High magnetostriction coefficient Fe-Ga based thin strip and preparation method thereof

Abstract

The invention relates to a high magnetostriction coefficient Fe-Ga based thin strip and a preparation method thereof. According to the high magnetostriction coefficient Fe-Ga based thin strip and thepreparation method thereof, slabs of die casting, slab continuous casting, thin slab continuous casting and thin strip continuous casting are adopted, and simple and efficient scale production can berealized by using traditional rolling and annealing processes; an inhibitor system of low temperature intrinsic inhibitors and nitriding is established, and heat treatment and the rolling process arecontrolled to precipitate fine Cu2S, Nb(C,N) and V(C,N) or composite precipitates thereof as main intrinsic inhibitors; when the intrinsic inhibition is insufficient, nitriding is used for supplementing and forming nitrides such as AIN or BN before the secondary recrystallization annealing to achieve flexible control of the inhibition; cold rolling parameters are fine controlled to ensure primaryrecrystallization to obtain fine and uniform organizations and favorable textures, the coordinated matching of the organizations, the textures and the inhibitors before secondary recrystallization isachieved, and perfect and sharp secondary recrystallization of texture Goss ({110}(001)) is obtained. The magnetostriction coefficient (3 / 2) lambda s of a Fe-Ga based thin strip finished product is ashigh as 220-370ppm.

Description

technical field [0001] The invention belongs to the technical field of magnetic materials, and in particular relates to a high magnetostriction coefficient Fe-Ga base thin strip and a preparation method thereof. Background technique [0002] Magnetostrictive materials refer to smart materials whose length changes under the action of a magnetic field to generate displacement and work, or repeatedly elongates and shortens under an alternating magnetic field to generate vibration or sound waves, thereby converting electromagnetic energy into mechanical energy or sound energy. It is widely used in high-tech fields such as sonar underwater acoustic transducers, electroacoustic transducers, marine exploration and development, micro-displacement drives, vibration reduction and anti-vibration, intelligent mechanisms and automation, and is an important energy and information conversion Material. [0003] Magnetostrictive materials mainly include rare earth giant magnetostrictive mat...

AI Technical Summary

Problems solved by technology

The introduction of surface segregation, on the one hand, increases the cost and requires high equipment precision. On the other hand, it must be annealed at 1200 ° C or higher to obtain perfect secondary recrystallization and eliminate the adverse effects of S elements on magnetic properties, resulting in serious Ga volatilization.

Although the Chinese patent CN 104711475A removes the dependence on surface segregation by adding 5% to 15% mol% Al and nitriding twice after hot rolling and cold rolling, but the higher Al content reduces the magnetostriction coefficient and the two Secondary nitriding process is complex

Another main reason for the low magnetostrictive performance in the above research is the low degree of secondary recrystallization orientation, and adjusting the coordination and matching between the structure, texture and inhibitor before secondary recrystallization is the key to improving the degree of secondary recrystallization orientation. The essential

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