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Lead-free free-machining berylliumbronze

A free-cutting, beryllium-bronze technology applied in the field of improvement of beryllium-bronze alloys to achieve good mechanical properties, uniform turning chips, and improved ductility

Active Publication Date: 2009-10-28
SHENYANG JINKE COLORED PRODS RES
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Lead-free free-machining berylliumbronze
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  • Lead-free free-machining berylliumbronze

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Embodiment Construction

[0020] 0.05-0.5% magnesium and 0.02-0.2% aluminum can also be added to the beryllium bronze of the present invention, which can further improve the performance of the beryllium bronze.

[0021] Magnesium reduces the solubility of beryllium in solid copper alloys, adding 0.05 to 0.5% magnesium and 0.02 to 0.2% aluminum to high beryllium copper alloys, and low melting point crystal Cu appears on the alloy grain boundaries 2 Mg+Cu, its melting point is 730°C. The material is easy to crack during thermal processing, but magnesium and calcium are easily combined to form compounds to increase the melting point of low-melting crystals, avoiding thermal cracking. A small amount of magnesium can not only refine the particles, but also make γ 2 The fine and uniform distribution of phase particles improves the mechanical properties and stability of the material. A small amount of aluminum can increase the mechanical properties of beryllium copper alloy, and the combination of aluminum ...

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Abstract

The lead-free free-cutting beryllium bronze relates to an improvement of a lead-containing free-cutting beryllium bronze alloy. The present invention provides a lead-free free-cutting beryllium bronze that still maintains the excellent properties of lead-containing beryllium bronze. It is characterized in that the present invention comprises the following components, and each component is 1.8-2.0% by weight: beryllium is 1.8-2.0%, nickel is 0.2-0.5%, bismuth is 0.1-1.1%, calcium is 0.1-1.1%, and the rest is copper .

Description

Technical field: [0001] The invention relates to an improvement of a lead-containing free-cutting beryllium bronze alloy. Background technique: [0002] Beryllium bronze is divided into leaded beryllium bronze and lead-free beryllium bronze. [0003] Leaded beryllium bronze (for example, produced in the United States, model C17300) has high strength, high hardness, high elasticity and good electrical conductivity, thermal conductivity, corrosion resistance, and non-magnetic cutting performance. It is known as the king of copper alloys; it can meet the requirements of equipment Manufacturing industry, children's toy molds, sanitary ware molds, military industry, and electronic information industry; therefore, lead-containing free-cutting beryllium bronze is recognized as an important basic material in the world and is widely used. However, lead is an element harmful to the environment and the human body. In recent years, medical experts from various countries in the world ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00
Inventor 石路刘永涛王成
Owner SHENYANG JINKE COLORED PRODS RES