CN110527879B - Aluminum alloy material, preparation method, fixing piece, machining method and floor heating structure - Google Patents
Aluminum alloy material, preparation method, fixing piece, machining method and floor heating structure Download PDFInfo
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- CN110527879B CN110527879B CN201910925731.XA CN201910925731A CN110527879B CN 110527879 B CN110527879 B CN 110527879B CN 201910925731 A CN201910925731 A CN 201910925731A CN 110527879 B CN110527879 B CN 110527879B
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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
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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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
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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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
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/02—Flooring or floor layers composed of a number of similar elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/02—Flooring or floor layers composed of a number of similar elements
- E04F15/02038—Flooring or floor layers composed of a number of similar elements characterised by tongue and groove connections between neighbouring flooring elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/02—Flooring or floor layers composed of a number of similar elements
- E04F15/024—Sectional false floors, e.g. computer floors
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/02—Flooring or floor layers composed of a number of similar elements
- E04F15/024—Sectional false floors, e.g. computer floors
- E04F15/02447—Supporting structures
- E04F15/02452—Details of junctions between the supporting structures and the panels or a panel-supporting framework
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/02—Flooring or floor layers composed of a number of similar elements
- E04F15/10—Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/18—Separately-laid insulating layers; Other additional insulating measures; Floating floors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/12—Tube and panel arrangements for ceiling, wall, or underfloor heating
- F24D3/14—Tube and panel arrangements for ceiling, wall, or underfloor heating incorporated in a ceiling, wall or floor
- F24D3/141—Tube mountings specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F2290/00—Specially adapted covering, lining or flooring elements not otherwise provided for
- E04F2290/02—Specially adapted covering, lining or flooring elements not otherwise provided for for accommodating service installations or utility lines, e.g. heating conduits, electrical lines, lighting devices or service outlets
- E04F2290/023—Specially adapted covering, lining or flooring elements not otherwise provided for for accommodating service installations or utility lines, e.g. heating conduits, electrical lines, lighting devices or service outlets for heating
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F2290/00—Specially adapted covering, lining or flooring elements not otherwise provided for
- E04F2290/04—Specially adapted covering, lining or flooring elements not otherwise provided for for insulation or surface protection, e.g. against noise, impact or fire
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
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- Mechanical Engineering (AREA)
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- Physics & Mathematics (AREA)
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- General Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Floor Finish (AREA)
Abstract
The invention relates to the field of heat conduction materials, and discloses an aluminum alloy material, a preparation method, a fixing piece, a processing method and a floor heating structure. The fixing piece for the heating pipe is prepared from the Al-Mg-Si-Zr-RE-Fe alloy alloyed by trace elements, has good heat conduction performance, strength and heat resistance, and meets the requirements of ground heating materials on heat transfer, heat resistance and strength. Meanwhile, the invention designs the floor heating structure, wherein the embedded floors, the embedded floors and the keels, and the heating pipe and the fixing pieces are connected in a clamping manner, the connection manner is simple, the disassembly and the assembly are convenient and quick, the installation of the keels does not need screws, the noise of the floors can be effectively reduced, and when the quality problem of the heating floors occurs, only the local area with the problem needs to be disassembled, so that the maintenance is convenient.
Description
Technical Field
The invention relates to the field of heat conduction materials, in particular to an aluminum alloy material, a preparation method, a fixing piece, a processing method and a floor heating structure.
