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1. 发明授权

US10378366B2 Steam turbine rotor blade and method for manufacturing steam turbine rotor blade 有权
公开(公告)号：US10378366B2
公开(公告)日：2019-08-13
申请号：US15562912
申请日：2016-04-11
申请人： MITSUBISHI HITACHI POWER SYSTEMS, LTD.
发明人： Shinji Oikawa , Masahiko Arai , Hiroyuki Doi , Hideo Yoda
IPC分类号： F01D5/28 , F01D25/00 , B23K10/02 , B23K15/00 , B23K31/00 , C22C14/00 , C22F1/02 , C22F1/18 , B23K26/342 , B23K26/21 , B23K31/02 , B23K35/32 , F01D5/14 , C22C1/02 , B23K101/00 , B23K103/14 , C22F1/00
摘要： A steam turbine rotor blade achieving both abrasion resistance and reliability, and a method for manufacturing a steam turbine rotor blade capable of obtaining such a steam turbine rotor blade are provided. A steam turbine rotor blade according to the invention is characterized by including a blade base material and an erosion shield formed on a surface of the blade base material, wherein the blade base material is composed of a titanium alloy, and the erosion shield is composed of a weld overlay layer including a parent phase composed of pure titanium in which a metal element is solid-dissolved or a titanium alloy in which a metal element is solid-dissolved, and a hard phase dispersed in the parent phase.

2. 发明授权

US09784110B2 Steam turbine rotor 有权
公开(公告)号：US09784110B2
公开(公告)日：2017-10-10
申请号：US14453782
申请日：2014-08-07
申请人： Mitsubishi Hitachi Power Systems, Ltd.
发明人： Kunio Asai , Masahiko Arai , Kenichi Murata
IPC分类号： F01D5/06 , C22C38/08 , C22C38/18
CPC分类号： F01D5/063 , C22C38/001 , C22C38/08 , C22C38/18 , C22C38/44 , C22C38/46 , C22C38/48 , F05D2220/31 , F05D2230/235 , F05D2300/171 , F05D2300/175 , F05D2300/177
摘要： It is an objective of the invention to provide a steam turbine rotor that is capable of both reducing SCC susceptibility and improving LCF life thereof. There is provided a steam turbine rotor, comprising a rotor disk in a low pressure final stage L-0, and another rotor disk in a plurality of stages including a stage L-1 positioned closer to a high pressure side than the low pressure final stage L-0, the rotor disk in the low pressure final stage L-0 and the rotor disk in a plurality of stages including the stage L-1 being joined by welding, wherein a material of both the rotor disk in the low pressure final stage L-0 and the rotor disk in a plurality of stages including the stage L-1 is a 12Cr steel and has a tensile strength of 900 to 1200 MPa.

3. 发明授权

US09200524B2 Steam turbine rotor 有权
标题翻译：蒸汽轮机转子
公开(公告)号：US09200524B2
公开(公告)日：2015-12-01
申请号：US13777373
申请日：2013-02-26
申请人： Mitsubishi Hitachi Power Systems, Ltd.
发明人： Masahiko Arai , Hiroyuki Doi , Shinji Oikawa , Kenichi Murata
IPC分类号： F01D5/28
CPC分类号： F01D5/28 , F05D2220/31
摘要： There is provided a steam turbine rotor with high reliability and corresponding to increase in length of a high strength steel blade, in which only a low-pressure last stage is highly strengthened. The steam turbine rotor includes a steam turbine low-pressure last stage long blade made of a precipitation hardening type martensitic stainless steel containing, in mass, 0.1% or less of C, 0.1% or less of N, 9.0% to 14.0% inclusive of Cr, 9.0% to 14.0% inclusive of Ni, 0.5% to 2.5% inclusive of Mo, 0.5% or less of Si, 1.0% or less of Mn, 0.25% to 1.75% inclusive of Ti, 0.25% to 1.75% inclusive of Al, and the balance consisting of Fe and inevitable impurities, and a disk having a specific alloy composition is joined to a last stage section of the turbine rotor made of a low-alloy steel.
摘要翻译：提供了一种高可靠性的蒸汽轮机转子，对应于高强度钢叶片的长度增加，其中只有低压最后阶段被高度强化。蒸汽轮机转子包括由沉淀硬化型马氏体不锈钢制成的汽轮机低压末级长刀片，其质量为0.1％以下的C，0.1％以下的N，9.0％〜14.0％，包括 Cr，9.0〜14.0％的Ni，0.5〜2.5％的Mo，0.5％以下的Si，1.0％以下的Mn，0.25〜1.75％的Ti，0.25〜1.75％ Al，余量由Fe和不可避免的杂质构成，具有特定合金组成的盘与由低合金钢构成的涡轮转子的最后段连接。

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