CN-122012996-A - 6-Series high-strength aluminum alloy material capable of being rapidly extruded

Abstract

The invention discloses a 6-series high-strength aluminum alloy material capable of being rapidly extruded, which comprises the following element components in percentage by mass, wherein the balance of ：Si：0.1%～2.0%,Fe：≤0.5%,Cu：0.01%～1.5%,Mn：0.01%～1.5%,Mg：0.2%～2.0%,Cr：0.01%～0.5%,Ti：0.01%～0.3%,Zn：≤1.5%,Bi：0.1%～1.0%,Pb：0.1%～0.5%, is Al and unavoidable impurities. Bi and Pb elements are added into the components, bi and Pb are low-melting-point elements, grain boundaries can be weakened locally during high-temperature extrusion, plastic deformation capacity of the material is improved, extrusion speed of the profile can reach 18m/min, time from profile demolding to quenching is shortened due to high-speed extrusion, quenching temperature is improved, tensile strength of an aluminum alloy material is more than or equal to 380MPa, yield strength is more than or equal to 350MPa, and elongation is more than or equal to 10%.

Inventors

• LI YUNLIANG
• LI FALU
• WEI FENG
• WAN XIAOMIN
• XU XIANGLIN
• JU SHUAI
• ZHANG XIJUAN

Assignees

• 江苏恒义工业技术有限公司
• 恒义超然工业技术(上海)有限公司

Dates

Publication Date

20260512

Application Date

20260123

Claims (5)

1. 1. A6-series high-strength aluminum alloy material capable of being rapidly extruded is characterized in that ：Si：0.1%～2.0%,Fe：≤0.5%,Cu：0.01%～1.5%,Mn：0.01%～1.5%,Mg：0.2%～2.0%,Cr：0.01%～0.5%,Ti：0.01%～0.3%,Zn：≤1.5%,Bi：0.1%～1.0%,Pb：0.1%～0.5%, comprises the following element components in percentage by mass, and the balance is Al and unavoidable impurities.
2. 2. The rapid extrudable 6-series high-strength aluminum alloy material according to claim 1, wherein ：Si：0.6%～1.0%,Fe：0.1%～0.3%,Cu：0.1%～0.5%,Mn：0.2%～0.6%,Mg：0.7%～1.5%,Cr：0.1%～0.2%,Ti：0.02%～0.1%,Zn：0～0.5%,Bi：0.1%～0.8%,Pb：0.1%～0.45%, the remainder is Al and unavoidable impurities, which are composed of the following elemental components by mass fraction.
3. 3. The rapidly extrudable 6-series high-strength aluminum alloy material according to claim 1, wherein the tensile strength is not less than 380MPa, the yield strength is not less than 350MPa, and the elongation is not less than 10%.
4. 4.A method for casting and extruding a rapidly extrudable 6-series high-strength aluminum alloy material according to any one of claims 1 to 3, comprising the steps of: (1) Smelting the raw materials except magnesium and titanium in a smelting furnace at 700-800 ℃ for 3-5 hours, adding the magnesium raw material, stirring, and smelting for 20-50 minutes; (2) Argon is filled, a refining agent is added, degassing and deslagging are carried out, refining is carried out for 10-20 min, and then standing is carried out for 10-20 min; (3) Feeding aluminum titanium boron on line for casting, and adding Ti element to obtain a casting aluminum ingot; (4) Heating the cast aluminum ingot to 500-580 ℃, and preserving heat and homogenizing for 5-20 h; (5) Extruding an aluminum ingot into a section bar, and carrying out online quenching; (6) Heating to 100-250 ℃, preserving heat for 5-20 h, and air cooling.
5. 5. The casting and extrusion method according to claim 4, wherein in the step (5), the profile quenching temperature is 535-570 ℃, and the extrusion speed is 5-18 m/min.

