The development of Ti-alloyed high strength microalloy steel

Microalloy steels are generally Nb, V, or Nb, V, Ti composite microalloyed. Because of the high price of niobium and vanadium, the development of titanium microalloyed steels is a very interesting subject. In this study, steels with different Ti contents were refined and forged. Tensile tests were c...

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Published inMaterials in engineering Vol. 31; no. 6; pp. 2891 - 2896
Main Authors Xu, Guang, Gan, Xiaolong, Ma, Guojun, Luo, Feng, Zou, Hang
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.06.2010
Subjects
A. Ferrous metals and alloys
E. Mechanical
F. Microstructure
Nanostructure
Niobium
Precipitates
Precipitation
Steels
Strength
Tensile tests
Ti-alloyed
Titanium
E. Mechanical
Precipitates
A. Ferrous metals and alloys
F. Microstructure
Ti-alloyed
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Summary:Microalloy steels are generally Nb, V, or Nb, V, Ti composite microalloyed. Because of the high price of niobium and vanadium, the development of titanium microalloyed steels is a very interesting subject. In this study, steels with different Ti contents were refined and forged. Tensile tests were conducted and microstructures of samples were analyzed. Fine precipitates were observed using a transmission electron microscope. The results show that nanoscale Ti precipitates is the main factor enhancing strength of steels. The strength of steels increases with the Ti content. The optimum content range of titanium is between 0.04 and 0.10 wt.% while below 0.04 wt.% and higher than 0.10 wt.%, Ti has little effect on the strength of steels.
Bibliography:ObjectType-Article-2
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ISSN:0261-3069
DOI:10.1016/j.matdes.2009.12.032