Formation of Mn-depleted zone in Ti-containing weld metals

被引：31

作者：

Seo, Kangmyung ^{[1
]}

Kim, Young-min ^{[2
]}

Evans, G. M.

Kim, Hee Jin ^{[2
]}

Lee, Changhee ^{[3
]}

机构：

[1] Hanyang Univ, Dept Adv Mat & Chem Engn, Seoul 133791, South Korea

[2] Korea Inst Ind Technol, Adv Welding & Joining R&BD Grp, Inchon 406840, South Korea

[3] Hanyang Univ, Div Mat Sci & Engn, Seoul 133791, South Korea

来源：

WELDING IN THE WORLD | 2015年 / 59卷 / 03期

关键词：

Weld metal; Inclusions; Ti additions; Ferrite; Manganese; LOW-CARBON STEEL; ACICULAR FERRITE; INTRAGRANULAR NUCLEATION; NONMETALLIC INCLUSIONS; MICROSTRUCTURE; TITANIUM; BAINITE;

D O I：

10.1007/s40194-014-0207-y

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Characteristics of non-metallic inclusions are studied using three shielded metal arc (SMA) weld metals which differ greatly in Ti content and are correlated with the acicular ferrite contents measured in the as-deposited weld microstructure. Correlation is found between the inclusion phases present and the amount of acicular ferrite formed in each weld. In the 5 ppm Ti weld, the weld microstructure is extremely low in acicular ferrite content and this microstructure can be correlated with the amorphous Mn-silicate phase that formed abundantly in the inclusions of this weld. At 410 and 580 ppm Ti, the weld microstructure contains very high amount of acicular ferrite, and this microstructure can be explained by the presence of a Mn-depleted zone (MDZ), likely formed associating with the formation of inclusions dominant with Ti2O3 and MnTiO3. The possible mechanisms for MDZ formation are discussed.

引用

页码：373 / 380

页数：8

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