Stability of MC Carbide Particles Size in Creep Resisting Steels

Abstract

Theoretical analysis of the dependence microstructure creep rate. Discussion on the effects of carbide particles size and their distribution on the base of accelerated creep tests on a steel X20CrMoV121 tempered at 800 °C. Analysis of the stability of carbide particles size in terms of free energy of formation of the compound. Explanation of the different effect of VC and NbC particles on accelerated creep rate.

Keywords

• steel
• accelerated creep rate
• VC and NBc carbide particles
• size and stability
• ferrite matrix
• residual solubility of vanadium and niobium