STEEL FOR ENAMELING AND ITS PRODUCING METHOD - SUMITOMO METAL INDUSTRIES,LTD.

Title:

STEEL FOR ENAMELING AND ITS PRODUCING METHOD

Document Type and Number:

Japanese Patent JP3770038

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To provide steel for enameling by which the reduction of surface blemishes and the prevention of fishscale defects can be simultaneously achieved. SOLUTION: (1) This high oxygen extra low carbon steel contains fundamentally, by mass, ≤30 ppm C, 70 to 10,000 ppm Mn and 400 to 900 ppm O and further contains at least one kind of elements selected from 3 to 40 ppm Al, 20 to 240 ppm Si and Ca and/or Mg of 1 to 25 ppm in total. (2) The ratio of the Mn (mass ppm) to the O (mass ppm) after vacuum decarburizing the treatment (Mn/O) is controlled to 2 to 19, and then the concentration of at least one kind of element among 3 to 40 ppm Al, 20 to 240 ppm Si and Ca and/or Mg of 1 to 25 ppm contained in total concentration is adjzasted. (3) a solid electrolytic oxygen sensor is used for the measurement of the O concentration in the molten steel performed at the time of the vacuum decarburizing treatment and the sensor has no coating over the sensing part.

Inventors:

Mitsuhiro Numata
Takashi Kimura
Naohiro Sato
Yoshihiko Higuchi

Application Number:

JP2000084219A

Publication Date:

April 26, 2006

Filing Date:

March 24, 2000

Export Citation:

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