Title:
快削性銅合金加工材、及び、快削性銅合金加工材の製造方法
Document Type and Number:
Japanese Patent JP6391204
Kind Code:
B2
Abstract:
This high-strength free-cutting copper alloy comprises 75.4-78.0% Cu, 3.05-3.55% Si, 0.05-0.13% P and 0.005-0.070% Pb, with the remainder comprising Zn and inevitable impurities, wherein the amount of Sn existing as inevitable impurities is at most 0.05%, the amount of Al is at most 0.05%, and the total amount of Sn and Al is at most 0.06%. The composition satisfies the following relations: 78.0≤f1=Cu+0.8×Si+P+Pb≤80.8; and 60.2≤f2=Cu-4.7×SiP+0.5×Pb≤61.5. The area percentage (%) of respective constituent phases satisfies the following relations: 29≤κ≤60; 0≤γ≤0.3; β=0; 0≤µ≤1.0; 98.6≤f3=α+κ; 99.7≤f4=α+κ+γ+µ; 0≤f5=γ+µ≤1.2; and 30≤f6=κ+6×γ1/2+0.5×µ≤62. The long side of the γ phase is at most 25 µm, the long side of the µ phase is at most 20 pm, and the κ phase is present within the α phase.
More Like This:
Inventors:
Keiichiro Oishi
Koichi Susaki
Shinji Tanaka
Yoshiyuki Goto
Koichi Susaki
Shinji Tanaka
Yoshiyuki Goto
Application Number:
JP2017567266A
Publication Date:
September 19, 2018
Filing Date:
August 15, 2017
Export Citation:
Assignee:
Mitsubishi Shindoh Co., Ltd.
International Classes:
C22C9/04; C22F1/08
Domestic Patent References:
| JP2013104071A | ||||
| JP2009509031A | ||||
| JP2000119774A | ||||
| JP2008516081A | ||||
| JP7508560A |
Foreign References:
| WO2018034281A1 | ||||
| WO2018034282A1 | ||||
| WO2018034283A1 | ||||
| WO2018034284A1 | ||||
| WO2015166998A1 | ||||
| WO2013065830A1 |
Attorney, Agent or Firm:
Yasushi Matsunuma
Mitsuo Teramoto
Fumihiro Hosokawa
Kazunori Onami
Mitsuo Teramoto
Fumihiro Hosokawa
Kazunori Onami