Background
Floor heating (floor heating for short) is the most popular and advocated heating mode in the world at present, saves energy, materials and space, is more comfortable, and has been widely accepted in europe, north america and east asia. With the continuous improvement of the living standard of people in China, more and more people know and accept the ground heating mode. The floor heating is realized by heating the surface of the floor to 18-32 ℃ (higher than the temperature of a respiratory system of a person) through circulating hot water or a heating cable embedded in a closed pipeline under the floor, uniformly supplying heat to the indoor in a radiation and convection heat transfer mode, and because the indoor temperature is gradually reduced from bottom to top, the comfortable feeling of foot warming and head cooling is provided for people. If the floor heating has good effects of upward heat transfer and downward heat insulation, the heating effect is guaranteed, and meanwhile, the heating temperature of circulating hot water or a heating cable can be reduced, so that the energy consumption is saved. The mounting means that tradition ground warmed up adopts the concrete to bury hot-water heating pipe, has following problem: firstly, the heat conduction performance of concrete and heat conduction materials is poor, so that the indoor temperature rise is slow and the heating effect is influenced; secondly, the heat loss is large, a large amount of heat is transmitted to the downstairs and the surrounding walls, the energy consumption is increased, thirdly, the height of the house space is reduced, the load of the floor is increased, the safety of the building is affected, the service life of the floor heating is prolonged, and once leakage occurs, the leakage is difficult to find and maintain, thereby bringing great trouble to users.
The aluminum alloy material has good heat conduction performance and is a potential floor heating structure material, but the traditional aluminum alloy floor heating material and the structure have the following problems: firstly, the mismatch between the strength and the thermal conductivity exists, and the heat resistance is poor; secondly, the cast structure has more pores and is loose, so that the mechanical property and the heat-conducting property are influenced; thirdly, the floor heating structure is single, the heating directivity and the heat preservation performance are poor, and the heat loss is serious.
Aiming at the problems, the novel aluminum alloy material, the fixing piece and the floor heating structure for the floor heating are invented, the heat conducting performance, the strength and the heat resistance are good, the heat transfer direction is centralized, and the safety, the low consumption and the long service life of the floor heating can be guaranteed.
Disclosure of Invention
One of the purposes of the invention is to provide an aluminum alloy material which has excellent heat conductivity, heat resistance and higher strength, can be used for preparing a fixing piece in a floor heating structure, and is energy-saving and durable.
In order to achieve the purpose, the invention adopts the following technical scheme:
the aluminum alloy material comprises the following components:
Mg:0.55～0.70wt％；
Si:0.30～0.50wt％；
Zr:0.05～0.18wt％；
RE:0.04～0.20wt％；
Fe:0.05～0.15wt％；
Mn:0.10～0.25wt％；
Ti:0.01～0.07wt％；
Cr:0.03～0.10wt％；
Zn:0.05～0.10wt％；
the total content of other inevitable impurities is less than or equal to 0.01 wt%, and the balance is Al.
In the present invention, the content of the alloying element Mg is 0.55 to 0.70 wt%, for example, 0.55 wt%, 0.60 wt%, 0.65 wt%, 0.70 wt%, etc., and the content of the alloying element Si is 0.30 to 0.50 wt%, for example, 0.30 wt%, 0.35 wt%, 0.40 wt%, 0.45 wt%, 0.50 wt%, etc., wherein the mass ratio of the two elements Mg and Si is 1.73 or less. Adding Mg and Si elements into industrial pure aluminum, and precipitating beta (Mg) by heat treatment2Si) dispersion strengthening phase, and can effectively improve the alloy strength. When the content ratio of Mg/Si is slightly less than 1.73, slightly excessive Si can be combined and precipitated with Fe in the matrix, and the solid solution degree of Si and Fe in the matrix is reduced, so that the lattice distortion of the matrix is reduced, the electrical conductivity of the alloy is improved, and the electrical conductivity is positively correlated with the thermal conductivity to a certain degree, so that the thermal conductivity of the alloy is also improved. When the content ratio of Mg/Si is too small, excessive Si can be dissolved in the matrix to reduce the thermal conductivity of the alloy, and when the content ratio of Mg/Si exceedsWhen the amount is more than 1.73, the solid solubility of the matrix is increased by excessive Mg element, so that the thermal conductivity of the material is reduced.
