ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Regular Article
Characterization of Inclusions Formed in Ti-containing Steel Weld Metals
Kangmyung SeoYoung-Min KimHee Jin KimChanghee Lee
Author information
JOURNALS OPEN ACCESS FULL-TEXT HTML

2015 Volume 55 Issue 8 Pages 1730-1738

Details
Abstract

The influence of Ti addition on inclusion characteristics and their effects on the nucleation of acicular ferrite has been studied using as-deposited bainitic-type GMA weld metals prepared with oxygen content constant. TEM analysis was carried out to identify the inclusion phases and to investigate the local variation in chemical composition around the inclusions. It was found that the Ti-containing phase changes from (Mn,Ti)-spinel oxide to Ti2O3 at ~0.07 wt.% Ti while Mn-depleted zone (MDZ) starts to form at ~0.02 wt.% Ti. This indicates that MDZs are induced by the formation of Ti2O3 as well as a large amount of (Mn,Ti)-spinel oxide. Due to MDZ formation, acicular ferrite can nucleate to a great extent, even from the amorphous surface of the Mn-silicate phase in the 0.02% Ti weld.

Information related to the author
© 2015 by The Iron and Steel Institute of Japan
Previous article Next article
feedback
Top