US 2014/0212323 A1 · FIRST LAYER OR UPPER LAYER WELDING SECTION OF HIGH Cr STEEL TURBINE ROTOR, OVERLAY WELDING MATERIAL FOR WELDING SECTION, AND METHOD FOR MANUFACTURING OVERLAY WELDING SECTION

Abstract

The present invention relates to a multilayer overlay welding section in which a first layer of an overlay welding section to be formed on the bearing contact surface of a high Cr steel turbine rotor includes C: 0.05 to 0.2%, Si: 0.1 to 1.0%, Mn: 0.3 to 1.5%, Cr: 4.0 to 7.7%, and Mo: 0.5 to 1.5% with a remainder including Fe and unavoidable impurities, a multilayer overlay welding section in which, in addition to the above layer, an upper layer welding section includes C: 0.05 to 0.2%, Si: 0.1 to 1.0%, Mn: 0.3 to 2.5%, Cr: 1.0 to 4.0%, and Mo: 0.5 to 1.5%, and a welding material therefor and a process for producing the multilayer overlay welding section.

Claims19

Dependent claims

A first layer welding section of a high Cr steel turbine rotor, which is a first layer welding section among a multilayer overlay welding section formed on a bearing contact surface of the high Cr steel turbine rotor, the first layer welding section comprising, in terms of % by weight:

C:
0.05 to 0.2%,
Si:
0.1 to 1.0%,
Mn:
0.3 to 1.5%,
Cr:
4.0 to 7.7%, and
Mo:
0.5 to 1.5%,
with a remainder including Fe and unavoidable impurities, in which the unavoidable impurities contain P:
0.015% or less, S:
0.015% or less, Cu:
0.2% or less, V:
0.2% or less, Ni:
0.3% or less, Co:
1.5% or less, B:
0.005% or less, W:
1.5% or less, and Nb:
0.07% or less in terms of % by weight based on the first layer welding section.

17 more elements

Dependencies are inferred from the claim text.

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

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

Life of this patent

Abstract

Claims19