In the present invention, the content of Zr as an alloying element is 0.05 to 0.18 wt%, for example, 0.05 wt%, 0.06 wt%, 0.07 wt%, 0.08 wt%, 0.09 wt%, 0.10 wt%, 0.11 wt%, 0.12 wt%, 0.13 wt%, 0.14 wt%, 0.15 wt%, 0.16 wt%, 0.17 wt%, 0.18 wt%, etc. Al can be formed in the matrix by adding trace Zr element3Zr particles, Al having high thermal stability3The Zr particles generate effective pinning effect on dislocation and crystal boundary, can inhibit dynamic recrystallization of the Al-Mg-Si alloy in the extrusion process, and strengthen the extrusion strengthening effect of the aluminum alloy, so that the strength and the heat resistance of the Al-Mg-Si alloy can be improved. Zr element can interact with Mg element to promote the nucleation of beta phase in Al-Mg-Si alloy matrix, so that the beta phase is greatly separated out in the matrix, the solid solubility of Mg and Si atoms in the matrix is reduced, the phase change of the separated out phase is finer under the synergistic action of the Zr element and the Si element, and the comprehensive mechanical property, the heat-conducting property and the heat resistance of the alloy material are improved.
In the present invention, the content of the rare earth element RE is 0.04 to 0.20 wt%, for example, 0.04 wt%, 0.05 wt%, 0.06 wt%, 0.07 wt%, 0.08 wt%, 0.09 wt%, 0.10 wt%, 0.11 wt%, 0.12 wt%, 0.13 wt%, 0.14 wt%, 0.15 wt%, 0.16 wt%, 0.17 wt%, 0.18 wt%, 0.19 wt%, 0.20 wt%, etc.; RE may further preferably be 0.06 to 0.18 wt%. During the casting process, the rare earth elements can react with hydrogen in the melt to form stable Rare Earth Hydrides (REHs)2、REH3) Thereby effectively purifying the aluminum melt and reducing the pinhole rate and the porosity of the cast ingot. Meanwhile, the rare earth elements can also effectively remove impurities in the aluminum melt, improve the purity of the aluminum melt and obviously improve the heat-conducting property of the alloy. RE is preferably 65 wt% of Ce +35 wt% of La, compared with other rare earth elements, La and Ce are more economical, and the production cost of the material is lower. The La and Ce rare earth elements added in a mixed way can be enriched on a solid-liquid interface, so that heterogeneous nucleation cores of the melt are increased, and the growth of crystal grains is inhibited, thereby refining ingot casting crystal grains and being beneficial to improving the comprehensive mechanical property and the thermal processing property of the material. Al can be formed by the composite addition of Zr, La and Ce3The Zr and the RE compound synergistically promote desolventizing and inhibit coarsening of a second phase, and the overall strength and toughness of the alloy material are improved. However, when the rare earth content is excessive, the grain refining effect is too strong to cause excessive increase in the grain boundary density, strengthening the effect of inhibiting the movement of free electrons, and in addition, excessive rare earth elements also increase the solid solubility of the matrix, which in turn reduces the thermal conductivity of the alloy.
In the present invention, the content of the alloying element Fe is 0.05 to 0.15 wt%, for example, 0.05 wt%, 0.06 wt%, 0.07 wt%, 0.08 wt%, 0.09 wt%, 0.10 wt%, 0.11 wt%, 0.12 wt%, 0.13 wt%, 0.14 wt%, 0.15 wt%, etc.; the content of Fe may be further preferably 0.08 to 0.15 wt%; the addition of trace amount of Fe can inhibit Mg2The growth of the Si phase is more beneficial to maintaining the strengthening effect of the material, and when the Fe element is added excessively, a coarse second phase can be formed while the solid solubility of the matrix is increased, so that the mechanical property of the material is influenced. The La and Ce rare earth elements and the trace Fe element which are added in a mixed mode can react with the Si atoms dissolved in the matrix together to generate a FeRESiAl intermetallic compound, and the solid solubility of the matrix is effectively reduced through a synergistic effect, so that the scattering of free electrons is reduced, and the heat conductivity of the alloy is improved. Therefore, the RE and the trace Fe can synergistically improve the heat-conducting property, the heat-resistant property and the mechanical property of the aluminum alloy material.
