Title:
HIGH-STRENGTH HIGH-STIFFNESS STEEL AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
Japanese Patent JP3753101
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a high-strength high-stiffness steel which can be formed with hot working, has a Young's modulus of 240 GPa or higher, and is manufactured with a smelting method.
SOLUTION: The high-strength high-stiffness steel manufactured by casting of the molten steel has hexagonal borides and cubic carbonitrides with particle diameters of 20 μm or less, dispersed in a matrix of a Fe-based alloy at a volume fraction of 10-35% in total. It is further preferable that the hexagonal boride is one or more compounds of TiB2, VB2, NbB2 and a composite boride thereof, and that the cubic carbonitride is one or more compounds of Ti (C, N), V (C, N), Nb (C, N), Ta (C, N), Hf (C, N) and a composite carbonitride thereof.
Inventors:
Kaori Kono
Application Number:
JP2002194543A
Publication Date:
March 08, 2006
Filing Date:
July 03, 2002
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
C21D8/00; C22C38/00; B22D7/00; C22C38/14; (IPC1-7): C22C38/00; C21D8/00; C22C38/14
Domestic Patent References:
| JP2003105505A | ||||
| JP56023223A | ||||
| JP2003293094A | ||||
| JP2002105588A | ||||
| JP10068048A |
Attorney, Agent or Firm:
Mikiji Sugioka
Terutada Hogami
Michio Mori
Terutada Hogami
Michio Mori