Production method of aluminum alloy plate for coal gondola car

Abstract

The invention discloses a production method of an aluminum alloy plate for a coal gondola car. The production method comprises the steps of: (1) burdening: the aluminum alloy plate comprises the following components in percentage by weight: not more than 0.2% of Si, not more than 0.3% of Fe, not more than 0.1% of Cu, not more than 0.8% and not less than 0.6% of Mn, not more than 4.8% and not less than 4.5% of Mg, not more than 0.2% and not less than 0.15% of Cr, not more than 0.1% and not less than 0.05% of Zn, not more than 0.15% and not less than 0.1% of Ti, not more than 0.15% and not less than 0.1% of Sc, not more than 0.15% and not less than 0.1% of Zr, and the balance of Al; (2) smelting; (3) refining; (4) crystal grain refinement; (5) degassing; (6) filtering; (7) casting; (8) sawing; (9) surface milling; (10) uniform heating; (11) hot rolling; (12) straightening of a cut plate at a transverse sheared edge; and (13) checking. A trace of a rare earth element scandium and a transitional element zirconium are newly added, so that the alloy strength is improved; the thickness of a finished product is directly rolled through hot rolling; compared with a traditional production method, the production method, provided by the invention, reduces four procedures, and is high in production efficiency; and the thickness of the finished product is directly rolled through hot rolling, so that the quality defect of panel butter spots in a traditional method is prevented.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy materials, and in particular relates to a short-process manufacturing method of a 5083H321 state aluminum alloy plate with a thickness of 6-8 mm for a coal-carrying gondola car. Background technique [0002] At present, the production process of 5083H321 state aluminum alloy sheet for coal transport gondola is: batching, smelting, refining, grain refinement, degassing, filtering, casting, sawing, milling, homogenization heating, hot rolling, pre-annealing , cold rolling, surface degreasing, stabilizing annealing, cross-cut edge straightening and cutting, inspection. The disadvantage is that it has many processes, long production process, low production efficiency, and the coil after cold rolling is too thick to pass through the cleaning machine. It can only be purged by the surface of the cold rolling mill to treat the oil on the surface of the plate, resulting in There are occasional ...

AI Technical Summary

Problems solved by technology

The disadvantage is that it has many processes, long production process, low production efficiency, and the coil after cold rolling is too thick to pass through the cleaning machine. It can only be purged by the surface of the cold rolling mill to treat the oil on the surface of the plate, resulting in There are occasional butter spots on the noodles, the surface quality is unstable, and the finished product is low

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