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Lead-free environmental-friendly copper-based alloy tube and manufacturing method thereof

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

Active Publication Date: 2014-02-19
SUZHOU JINCANG ALLOY NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the characteristics of lead, it is very easy to produce hot embrittlement during hot working, so it can only be cold worked, which reduces the workability of alloy pipes, 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 environmental-friendly copper-based alloy tube and manufacturing method thereof
  • Lead-free environmental-friendly copper-based alloy tube and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A new lead-free environment-friendly copper-based alloy material is composed of the following components in weight percentage: 4% zinc, 4% tin, 0.5% bismuth, 1% silicon carbide, and the balance is copper. Its manufacturing process is as figure 1 As shown, perform the following steps in sequence:

[0028] 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

[0030] A new lead-free environment-friendly copper-based alloy material is composed of the following components in weight percentage: 6% zinc, 6% tin, 1.5% bismuth, 3% silicon carbide, and the balance is copper. Its manufacturing process is as figure 1 As shown, perform the following steps in sequence:

[0031] 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. Bismuth wit...

Embodiment 3

[0033] A new lead-free environment-friendly copper-based alloy material is composed of the following components in weight percentage: 5% zinc, 5% tin, 1% bismuth, 2% silicon carbide, and the balance is copper. Its manufacturing process is as figure 1 As shown, perform the following steps in sequence:

[0034] 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 grea...

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Abstract

The invention provides a lead-free environmental-friendly copper-based alloy tube and a manufacturing method thereof. The lead-free environmental-friendly copper-based alloy tube provided by the invention consists of the following components by weight: 4-6 percent of zinc, 4-6 percent of tin, 0.5-1.5 percent of bismuth, 1-3 percent of silicon carbide and the balance of copper. In the alloy tube provided by the invention, the bismuth element is adopted to replace a lead element in a conventional copper alloy; a nanoscale silicon carbide material is added; by performance of expanding due to cold and contracting due to heat of bismuth and high toughness and high hardness of the nanoscale silicon carbide material, the lead-free environmental-friendly copper-based alloy tube which completely can replace a tin bronze material containing the lead element is produced. According to the invention, under the condition of not increasing cost, the requirement on environmental-friendly performance of the alloy is met, cutting performance and hardness of the alloy are also further improved, and the lead-free environmental-friendly copper-based alloy tube is suitable for a wear-resistant part at a high temperature (400 DEG C).

Description

technical field [0001] The invention relates to the field of alloy pipe production, in particular to a lead-free environment-friendly copper-based alloy pipe and a method for manufacturing the alloy pipe. 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, it is very easy to produce hot embrittlement during hot working, so it can only be cold worked, which reduces the workability of alloy pipes, 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 h...

Claims

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Application Information

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IPC IPC(8): C22C9/02C22C9/04C22C1/02B22D11/045
Inventor 陆海荣孙飞赵勇
Owner SUZHOU JINCANG ALLOY NEW MATERIAL
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