CN115466885A - High-performance aluminum alloy pipe, preparation method thereof and aluminum-plastic composite pipe - Google Patents

High-performance aluminum alloy pipe, preparation method thereof and aluminum-plastic composite pipe Download PDF

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Publication number
CN115466885A
CN115466885A CN202111204721.0A CN202111204721A CN115466885A CN 115466885 A CN115466885 A CN 115466885A CN 202111204721 A CN202111204721 A CN 202111204721A CN 115466885 A CN115466885 A CN 115466885A
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aluminum alloy
alloy pipe
pipe
performance
aluminum
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冯书平
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Zhangjiagang Omas Precision Metal Technology Co ltd
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Zhangjiagang Omas Precision Metal Technology Co ltd
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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
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/151—Coating hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • 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
    • 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
    • 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
    • C22C21/10—Alloys based on aluminium with zinc as the next major constituent
    • 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
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/14—Alloys based on aluminium with copper as the next major constituent with silicon
    • 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
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
    • 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
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/18—Alloys based on aluminium with copper as the next major constituent with zinc
    • 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
    • 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
    • C22F1/043—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 silicon as the next major constituent
    • 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
    • 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
    • C22F1/053—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 zinc as the next major constituent
    • 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
    • C22F1/057—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 copper as the next major constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2597/00—Tubular articles, e.g. hoses, pipes

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

The invention relates to C22C 21/10, in particular to a high-performance aluminum alloy pipe and a preparation method thereof. The composite material comprises the following raw materials in percentage by mass: 0.01 to 0.05 percent of copper, 0.005 to 0.05 percent of manganese, 0.01 to 0.06 percent of magnesium, 0.01 to 0.1 percent of zinc, 0.01 to 0.06 percent of titanium, 0.005 to 0.05 percent of tungsten, 0.01 to 0.65 percent of silicon, 0.01 to 0.65 percent of ferrum, 0.005 to 0.02 percent of nickel, 0.01 to 0.07 percent of molybdenum, less than or equal to 0.2 percent of others, and the balance of aluminum. The aluminum alloy pipe prepared by the method has high mechanical property and corrosion resistance, reduces the heat dissipation speed of the pipe, and improves the antibacterial property of the pipe.

Description

High-performance aluminum alloy pipe, preparation method thereof and aluminum-plastic composite pipe
Technical Field
The invention relates to C22C 21/10, in particular to a high-performance aluminum alloy pipe and a preparation method thereof and an aluminum-plastic composite pipe.
Background
The aluminum alloy pipe is a light metal material with a certain amount of other alloying elements added on the basis of aluminum, and has the advantages of high strength, light weight, good corrosion resistance and the like.
Patent CN201580007692.5 discloses a high strength cast aluminum alloy for high pressure die casting, which includes an aluminum alloy pack prepared by using 4-14% magnesium silicide, 4-12% magnesium, 2-12% X element and impurities such as aluminum, has excellent strength.
In patent CN201910925249.6, a high-strength high-toughness aluminum alloy and a preparation method thereof, the aluminum alloy is prepared by controlling the mass ratio of magnesium to aluminum and controlling the content of each element in the system, so that uniformly distributed close phase Al3 (RE, zr) is formed, and the strength and toughness of the aluminum alloy are improved.
However, when the aluminum alloy pipe prepared in the prior art is combined with plastic to prepare an aluminum-plastic composite pipe for a cold-hot water pipe of a building, the pipe wall is easy to be dislocated due to long-term expansion with heat and contraction with cold to generate leakage, and the application of the aluminum alloy pipe in a pipeline system is seriously influenced.
Disclosure of Invention
In order to solve the technical problems, the first aspect of the invention provides a high-performance aluminum alloy pipe, which comprises the following raw materials in percentage by mass: 0.01-0.05% of copper, 0.005-0.05% of manganese, 0.01-0.06% of magnesium, 0.01-0.1% of zinc, 0.01-0.06% of titanium, 0.005-0.05% of tungsten, 0.01-0.65% of silicon, 0.01-0.65% of iron, 0.005-0.02% of nickel, 0.01-0.07% of molybdenum and the balance of aluminum.
Preferably, the total mass of the silicon and the iron is less than or equal to 0.65 percent.
Preferably, the high-performance aluminum alloy pipe further comprises at least one of scandium, chromium, cerium, zirconium, silver, lead and boron.
