High-strength aluminum alloy material for door and window type heat insulation strip penetrating sectional materials

Abstract

The invention relates to the field of aluminum alloy door and window profiles, and particularly provides a high-strength aluminum alloy extrusion material suitable for a heat insulation strip penetrating profile. The aluminum alloy comprises the following alloy components: 0.49-0.54% of Si, 0.18-0.30% of Fe, less than or equal to 0.02% of Cu, 0.01-0.05% of Mn, 0.51-0.57% of Mg, less than or equal to 0.1% of Cr, less than or equal to 0.1% of Zn, less than or equal to 0.05% of Ti and the balance of Al. Through multiple tests, under the same process, compared with a 6063 aluminum alloy T6 state, the aluminum alloy material provided by the invention has higher mechanical properties such as hardness, tensile strength and yield strength under the condition of ensuring that a penetrating strip is not cracked during rolling, so that the collision damage prevention and wind pressure resistance of door and window profiles are greatly improved.

Description

Technical Field

[0001] The invention belongs to the field of aluminum alloy door and window profiles, and in particular relates to a high-strength aluminum alloy material used for heat-insulating strip-penetrating profiles of doors and windows. Background Art

[0002] In the building aluminum alloy door and window industry, the energy-saving requirements are getting higher and higher, and aluminum alloy heat-insulating strip profiles are widely used. In the current door and window industry, more and more owners like large-area doors and windows to meet their requirements for permeability. The commonly used 6063 grade aluminum alloy profiles have poor mechanical properties in the T5 state. In order to cope with large-area door and window openings, the profile section can only be increased to meet its wind pressure resistance requirements, which leads to an increase in profile costs and waste of resources. If T6 state aluminum alloy profiles are used, it is easy to cause profile cracking during the production of heat-insulating strip profiles, resulting in material scrapping. The entire process of door and window profiles from production, manufacturing, and installation involves many transportation processes, and there will be bumps in these processes. The higher the hardness of the profile, the smaller the deformation will be when it is bumped, and the scrapping will be reduced, but the higher the hardness, the greater the risk of rolling cracking of the strip. Summary of the invention

[0003] The purpose of the present invention is to provide a high-strength aluminum alloy extrusion material suitable for thermal insulation profiles. The material can ensure that the thermal insulation profiles do not crack during rolling while having higher mechanical properties than 6063 aluminum alloy T6, so as to save costs and meet the requirements of wind pressure resistance.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] A high-strength aluminum alloy material for heat-insulating profiles for doors and windows, the mass percentage of the chemical composition of the aluminum alloy material is:

[0006] Si: 0.49-0.54%,

[0007] Fe: 0.18-0.30%,

[0008] Cu: ≤0.02%,

[0009] Mn: 0.01~0.05%,

[0010] Mg: 0.51~0.57%,

[0011] Cr: ≤0.1%,

[0012] Zn:≤0.1%,

[0013] Ti: ≤0.05%,

[0014] and the balance Al.

[0015] A method for preparing the high-strength aluminum alloy material for heat-insulating strip profiles for doors and windows, comprising:

[0016] The components are configured according to the mass percentage of claim 1;

[0017] Then put it into the furnace for smelting at a temperature of 720-750℃;

[0018] Then add the refining agent and refine for 20 to 25 minutes;

[0019] Ingredient testing, adding corresponding chemical ingredients according to the test results to meet the percentage of claim 1;

[0020] Then add the refining agent again and refine for 20 to 25 minutes;

[0021] Let stand for more than 30 minutes;

[0022] Prepare aluminum bars according to the specifications of cast bars.

[0023] The aluminum rod is heated to 500-520℃ and extruded into a shaped material.

[0024] Mist quenching, the temperature after quenching is ≤100℃;

[0025] Aging treatment for 2h, temperature 200±5℃;

[0026] The strip is rolled into shape.