Description

6-Series high-strength aluminum alloy material capable of being rapidly extruded Technical Field The invention belongs to the technical field of aluminum alloy material processing, and particularly relates to a 6-series high-strength aluminum alloy material capable of being rapidly extruded. Background The 6-series aluminum alloy is an aluminum alloy taking Al-Mg-Si as a main alloy element and taking Mg 2 Si phase as a strengthening phase, and belongs to heat treatment strengthening aluminum alloys. The 6-series aluminum alloy has the advantages of medium strength, high corrosion resistance, no stress corrosion cracking tendency, good welding performance, good cold workability, unchanged welding area corrosion performance, good formability and technological properties and the like, and is suitable for anodic oxidation coloring and enameling. According to the national standard GB/T3190-2020, 6 series aluminum alloy brands are produced at present, namely 6005, 6060, 6061, 6063, 6082, 6201, 6262, 6463 and 6A02, the most widely applied alloys are 6061 and 6063, and the main products are extruded profiles, so that the most preferred extruded alloys are obtained. The composition difference of the aluminum alloys is mainly represented by the contents of elements such as silicon (Si), magnesium (Mg), copper (Cu), manganese (Mn) and the like, thereby affecting the mechanical properties and the processing properties thereof. With the increasing demand of new energy automobiles for light weight development, aluminum alloy materials are widely used for the production of automobile parts. The material strength is one of the key factors affecting the design of photovoltaic structural members. With the improvement of the material strength, the structural member can reduce the section size and the wall thickness on the premise of meeting the same performance requirement, thereby realizing the saving of materials and the light weight of the system. The patent document CN119932374A discloses a 6-series aluminum alloy material, an extruded section and a preparation method thereof, wherein the mass content of each element is 0.65-0.9 percent of Si, 0.85-1.1 percent of Mg, 0.5-0.8 percent of Cu, 0.05-0.18 percent of Mn, 0.05-0.15 percent of Cr, less than or equal to 0.1 percent of Zn, less than or equal to 0.1 percent of Ti, less than or equal to 0.15 percent of Fe, and the balance of Al and unavoidable impurities. The yield strength of the aluminum alloy reaches 345MPa, the tensile strength is 382MPa, the hardness is 124HV, and the elongation is 10.0%. Patent document CN119843121a discloses a high-strength 6-series aluminum alloy comprising the following component ：Mg 1.0-1.5%,Si 0.85-1.5%,Cu 0.6-1.4%,Mn 0.4-1.2%,Cr 0.10-0.30%,Ti 0.01-0.03%,Zn 0.10-0.30%,Fe≤0.2%,, the balance being Al and unavoidable impurities. The high-strength 6-series aluminum alloy with the tensile strength of 450-510MPa, the yield strength of 415-470MPa, the elongation of more than or equal to 10 percent and good roll bending and welding formability is developed by adopting a forming mode of rolling, rolling and welding. However, these 6-series aluminum alloy materials have low extrusion speed, low extrusion efficiency and greatly increased production cost. Disclosure of Invention The invention provides a 6-series high-strength aluminum alloy material capable of being rapidly extruded, which has excellent formability, high extrusion speed and high extrusion efficiency while ensuring high strength, can greatly reduce production cost and is used for producing ultrathin-wall lightweight automobile parts. The aim of the invention is achieved by the following technical scheme: The invention relates to a 6-series high-strength aluminum alloy material capable of being rapidly extruded, which comprises the following element components in percentage by mass, wherein the balance of ：Si：0.1%～2.0%,Fe：≤0.5%,Cu：0.01%～1.5%,Mn：0.01%～1.5%,Mg：0.2%～2.0%,Cr：0.01%～0.5%,Ti：0.01%～0.3%,Zn：≤1.5%,Bi：0.1%～1.0%,Pb：0.1%～0.5%, is Al and unavoidable impurities. Preferably, the 6-series high-strength aluminum alloy material of the invention comprises ：Si：0.6%～1.0%,Fe：0.1%～0.3%,Cu：0.1%～0.5%,Mn：0.2%～0.6%,Mg：0.7%～1.5%,Cr：0.1%～0.2%,Ti：0.02%～0.1%,Zn：0～0.5%,Bi：0.1%～0.8%,Pb：0.1%～0.45%, mass percent of element components, and the balance of Al and unavoidable impurities. The invention relates to a casting and extrusion method of a 6-series high-strength aluminum alloy material capable of being rapidly extruded, which comprises the following steps: (1) Smelting the raw materials except magnesium and titanium in a smelting furnace at 700-800 ℃ for 3-5 hours, adding the magnesium raw material, stirring, and smelting for 20-50 minutes; (2) Argon is filled, a refining agent is added, degassing and deslagging are carried out, refining is carried out for 10-20 min, and then standing is carried out for 10-20 min; (3) Feeding aluminum titanium boron on line for casting, and adding Ti element to obtain