Al-Mg-Si alloy for forging and preparation method of Al-Mg-Si alloy

Abstract

The invention belongs to the field of wrought aluminum alloy material preparation, and particularly relates to an Al-Mg-Si alloy for forging and a preparation method of the Al-Mg-Si alloy. The component of the Al-Mg-Si alloy contains the following elements of, in percentage by mass, 0.75-0.85 of silicon, less than or equal to 0.25 of iron, 0.06-0.1 of copper, 0.75-0.85 of magnesium, 0.6-0.64 of manganese, 0.01-0.03 of chromium, less than or equal to 0.05 of zinc, 0.01-0.03 of titanium, and the balance aluminum. According to the Al-Mg-Si alloy for forging and the preparation method of the Al-Mg-Si alloy, the extrusion performance is excellent, the extrusion resistance is small, and the service life of the mold is long; after extrusion, the T61 performance are as follows, the tensile strength is larger than or equal to 310 Mpa, the yield is larger than or equal to 250-300 Mpa, the elongation is larger than or equal to 17%, and the coarse grain layer is less than or equal to 1 mm, so thatsubsequent forging machining is facilitated; after forging, the T6 performance requirements are as follows, the tensile strength is larger than or equal to 390 Mpa, the yield is larger than or equalto 360 Mpa, and the elongation is larger than or equal to 6%; and the casting performance is excellent, the universality is high, and the process can be consistent with an existing 6082 smelting process.

Description

Technical field [0001] The invention belongs to the field of preparation of deformed aluminum alloy materials, and specifically relates to an Al-Mg-Si alloy for forging and a preparation method thereof. Background technique [0002] With the requirements for energy conservation, environmental protection, lightweight and high mobility of automobiles, lightweight automobiles have developed rapidly. Aluminum alloy has the characteristics of moderate strength, light weight, and easy forming, which is suitable for lightweight design of automobiles. For the consideration of strong plasticity and safety, the automobile chassis connecting rod needs to use 6082 aluminum alloy to meet the following performance requirements: T61 performance requirements before forging: tensile ≥310Mpa, yield ≥250-300Mpa, elongation ≥17%, Coarse grain layer ≤1mm; T6 performance requirements after forging: tensile ≥390Mpa, yield ≥360Mpa, elongation ≥6%. At present, ordinary 6082 alloys cannot meet the above...

AI Technical Summary

Problems solved by technology

At present, ordinary 6082 alloys cannot meet the above requirements, and new Al-Mg-Si alloys need to be invented to meet the above applications

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