Copper-based alloy
A copper-based alloy, high-quality technology, applied in the field of copper-based alloys, can solve the problems of adding Ni, etc., and achieve the effect of excellent stress corrosion cracking resistance
Active Publication Date: 2016-01-20
SAN ETSU METALS
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AI Technical Summary
Problems solved by technology
[0011] However, Ni is an environmentally hazardous substance, and it is estimated that it will be added to the water quality standards recently, so it is not preferable to add Ni to castings used for faucets and valves.
Method used
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Effect test
Embodiment 1
[0068] As a test piece, the figure 1 , figure 2 Molten metals with various alloy compositions as shown are adjusted, cast at about 1000°C and cooled (solidified) at image 3 In the JISH5120A test piece (sand mold) as shown, the frame was unframed and a sample was collected.
[0069] In addition, there are No. A, No. B, etc. among the casting molds constituting the test piece, but this time it was confirmed by the No. A test piece.
[0070] The remainder of the table, Zn, also contains unavoidable impurities.
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Provided is a copper-based alloy comprising a brass alloy having excellent dezincification properties, etc., without thermal treatment, as a result of a copper-based alloy characterized by comprising, in % by mass: 63.5%-69.0% Cu; 1.2%-2.0% Sn; <=0.15% Fe; 0.1%-2.0% Pb or 0.5%-1.5% Bi; 0.01%-0.2% Al; 0.06%-0.15% Sb; and a P component being any added component in the range of 0.04%-0.15% when Cu is 63.5%-65.0% and <=0.15% when Cu is 65.0%-69.0%; with the remainder being Zn and unavoidable impurities.
Description
technical field [0001] The present invention relates to a copper-based alloy, in particular to a brass alloy, which is suitable for faucets, valves and other parts in contact with water, and has excellent dezincification resistance, erosion corrosion resistance, stress corrosion cracking resistance and the like. Background technique [0002] Among copper-based alloys, although bronze alloys are excellent in dezincification resistance, erosion corrosion resistance, and stress corrosion cracking resistance when left as they are after casting, they are more expensive than brass alloys. Alloys of brass alloys are in increasing demand. [0003] Patent Document 1 discloses a copper alloy as an alloy excellent in corrosion resistance. The copper alloy contains at least 0.05 to 0.2% by weight in a copper alloy composed of two phases of α phase and β phase Any one or two or more of Sn, 0.05-0.3% by weight of Sb, As or P, the maximum erosion depth is less than 200 μm (JBMA test), and...
Claims
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IPC IPC(8): C22C9/04
CPCC22C9/04
Inventor 上坂美治上野伸也
Owner SAN ETSU METALS