Development of High Toughness Bainitic Microalloyed Forging Steel

Paper #:
  • 980883

Published:
  • 1998-02-01
Citation:
Nakamura, S., Inoue, K., and Hanyuda, T., "Development of High Toughness Bainitic Microalloyed Forging Steel," SAE Technical Paper 980883, 1998, https://doi.org/10.4271/980883.
Pages:
10
Abstract:
The influence of chemical compositions and forging conditions on mechanical properties of forged bainitic steels were studied. Manganese and chromium are useful to produce bainite structure while carbon and vanadium are good to control the mechanical properties of the steels. One of the compositions is 0.25 % C - 2.1 % Mn - 0.7 % Cr - 0.15 % V of which tensile strength is 1000 MPa and impact value (2 mm U type notched specimen) is 50 J/cm2 for 100 mm diameter bars. Bainitic steels have lower fatigue limit in the case of smooth specimen than ferrite-pearlite microalloyed steels but have higher fatigue limit in the case of notched specimen.
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