Structure of the carbonitride case on gray cast iron after low-temperature cyaniding

Abstract

1. Increasing the silicon content of Fe−C alloys reduces the thickness of the carbonitride case obtained in low-temperature liquid cyaniding, the phase composition remaining unchanged. 2. The formation of pores in the carbonitride layer at graphite platelets is due to impaired diffusion conditions in the pores surrounding graphite and to the evolution of adsorbed gases.