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Lead-free environment-friendly copper-based alloy bar and preparation method thereof

A technology of copper-based alloy and manufacturing method, applied in the manufacture of alloy rods, lead-free and environmentally friendly copper-based alloy rods, can solve the problems of reducing the machinability of alloy rods, lead hazards, etc.

Active Publication Date: 2014-02-05
SUZHOU JINCANG ALLOY NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the characteristics of lead, hot brittleness is very easy to occur during hot working, so only cold working can be carried out, which reduces the workability of alloy rods, and lead is very harmful to the environment. With the obvious improvement of environmental protection awareness , bronze alloys containing lead elements can no longer meet the requirements of high-end markets at home and abroad

Method used

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  • Lead-free environment-friendly copper-based alloy bar and preparation method thereof
  • Lead-free environment-friendly copper-based alloy bar and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A new lead-free environment-friendly copper-based alloy material is composed of the following components in weight percentage: 8% zinc, 9% tin, 1% bismuth, 0.5% silicon carbide, and the balance is copper. Its manufacturing process is as figure 1 As shown, perform the following steps in sequence:

[0029] Put copper, tin and zinc in the power frequency electric furnace according to the weight percentage ratio mentioned above, heat it to 1100°C and melt it completely, then keep it warm to 1000°C. After fully stirring the above-mentioned completely melted alloy liquid with a graphite rod, cover the alloy liquid with high-purity flaky graphite powder with a thickness of 6 cm and keep it warm. After holding at 1000°C for 1.2 hours, take the sample out of the electric furnace, and use a direct-reading spectrometer to test the composition of the sample three to five times. If the content of each component is within the specified range, it will be placed for use. Bismuth with...

Embodiment 2

[0031] A new lead-free and environmentally friendly copper-based alloy material is composed of the following components in weight percentage: 10% zinc, 11.5% tin, 2.5% bismuth, 1.5% silicon carbide, and the balance is copper. Its manufacturing process is as figure 1 As shown, perform the following steps in sequence:

[0032] Put copper, tin and zinc in the power frequency electric furnace according to the weight percentage ratio mentioned above, heat it to 1150°C and melt it completely, then keep it warm to 1000°C. After fully stirring the above-mentioned completely melted alloy liquid with a graphite rod, cover the alloy liquid with high-purity flaky graphite powder with a thickness of 10 cm and keep it warm. After holding at 1000°C for 1.5 hours, take the sample out of the electric furnace, and use a direct-reading spectrometer to test the composition of the sample three to five times. If the content of each component is within the specified range, it will be placed for use...

Embodiment 3

[0034] A new lead-free environment-friendly copper-based alloy material is composed of the following components in weight percentage: 9% zinc, 10.5% tin, 2% bismuth, 1% silicon carbide, and the balance is copper. Its manufacturing process is as figure 1 As shown, perform the following steps in sequence:

[0035]Put copper, tin and zinc in the power frequency electric furnace according to the above weight percentage distribution, heat to 1125°C and completely melt, then keep warm to 1000°C. After fully stirring the above-mentioned completely melted alloy liquid with a graphite rod, cover the alloy liquid with high-purity flaky graphite powder with a thickness of 8 cm and keep it warm. After holding at 1000°C for 1.3 hours, take the sample out of the electric furnace, and use a direct-reading spectrometer to test the composition of the sample three to five times. If the content of each component is within the specified range, it will be placed for use. Bismuth with a purity gr...

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Abstract

The invention provides a lead-free environment-friendly copper-based alloy bar and a preparation method thereof. The lead-free environment-friendly copper-based alloy bar comprises the following components in percentage by weight: 8%-10% of zinc, 9%-11.5% of tin, 1%-2.5% of bismuth, 0.5%-1.5% of silicon carbide and the balance of copper. According to the alloy bar, the bismuth element replaces the lead element in the traditional copper alloy, and a nanoscale silicon carbide material is added, and the material entirely capable of replacing tin bronze containing lead element can be produced through the cold contraction and heat expansion of bismuth and the high toughness and high hardness of the nanoscale silicon carbide material. Under the condition of not increasing the cost, the cutting performance and hardness of the alloy can be further improved while the environment-friendly performance requirement of the alloy can be met, and the lead-free environment-friendly copper-based alloy bar is suitable for wear-resistant parts under high-temperature (400 DEG C) situation.

Description

technical field [0001] The invention relates to the field of alloy rod production, in particular to a lead-free and environment-friendly copper-based alloy rod and a method for manufacturing the alloy rod. Background technique [0002] Existing tin bronze materials often add lead elements in order to achieve their chip-easy performance. Lead-containing tin bronze has high wear resistance and good machinability, and has good fiber welding and welding performance. It is mainly used for manufacturing aviation﹑ Parts subject to friction and necessary welding in the automotive and other industrial sectors. However, due to the characteristics of lead, hot brittleness is very easy to occur during hot working, so only cold working can be carried out, which reduces the workability of alloy rods, and lead is very harmful to the environment. With the obvious improvement of environmental protection awareness , Bronze alloys containing lead elements can no longer meet the requirements o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/04C22C9/02
Inventor 陆海荣孙飞赵勇
Owner SUZHOU JINCANG ALLOY NEW MATERIAL
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