Further preferably, the high-performance aluminum alloy pipe further comprises chromium, silver and scandium. The mass ratio of the chromium to the silver to the scandium is (1-3): (2-5): (1-3).
When plastic is used as a hot water pipe, the high-performance aluminum alloy pipe is easy to cause pipe wall dislocation due to long-term expansion with heat and contraction with cold so as to generate leakage. The invention finds that the mechanical property and the corrosion resistance of the aluminum alloy pipe can be further improved and the leakage caused by expansion with heat and contraction with cold can be prevented by limiting the content of each element in the aluminum alloy pipe and adding the elements of chromium, silver and scandium. The presumption is that due to the addition of chromium, silver and scandium elements in the system, the connection and restriction formed by different atoms are further controlled, the dissolution of tungsten in the system is promoted, the harmful effect of iron is eliminated, the force among the atoms is changed, the crystal phase structure in the system is changed, the mechanical property and the corrosion resistance of the system are improved, and the pipe wall dislocation between the aluminum alloy pipe and plastic is reduced, so that the leakage is prevented. In addition, the antibacterial performance of the pipe can be improved due to the existence of the silver element, and when the mass ratio of chromium to silver to scandium is (3-5): (2-3): and (1-2), the aluminum alloy pipe has the best performance, and is particularly suitable for preparing the aluminum-plastic composite hot water pipe.
Further preferably, the silicon/aluminum mass ratio is (0.2): (99.35-99.45).
Because aluminum has good thermal conductivity and the thermal conductivity of other metal elements added in the system, such as silver, copper, magnesium and the like, is extremely excellent, the aluminum alloy pipe is easy to dissipate heat quickly when transporting a heat medium. The invention further limits the mass ratio of silicon to aluminum, and effectively prevents the heat loss of the heat medium in the aluminum alloy pipe from influencing the use effect while keeping better mechanical property and corrosion resistance. The reason is presumed that due to the further limitation of the mass ratio of silicon to aluminum in the system, the barrier effect on free electrons in the system is increased, the scattering of electrons is increased, the crystal phase structure is refined, the crystal size is reduced, and the heat exchange speed of the material is delayed, especially when the mass ratio of silicon to aluminum is (0.2): (99.35-99.45), the aluminum alloy pipe has the best heat-insulating effect.
Preferably, the total mass of the copper and the magnesium is more than or equal to 0.03 percent.
Further preferably, the high-performance aluminum alloy pipe comprises the following raw materials in percentage by mass: 0.03% of copper, 0.01% of manganese, 0.03% of magnesium, 0.05% of zinc, 0.02% of titanium, 0.01% of tungsten, 0.2% of silicon, 0.01% of iron, 0.02% of nickel, 0.04% of molybdenum and the balance of aluminum.
Still further preferably, the high-performance aluminum alloy pipe comprises the following raw materials in percentage by mass: 0.03% of copper, 0.01% of manganese, 0.03% of magnesium, 0.05% of zinc, 0.02% of titanium, 0.01% of tungsten, 0.2% of silicon, 0.01% of iron, 0.02% of nickel, 0.04% of molybdenum, 0.02% of chromium, 0.04% of silver, 0.02% of scandium and the balance of aluminum.
The second aspect of the invention provides a preparation method of a high-performance aluminum alloy pipe, which comprises the following steps: adding the raw materials into a smelting furnace for melting, casting and refining to obtain an aluminum alloy ingot; homogenizing an aluminum alloy ingot, and obtaining a high-performance aluminum alloy pipe by hot rolling, annealing, cold rolling, deep cooling deformation treatment and solid solution water quenching, wherein the impurity content of the aluminum alloy pipe is determined to be less than or equal to 0.1%.
Preferably, the homogenization treatment temperature is 430-470 ℃, and the time is 13-17h; the hot rolling temperature is 370-420 ℃, and the cryogenic deformation treatment temperature is-150-120 ℃.
The third aspect of the invention provides an aluminum-plastic composite pipe, which sequentially comprises an inner layer, a first bonding layer, an aluminum alloy layer, a second bonding layer and an outer layer from inside to outside; the preparation raw material of the aluminum alloy layer is the high-performance aluminum alloy pipe.
Preferably, the inner layer preparation raw material comprises a material A and a material B. The mass ratio of the material A to the material B is (93-98): (2-7).
