The invention discloses a manufacture method of an aluminum
alloy sectional material for a building formwork and belongs to the technical field of aluminum
alloy sectional material manufacture. The objective of the invention is to solve the problems that the aluminum
alloy sectional material for the building formwork, produced by the existing technology, is low in tensile strength, low in specified non-proportional extension strength, low in percentage elongation after fracture and low in
corrosion performance. The method comprises the following steps of
smelting, standing,
casting,
cutting, annealing, heating, extruding,
quenching, aging and
coating. Parameters in the technical step process are strictly controlled, and the aluminum alloy sectional material is enabled to have bigger cross section and better comprehensive performance, so that the use requirements on the building formwork are met, and the manufacture cost is reduced. Besides, through optimizing alloy components, and after
extrusion, adopting an optimized aging technology and brushing a formwork protecting agent, the requirements of users on the comprehensive performance of the aluminum alloy sectional material are met, and the prepared aluminum alloy sectional material has the advantages of being high in strength, low in inclusion content, high in surface quality and outstanding in comprehensive
mechanical property. The manufacture method is used for preparing the aluminum alloy sectional material for the building formwork.