Another object of the present invention is to provide a method for preparing the aluminum alloy material, which comprises the following steps:
(1) selecting 99.7% of industrial pure aluminum ingots as raw materials, controlling the smelting temperature to be 700-750 ℃, and adding Al-Si, Al-Fe, Al-RE, Al-Zr intermediate alloy and pure Mg blocks;
(2) standing for 1-2 h at the temperature of 720-740 ℃;
(3) and (5) casting.
In the invention, Al-Si intermediate alloy is Al-20% Si, Al-Fe intermediate alloy is Al-10% Fe, RE intermediate alloy is Al-20% RE, and Al-Zr intermediate alloy is Al-10% Zr.
Another object of the present invention is to provide a fixing member made of the above aluminum alloy material.
The invention also aims to provide a processing method of the fixing piece, which comprises the steps of smelting, casting, homogenizing treatment, hot extrusion, and sequentially carrying out quenching, stretching and straightening and aging treatment on a section obtained by the hot extrusion; the quenching comprises spray cooling quenching and air cooling quenching, the aluminum alloy extruded section is cooled to 150-250 ℃ through the spray cooling quenching, the aluminum alloy section is cooled to 30-50 ℃ from 150-250 ℃ through the air cooling quenching, and the desolventization of supersaturated solid solution and the deformation of the section are inhibited.
Furthermore, the heating temperature of the aging treatment is 150-200 ℃, the heat preservation time is 12-72 hours, and the main effect is to obtain a dispersed precipitated phase in a matrix, so that the mechanical property of the aluminum alloy is improved, and the heat conduction property of the aluminum alloy is improved.
The invention further aims to provide a floor heating structure convenient to mount, which comprises a heat supply assembly, wherein the heat supply assembly comprises a plurality of heat supply pipes and a plurality of fixing pieces, and at least one heat supply pipe is clamped between two adjacent fixing pieces.
As a preferred technical scheme of the floor heating structure, the floor heating structure further comprises a plurality of groups of embedded floors and keels, wherein at least one keel is arranged below each group of embedded floors and used for supporting the embedded floors; every group the both ends on embedded floor respectively with rather than adjacent embedded floor joint, every fossil fragments all joint in being located directly over it in the embedded floor.
As an optimal technical scheme of the floor heating structure, each group is arranged one end of the embedded floor is provided with a first clamping groove with a downward opening and is formed with a first boss, the other end of the embedded floor is provided with a second clamping groove with an upward opening and capable of being inserted into the first boss, and the embedded floor is formed with a second clamping groove capable of being simultaneously inserted into the keel in the first clamping groove.
As an optimal technical scheme of the floor heating structure, each group of the embedded floor comprises a first floor and a second floor which is formed with the first floor and is provided with a first clamping groove, the first floor is mutually abutted with the second floor, a second boss is arranged on the first floor and is provided with a second clamping groove, and the second floor is provided with the first boss.
As a preferable technical scheme of the floor heating structure, a leveling layer is arranged between the keel and the heat supply assembly; a reflecting layer, a first heat insulation layer and a first moisture-proof layer which are sequentially distributed from top to bottom are arranged below the heat supply assembly; the upper surface of the embedded floor is provided with a surface decoration layer.
The invention has the beneficial effects that:
(1) due to the addition of a proper amount of RE and Fe elements, the alloy has good strength, heat resistance and heat conductivity simultaneously under the synergistic effect of the RE and the Fe elements, and meanwhile, the addition of the Zr element improves the extrusion strengthening effect of the aluminum alloy, and simultaneously refines crystal grains and a second phase through the composite action of the Zr element and the rare earth element, so that the mechanical property, the heat resistance and the heat conductivity of the alloy are improved, and the service requirement of the floor heating fixing piece is met.
