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Novel lead-free environment-friendly high-strength wear-resistant copper-base alloy bar and preparation method thereof

An alloy rod and high-strength technology is applied in the field of preparation of lead-free, environmentally friendly, high-strength, wear-resistant copper-based new alloy rods and alloy rods. It can solve the problems of poor machinability, hot embrittlement, and lead environmental hazards, and achieve machinability Excellent, avoiding environmental pollution, and beneficial to environmental protection

Inactive Publication Date: 2012-12-19
SUZHOU TIANJIAN METAL 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 processing, so it can only be processed in a cold state, resulting in poor machinability, and lead has great harm to the environment, which does not meet the current requirements. People have higher and higher requirements for environmental protection

Method used

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  • Novel lead-free environment-friendly high-strength wear-resistant copper-base alloy bar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A new lead-free, environmentally friendly, high-strength, wear-resistant copper-based alloy rod, which is composed of the following components in weight percentage: manganese 1%-3%, tin 2%-4%, phosphorus 0.01%-0.5%, zinc 1.5%-4.5% %, the balance is copper. Its preparation method is as figure 1 As shown, specifically:

[0029] Step 1: Place electrolytic copper, manganese, phosphorus, tin, and zinc in a power frequency electric furnace according to the proportion, heat to 1230°C-1350°C to completely melt, and cool down to 1300°C.

[0030] Step 2 After fully stirring the completely melted alloy liquid with a special graphite tool, cover it with high-purity scaly graphite powder to prevent its oxidation, with a thickness of about 15-20 cm.

[0031] Step 3 After the holding time of 50 to 60 minutes, the composition of the sample taken out of the furnace is inspected three times with a direct-reading spectrometer imported from Germany to confirm that the alloy composition i...

Embodiment 2

[0037] A lead-free, environmentally friendly, high-strength, wear-resistant copper-based new alloy rod is composed of the following components in weight percentages: 1% manganese, 2% tin, 0.01% phosphorus, 1.5% zinc, and the balance is copper. Its preparation method is as figure 1 As shown, specifically:

[0038] Weigh each component according to the formula, put it in a power frequency electric furnace and melt it, (stir evenly with a special graphite rod) cover it with 15cm of high-purity scaly graphite powder to prevent oxidation, and keep it warm for about 50 minutes. Check whether the alloy composition is within the specified range. After the test is completed and qualified, continue to keep warm for about 30 minutes, then raise the temperature to 1350°C, turn on the vibration device, and cast a solid blank alloy bar by horizontal continuous casting method. The surface is processed to make the surface smooth, and then extruded by an extruder (the extrusion temperature is...

Embodiment 3

[0040] A lead-free, environmentally friendly, high-strength, wear-resistant copper-based new alloy rod is composed of the following components in weight percentage: 3% manganese, 4% tin, 0.5% phosphorus, 4.5% zinc, and the balance is copper. Its preparation method is as figure 1 As shown, specifically:

[0041] Weigh each component according to the formula, put it in a power frequency electric furnace and melt it, (stir evenly with a special graphite rod) cover it with 20cm of high-purity scaly graphite powder to prevent oxidation, and keep it warm for about 60 minutes. Check whether the alloy composition is within the specified range. After the test is completed and qualified, continue to keep warm for about 35 minutes, then raise the temperature to 1350°C, turn on the vibration device, and use the horizontal continuous casting method to cast a solid rough alloy bar. The surface is processed to make the surface smooth, and then extruded by an extruder (the extrusion temperat...

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Abstract

The invention relates to a novel lead-free environment-friendly high-strength wear-resistant copper-base alloy bar which is prepared from the following components in percentage by weight: 1-3% of manganese, 2-4% of tin, 0.01-0.5% of phosphorus, 1.5-4.5% of zinc and the balance of copper. The metallic element manganese is used instead of lead; the manganese, zinc, tin, phosphorus and copper are mixed proportionally, extruded by an extruding machine at proper temperature, and drawn by a drawing machine to obtain the alloy bar; the alloy bar has wear resistance in the traditional copper-lead-bronze alloy, can be used for hot working, and has better workability than the copper-lead-bronze alloy; the alloy bar provided by the invention is free of lead, thereby avoiding the environmental pollution caused by the use of lead and being beneficial to environmental protection; and thus, the novel lead-free environment-friendly high-strength wear-resistant copper-base alloy bar provided by the invention can completely substitute the traditional copper-lead-bronze alloy.

Description

technical field [0001] The invention relates to the field of alloy rod production, in particular to a new lead-free, environmentally friendly, high-strength, wear-resistant copper-based alloy rod with high wear resistance and good processability, and a preparation method of the alloy rod. Background technique [0002] Because of its high wear resistance and good machinability, leaded tin bronze is easy to weld and braze, and has good wear resistance in the atmosphere and fresh water. It is mainly used in the manufacture of aerospace, automotive and other industrial sectors. Friction parts and necessary welding, such as cylinder piston pin bushings, inner linings of bearings and bushings, connecting rod bushings, discs and washers, etc. However, due to the characteristics of lead, it is very easy to produce hot embrittlement during hot processing, so it can only be processed in a cold state, resulting in poor machinability, and lead has great harm to the environment, which do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/02C22C9/04C22C9/05C22F1/08
CPCC22C9/02C22C9/04C22C9/05C22F1/08
Inventor 陆海荣陈静
Owner SUZHOU TIANJIAN METAL NEW MATERIAL
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