COLD ROLLED STEEL SHEET HAVING EXCELLENT DEGREASABILITY

PURPOSE:To produce a cold rolled steel sheet which is subjected to water cooling or steam cooling at the time of continuous annealing and further to a pickling, is free from deterioration in chemical conversion treatability by a degreasing defect and has excellent degreasability to substantially pre...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	TANIMURA KOJI, TAIRA TAKETOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	PURPOSE:To produce a cold rolled steel sheet which is subjected to water cooling or steam cooling at the time of continuous annealing and further to a pickling, is free from deterioration in chemical conversion treatability by a degreasing defect and has excellent degreasability to substantially prevent the influence by a fluctuation of the degreasing liquid in a mass production line of chemical conversion treatment. CONSTITUTION:The cold rolled steel sheet is so formed that the steel sheet has a metallic Ni layer on its base iron side and an Ni hydroxide layer on the extreme surface layer and that the presence ratio of the Ni atoms in the extreme surface layer part is 75 to 95atm.% and the ratio of the Ni is in a range of 1 to 100mg/m in terms of the element weight. The steel plate obtd. in such a manner is hardly affected by the degradation in the degreasability by aging of a degreasing liquid in the degreasing stage of the manufacture's production line of chemical conversion treatment. The stable chemical treatability is thus obtd.