(2) In the floor heating structure, the embedded floors and the keels, and the heating pipes and the fixing pieces are connected in a clamping manner, so that the connection manner is simple, the mounting and the dismounting are convenient and quick, screws are not needed for mounting the keels, the noise of the floors can be effectively reduced, when the quality of the heating floors is poor, only the local area with the problem needs to be dismounted, and the maintenance is convenient.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings according to the contents of the embodiments of the present invention and the drawings without any creative effort.
Fig. 1 is a schematic diagram of a floor heating structure provided by an embodiment of the invention;
FIG. 2 is a schematic view of a structure of a built-in floor provided by an embodiment of the present invention;
fig. 3 is a partially enlarged schematic view at I in fig. 1.
In the figure:
1-embedded floor; 101-a first floor; 102-a second floor; 11-a first snap groove; 12-a first boss; 13-a second snap groove; 14-a second boss; 2-keel; 3-a heat supply assembly; 31-a heating pipe; 32-a fastener; 321-a third clamping groove; 322-a third boss; 4-leveling layer; 51-a first moisture barrier; 52-a second moisture barrier; 61-a first thermal insulation layer; 62-a second thermal insulation layer; 7-a reflective layer; 8-surface decorative layer.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by referring to the accompanying drawings and specific embodiments.
Examples 1 to 8 and comparative examples 1 to 7 shown in Table 1 were set, and the total content of other inevitable impurities was less than 0.01 wt%, with the balance being Al. The preparation method of the aluminum alloy material shown in the reference table 1 comprises the following steps: smelting an aluminum ingot with the purity of 99.7 percent at 700 ℃, and adding Al-Si, Al-Fe, Al-RE, Al-Zr intermediate alloy and a pure Mg block, wherein RE is 65wt percent Ce +35wt percent La; and (3) keeping the temperature of 720 ℃ and standing for 1h, casting to obtain an aluminum alloy cast ingot, and performing homogenization treatment, hot extrusion, quenching, straightening and aging treatment on the aluminum alloy cast ingot to obtain the fixing piece 32.
The hot extrusion temperature is 450 ℃, and the extrusion speed is 5 mm/min.
The quenching adopts spray cooling quenching and air cooling quenching treatment, the spray cooling quenching cools the aluminum alloy section to 250 ℃, the air cooling quenching treatment cools the aluminum alloy section after the spray cooling quenching treatment to 35 ℃, wherein the heating temperature of the aging treatment is 160 ℃, and the heat preservation time is 48 h.
TABLE 1 alloy composition design Table (wt%)
The performance of the fixtures having the alloy compositions shown in Table 1 was tested according to the relevant specifications of the GB/T228.1-2010 Metal Material + tensile test + part 1 and the QJ 1402-1988 Metal Low temperature thermal conductivity test method standards, and the results are shown in Table 2.
TABLE 2 test results
As can be seen from the test results shown in Table 2, the tensile strength of the fasteners of all the examples of the present invention is not lower than 290MPa, and the thermal conductivity is not lower than 205W/(m.K).
As can be seen from examples 1, 5, and 6 and comparative examples 5 and 6, the absence of Zr element and the excess amount of Zr element both cause imbalance in thermal conductivity and tensile strength.
It can be seen from examples 1, 7 and 8 and comparative examples 2 and 4 that the thermal conductivity and tensile strength are greatly reduced without adding Fe or by excessively adding Fe, and the thermal conductivity and tensile strength can be effectively improved by maintaining the content of Fe in the range of 0.05 to 0.15 wt%.
As can be seen from examples 1, 3, and 4 and comparative examples 1 and 3, no addition of RE element and an excessive amount of RE element both result in a decrease in thermal conductivity and tensile strength; it can be seen from example 1 and comparative examples 1 and 2 that the addition of Fe and RE simultaneously provides a material having both high thermal conductivity and tensile strength due to the synergistic effect between the two, and the addition of either of these materials alone does not achieve the above-described effects.
