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TIG welding or submerged arc multilayer buildup welds and its manufacturing method of the high Cr steel turbine rotor by welding
TIG welding or submerged arc multilayer buildup welds and its manufacturing method of the high Cr steel turbine rotor by welding
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机译:TIG焊或埋弧多层堆焊及其通过焊接制造高Cr钢涡轮转子的方法
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摘要
PROBLEM TO BE SOLVED: To avoid stress removal anneal cracking by improving strength and toughness of a welding section formed at a bearing contact surface of a high Cr turbine rotor.SOLUTION: A cladding first layer welding section of an overlay welding formed at a bearing contact surface contains by 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, with a remainder being Fe and unavoidable impurities being by 0.015% or less P, 0.015% or less S, 0.2% or less Cu, 0.2% or less V, 0.3% or less Ni, 1.5% or less Co, 0.005% or less B, 1.5% or less W, and 0.07% or less Nb. A build-up 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, with a remainder being Fe and unavoidable impurities being regulated to be 0.015% or less P, 0.015% or less S, 0.2% or less Cu, 0.15% or less V, 0.3% or less Ni, and 0.07% or less Nb.
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