Microalloyed Bar for Machine Structural Use
Abstract:
The effects of Nb and V and hot rolling on mechanical properties were studied in laboratory melted carbon steels(0.25-0.45%C). Adequately controlled rolled Nb bearing steel showed a good combination of strength and toughness, whereas in the condition of conventional rolling or hot forging V bearing steel was more favorable resulting in moderately good toughness. Further improvement of toughness was attempted in V bearing steel by addition of Ti as an austenitic grain refining element. Utilizing these results, successful mill trials were made for the product ion of high strength controlled rolled Nb bearing rod and of V bearing rod for hot forging. In these products, final or intermediate heat treatment(QT) could be completely eliminated.
Author:
Tetsuya Sampel, Takashl Abe, Hlrotada OSUZU, lsao Kozasu
Affiiation
Technical Research Center, Nippon Kokan K. K., Kawasaki, 210, Japan
PDF:
Source:
Vanadium Structural Steels - Reprint of papers on vanadium steel from the proceedings of “ASM HSLA Steels Technology and Applications Conference, Philadelphia, USA, Oct., 1983, pp.181-188
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