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Lead-free copper alloy and a method of manufacture

A technology of copper alloy and alloy, which is applied in the direction of shafts and bearings, anti-centrifugal force rotating parts, bearings, etc., and can solve problems such as stress corrosion cracking

Inactive Publication Date: 2005-01-26
WIELAND WERKE AG
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

If the terminal post connections are made of conventional leaded brass, there is a large risk of stress corrosion cracking due to this stress

Method used

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  • Lead-free copper alloy and a method of manufacture

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Embodiment Construction

[0040] In a preferred embodiment, the copper alloy consists of 60 to 70% Cu, 0.5 to 3.5% Sn, 0.07 to 3% Mg and 0.003 to 0.01% P, with the balance being Zn and unavoidable impurities.

[0041] Alternatively in another preferred embodiment the copper alloy consists of 60 to 70% Cu, 0.5 to 3.5% Sn, 0.07 to 3% Mg and 0.03 to 0.1% P, the balance being Zn and unavoidable impurities .

[0042] Alternatively in another preferred embodiment the copper alloy consists of 60 to 70% Cu, 1.5 to 2.5% Sn, 0.07 to 3% Mg and 0.03 to 0.1% P, the balance being Zn and unavoidable impurities .

[0043] Alternatively in another preferred embodiment, the copper alloy consists of 60 to 70% Cu, 2.0 to 2.5% Sn, 0.07 to 3% Mg and 0.03 to 0.1% P, the balance being Zn and unavoidable impurities .

[0044] In all the preferred embodiments described above, phosphorus may be included in order to influence particularly advantageously the formation of the initial cast structure and the corrosion properties. W...

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Abstract

Copper alloy contains (in wt.%) 60-70 Cu, 0.5-3.5 Sn and further matrix-active elements, 0.01-0.5 Fe and / or Co, 0.01-0.5 Ni, 0.01-0.5 Mn and / or Si, up to 3 Mg, up to 0.2 P, up to 0.5 Ag, Al, As, Sb, Ti or Zr, and a balance of Zn and impurities.

Description

technical field [0001] The present invention relates to Cu-Zn-Sn based copper alloys and their use. Background technique [0002] Brass is used in various fields such as machine building, electrotechnical and public health engineering. [0003] In mechanical manufacturing and electrical engineering, due to the trend of miniaturization, structural parts are becoming smaller and finer. Also, components made of brass are often composited with other metallic and non-metallic materials. Both of these however create difficulties for recycling based on dismantled and / or melted material. [0004] Further difficulties arise especially when the structural parts to be reused contain elements or substances which are toxic or harmful to health. These elements or substances can directly endanger workers in the process of preparing or processing these materials. When such materials have to be stored for a long period of time and thus are exposed to climatic influences, the environmenta...

Claims

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Application Information

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IPC IPC(8): C22C9/02C22C9/04F16C33/12
CPCC22C9/04Y02T10/865F16C2204/14F16C2326/01F16C33/121
Inventor 乌韦·霍夫曼莫尼卡·布罗伊哈拉尔德·西格尔安德烈亚斯·伯格尔约尔格·西格
Owner WIELAND WERKE AG
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