ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The demand to replace Fe-V steel with Fe-Nb steel is evolving because of high costs of rawvanadium material. For the mass production of Fe-Nb steel, the most critical barrier is a poor impacttoughness comparing with that of Fe-V steel. This study covers a microstructural investigation forferrite grain size to explain the strength and toughness results as a function of V and Nb contents. Thesteel samples were made of three different compositions, i.e., Fe-V steel (Fe-0.05V-0.001Nb),Fe-V-Nb steel (Fe-0.014V-0.03Nb), and Fe-Nb steel (Fe-0.003V-0.033Nb). Rolling temperature toinitiate was 1150°C for the all experiments. However, rolling temperature to finish was set differentlyfor two conditions; 950°C and 860°C. The rolling to 860°C decreased the grain size for the ferritephase and increased the impact toughness rather than the case of 950°C. The Fe-V-Nb steel exhibitedsimilar value of the impact toughness with that for the Fe-V steel because of the low rollingtemperature to finish, i.e., 860°C. The whole replace of V with Nb decreased the impact toughnesssignificantly, however some extent of V content remained with Nb content showed the comparabletoughness to the Fe-V steel by optimizing the controlled rolling process
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.26-28.55.pdf
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