发明申请
- 专利标题： Ni-BASED SINGLE CRYSTAL SUPERALLOY AND COMPONENT OBTAINED FROM THE SAME
- 专利标题（中）： 镍基单晶超级合金及其成分
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申请号： US13000815申请日： 2009-06-26
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公开(公告)号： US20110142714A1公开(公告)日： 2011-06-16
- 发明人: Hiroshi Harada , Yutaka Koizumi , Toshiharu Kobayashi , Tadaharu Yokokawa , Masao Sakamoto , Kyoko Kawagishi , Tomonori Kitashima , An-chou Yeh
- 申请人： Hiroshi Harada , Yutaka Koizumi , Toshiharu Kobayashi , Tadaharu Yokokawa , Masao Sakamoto , Kyoko Kawagishi , Tomonori Kitashima , An-chou Yeh
- 专利权人： National Institute for Materials Science
- 当前专利权人： National Institute for Materials Science
- 优先权： JP2008-167439 20080626; JP2008-168488 20080627
- 国际申请： PCT/JP2009/061764 WO 20090626
- 主分类号： C22C19/05
- IPC分类号： C22C19/05 ; C22C30/00
摘要：
Provided is an Ni-based single crystal superalloy wherein the ingredients have a composition containing, as ratio by mass, from 5.0% by mass to 7.0% by mass of Al, from 4.0% by mass to 8.0% by mass of Ta, from 0% by mass to 2.0% by mass of Mo, from 3.0% by mass to 8.0% by mass of W, from 3.0% by mass to 8.0% by mass of Re, from 0% by mass to 0.50% by mass of Hf, from 3.0% by mass to 7.0% by mass of Cr, from 0% by mass to 9.9% by mass of Co and from 1.0% by mass to 10.0% by mass of Ru, with the balance of Ni and inevitable impurities. The alloy prevents TCP phase precipitation at high temperatures, therefore having improved strength at high temperatures and having oxidation resistance at high temperatures.The above-mentioned first-generation alloy CMSX-2 and second-generation alloy CMSX-4 are, though comparable thereto in point of creep strength at low temperatures, inferior to third-generation alloys in point of creep strength at high temperatures, since a large quantity of eutectic γ′-phase remains therein even after high-temperature solution treatment.
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