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
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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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