[0027] Compared with the 6063 aluminum alloy T6 state, the aluminum alloy material provided by the present invention has higher mechanical properties such as hardness, tensile strength, and yield strength while ensuring that the strip is rolled without cracking, thereby greatly improving the anti-bump and wind pressure resistance of the door and window profiles. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a flow chart of the preparation process of the present invention. DETAILED DESCRIPTION

[0029] like Figure 1 As shown, the present embodiment provides a method for preparing a high-strength aluminum alloy material for a heat-insulating strip profile for doors and windows, comprising:

[0030] Step 1: configure the components according to mass percentage; the mass percentage of the chemical composition is: Si: 0.49-0.54%, Fe: 0.18-0.30%, Cu: ≤0.02%, Mn: 0.01-0.05%, Mg: 0.51-0.57%, Cr: ≤0.1%, Zn: ≤0.1%, Ti: ≤0.05%, and the balance Al.

[0031] Step 2: Put it into the furnace for smelting at a temperature of 720-750°C;

[0032] Step 3: Add refining agent and refine for 20-25 minutes;

[0033] Step 4: Component testing, adding corresponding chemical components according to the test results to make it meet the percentage of claim 1;

[0034] Step 5: Add refining agent again and refine for 20 to 25 minutes;

[0035] Step 6: Let stand for more than 30 minutes;

[0036] Step 7: Prepare aluminum bars according to the specifications of the casting bars.

[0037] Step 8: Heat the aluminum rod to 500-520°C and extrude it into a shaped material.

[0038] Step 9: Mist quenching, the temperature after quenching is ≤100℃;

[0039] Step 10: Aging treatment for 2h, temperature 200±5℃;

[0040] Step 11: Roll the strips into shape.

[0041] Ten samples of the prepared profiles were taken, numbered 1 to 10, and mechanical properties were tested. The test results are shown in Table 1.

[0042] Table 1 Mechanical properties test results of aluminum alloy material T6 state

[0043]

[0044]

[0045] Table 2 Mechanical properties test results of 6063 titanium alloy in the prior art

[0046]

[0047]

[0048] Table 3 Mechanical properties test results of titanium alloy prepared according to the preparation method of this application according to the 6063 ratio

[0049]

[0050]

[0051] Tables 1, 2, and 3 are all produced using the same cross-section mold. Tables 1 and 2 are the mechanical property test results of the aluminum alloy material of the present invention and the conventional 6063 alloy material produced under the same process parameters. The results show that the tensile strength, yield stress, and hardness of the profiles have been significantly improved, and the longitudinal shear characteristic value of the insulation profile has decreased, but it meets the standard requirement of ≥30N / mm. This is caused by the increase in strength, and its longitudinal shear characteristic value can be improved by appropriately increasing the rolling pressure. Table 3 shows that after adjusting the quenching process and aging process, the mechanical properties have reached the values ​​shown in the figure, and rolling cracking begins to occur.

[0052] The above description is only a preferred implementation manner of the present invention, but the protection scope of the present invention is not limited thereto, and any modification and replacement based on the technical solution and inventive concept provided by the present invention should be included in the protection scope of the present invention.

Claims

1. A high-strength aluminum alloy material for heat-insulating profiles for doors and windows, characterized in that: The mass percentage of the chemical composition of aluminum alloy materials is: Si: 0.49-0.54%, Fe: 0.18-0.30%, Cu: ≤0.02%, Mn: 0.01~0.05%, Mg: 0.51~0.57%, Cr：≤0.1％， Zn:≤0.1%, Ti: ≤0.05%, and the balance Al.

2. A method for preparing the high-strength aluminum alloy material for heat-insulating strip profiles for doors and windows according to claim 1, characterized in that: include: The components are configured according to the mass percentage of claim 1; Then put it into the furnace for smelting at a temperature of 720-750℃; Then add the refining agent and refine for 20 to 25 minutes; Ingredient testing, adding corresponding chemical ingredients according to the test results to meet the percentage of claim 1; Then add the refining agent again and refine for 20 to 25 minutes; Let stand for more than 30 minutes; Prepare aluminum bars according to the specifications of cast bars. The aluminum rod is heated to 500-520℃ and extruded into a shaped material. Mist quenching, the temperature after quenching is ≤100℃; Aging treatment for 2h, temperature 200±5℃; The strip is rolled into shape.

Images