed aluminum sample. As can be seen from the table, the porosity increases with the increase of the blowing agent, the pore diameter also increases, and when the blowing agent is added in an amount of more than 3%, the porosity and the pore diameter begin to decrease. The foaming agent is the driving force generated by bubbles in the foaming process, and when the adding amount of the foaming agent is less, the generated gas amount is less, the bubbles in the melt grow insufficiently, so that the porosity and the pore diameter of the prepared foamed aluminum sample are smaller; with the increase of the addition of the foaming agent, the amount of hydrogen generated in the melt is increased, so that bubbles grow sufficiently, and the porosity and the pore diameter of the sample are increased; under the experimental condition, when the adding amount exceeds 2.5 wt%, the increasing trend of the porosity and the pore diameter begins to slow, because under the condition of a certain stirring speed, the adding of excessive foaming agent reduces the mixing uniformity, meanwhile, the solubility of hydrogen in A1 melt is limited at a certain temperature, and a large amount of hydrogen generated by dispersion after saturation overflows from the melt to enter the atmosphere, so that the increasing trend of the porosity and the pore diameter is slow, and the effective utilization rate of the foaming agent is reduced. Therefore, in order to obtain an ideal foamed aluminum sample with uniform porosity and pore structure and fully consider the effective utilization rate of the foaming agent, the invention finally determines that the adding amount of the foaming agent is controlled between l.5 wt% and 3 wt%.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. An integrated high-strength compression-resistant heat-preservation aluminum plate and a preparation method thereof are characterized by comprising the following steps:
s1, heating the box-type resistance furnace to 650-700 ℃, keeping the constant temperature for 10-15min, then melting the Al matrix in a crucible provided with the Al matrix in the box-type resistance furnace at the constant temperature, and finishing the melting process after 15-30 min;
s2, heating the crucible resistance furnace to 700-;
s3, adding a certain amount of tackifier into the crucible of S2, starting a stirring device to stir at a constant speed of 1OOOr/min, and finishing the tackifying process after 0.5 min;
s4, adding a certain amount of foaming agent after the tackifying process of S3 is finished, keeping the temperature of the crucible resistance furnace body at 700-;
s5, pouring the mixture of the solution and the foaming agent in the S4 into a mould, then placing the mould into a crucible resistance furnace, controlling the temperature of the crucible resistance furnace at 650-700 ℃, and carrying out heat preservation foaming;
s6, placing the die in a cooling tank, and synchronously cooling by adopting an air cooling mode and a water cooling mode to obtain the high-strength compression-resistant heat-preservation aluminum plate.
2. The integrated high-strength compression-resistant heat-preservation aluminum plate and the preparation method thereof as claimed in claim 1, wherein the aluminum plate comprises: the tackifier adopted in S3 is metal Mg, the content of the metal Mg is more than or equal to 95.5%, the granularity of the metal Mg is 50-100 meshes, and the addition amount of the metal Mg is 1.5-3 wt%.
3. The integrated high-strength compression-resistant heat-preservation aluminum plate and the preparation method thereof as claimed in claim 2, wherein: the foaming agent in the S4 adopts a coating ratio of 1: 3 SiO2/TiH2The particle size of the coated foaming agent is 50-60 um; at the same time use uncoated TiH2The powder has the granularity of 300 meshes and the particle size of 50um, and the addition amount of the foaming agent is 1.5-3 wt%.
4. The integrated high-strength compression-resistant heat-preservation aluminum plate and the preparation method thereof as claimed in claim 2, wherein: the box-type resistance furnace adopted in the S1 is SX-9-12 type, the specification is 400 x 250 x 160mm, and the temperature rise time of the empty furnace is less than or equal to 90 min.
5. The integrated high-strength compression-resistant heat-preservation aluminum plate and the preparation method thereof as claimed in claim 2, wherein: the type of the used orange pan resistance furnace is SG27.5-12, the size of the hearth is phi 250 x 300mm, the heating element is an iron-chromium-niobium alloy wire which is wound into a spiral shape and then is coiled in the wire groove, the iron-chromium-niobium alloy wire is uniformly arranged in the hearth, the power is 7.5KW, and the temperature rise time of an empty furnace is less than or equal to 120 minutes.
6. The integrated high-strength compression-resistant heat-preservation aluminum plate and the preparation method thereof as claimed in claim 5, wherein the aluminum plate is characterized in that: the crucible used in the S1-S5 has good heat transfer performance and is beneficial to quick cooling, and the crucible is made of stainless steel which is high temperature resistant and has the wall thickness of 3 mm; the size of the crucible is set according to the actual utilization space in the hearth of the crucible resistance furnace, and the bottom of the crucible is set with a certain taper.
7. The integrated high-strength compression-resistant heat-preservation aluminum plate and the preparation method thereof as claimed in claim 5, wherein the aluminum plate is characterized in that: the length of the paddle on the stirring device in the S3 is 70 percent of the inner diameter of the crucible used; and the stirring force is enhanced by adopting a plurality of layers of blades.
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| CN201911217854.4A CN111057895A (en) | 2019-12-03 | 2019-12-03 | Integrated high-strength compression-resistant heat-preservation aluminum plate and preparation method thereof |
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| JPH01176043A (en) * | 1987-12-28 | 1989-07-12 | Aichi Steel Works Ltd | Manufacture of gas-permiable foaming aluminum |
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2019
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Application publication date: 20200424 |