Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
Development of High Shape Factor Rolling Technology and Its Application to Manufacturing Thick Steel Plates with 50 kgf/mm2 Grade High Tensile Strength for Arctic Service
Ryota YAMABATakeshi TSUZUKIYukio TOMITANoboru OYAMAKametaro ITOH
Author information
JOURNALS FREE ACCESS

1987 Volume 73 Issue 14 Pages 1714-1721

Details
Abstract

Improvement of toughness at the mid-thickness of thick rolled steel plate (more than 50 mm) and manufacturing procedure for getting uniform properties over the whole thickness position were studied.
High shape factor rolling (large roll diameter and large reduction per pass) at non-recrystallization region brought about excellent toughness at the mid-thickness. We studied by simulation experiment and rigid plastic finite element method (FEM) analysis, and showed that high shape factor rolling increased rolling effect and resulted in fine ferrite grain size at the mid-thickness.
Excessive high shape factor rolling made recrystallization of austenite grain, and toughness deteriorated. Consequently, choice of appropriate rolling temperature and rolling pass schedule is important.
The thick steel plates with 50 kgf/mm2 grade high tensile strength made by applying high shape factor rolling technology have excellent toughness at base plate over the whole thickness position and at welded joints, and can be used for arctic service.

Information related to the author
© The Iron and Steel Institute of Japan
Previous article Next article
feedback
Top