High-strength copper alloy forging material
a high-strength, copper alloy technology, applied in the field of high-strength copper alloy forging materials, to achieve the effects of high hardness, high thermal conductivity, and high strength
Inactive Publication Date: 2013-12-05
JAPAN STEEL WORKS LTD
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- Abstract
- Description
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- Application Information
AI Technical Summary
Benefits of technology
The invention reduces the likelihood of cracks occurring in a material during working and heat treatment, resulting in a high-strength copper alloy with high hardness, strength, and thermal conductivity.
Problems solved by technology
However, the above-described Be copper has concerns about toxicity of dust generated at the time of melting or working thereof, so that replacements therefor have been demanded.
Furthermore, generally in the Cu alloys, cracks easily occur at the time of forging or heat treatment, so that there is also demanded improvement in ductility, in addition to hot workability.
Method used
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Experimental program
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Effect test
examples
[0039]Examples of the invention will be described below.
[0040]Raw materials were blended so as to give component compositions (including other unavoidable impurities) of Table 1, and melted in a vacuum induction melting furnace to prepare alloys of 100 mm (diameter)×200 mm (length). These alloys were subjected to hot forging using a hammer at 900° C. to form plate materials having a thickness of 25 mm. After maintaining at 970° C. for 4 hours, solution treatment by water cooling was performed. Thereafter, aging treatment suitable for materials of the respective compositions was performed at 400 to 500° C. for 1 to 30 hours to obtain sample materials.
TABLE 1Component (% by mass)AgingSample MaterialTotal of Cr,Ni / SiConditionsNo.CuNiSiZrPCrMnZnMn and ZnRatio(° C. × hr)Example1Balance4.160.950.090.018————4.38475° C. × 3 hr2Balance5.151.140.160.0174.52475° C. × 3 hr3Balance4.831.120.080.0040.430.190.330.954.31450° C. × 10 hr4Balance7.201.800.220.034————4.00450° C. × 10 hr5Balance3.700.92...
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Abstract
The present invention relates to a high-strength copper alloy forging material having properties of high hardness, high strength and high thermal conductivity.The high-strength copper alloy forging material contains, in mass %, 3 to 7.2% of Ni, 0.7 to 1.8% of Si, 0.02 to 0.35% of Zr and 0.002 to 0.05% of P, and further contains 1.5% or less of one or two or more of Cr, Mn and Zn in total, as needed, whereby appropriate amounts of Zr and P act to cause cracks to be less likely to occur in the material during working or heat treatment. After the working and the heat treatment, the forging material of the invention can have properties of high hardness, high strength and high thermal conductivity, and can be suitably used for resin injection mold materials, aircraft components and the like.
Description
TECHNICAL FIELD[0001]The present invention relates to a high-strength copper alloy forging material suitable for forged moldings and the like, including resin injection mold materials.BACKGROUND ART[0002]As alloys excellent in electrical conductivity and thermal conductivity, there have hitherto been used copper alloys such as brass (Cu—Zn-based), bronze (Cu—Sn-based), Be copper and Corson alloy (Cu—Ni—Si-based). In particular, Be copper, Corson alloy and the like have been used for resin injection mold materials, aircraft components and the like requiring strength and hardness, together with thermal conductivity. However, the above-described Be copper has concerns about toxicity of dust generated at the time of melting or working thereof, so that replacements therefor have been demanded. Further, for the Corson alloy, higher thermal conductivity, higher strength and higher hardness have been demanded.[0003]Furthermore, generally in the Cu alloys, cracks easily occur at the time of ...
Claims
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IPC IPC(8): C22C9/06
CPCC22C9/06B21J1/003C22F1/08C22C1/02
Inventor MIYABE, YOSHIHARUMIZUSAWA, MAMORUTANAKA, SHINJI
Owner JAPAN STEEL WORKS LTD