METHOD FOR PRODUCING JOURNAL PART OF 9 TO 12

摘要

In a journal part of a 9 to 12 wt% Cr steel turbine rotor, a groove face is formed, and on the groove face, a lower build -up layer is formed by using a first welding material containing C: 0.10 to 0.25 wt%, Si: 0.20 to 0.80 wt%, Mn: 1.0 to 2.5 wt%, Ni: 0.4 to 1.0 wt%, Cr: 1.0 to 3.0 wt%, Mo: 0.2 to 1.5 wt%, V: 0.03 to 0.10 wt%, and a remainder composed of Fe and inevitable impurities, and further on this lower build-up layer, an upper build-up layer is formed using a second welding material containing C: 0.10 to 0.25 wt%, Si: 0.20 to 0.80 wt%, Mn: 1.0 to 2.5 wt%, Ni: 0.4 to 1.0 wt%, Cr: 1.0 to 3.0 wt%, Mo: 0.2 to 1.5 wt%, and a remainder consisting of Fe and inevitable impurities.