Method of box-annealing steel sheet to minimize annealing...

Details Method of box-annealing steel sheet to minimize annealing... Method of box-annealing steel sheet to minimize annealing...

C - Chemistry, Metallurgy

25

F

204/86, 204/83.5

C25F 1/06 (2006.01) C21D 1/70 (2006.01) C21D 9/46 (2006.01)

Patent

CA 1198708

ABSTRACT In the box annealing of steel sheet, the tendency for adjacent wraps of the sheet to pressure weld (stick) is decreased or eliminated by passing the sheet, prior to annealing, through a rinse containing from 1,500 to 10,000 ppm of the magnesium or calcium salts of soluble carboxylic acids, preferably formates. Further benefits are realized if the sheet is electro-cleaned with a silicate or phosphate containing cleaning solution, and thereafter rinsed in the formate solution whereby the latter acts to fix the concentration of silicates or phosphates remaining on the surface of the sheet.

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