Steel material includes layer formed by diffusion of nickel in hot-worked material containing non-metallic inclusions

摘要

A steel material has a layer of increased fatigue strength formed by diffusion of nickel in a surface of a hot worked material containing non-metallic inclusions. An Independent claim is also included for a process for manufacturing of a steel material by nickel-plating a surface of hot-worked steel material, and heating the plated material to diffuse the nickel.