A steam turbine rotor shaft made of precipitation-hardened forged austenite steel, comprising first, second and succeeding layers of build-up welding provided on an outer surface of a bearing portion of a journal section in the rotor shaft, the first layer being provided by use of a welding rod of N
A steam turbine rotor shaft made of precipitation-hardened forged austenite steel, comprising first, second and succeeding layers of build-up welding provided on an outer surface of a bearing portion of a journal section in the rotor shaft, the first layer being provided by use of a welding rod of Ni base alloy, the second and succeeding layers being provided by use of a welding rod of low alloy steel which layers have better bearing characteristics than those of the austenite steel.
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A steam turbine rotor shaft comprising a shaft formed of forged and precipitation-hardened austenite steel consisting essentially, by weight, of 0.01-0.10% C, not more than 1.0% Si, not more than 2.0% Mn, 12-16% Cr, 24-27% Ni, 0.5-1.5% Mo, 1-2.5% Ti, 0.2-0.4% Al, 0.1-0.4% V and the balance substanti
A steam turbine rotor shaft comprising a shaft formed of forged and precipitation-hardened austenite steel consisting essentially, by weight, of 0.01-0.10% C, not more than 1.0% Si, not more than 2.0% Mn, 12-16% Cr, 24-27% Ni, 0.5-1.5% Mo, 1-2.5% Ti, 0.2-0.4% Al, 0.1-0.4% V and the balance substantially Fe, said austenite steel having as a whole austenite structure having a g0.01-0.1% C, 0.5-3.5% Mn, 0.2-1.0% Si, 0.2-1.0% Cu, 60-75% Ni, 0.2-1.0% Al, 1.5-3.0% Ti, 10-20% Cr, 0.5-1.5% Nb and the balance substantially Fe, while a second layer and succeeding layers are formed by use of welding rods of low alloy steel consisting essentially, by weight, of not more than 0.1% C, not more than 1.0% Si, not more than 2.0% Mn, 0.3-3.0% Cr, nor more than 2.0% Mo and the balance substantially Fe such that a surface of said metal member to be in contact with a bearing is formed of low alloy steel containing Cr of 0.3-3.0 weight percent.
Smith, Michael P.; Stanley, Janet; Murphy, David S.; Baumgarten, Robert W.; DeMichael, Thomas; Mayers, Stephen L., Integrally bladed rotor airfoil fabrication and repair techniques.
Smith, Michael P.; Stanley, Janet; Murphy, David S.; Baumgarten, Robert W.; DeMichael, Thomas; Mayers, Stephen L., Integrally bladed rotor airfoil fabrication and repair techniques.
Clark Robert E. (Orlando FL) Novak Robert L. (Winter Springs FL) Amos Dennis R. (Rock Hill SC), Method of making a high temperature - low temperature rotor for turbines.
Amos Dennis R. (Rock Hill SC) Clark Robert E. (Orlando FL) Heinig Roger W. (Cocoa Beach FL) Reid Stephen R. (Newark DE), Method of modifying turbine rotor discs.
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