ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Regular Article
Difference in the Role of Non-quench Aging on Mechanical Properties between Acicular Ferrite and Ferrite-Pearlite Pipeline Steels
Ming-Chun ZHAOToshihiro HANAMURAHai QIUKotobu NAGAIYi-Yin SHANKe YANG
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2005 Volume 45 Issue 1 Pages 116-120

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Abstract

Hot-rolled plates of both acicular ferrite (AF) and ferrite-pearlite (FP) pipeline steels were reheated at approximately 600°C, named as non-quench aging in this paper. The experimental result indicated that the non-quench aging caused different effects in mechanical properties for different microstructural types of pipeline steels. AF pipeline steels could be greatly strengthened by non-quench aging while FP pipeline steels could not be. Role of non-quench aging on mechanical properties between AF and FP pipeline steels was analyzed. Strengthening for AF pipeline steels by a subsequent simple non-quench aging without any other change in chemical composition, TMCP and rolling equipment, etc., provides a lower economical cost approach for the development of high strength pipeline steels.

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© 2005 by The Iron and Steel Institute of Japan
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