Influence of cooling rate and tempering on precipitation and hardness of vanadium microalloyed steel

Clustering effect on high temperature tensile behaviour of vanadium microalloyed steel

“…While this work was in progress, details have been published of electron microscope studies of C-Mn-Al-V-N steel by Gündüz and Cochrane [13], samples austenitised for 26 h showed aluminium nitride particles, which were not observed in the samples austenitised for 1 h. Although, the finding that AlN is present after 26 h is consistent with other studies, see, for example, the dis- Fig. 3.…”

Influence of NbC Addition on the Sintering Behaviour of Medium Carbon PM Steels

“…Additional, strength is obtained by precipitation of carbonitride particles which may occur at different stage during the manufacture and fabrication process of microalloyed steels [2,3]. The microalloying precipitates also prevent grain growth of the steels.…”

Effects of Two Different Cyclic Heat Treatments on Microstructure and Mechanical Properties of Ti-V Microalloyed Steel

“…These precipitated particles are usually formed in three stages 12 : Type 1 in the liquid phase and during or after solidification, Type 2 in austenite after solution treatment and during hot deformation, and Type 3 during the austenite to ferrite transformation. According to the solubility diagram by Nagata et al 13 as well as the precipitation order of carbonitrides and the content of each element shown in Table 1, the major fraction of TiN precipitated in austenite, thus the other precipitates would also precipitate in solid.…”

“…According to the solubility diagram by Nagata et al 13 as well as the precipitation order of carbonitrides and the content of each element shown in Table 1, the major fraction of TiN precipitated in austenite, thus the other precipitates would also precipitate in solid. Therefore, in this work the precipitates formed in liquid (which not only have a minor fraction, but also are too stable and large to make effective pinning for grain boundaries and dislocations 12 ) weren't taken into consideration. According to the solubility products taken from the work of Narita et al [14][15][16] and the formula of effective Ti content, i.e.…”