发明名称 |
PROCEDURE FOR PRODUCTION OF CARBON-FREE CAST HEAT-RESISTANT ALLOYS ON NICKEL BASE |
摘要 |
FIELD: metallurgy. ^ SUBSTANCE: procedure consists in melting charge materials in vacuum and in decarbonisation refining in two stages. At the first stage there is introduced oxidant in atmosphere of inert gas at pressure 20-150 mm of m. c. with successive withdrawal of inert gas. Upon removing inert gas carbon is additionally introduced into melt at amount of 0.001-0.010 % of charge materials weight at pressure of gas (1-10)ù10-2 mm m. c. At the second stage there are introduced rare earth metals amount of which 2.0-20.0 times exceeds amount of carbon left in melt upon the first stage of refining. Upon the second stage of refining chromium and active alloying elements are introduced into melt. ^ EFFECT: upgraded purity of carbon-free cast heat resistant alloys; increased operational properties of alloys and increased output of acceptable product at casting items with mono-crystal structure. ^ 2 tbl |
申请公布号 |
RU2426810(C1) |
申请公布日期 |
2011.08.20 |
申请号 |
RU20100134496 |
申请日期 |
2010.08.18 |
申请人 |
ROSSIJSKAJA FEDERATSIJA, OT IMENI KOTOROJ VYSTUPAET MINISTERSTVO PROMYSHLENNOSTI I TORGOVLI ROSSIJSKOJ FEDERATSII (MINPROMTORG ROSSII) |
发明人 |
SIDOROV VIKTOR VASIL'EVICH;RIGIN VADIM EVGEN'EVICH;PODKOPAEVA LIDIJA ALEKSANDROVNA;GORJUNOV ALEKSANDR VALER'EVICH |
分类号 |
C22C1/02;C22C19/03 |
主分类号 |
C22C1/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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