A kind of high magnetostriction coefficient Fe-ga based thin strip and its preparation method

Abstract

The invention relates to a high magnetostriction coefficient Fe-Ga-based thin strip and a preparation method thereof. The invention adopts die casting, slab continuous casting, thin slab continuous casting and thin strip continuous casting slabs, and can carry out large-scale production simply and efficiently by using traditional rolling and annealing processes; establishes low-temperature inherent inhibitor + nitriding inhibition Agent system, control heat treatment and rolling process to precipitate fine Cu 2 S, Nb(C,N) and V(C,N) or their composite precipitates are used as the main intrinsic inhibitors. When the intrinsic inhibitory force is insufficient, nitriding is used to supplement the formation of nitrides such as AIN or BN before secondary recrystallization annealing. , to achieve flexible control of the suppression force; finely adjust the cold rolling parameters to ensure that the primary recrystallization obtains a fine and uniform structure and a favorable texture, and realize the coordination and matching of the structure, texture and inhibitor before the secondary recrystallization, and obtain a perfect and sharp Secondary recrystallization of Goss ({110}<001>) texture. The magnetostriction coefficient (3 / 2)λs of the finished Fe-Ga-based thin strip of the present invention is as high 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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