IRON-BASED MATERIAL AND SURFACE TREATMENT METHOD FOR IRON-BASED MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a surface treatment method for obtaining an alloy layer which has such a thin thickness as several hundreds μm or less from the surface, has a fine structure, and has the composition with improved uniformity.;SOLUTION: This surface treatment method includes: employing a steel sheet 5 formed from a Fe-C steel as an example of an iron-based material 5; forming a layer 4 on the surface, which is formed from a material for enhancing hardness and a material for enhancing a surface tension; and irradiating the layer 4 with an electron beam 3 which is emitted toward the layer 4 from an electron beam irradiation device provided on the upper part of the layer 4 so that the energy density on the surface of the layer 4 is approximately 1.0×10⁴ W/m² to 1.5×10⁵ W/m² and particularly 5×10⁴ W/m².;COPYRIGHT: (C)2010,JPO&INPIT