Title:
LEAD-FREE FREE-CUTTING COPPER ALLOY MATERIAL
Document Type and Number:
Japanese Patent JP3485502
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To secure machinability, cold workability and strength approximately equal to those of the existing material and to improve its castability and corrosion resistance without contg. an environmentally harmful Pb by specifying the chemical compsn. of a copper alloy material composed of Cu, Bi, Fe, Sn, P and Zn.
SOLUTION: This lead-free free-cutting copper alloy material has a compsn. composed of, by weight, 57.0 to 64.0%, desirably, about 59.0 to 64.0%, particularly, about 59.0 to 61.0% Cu, 0.5 to 4.0%, desirably, about 2.45 to 3.90%, particularly, about 2.45 to 3.15% Bi and one or more kinds of elements among 0.01 to 0.50%, desirably, about 0.05 to 0.40%, particularly, about 0.20 to 0.30% Fe, 0.2 to 2.0%, desirably, about 0.30 to 1.85%, particularly, about 0.30 to 1.9% Sn, 0.02 to 0.10%, desirably, about 0.035 to 0.08%, particularly, about 0.055 to 0.085% P, and the balance substantial Zn. Moreover, a prescribed amt. of Bi and prescribed amounts of one or more kinds among Fe, Sn and P are added to a 60/40 brass material.
Inventors:
Hirofumi Nagai
Shinichi Nishiyama
Hajime Sasaki
Shinichi Nishiyama
Hajime Sasaki
Application Number:
JP23723399A
Publication Date:
January 13, 2004
Filing Date:
August 24, 1999
Export Citation:
Assignee:
Hitachi Alloy Co., Ltd.
Hitachi Cable Ltd.
Hitachi Cable Ltd.
International Classes:
C22C9/04; (IPC1-7): C22C9/04
Domestic Patent References:
| JP54135618A | ||||
| JP4231431A | ||||
| JP5255778A | ||||
| JP7310133A | ||||
| JP6200340A |
Other References:
【文献】AMERICAN SOCIETY FOR TESTING MATERIALS,1999 ANNUALBOOK OF ASTM STANDARDS SECTION2,米国,VOLUME 02.01 COPPER AND COPPER ALLOYS,p.874、861、862
Attorney, Agent or Firm:
Nobuo Kinutani