Effect of Oxygen Concentration on Surface Hot Shortness of Steel Induced by Copper

Since the Cu content in steel causes hot shortness, it is important to understand the behavior of Cu during high-temperature oxidation in order to control the precipitated Cu. This study examined Cu distribution during the oxidation of steel. The oxidation tests revealed that precipitated Cu existin...

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Bibliographic Details
Published in:ISIJ International 2015/05/15, Vol.55(5), pp.1044-1047
Main Authors: Kondo, Yasumitsu, Tanei, Hiroshi
Format: Article
Language:English
Subjects:
concentration
copper
evaporation
FeO
hot shortness
oxygen
reheating
rolling
wustite
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Summary:Since the Cu content in steel causes hot shortness, it is important to understand the behavior of Cu during high-temperature oxidation in order to control the precipitated Cu. This study examined Cu distribution during the oxidation of steel. The oxidation tests revealed that precipitated Cu existing in the scale/steel interface was absorbed into the Fe3O4 layer or evaporated into the atmosphere as Cu. Then, a method proposed to suppress hot shortness was tested by oxidation-tensile tests at high temperature and the method was proven to be effective.
ISSN:0915-1559
1347-5460
DOI:10.2355/isijinternational.55.1044