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Effect of carbon content in CrMoV hot working tool steel
Author(s) -
Berns Hans,
Wendl Franz
Publication year - 1986
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.198600848
Subject(s) - materials science , ductility (earth science) , eutectic system , metallurgy , creep , carbide , toughness , carbon fibers , alloy , ultimate tensile strength , fatigue limit , composite material , composite number
The aim of this work was to find out whether a reduction of carbon content would reduce the amount of segregated eutectic carbides and improve ductility and toughness. Quenched and temperted specimens of steel X 40 CrMoV 5 1 (∼AISI H 13) were tested at carbon contents of 0.42 and 0.27%. Tensile and short time creep tests were carried out at elevated temperatures. Toughness was derived from unnotched, notched and precracked specimens over a temperature range. Stable fatigue crack growth was measured in CT specimens at room temperature and in thermal fatigue specimens. As expected, ductility and toughness are raised by reducing the carbon content. At the same time a favourable improvement of hot strength and creep resistance appears, causing a lower thermal fatigue crack velocity. These beneficial effects are due to the higher alloy content in solution after hardening. It is proposed to test a steel X 28 CrMoV 5 1 for intricate tools in practical application and learn more about its wear behaviour.