Manufacturing process of 5086 aluminum alloy flat ingot

Abstract

The invention discloses a manufacturing technology of 5086 aluminum alloy slab ingots, and relates to an aluminum alloy casting technology. The manufacturing technology includes the steps of preparing raw materials; smelting the raw materials, wherein the melt temperature is 700-750 DEG C, the converter temperature is 730+ / -5 DEG C, the refining temperature is 710-740 DEG C and the refining gas is N2-Cl2-CO mixed gas; carrying out standing for 20-30 minutes after refining and carrying out on-line degassing on melt through the SNIF method, wherein the pressure of argon gas is 0.35 MPa and the purity of the argon gas is higher than 99.99%; and discharging molten aluminum alloy into a distributing launder and guiding the molten aluminum alloy into a large-specification full-aluminum automatic oil lubrication crystallizer for casting, wherein the casting temperature is 695-700 DEG C. According to the manufacturing technology, the high-quality aluminum alloy slab ingots can be provided for producing high-performance aluminum rolling products, and therefore the problems that existing 5086 aluminum alloy plate rolling is low in production efficiency and low in rate of finished products can be solved.

Description

technical field

[0001] The invention relates to the technical field of aluminum alloy manufacturing, in particular to the manufacturing process of 5086 aluminum alloy flat ingot. Background technique

[0002] 5086 aluminum alloy is a high-magnesium alloy with good strength, corrosion resistance and machinability among non-heat-treatable alloys. The surface is beautiful after anodizing. Arc welding performance is good. The main alloying element in 5086 alloy is magnesium, which has good corrosion resistance and weldability, as well as medium strength. Excellent corrosion resistance makes 5086 alloy widely used in marine applications such as ships, automobiles, aircraft welding parts, subway light rail, pressure vessels that require strict fire protection (such as liquid tank cars, refrigerated vehicles, refrigerated containers), refrigeration devices, TV towers, Drilling equipment, transportation equipment, missile parts, armor, etc. 5086 rolled product is a product with ...