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Patent Searching and Data


Title:
ROLLED H-BEAM STEEL AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2018/043491
Kind Code:
A1
Abstract:
This rolled H-beam is characterized in that: the average of the top 5% of the Mn concentrations in the most brittle zone of a flange is not more than 1.6 times the Mn concentration at a position that is located 1/6 in the width direction of the flange from a widthwise end face of the flange and 1/4 in the thickness direction of the flange from a face of the flange on the reverse side from a web; and the average of the top 5% of the Mn concentration in a center segregation zone that is distributed in a region extending 15 mm or more from the center of the flange width to one or both widthwise end faces of the flange and extending 2 mm or less in a surface layer of the flange in the thickness direction is 1.1 to 1.6 times the Mn concentration at the position that is located 1/6 in the width direction of the flange from the widthwise end face of the flange and 1/4 in the thickness direction of the flange from the face of the flange on the reverse side from the web.

Inventors:
ITO, Hidetoshi (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
YAMASHITA, Hiroshi (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
Application Number:
JP2017/030951
Publication Date:
March 08, 2018
Filing Date:
August 29, 2017
Export Citation:
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Assignee:
NIPPON STEEL & SUMITOMO METAL CORPORATION (6-1 Marunouchi 2-chome, Chiyoda-ku Tokyo, 71, 〒1008071, JP)
International Classes:
C22C38/00; B21B1/08; B21B1/088; C21D8/00; C22C38/60
Foreign References:
JPH0788502A1995-04-04
JPS58188501A1983-11-04
JP2012180584A2012-09-20
Attorney, Agent or Firm:
HAGIWARA, Yasushi et al. (Hazuki International Yotsuya, Daiichi Tomizawa Building 1-3, Yotsuya 3-chom, Shinjuku-ku Tokyo 04, 〒1600004, JP)
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