Annealing treatment method of copper stranded wire

An annealing treatment and copper stranded wire technology, applied in heat treatment furnaces, heat treatment equipment, furnace types, etc., can solve the problems of easy oxidation, dirty copper wire surface, not bright, etc., and achieve the effect of not easy oxidation and bright surface

Inactive Publication Date: 2014-05-21
浙江正导光电股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above-mentioned annealing treatment method helps to eliminate the stress of the copper wire, it makes the surface of the copper wire relatively dull, not bright, and the surface of the copper wire is relatively dirty, and it is still prone to oxidation after a long time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: a kind of annealing treatment method of copper stranded wire, it comprises the following steps successively:

[0019] (1) Put the copper stranded wire into the annealing furnace, remove the air in the furnace to form a negative pressure to -0.4Mpa, and then fill it with protective gas carbon dioxide to form a positive pressure to 0.7Mpa;

[0020] (2) Heating under pressure, so that the temperature in the furnace reaches 250°C within 10 minutes, and keep the temperature and pressure for 1.5 hours;

[0021] (3) Stop heating and release the pressure to cool down, open the valve, discharge the gas, reduce the pressure to 0.5Mpa, and the temperature will also drop;

[0022] (4) Heating again, so that the temperature in the furnace reaches 200°C within 10 minutes, then turn off the heating equipment and keep it for 30 minutes;

[0023] (5) Open the furnace door and cool down to room temperature naturally.

Embodiment 2

[0024] Embodiment 2: a kind of annealing treatment method of copper stranded wire, it comprises the following steps successively:

[0025] (1) Put the copper stranded wire into the annealing furnace, remove the air in the furnace to form a negative pressure to -0.3Mpa, and then fill it with protective gas carbon dioxide to form a positive pressure to 0.8Mpa;

[0026] (2) Heating under pressure, so that the temperature in the furnace reaches 350°C within 15 minutes, and keep the temperature and pressure for 3 hours;

[0027] (3) Stop heating and release the pressure to cool down, open the valve, discharge the gas, reduce the pressure to 0.6Mpa, and the temperature will also drop;

[0028] (4) Heating again, so that the temperature in the furnace reaches 280°C within 15 minutes, then turn off the heating equipment and keep it for 1 hour;

[0029] (5) Open the furnace door and cool down to room temperature naturally.

Embodiment 3

[0030] Embodiment 3: a kind of annealing treatment method of copper stranded wire, it comprises the following steps successively:

[0031] (1) Put the copper stranded wire into the annealing furnace, remove the air in the furnace to form a negative pressure to -0.3Mpa, and then fill it with protective gas carbon dioxide to form a positive pressure to 0.7Mpa;

[0032] (2) Heating under pressure, so that the temperature in the furnace reaches 280 ° C within 12 minutes, and keep the temperature and pressure for 2 hours;

[0033] (3) Stop heating and release the pressure to cool down, open the valve, discharge the gas, reduce the pressure to 0.55Mpa, and the temperature will drop accordingly;

[0034] (4) Heating again, so that the temperature in the furnace reaches 250°C within 13 minutes, then turn off the heating equipment and keep it for 40 minutes;

[0035] (5) Open the furnace door and cool down to room temperature naturally.

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PUM

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Abstract

The invention relates to a production technique of a copper stranded wire, particularly an annealing treatment method of a copper stranded wire. The technical scheme is as follows: the annealing treatment method sequentially comprises the following steps: (1) putting a copper stranded wire into an annealing furnace, removing air in the furnace to form negative pressure, and charging protective gas carbon dioxide to form positive pressure; (2) heating under pressure; (3) stopping heating, relieving pressure and cooling; (4) reheating; and (5) opening the furnace door, and naturally cooling to room temperature. The method can effectively eliminate stress of the copper wire, enables the copper wire to have a bright and beautiful surface, and is beneficial to clearing pollutants on the surface of the copper wire, so that the copper wire can be stored for a long time or can not be easily oxidized when in use.

Description

technical field [0001] The invention relates to a copper stranded wire production process, in particular to an annealing treatment method for a copper stranded wire. Background technique [0002] During the processing of copper stranded wire, due to stretching, twisting and winding, etc., stress will be generated inside the copper wire, and it is easy to harden and oxidize. Therefore, annealing treatment is required. [0003] The current treatment method is often to use nitrogen as a protective gas to carry out annealing treatment in the annealing furnace; first extract air from the annealing furnace to form a negative pressure, then fill it with nitrogen, and form a certain pressure in the furnace, then heat it to about 300 ° C and keep it warm 1-2 hours, then turn on the furnace and let it cool naturally. [0004] Although the above-mentioned annealing treatment method helps to eliminate the stress of the copper wire, it makes the surface of the copper wire relatively du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/08C21D1/74C21D9/52
Inventor 罗英宝李源鸿李韦桦杨昆严炳发
Owner 浙江正导光电股份有限公司
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