Title:
STAINLESS STEEL FOR DISK BRAKE ROTOR
Document Type and Number:
Japanese Patent JP3491030
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide inexpensive steel for a disk brake rotor which has wide quenching heat treating conditions, and hardly causes deterioration in material caused by increase in temperature when used (in braking).
SOLUTION: For being used for a disk brake rotor, martensitic stainless steel is subjected to the control of componmential compositions so as to contain 0.04 to 0.10% C, ≤1.0% Si, 0.1 to 2.0% Mn, ≤0.04% P, ≤0.01% S, >11.5 to 13.5% Cr, ≤0.1% Al, ≤0.04% N, 0 to 1.0% Cu, 0 to 1.0% Ni, 0 to 0.03% Ti and, further, one or more kinds of Nb and V by specified amounts, and if required, to contain one or more kinds selected from Mo, B, Ca, Mg, La, Ce and Y and moreover to increase a GP value (calculated by a specified mathematical formula) expressing an austenitic ratio at high temperature.
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Inventors:
Shinji Tsuge
Takaaki Matsuda
Yasutaka Okada
Takeshi Sakashita
Daisuke Nago
Takaaki Matsuda
Yasutaka Okada
Takeshi Sakashita
Daisuke Nago
Application Number:
JP2000323320A
Publication Date:
January 26, 2004
Filing Date:
October 18, 2000
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
SHIMANO INC.
SHIMANO INC.
International Classes:
C21D6/00; C22C38/00; C22C38/24; C22C38/26; C22C38/42; C22C38/38; C22C38/46; C22C38/48; C22C38/58; F16D65/12; (IPC1-7): C22C38/00; C22C38/38; C22C38/58; F16D65/12
Domestic Patent References:
| JP5970748A | ||||
| JP2002146488A | ||||
| JP2002146489A |
Attorney, Agent or Firm:
Takeshi Imai