In a word, through the reasonable proportion and synergistic effect of Al, Si, Mg, Zr, RE, Fe element, for conventional commercial aluminum alloy, the aluminum alloy material that this embodiment provided has not only improved the thermal conductivity, has also guaranteed tensile strength.
The embodiment also provides a floor heating structure, as shown in fig. 1, the floor heating structure comprises a plurality of embedded floors 1 and a plurality of keels 2, wherein at least one keel 2, or one, two or more keels, is arranged below each embedded floor 1, and the embodiment takes the example that only one keel 2 is arranged below each embedded floor 1. Preferably, the embedded floor 1 in this embodiment is a plastic-wood floor, and is an environment-friendly material mainly made of wood (wood cellulose, plant cellulose), thermoplastic polymer material (PE plastic), processing aid, and the like, and has the properties and characteristics of wood and plastic, and has the advantages of fire resistance, water resistance, corrosion resistance, moisture resistance, no worm damage, no fungus growth, acid and alkali resistance, no toxicity, no pollution, and the like, and low maintenance cost.
Fig. 2 is a schematic structural view of the embedded floor provided by the embodiment, as shown in fig. 1 and fig. 2, two ends of each group of embedded floors 1 are respectively clamped with the embedded floors 1 adjacent to the two ends, and each keel 2 is clamped in the embedded floor 1 located right above the keel. Specifically, one end of each set of embedded floor boards 1 is provided with a first clamping groove 11 with a downward opening and is formed with a first boss 12, and the other end is provided with a second clamping groove 13 with an upward opening and is formed with a second boss 14.
In the embodiment, the first boss 12 and the second boss 14 are both rectangular bosses, the first clamping groove 11 and the second clamping groove 13 are both rectangular grooves, and the embedded floor 1 forms a lying S-shaped structure; of course, the first boss 12, the second boss 14, the first catching groove 11 and the second catching groove 13 are not limited to the above-described structure.
In the embodiment, the keel 2 and the embedded floor 1, and the embedded floor 1 are connected in a clamping manner, so that the connection manner is simple, the assembly and disassembly are convenient and quick, and the keel 2 is not required to be installed by screws, so that the noise of the floor can be effectively reduced; when the quality problem appears in the heating floor, only need dismantle the local area that has the problem, the maintenance of being convenient for.
Further, each set of the embedded floor boards 1 of the present embodiment includes a first floor board 101 and a second floor board 102 forming a first fastening groove 11 with the first floor board 101, the first floor board 101 and the second floor board 102 are mutually abutted, the first floor board 101 is provided with a second boss 14 and a second fastening groove 13, and the second floor board 102 is provided with a first boss 12. Through the arrangement, when any embedded floor 1 has a problem and needs to be replaced, only the embedded floor 1 at the local part is disassembled, the whole row of floors does not need to be disassembled, and the disassembly and the assembly are convenient and quick.
Fig. 3 is a partial enlarged schematic view at a position I in fig. 1, and as shown in fig. 3, the floor heating structure further includes a heat supply assembly 3, where the heat supply assembly 3 includes a plurality of fixing pieces 32 and a plurality of heat supply pipes 31, and two adjacent fixing pieces 32 are clamped; specifically, the mount 32 has the composition of an aluminum alloy material shown in table 1; specifically, in two adjacent fixing members 32, one fixing member 32 is provided with a third clamping groove 321, and the other fixing member 32 is provided with a third boss 322 capable of being inserted into the third clamping groove 321. In this embodiment, the third boss 322 is an arc-shaped boss, and the third clamping groove 321 is an arc-shaped groove capable of being inserted into the arc-shaped boss. Of course, the structures of the third boss 322 and the third engaging groove 321 are not limited to the above-mentioned structures, and may also be structures such as a rectangular groove and a rectangular boss. The two adjacent fixing pieces 32 are connected in the clamping manner, so that the structure is simple, and the mounting and dismounting are fast and convenient.
