ALUMINUM ALLOY FORGED MATERIAL FOR AUTOMOBILE AND METHOD FOR MANUFACTURING THE SAME

摘要

The aluminum alloy forged material for an automobile according to the present invention is composed of an aluminum alloy including Si: 0.7-1.5 mass %, Fe: 0.5 mass % or less, Cu: 0.1-0.6 mass %, Mg: 0.6-1.2 mass %, Ti: 0.01-0.1 mass % and Mn: 0.25-1.0 mass %, further including at least one element selected from Cr: 0.1-0.4 mass % and Zr: 0.01-0.2 mass %, restricting Zn: 0.05 mass % or less, and a hydrogen amount: 0.25 ml/100 g-Al or less, with the remainder being Al and inevitable impurities, wherein the aluminum alloy forged material has an area ratio the <111> texture of 60% or more in a cross section parallel to the extrusion direction.

主权项

1. An aluminum alloy forged material, manufactured by a process comprising an extrusion step and a forging step, comprising:
Si: 0.7-1.5 mass %; Fe: 0.5 mass % or less; Cu: 0.1-0.6 mass %; Mg: 0.6-1.2 mass %; Ti: 0.01-0.1 mass % and Mn: 0.25-1.0 mass %; further comprising at least one element selected from Cr: 0.1-0.4 mass % and Zr: 0.01-0.2 mass %; restricting Zn: 0.05 mass % or less; and a hydrogen amount: 0.25 ml/100 g-Al or less; the remainder being Al and inevitable impurities, wherein the area ratio of the <111> texture is 60% or more in a cross section parallel to the extrusion direction, the tensile strength is 400 MPa or more, and the elongation is 10.0% or more.