Preferably, the material A comprises 80-100 parts by weight of material A high-density polyethylene, 8-15 parts by weight of metallocene linear low-density polyethylene, 0.07-0.13 part by weight of initiator, 1-3 parts by weight of silicon-containing compound, 0.07-0.13 part by weight of polymerization inhibitor, 0.07-0.13 part by weight of first antioxidant and 0.7-1.5 parts by weight of organic zinc.
Preferably, the material a high density polyethylene comprises a first high density polyethylene and a second high density polyethylene. The mass ratio of the first high-density polyethylene to the second high-density polyethylene is 85: (2-7).
Preferably, the first high density polyethylene has a melt flow rate of 5 to 10g/10min at 190 ℃/2.16 kg.
Preferably, the second high density polyethylene is 0.5 to 1.0g/10min.
Preferably, the metallocene linear low density polyethylene has a melt flow rate of 0.1 to 0.3g/10min at 190 ℃/2.16 kg.
Preferably, the silicon-containing compound is a silicon-containing compound having a double bond.
Further preferably, the silicon-containing compound is vinyltris (2-methoxyethoxy) silane.
Preferably, the organic zinc is zinc ricinoleate.
Preferably, the B material comprises 100 parts of the B material high-density polyethylene, 0.5-1 part of catalyst and 0.2-0.8 part of second antioxidant in parts by weight.
Preferably, the melt flow rate of the B material high-density polyethylene at 190 ℃/2.16kg is 5-10g/10min.
The preparation method for preparing the inner layer material comprises the following steps: respectively stirring and uniformly mixing the raw materials of the material A and the raw materials of the material B at a high speed, extruding and granulating to obtain the material A and the material B, uniformly mixing the material A and the material B, and melting and extruding together to obtain the inner layer material. The melt extrusion temperature is 160-220 ℃.
Preferably, the outer layer raw material comprises, by weight, 75-85 parts of polyolefin, 5-10 parts of polyester, 8-13 parts of a flame retardant, 0.8-1.3 parts of a lubricant, 1.2-1.7 parts of an antioxidant, 3-8 parts of a filler and 0.8-1.5 parts of a coupling agent.
Preferably, the polyolefin comprises polyethylene and polystyrene. The mass ratio of the polyethylene to the polystyrene is (65-80) to (25-32).
The polyethylene is high density polyethylene, and the melt flow rate of the polyethylene at 190 ℃/2.16kg is 5-10g/10min.
The melt flow rate of the polystyrene at 230 ℃/3.8kg is 8-12cm 3 /10min。
Preferably, the phosphorus content in the flame retardant is more than or equal to 20 percent.
Preferably, the lubricant includes zinc stearate, ethylene bis stearamide and oxidized polyethylene wax. The mass ratio of the zinc stearate to the ethylene bis stearamide to the oxidized polyethylene wax is (0.8-1.2): (0.8-1.2): (2-5).
Preferably, the filler comprises silicon carbide and nano calcium carbonate, and the mass ratio of the silicon carbide to the nano calcium carbonate is (1-3): 1.
preferably, the polyester is polyethylene terephthalate-1, 4-cyclohexanedimethanol ester.
Preferably, the coupling agent is gamma-glycidoxypropyltrisilicon.
The preparation method for preparing the outer layer material comprises the following steps: adding the raw materials into a high-speed stirrer, uniformly mixing, and extruding and granulating to obtain the outer layer material.
A preparation method of an aluminum-plastic composite pipe comprises the following steps:
1) Extruding, rolling, annealing, stretching and forming the aluminum alloy pipe to obtain an aluminum alloy pipe;
2) Then, blowing the five-layer co-extruded composite film on the inner wall of the aluminum alloy pipe through the inner layer and the hot melt adhesive which are simultaneously extruded by the inner layer extruder under pressure;
3) Then the outer layer and the hot melt adhesive which are simultaneously extruded by the outer layer extruder are coated on the outer wall of the aluminum alloy pipe, and then the aluminum alloy pipe is cooled and extruded under the action of a tractor to obtain the aluminum-plastic composite pipe.
Has the beneficial effects that:
1) When the aluminum alloy pipe is used as a hot water pipe together with plastic, the pipe wall is easy to be dislocated due to long-term expansion with heat and contraction with cold to cause leakage, the contents of chromium, silver and scandium in the system are further limited through the mutual matching of all elements in the system, the connection and restriction formed by atoms are changed, the mechanical property and the corrosion resistance of the aluminum alloy pipe are improved, meanwhile, the leakage is prevented, and the antibacterial property of the aluminum alloy pipe is further improved.
