Effect of Normalization Heat Treatment on Creep and Tensile Properties of Modified 9Cr–1Mo Steel

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• 作者：S. Panneer Selvi ; T. Sakthivel…
• 关键词：Grade 91 ferritic steel ; Heat treatment ; Creep ; Tensile
• 刊名：Transactions of the Indian Institute of Metals
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：69
• 期：2
• 页码：261-269
• 全文大小：4,199 KB
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• 作者单位：S. Panneer Selvi (1)
  T. Sakthivel (1)
  P. Parameswaran (1)
  K. Laha (1)
  
  1. Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603 102, India
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Materials Science
  Metallic Materials
  Materials Science, general
  Tribology, Corrosion and Coatings
  
• 出版者：Springer India
• ISSN：0975-1645

文摘

Creep and tensile properties have been investigated on modified 9Cr–1Mo steel subjected to single and double normalization heat treatments. Optical, scanning and transmission electron microscopic investigations revealed the presence of finer prior austenite grain size and coarsening of MX precipitates in the double normalized steel as compared to the steel subjected to single normalization heat treatment. Increased minimum creep rate and significant reduction in creep rupture life were observed in the double normalized steel. Increased tensile ductility coupled with marginal decrease in tensile strength was observed with double normalized steel compared to single normalized steel. The double normalized steel exhibited lower creep strength and higher tensile ductility than the single normalized steel. Keywords Grade 91 ferritic steel Heat treatment Creep Tensile