The heat supply pipe 31 in the embodiment adopts a ground heating pipe, the ground heating pipe has good stability and long-term pressure resistance, and the pipe is good in uniformity, stable in performance and good in creep resistance; the pipeline is easy to bend, convenient to construct and small in bending radius, stress of a bent part can be quickly relaxed, and the pipeline can be prevented from being damaged at the bent part due to stress concentration in the using process.
In the embodiment, at least one heating pipe 31 is arranged between two adjacent fixing pieces 32; specifically, two side surfaces of each fixing piece 32 in the width direction are provided with mounting grooves, and two mounting groove openings between the contact surfaces of two adjacent fixing pieces 32 are opposite to form mounting holes so as to clamp the heating pipe 31 in the mounting holes; the number of the heating pipes 31 between two adjacent fixing pieces 32 can be one, two or more, in the embodiment of the scheme, only one heating pipe 31 is arranged between two adjacent fixing pieces 32; the heat supply pipe 31 is fixed by adopting the clamping manner, so that the structure is simple, and the disassembly and the assembly are rapid and convenient; in the embodiment, the medium flowing through the heating pipe 31 is hot water.
Furthermore, a leveling layer 4 is arranged between the keel 2 and the heat supply assembly 3; the leveling layer 4 adopts sand with the particle size smaller than 5mm, preferably adopts sea sand, the laying thickness is 25mm, the particle size of the sea sand is smaller, and the leveling effect can be well guaranteed.
In the embodiment, a reflecting layer 7, a first heat insulation layer 61 and a first moisture-proof layer 51 are sequentially distributed below the heat supply assembly 3 from top to bottom, and a surface decoration layer 8 is arranged on the upper surface of the embedded floor 1; the reflecting layer 7 is made of aluminum foil, and the heat of the hot water in the heat supply pipe 31 can be transferred upwards as much as possible by arranging the reflecting layer 7, so that the heating effect is improved; the first thermal insulation layer 61 is made of a polyurethane material, and further reduces downward heat transfer; the first moisture-proof layer 51 is made of polyethylene materials, so that wet air or water vapor is prevented from entering the interior of the floor heating structure, the interior of the floor heating structure is ensured to be in a relatively dry environment, the bacterial growth is inhibited, and when water leaks from the heat supply pipe 31 due to an unexpected condition, the water can be prevented from leaking to the lower floors; the decorative layer 8 serves an aesthetic and durable function.
Further, in order to reduce the heat loss of the heat supply pipe 31 and avoid the leakage of the heat supply pipe 31 to cause the water leakage to the side, the circumferential side of the heat supply assembly 3 is provided with a second heat insulation layer 62, and the outer side of the second heat insulation layer 62 is provided with a second moisture-proof layer 52; the second insulation layer 62 is made of a polyurethane material and the second moisture barrier 52 is made of a polyethylene material.
The embodiment also provides an installation method of the floor heating structure, which is used for preparing the floor heating structure and specifically comprises the following steps:
(1) the first moisture-proof layer 51, the first heat insulation layer 61, the reflecting layer 7, the heat supply assembly 3 and the leveling layer 4 are sequentially paved from bottom to top, the second moisture-proof layer 52 is paved while the first moisture-proof layer 51 is paved, and the second heat insulation layer 62 is paved while the first heat insulation layer 61 is paved.
(2) When laying the heating assembly 3, inserting the heating pipe 31 into the mounting groove on one side of the laid fixing piece 32, clamping the other fixing piece 32 with the last laid fixing piece 32, and placing the heating pipe 31 in the mounting hole between the two fixing pieces 32; in this embodiment, the axial length of the installation hole is equal to the length of the subfloor 1.
(3) Referring to fig. 1, the installation sequence of the keel 2 and the subfloor 1 is illustrated in a right-to-left direction: a keel 2 can be installed first, and then a first floor 101 is installed, so that the keel 2 is inserted into the first floor 101; then a second floor 102 is installed, so that the second floor 102 is inserted into the second clamping groove 13; and (4) repeating the step (3).
