Turbine rotor and manufacturing method of turbine rotor
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United States of America Patent
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Aug 18, 2015
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N/A
app pub date -
Jul 15, 2009
filing date -
Oct 8, 2008
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Abstract
A turbine rotor has suitable strength and toughness without causing soaring manufacturing costs and prolonged manufacturing time. The turbine rotor is constructed by welding a rotor member for high temperature made of high Cr steel to a rotor member for low temperature made of low Cr steel. The high temperature rotor member is formed from high Cr steel of which the nitrogen content is 0.02% or higher by mass %. A filler material welds the high temperature rotor member and the low temperature rotor member together, and is a 9% Cr-based filler material of which the nitrogen content is 0.025% or lower by mass %.
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