发明名称 |
Fremgangsmåde til fremstilling af en oxiddispersionsforstærket ferritisk-martensitisk legering |
摘要 |
Oxide dispersion strengthened ferritic or martensitic chromium steel production comprises austenitization of a martensitic structure and then slow cooling to transform austenite into ferrite. An oxide dispersion strengthened ferritic chromium steel is produced by subjecting a martensitic preform to austenitization at the Ac3 point or above and then slow cooling at a rate equal to or less than the critical austenite to ferrite transformation cooling rate which is determined from a continuous cooling phase transformation diagram. Independent claims are also included for the following: (i) production of an oxide dispersion strengthened martensitic chromium steel by subjecting the above produced steel to martensitic transformation and tempering; (ii) manufacture of a nuclear fuel cladding from an oxide dispersion strengthened ferritic chromium steel produced as described above; (iii) an oxide dispersion strengthened ferritic or martensitic chromium steel having an average grain size of greater than 1 mu m; (iv) a nuclear fuel cladding comprising the above steel; (v) a nuclear power reactor element which is resistant to neutron radiation and to temperatures of 400-700 degrees C and which comprises the above steel; and (vi) an element which is resistant to temperatures above 400 degrees C and which comprises the above steel. |
申请公布号 |
DK0949346(T3) |
申请公布日期 |
2004.11.08 |
申请号 |
DK19990400820T |
申请日期 |
1999.04.02 |
申请人 |
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发明人 |
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分类号 |
C21D1/78;C22C33/02;C22C38/22;G21C3/07;(IPC1-7):C22C33/02 |
主分类号 |
C21D1/78 |
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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