Cast rolling method for restraining center segregation of Cu element in high-alloy-content Al-Cu alloy through nano TiC particle adding

Abstract

The invention discloses a cast rolling method for restraining center segregation of a Cu element in a high-alloy-content Al-Cu alloy through nano TiC particle adding. The Al-Cu and TiC / Al-Cu alloy cast rolling method comprises the steps that firstly, Al-Cu alloy melt is prepared, and a nano TiC ceramic particle intermediate alloy is added; secondly, the prepared melt is subjected to double-rollercast rolling into an alloy sheet; and thirdly, T6 heat treatment is conducted on the Al-Cu and TiC / Al-Cu alloy sheet. Through comparison of the Al-Cu and TiC / Al-Cu alloy, grain refining is achieved byadding nano TiC particles, center segregation of the Cu element in the Al-Cu alloy prepared through double-roller cast rolling is obviously improved, and meanwhile strong plasticity of the double-roller cast-rolled Al-Cu alloy after T6 heat treatment is improved. By means of the cast rolling method, the important technology support can be provided for producing high-performance cast-rolling high-alloy-content panels.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy plate preparation, and more specifically, the invention relates to a casting and rolling method for suppressing central segregation of Cu elements in Al-Cu alloys with high alloy content by adding nanometer TiC particles. Background technique [0002] Traditional aluminum alloy sheet preparation requires many process steps, such as direct chill casting, homogenization, surface exfoliation, hot / cold rolling, and annealing to produce large slabs. Twin-roll casting and rolling technology can produce thin plate directly from molten metal, and only a small number of subsequent rolling and heat treatment processes can produce near-net shape products, thereby significantly reducing production costs and time. In recent years, the technology of twin-roll casting and rolling has attracted much attention due to its good economic benefits, low energy consumption and low pollution. However, despite dec...

AI Technical Summary

Problems solved by technology

[0004] At present, in industrial production, center segregation is generally controlled by adjusting casting parameters. However, for materials with different components, the optimal casting conditions are obtained in different ways, and it takes a lot of time to adjust and optimize

In recent years, some scholars have begun to introduce external physical fields into the casting and rolling process. The introduction of external physical fields can reduce the degree of center segregation to a certain extent, but this will make the casting and rolling process complicated and energy-consuming.

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