FIRST LAYER OR OVERLAYING LAYER WELDING SECTION OF HIGH Cr STEEL TURBINE ROTOR, CLADDING WELDING MATERIAL FOR WELDING SECTION, AND METHOD FOR MANUFACTURING CLADDING WELDING SECTION

摘要

The present invention relates to a multilayered cladding welding section in which the first layer of the cladding welding section to be formed on a bearings contact surface of a high Cr steel turbine rotor contains 0.05-0.2% C, 0.1-1.0% Si, 0.3-1.5% Mn, 4.0-7.7% Cr, and 0.5-1.5% Mo, the remainder being Fe and unavoidable impurities; a multilayered cladding welding section in which the overlaying layer welding section contains 0.05-0.2% C, 0.1-1.0% Si, 0.3-2.5% Mn, 1.0-4.0% Cr, and 0.5-1.5% Mo; a welding material therefor; and a method for manufacturing a multilayered cladding welding section.