Laminage contrôlé de produits longs (barres et fils) en aciers micro-alliés

Rofes-Vernis, J.; Heritier, B; Maitrepierre, Ph.; Wyckaërt, A.

doi:10.1051/metal/198380110879

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“…5a) which means that free alloy carbides were predominately precipitated by HTMT. These results on the effect of HTMT on precipitation of carbide agree well with other studies [7][8][9]. On the basis of the tempering mechanism in steel [16,17], the effect of HTMT on the precipitation of carbide during tempering can be explained as follows.…”

Section: Microscopic Observationsupporting

confidence: 90%

Effect of high temperature thermomechanical treatment on the mechanical properties of vanadium – modified AISI 4330 steel

Lee¹,

Chun²

1981

J Mater Sci

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The relationships between the recovery and recrystallization of hot-deformed austenite grains and the precipitation of carbide on tempering in a 0.3C-Ni-Cr-Mo-V steel have been studied to examine closely the favourable effects of high-temperature thermomechanical treatment (HTMT) on the mechanical properties in steel. The results show that the strength and toughness increase with increasing degree of deformation by HTMT, particularly in which the ductile-brittle transition temperature as a measure of toughness decreases steeply with increasing degree of deformation. From the analysis of line broadening on (1 1 0)M and hardness change with holding time after hot deformation, the dynamic recovery and recrystallization during HTMT are believed not to occur. Owing to this, the random distribution of fine carbide precipitates in martensite structure is hardly affected. Consequently, the improvement of mechanical properties by HTMT is due to the distribution of fine carbide precipitates within martensite lath and the refinement of the martensite stru ctu re.

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Section: Microscopic Observationsupporting

confidence: 90%