Zirconium-containing 3xxx aluminum alloy material with high strength and corrosion resistance for high-frequency welded pipe and preparation method of zirconium-containing 3xxx aluminum alloy material

Abstract

The invention discloses a zirconium-containing 3xxx aluminum alloy material for a high-strength corrosion-resistant high-frequency welded pipe and a preparation method of the zirconium-containing 3xxx aluminum alloy material, and belongs to the technical field of component design and heat treatment of high-strength corrosion-resistant aluminum alloys for agricultural machine high-frequency welded pipes. The material comprises Si, Fe, Cu, Mn, Mg, Zr, Ti, impurities and the balance Al. The method comprises the following steps: weighing the raw materials according to the proportion for semi-continuous casting to obtain a cast ingot; hot-rolling the cast ingot after hot-rolling preheating to obtain a thick alloy hot-rolled coil; annealing treatment is performed after cold rolling. The mechanical property of the 3xxx alloy is effectively improved, meanwhile, the traditional 3xxx alloy heating and rolling technological process is effectively shortened, the zirconium-containing 3xxx aluminum alloy material for the high-strength corrosion-resistant high-frequency welded pipe with room temperature and corrosion resistance is produced under the low-cost manufacturing technology, the tensile strength is 170-220 MPa, the yield strength is larger than or equal to 150 MPa, and the ductility is larger than or equal to 8%; the method is suitable for preparing radiator parts and high-frequency welded pipe parts of automobiles and agricultural machinery.

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