Influence of carbon content on microstructure and properties of a steel matrix cermet

Abstract

There is a marked correlation between the composition, microstructure and properties in TiCNbased cermets. In the case of using iron alloys as metallic matrix the carbon content is of particular significance, as not only influences the stoichiometry of ceramic phase but also induces phase transformations in the steel matrix. However, such influence has been less studied in steel matrix cermets than in conventional Ni or Co ones, so the aim of this work is to contribute to the study of the influence of carbon content on the microstructure and properties of a steel matrix cermet containing fixed quantities of alloying elements. Samples were prepared by powder metallurgy and characterized combining different techniques as Transmission Mössbauer spectroscopy (TMS), X Ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM), to explain differences found in hardness and toughness.

Cylindrical Shell Analysis of Reactor Pressure Vessel for Rde

“…Materials selected for upper cylindrical shell and lower cylindrical shell of the pressure vessel components are carbon steel SA516-70, according to section III of ASME standards for higher temperature services [16,17]. Table 2 shows the material specification including chemical composition and mechanical property requirements for carbon steel plates at design temperature of 371 C [1].…”

Carbon addition effects on microstructure and small-scale hardness for Ti(C,N)-FeNi cermets

“…Further information on the effect of carbon addition on the microstructural parameters of the studied materials may be found in Refs. [25,[30][31][32].…”

“…Since carbon addition is expected to promote hardening of the metallic binder, its influence is expected to be relatively higher in the grades containing a relatively higher amount of metallic phase. Nevertheless, changes in mechanical properties of the investigated samples should be described as the combined effect of carbon addition on both metallic binder hardening and effective amount of porosity [27,32].…”