C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 15/02 (2006.01) C21D 1/68 (2006.01) C21D 1/70 (2006.01)
Patent
CA 2046501
An anti-oxidation agent for preventing oxidation of a stainless steel strip during continuous annealing comprising a colloidal inorganic substance which can be crystallized at a temperature not higher than 1300°C at least one compound having a melting point not higher than 1300°C, selected from the group consisting of silicates, borates and phosphates, a dispersion agent, and the balance substantially water. The anti-oxidation agent is applied to the surface of the stainless steel strip. During the annealing, the anti-oxidation agent enhances the heat absorption so that the stainless steel strip temperature is elevated to the annealing temperature in a short time. The anti-oxidation agent on the strip surface forms a film of a fine structure which keeps the strip surface away from oxidizing components of the annealing atmosphere so as to suppress generation of oxide scale. The film is easily separated due to thermal contraction in the course of the cooling after the annealing.
Un agent anti-oxydation permettant de prévenir l'oxydation de bandes d'acier inoxydable lors du recuit en continu renferme une substance minérale colloïdale, qui peut être cristallisée à une température ne dépassant pas 1300 degrés C, au moins un composé possédant un point de fusion ne dépassant pas 1300 degrés C, choisi dans le groupe constitué de silicates, de borates et de phosphates, un agent de dispersion, et de l'eau pour le reste. L'agent anti-oxydation est appliqué à la surface de la bande d'acier inoxydable. Pendant le recuit, l'agent anti-oxydation améliore l'absorption de chaleur, ce qui fait grimper rapidement la température de la bande d'acier inoxydable à la température de recuit. L'agent anti-oxydation sur la surface de la bande forme une pellicule finement structurée, qui maintient la surface de la bande à l'écart des oxydants de l'atmosphère de recuit, empêchant ainsi la formation d'une couche d'oxyde. La pellicule est facilement séparée du fait de la contraction thermique au cours du refroidissement après le recuit.
Ishibashi Genichi
Kaito Hiroyuki
Katsuki Yasuhiro
Muraki Hisatomi
Sato Kuniaki
Kawasaki Steel Corporation
Moffat & Co.
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