| 摘要 |
PROBLEM TO BE SOLVED: To provide a designing method for a precipitation-strengthened high-strength steel sheet by which a steel designing is efficiently and theoretically performed when manufacturing the precipitation-strengthened high-strength steel sheet by adding carbide generating elements compositely, and to provide a manufacturing method for the precipitation-strengthened high-strength steel sheet, and the precipitation-strengthened high-strength steel sheet. SOLUTION: When designing the precipitation-strengthened high-strength steel sheet with carbide precipitated in a steel structure, one or two or more kinds of first metal elements M1 to generate MC-type carbide with the electronegativity of < 1.8 and one or two or more kinds of second metal elements M2 with the electronegativity of≥1.8 are selected as the metal elements to constitute carbide in a combination that the atomic radius difference between the first metal element M1 and the second metal element M2 is < 10%, and the quantity of addition of the first metal element M1, the second metal element M2 and C is determined so as to generate the carbide containing the first metal element M1 and the second metal element M2. COPYRIGHT: (C)2005,JPO&NCIPI
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