Process of aluminization of sheets of magnetic steel with orient

Details Process of aluminization of sheets of magnetic steel with orient Process of aluminization of sheets of magnetic steel with orient

1991-01-28

1992-06-23

Wyszomerski, George

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148112, 148113, H01F 4122, C21D 812

Patent

active

051239760

ABSTRACT:
A process of aluminizing magnetic steel sheets is disclosed. The process involves annealing a steel sheet in order to achieve partial secondary recrystallization, providing aluminum on the steel sheet, preferably by vacuum evaporation or immersion, and subjecting the steel sheet to a further heat treating step in order to diffuse the aluminum into the sheet and decrease impurities therein. Preferably, the partial secondary recrystallization anneal is performed in a neutral atmosphere such as nitrogen, while the final heat treating step is performed in a hydrogen atmosphere, and at a higher temperature than the above annealing step.

REFERENCES:
patent: 3756867 (1973-09-01), Brissonneau et al.
patent: 3764381 (1973-10-01), Brissonneau
patent: 4177092 (1979-12-01), Thursby
patent: 4225366 (1980-09-01), Harase et al.
patent: 5013374 (1991-05-01), Block et al.

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