2) The invention controls the generation of each crystal phase structure in the system, refines crystal grains and delays the heat exchange speed of the material by limiting the content and variety of each element in the system and further limiting the mass ratio of silicon to aluminum.
3) The aluminum-plastic composite pipe prepared by controlling the types and the contents of the preparation raw materials of each layer through the aluminum alloy pipe and the plastic has the excellent performances of high strength, good corrosion resistance, high antibacterial property and the like.
Detailed Description
Examples
Example 1
A high-performance aluminum alloy pipe comprises the following raw materials in percentage by mass: 0.03% of copper, 0.01% of manganese, 0.03% of magnesium, 0.05% of zinc, 0.02% of titanium, 0.01% of tungsten, 0.2% of silicon, 0.01% of iron, 0.02% of nickel, 0.04% of molybdenum, 0.02% of chromium, 0.04% of silver, 0.02% of scandium and the balance of aluminum.
A preparation method of a high-performance aluminum alloy pipe comprises the following steps: adding the raw materials into a smelting furnace for melting, casting and refining to obtain an aluminum alloy ingot; homogenizing the aluminum alloy cast ingot, and carrying out hot rolling, annealing, cold rolling, deep cooling deformation treatment and solid solution water quenching to obtain the high-performance aluminum alloy pipe. The homogenization treatment temperature is 450 ℃, and the time is 16h; the hot rolling temperature is 400 ℃, and the cryogenic deformation treatment temperature is-135 ℃.
An aluminum-plastic composite pipe comprises an inner layer, a first bonding layer, an aluminum alloy layer, a second bonding layer and an outer layer from inside to outside in sequence; the preparation raw material of the aluminum alloy layer is the high-performance aluminum alloy pipe.
The inner layer preparation raw material comprises a material A and a material B. The mass ratio of the material A to the material B is 95:5.
the material A comprises 90 parts by weight of material A high-density polyethylene, 10 parts by weight of metallocene linear low-density polyethylene, 0.1 part by weight of initiator, 2 parts by weight of silicon-containing compound, 0.1 part by weight of polymerization inhibitor, 0.1 part by weight of first antioxidant and 1 part by weight of dispersant. The material B comprises 100 parts of material B high-density polyethylene, 0.8 part of catalyst and 0.5 part of second antioxidant.
A material: the material A high-density polyethylene comprises a first high-density polyethylene and a second high-density polyethylene, and the mass ratio of the first high-density polyethylene to the second high-density polyethylene is 85:5. the first high density polyethylene has a melt flow rate of 8g/10min at 190 ℃/2.16kg, model: exxonMobil TM HDPE HMA 025. 0.7g/10min of the second high density polyethylene. The model is as follows: exxonMobil TM HDPE HTA108。
The melt flow rate of the metallocene linear low density polyethylene at 190 ℃/2.16kg is 0.2g/10min, and the types are as follows: exceeded TM XP 6026 Series。
The initiator is dicumyl peroxide. The silicon-containing compound is a silicon-containing compound with double bonds, and the silicon-containing compound is vinyl tri (2-methoxyethoxy) silane (CAS No. 1067-53-4) which is purchased from Jeccard chemical Co., ltd. The polymerization inhibitor is p-tert-butyl catechol, is purchased from Yingrong chemical industry Co., ltd, changzhou city, and has the model number: the inhibitor TBC, and the first antioxidant is antioxidant 168. The dispersing agent is zinc ricinoleate. Purchased from pharmaceutical chemical limited of huge dragon hall, hubei.
The material B comprises 100 parts of material B high-density polyethylene, 0.8 part of catalyst and 0.5 part of second antioxidant by weight.
B, material B: the melt flow rate of the B material high-density polyethylene at 190 ℃/2.16kg is 8g/10min, and the type is as follows: exxonMobil TM HDPE HMA 025. The catalyst is dibutyltin dilaurate. The second antioxidant comprises an antioxidant 1010 and an antioxidant 168, and the mass ratio of the antioxidant 1010 to the antioxidant 168 is 1.
The outer layer comprises, by weight, 80 parts of polyolefin, 7 parts of polyester, 10 parts of flame retardant, 1 part of lubricant, 1.5 parts of antioxidant, 5 parts of filler and 1 part of coupling agent.
