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Application of thermomechanical treatment on medium‐carbon microalloyed steels continuously cooled from forging temperature
Author(s) -
Kaspar Radko,
GonzálezBaquet Ignacio,
Schreiber Nadja,
Richter Johannes,
Nußbaum Georg,
Köthe Alfred
Publication year - 1997
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199701773
Subject(s) - forging , materials science , vanadium , metallurgy , microalloyed steel , tempering , toughness , ultimate tensile strength , deformation (meteorology) , thermomechanical processing , titanium , carbon fibers , drop (telecommunication) , composite material , alloy , microstructure , mechanical engineering , engineering , austenite , composite number
In the high‐production‐drop‐forging of parts for automobile and truck engines the classical quench and tempering (QT) of low‐alloyed steels is nowadays ‐ in a lot of plants in Europe ‐ substituted by direct continuous cooling (CC) of microalloyed steels without the necessity of additional heat treatment and expensive straightening as well as stress relieving cycles. Nevertheless, there are some limitations on strength and toughness achievable by this technique. On two commercial medium‐carbon (0.3%C) steels microalloyed with vanadium or vanadium and titanium, modified deformation parameters were applied. The mechanical properties, determined by the tensile test, can be improved by decreasing the deformation temperature. Nevertheless, the values of yield strength (resp. 0.2%‐proof stress) as well as reduction of area remain inferior to those after QT of the same steels.