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公开(公告)号:US4917738A
公开(公告)日:1990-04-17
申请号:US201294
申请日:1988-05-31
申请人: Yusaku Takano , Akio Hizume , Yorimasa Takeda , Toshio Fujita , Shushi Kinoshita , Kikuo Morita , Masahiro Ikuta
发明人: Yusaku Takano , Akio Hizume , Yorimasa Takeda , Toshio Fujita , Shushi Kinoshita , Kikuo Morita , Masahiro Ikuta
IPC分类号: C21D8/00 , C21D9/28 , C22C38/00 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/32 , F01D5/02 , F01D5/28
摘要: The present invention is directed to a steam turbine rotor which comprises an iron base alloy containing 0.05 to 0.2 wt % of carbon, 0.1 wt % or less of silicon, 0.05 to 1.5 wt % of manganese, more than 8.0 wt % to less than 13 wt % of chromium, less than 1.5 wt % of nickel, 0.1 to 0.3 wt % of vanadium, 0.01 to 0.1 wt % of niobium, 0.01 to 0.1 wt % of nitrogen, 0.02 wt % or less of aluminum, less than 0.50 wt % of molybdenum and 0.9 to 3.0 wt % of tungsten; contents of molybdenum Mo and tungsten W satisfying the following formulae0.75.ltoreq.1/2W+Mo and3.ltoreq.W/Mo;a .delta.-ferrite phase and a large grain boundry carbide being scarcely contained basically in the metallic structure; a matrix of martensite being formed therein.
摘要翻译: 本发明涉及一种蒸汽轮机转子,其包括含有0.05至0.2重量%的碳,0.1重量%或更少的硅,0.05至1.5重量%的锰,大于8.0重量%至小于13的铁基合金 铬的重量%,镍的1.5重量%,钒0.1〜0.3重量%,铌0.01〜0.1重量%,氮0.01〜0.1重量%,铝0.02重量%以下,小于0.50重量% 的钼和0.9〜3.0重量%的钨; 钼Mo和钨W的含量满足下列公式0.75 1 / 2W + Mo和3 W / Mo; 基本上在金属结构中几乎不含有δ-铁素体相和大晶粒边界碳化物; 形成马氏体的基体。