The polyolefins include polyethylene and polystyrene. The mass ratio of the polyethylene to the polystyrene is 70. The polyethylene is high-density polyethylene, the melt flow rate of the polyethylene at 190 ℃/2.16kg is 8g/10min, and the polyethylene has the following model: exxonMobil TM HDPE HMA 025. The polystyrene has a melt flow rate of 10.8cm at 230 ℃/3.8kg 3 And/10 min. Purchased from new huamei plastics ltd, qingdao, model number: PH-888H.
The phosphorus content in the flame retardant is more than or equal to 23 percent, and the flame retardant is a flame retardant Doher-737-1 which is purchased from Daorhel New Material science and technology Co., ltd, dongguan.
The lubricant includes zinc stearate, ethylene bis stearamide and oxidized polyethylene wax. The mass ratio of the zinc stearate to the ethylene bis stearamide to the oxidized polyethylene wax is 1:1:3.
the antioxidant comprises an antioxidant 1010 and an antioxidant 168, wherein the mass ratio of the antioxidant 1010 to the antioxidant 168 is 1.
The filler comprises silicon carbide and nano calcium carbonate, and the mass ratio of the silicon carbide to the nano calcium carbonate is 2.
The polyester is polyethylene glycol terephthalate-1, 4-cyclohexane dimethanol ester which is purchased from Keye chemical industry and has the following types: eastman chemical TX1001.
The coupling agent is gamma-glycidoxypropyl trisilicon (CAS number: 2530-83-8) and is available from Jeccard chemical Co., ltd.
The hot melt adhesive for the first bonding layer is ethylene-vinyl acetate copolymer. The viscosity of the hot melt adhesive for the first adhesive layer was 3000mPa · s at 175 ℃. From Shanghai Tiandiao novel materials science and technology Limited, model: TD-143.
The hot melt adhesive for the second bonding layer is ethylene-vinyl acetate copolymer. The viscosity of the hot melt adhesive for the first adhesive layer was 3000mPa · s at 175 ℃. From Shanghai Tiandiao novel materials science and technology Limited, model: TD-143.
The inlayer, first tie coat, the aluminum alloy layer, the second tie coat, outer thickness ratio is 1.5mm:0.03mm:0.7mm:0.02mm:0.5mm.
A preparation method of an aluminum-plastic composite pipe comprises the following steps:
1) Extruding, rolling, annealing, stretching and forming the aluminum alloy pipe to obtain an aluminum alloy pipe;
2) Then, blowing the five-layer co-extruded composite film on the inner wall of the aluminum alloy pipe through the inner layer and the hot melt adhesive which are simultaneously extruded by the inner layer extruder under pressure;
3) Then the outer layer and the hot melt adhesive which are simultaneously extruded by the outer layer extruder are coated on the outer wall of the aluminum alloy pipe, and then the aluminum alloy pipe is cooled and extruded under the action of a tractor to obtain the aluminum-plastic composite pipe.
Example 2
The specific implementation mode of the high-performance aluminum alloy pipe is the same as that in example 1, except that the aluminum alloy pipe comprises the following raw materials: 0.03% of copper, 0.01% of manganese, 0.03% of magnesium, 0.05% of zinc, 0.02% of titanium, 0.01% of tungsten, 0.2% of silicon, 0.01% of iron, 0.02% of nickel, 0.04% of molybdenum, 0.025% of chromium, 0.03% of silver, 0.025% of scandium and the balance of aluminum.
Example 3
The specific implementation mode of the aluminum-plastic composite pipe is the same as that of example 1, except that the high-density ethylene, the metallocene polyethylene, the initiator, the cross-linking agent, the polymerization inhibitor, the pigment and the filler and the dispersant are adopted
Comparative example 1
The specific implementation mode of the high-performance aluminum alloy pipe is the same as that in example 1, except that the aluminum alloy pipe comprises the following raw materials: 0.03% of copper, 0.01% of manganese, 0.03% of magnesium, 0.05% of zinc, 0.02% of titanium, 0.01% of tungsten, 0.2% of silicon, 0.01% of iron, 0.02% of nickel, 0.04% of molybdenum, 0.02% of chromium, 0.01% of silver, 0.02% of scandium and the balance of aluminum.