(4) And laying a surface decoration layer 8 on the upper surface of the embedded floor 1.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. It will be apparent to those skilled in the art that other variations and modifications may be made in the foregoing description, and it is not necessary or necessary to exhaustively enumerate all embodiments herein. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, wherein the terms "first location" and "second location" are two different locations.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements can be directly connected, indirectly connected through an intermediate medium, or communicated with each other inside; the specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Claims (11)
1. The aluminum alloy material is characterized by consisting of the following components in parts by weight:
Mg:0.55～0.70wt％；
Si:0.30～0.50wt％；
Zr:0.05～0.18wt％；
RE:0.04～0.20wt％；
Fe:0.05～0.15wt％；
Mn:0.10～0.25wt％；
Ti:0.01～0.07wt％；
Cr:0.03～0.10wt％；
Zn:0.05～0.10wt％；
the total content of other inevitable impurities is less than or equal to 0.01 wt%, and the balance is Al;
the mass ratio of the Mg to the Si is less than or equal to 1.73.
2. The aluminum alloy material according to claim 1, wherein the content of the RE element is 0.06-0.18 wt.%.
3. The aluminum alloy material according to claim 1, wherein the content of Fe is 0.08 to 0.15 wt%.
4. The method for producing an aluminum alloy material according to any one of claims 1 to 3, comprising the steps of:
(1) selecting 99.7% of industrial pure aluminum ingots as raw materials, controlling the smelting temperature to be 700-750 ℃, and adding Al-Si, Al-Zr, Al-Fe, Al-RE intermediate alloy and pure Mg blocks;
(2) standing for 1-2 h at the temperature of 720-740 ℃;
(3) and (5) casting.
5. A fixing member made of the aluminum alloy material according to any one of claims 1 to 3.
6. The fixing member processing method according to claim 5, comprising the steps of smelting, casting, homogenizing, hot extrusion, and sequentially quenching, stretching, straightening and aging the section obtained by hot extrusion; the quenching comprises spray cooling quenching and air cooling quenching, the aluminum alloy section is cooled to 150-250 ℃ through the spray cooling quenching, and the aluminum alloy section is cooled to 30-50 ℃ from 150-250 ℃ through the air cooling quenching.
7. Ground heating structure, its characterized in that includes heat supply subassembly (3), heat supply subassembly (3) include many heating pipes (31) and a plurality of mounting (32) as in claim 5, adjacent two mounting (32) joint and between placed at least one heating pipe (31).
8. The floor heating structure according to claim 7, characterized by further comprising a plurality of embedded floor boards (1) and keels (2), wherein at least one keel (2) is arranged below each embedded floor board (1) and used for supporting the embedded floor boards (1); every the both ends on embedded floor (1) respectively with rather than adjacent embedded floor (1) joint, every fossil fragments (2) all joint is located directly over it in embedded floor (1).
9. The floor heating structure according to claim 8, characterized in that one end of each embedded floor (1) is provided with a first clamping groove (11) with a downward opening and is formed with a first boss (12), the other end of each embedded floor is provided with a second clamping groove (13) with an upward opening and capable of being inserted into the first boss (12), and is formed with a second boss (14) capable of being inserted into the first clamping groove (11) together with at least one keel (2).
10. The floor heating structure according to claim 9, characterized in that each group of the embedded floor boards (1) comprises a first floor board (101) and a second floor board (102) forming the first clamping groove (11) with the first floor board, the first floor board (101) and the second floor board (102) are mutually abutted, a second boss (14) and a second clamping groove (13) are arranged on the first floor board (101), and the first boss (12) is arranged on the second floor board (102).
11. The floor heating structure according to any one of claims 8 to 10, characterized in that a leveling layer (4) is arranged between the keel (2) and the heat supply assembly (3); a reflecting layer (7), a first heat-insulating layer (61) and a first moisture-proof layer (51) which are sequentially distributed from top to bottom are arranged below the heat supply assembly (3); the upper surface of the embedded floor (1) is provided with a surface decoration layer (8).
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