A1-mg-si extrusion alloy and method

Details A1-mg-si extrusion alloy and method A1-mg-si extrusion alloy and method

C - Chemistry, Metallurgy

22

F

148/11, 75/84

C22F 1/05 (2006.01) C22C 21/08 (2006.01)

Patent

CA 1292134

ABSTRACT Al-Mg-Si Extrusion Alloy and Method An extrusion ingot of an Al-Mg-Si alloy, has substantially all the Mg present in the form of particles having an average diameter of at least 0.1 microns of beta'-phase Mg2Si in the substantial absence of beta-phase Mg2Si. The ingot may be made by casting an ingot of the alloy, homogenising the ingot, cooling the homogenised ingot to a holding temperature of 250°C to 425°C at a cooling rate of at least 400°C/h, holding the ingot for 0.25 to 3 hours, and cooling. The ingot has improved extrusion properties.

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