Patent ID: 8302305
Filing Date: 2012-11-06
Classification: B23K,B32B,C21D,C22C,F01L,Y10T

Abstract:
1. A method for manufacturing a cast iron member having a clad layer, comprising: a step of forming the clad layer by melting a cladding material by means of irradiation of a laser emitted from a laser irradiation device and by depositing the melted cladding material on a surface of a part of a cast iron material, wherein a main ingredient of the cladding material is a copper element, wherein the step of forming the clad layer is performed by using the cladding material so that when the clad layer is formed, a hardened layer having a thickness of 0.01 to 2.0 mm is formed on the surface of the cast iron material, and wherein the step of forming the clad layer comprises at least: a step of forming a first clad layer on the surface of the cast iron material in such a manner that its thickness range would be 0.1 to 1.0 mm; and a step of forming a second clad layer on the surface of the first clad layer in such a manner that its thickness range would be 1.0 to 19 times the thickness of the first clad layer, wherein, as a pretreatment to the step of forming the clad layer, graphite contained in a surface layer of the cast iron material is removed by irradiating the surface of the cast iron material with the laser in such a manner that the surface of the cast iron material does not melt.