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A study on multiple microalloyed forging grade steels
Author(s) -
Shinde V.D.,
Chakrabarti A.K.,
Ray K.K.
Publication year - 2002
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.200200018
Subject(s) - metallurgy , forging , materials science , microstructure , rod , alloy , medicine , alternative medicine , pathology
Investigations were conducted for the development of multiple microalloyed air‐hardenable forging grade steels. A number of multiple microalloying combinations were tried for optimisation of the alloy design. In the initial laboratory investigations, the hot forged steels were austenitised at 1100 °C and then forced air‐draft cooled. A range of mechanical properties (Y.S: 350 to 1100 N/mm 2 , UTS: 500 – 1150 N/mm 2 , El.: 25 – 40%) would be developed primarily by varying the microalloying combinations and the carbon equivalent. Further industrial trial was conducted on forged steels. Connecting rods hot‐forged in successive stages after initial soaking at 1175 °C were forced air draft cooled and tempered at 500 °C. There was good correlation between the mechanical properties of the connecting rods and those of laboratory test specimens. An attempt has been made to characterise the microstructures of these steels by transmission electron microscopy.