Comparative example 2
The specific implementation mode of the high-performance aluminum alloy pipe is the same as that in example 1, except that the aluminum alloy pipe comprises the following raw materials: 0.03% of copper, 0.01% of manganese, 0.03% of magnesium, 0.05% of zinc, 0.02% of titanium, 0.01% of tungsten, 0.05% of silicon, 0.01% of iron, 0.02% of nickel, 0.04% of molybdenum, 0.02% of chromium, 0.04% of silver, 0.02% of scandium and the balance of aluminum.
Performance test
1. And (3) testing the heat conductivity coefficient: the thermal conductivity of the aluminum alloy was tested on a QETRID-type thermal conductivity meter.
2. Testing the thermal expansion coefficient: the test is carried out on a DIL402C device, the test temperature is 25-100 ℃, and the heating rate is 10 ℃/min.
3. And (3) corrosion resistance testing: the test was carried out according to GB/T6892.
Table 1 results of performance testing
Figure BDA0003306432040000081
4. And (3) testing the burst strength and the static pressure strength: the test was performed according to J/T108.
Table 2 results of performance testing
Figure BDA0003306432040000082

Claims (10)

1. The high-performance aluminum alloy pipe is characterized by comprising the following raw materials in percentage by mass: 0.01-0.05% of copper, 0.005-0.05% of manganese, 0.01-0.06% of magnesium, 0.01-0.1% of zinc, 0.01-0.06% of titanium, 0.005-0.05% of tungsten, 0.01-0.65% of silicon, 0.01-0.65% of iron, 0.005-0.02% of nickel, 0.01-0.07% of molybdenum and the balance of aluminum.
2. The high-performance aluminum alloy pipe as recited in claim 1, wherein the total mass of Si and Fe is 0.65% or less.
3. The high-performance aluminum alloy pipe as recited in claim 1 or 2, wherein the high-performance aluminum alloy pipe further comprises at least one of scandium, chromium, cerium, zirconium, silver, lead and boron.
4. A high performance aluminum alloy pipe as recited in claim 3, wherein the high performance aluminum alloy pipe further comprises chromium, silver, and scandium.
5. A high performance aluminum alloy pipe according to any one of claims 1 to 4, wherein the silicon/aluminum mass ratio is (0.2): (99.35-99.45).
6. The high-performance aluminum alloy pipe as recited in any one of claims 1 to 5, wherein the total mass of the copper and the magnesium is 0.03% or more.
7. The high-performance aluminum alloy pipe as recited in any one of claims 1 to 6, comprising the following raw materials in percentage by mass: 0.03% of copper, 0.01% of manganese, 0.03% of magnesium, 0.05% of zinc, 0.02% of titanium, 0.01% of tungsten, 0.2% of silicon, 0.01% of iron, 0.02% of nickel, 0.04% of molybdenum and the balance of aluminum.
8. A method for preparing a high performance aluminum alloy pipe according to any one of claims 1 to 7, comprising the steps of: adding the raw materials into a smelting furnace for melting, casting and refining to obtain an aluminum alloy ingot; homogenizing the aluminum alloy cast ingot, and carrying out hot rolling, annealing, cold rolling, deep cooling deformation treatment and solid solution water quenching to obtain the high-performance aluminum alloy pipe.
9. The aluminum-plastic composite pipe is characterized by comprising an inner layer, a first bonding layer, an aluminum alloy layer, a second bonding layer and an outer layer from inside to outside in sequence; wherein, the preparation raw material of the aluminum alloy layer is the high-performance aluminum alloy pipe material as claimed in any one of claims 1 to 7.
10. The aluminum-plastic composite pipe as claimed in claim 9, wherein the inner layer preparation raw material comprises a material A and a material B.
CN202111204721.0A 2021-10-15 2021-10-15 High-performance aluminum alloy pipe, preparation method thereof and aluminum-plastic composite pipe Pending CN115466885A (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102978468A (en) * 2012-11-09 2013-03-20 安徽欣意电缆有限公司 Al-Fe-W-RE aluminum alloy, and preparation method and power cable thereof
CN104500861A (en) * 2014-11-20 2015-04-08 江阴市南方造粒厂有限公司 High-viscosity aluminum-plastic pipe

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102978468A (en) * 2012-11-09 2013-03-20 安徽欣意电缆有限公司 Al-Fe-W-RE aluminum alloy, and preparation method and power cable thereof
CN104500861A (en) * 2014-11-20 2015-04-08 江阴市南方造粒厂有限公司 High-viscosity aluminum-plastic pipe

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