Copper strip cover annealing technology

A hood annealing and copper strip technology, applied in the direction of manufacturing tools, furnace types, furnaces, etc., can solve the problems of cumbersome overall process, prolonged annealing time, long annealing cycle, etc., to simplify the process, improve production capacity, and shorten the annealing time. Effect

Inactive Publication Date: 2017-12-22
ZHONGTIAN ALLOY TECH
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Problems solved by technology

[0003] The annealing of the existing bell furnace adopts heat radiation and heat conduction to transfer heat from the outside to the inside. In order to avoid the influence of the performance of the copper strip caused by the large temperature difference between the inside and outside of the copper strip, the temperature in the furnace is usually raised slowly at a fixed heating rate. The temperature rises, which makes the annealing cycle very long. Generally, t

Method used

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Embodiment Construction

[0017] The technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments.

[0018] A kind of copper tape mask type annealing process disclosed by the present invention specifically comprises the following steps:

[0019] a. Stack the copper strip roll on the furnace base, and buckle the inner cover and use the hydraulic locking mechanism to seal and fix the inner cover and the base, and vacuum the furnace to eliminate the oxygen in the furnace to oxidize the copper strip, and then Fill the furnace with nitrogen until the pressure in the furnace is greater than the outdoor pressure of 101 MPa, continue to charge nitrogen and open the exhaust valve to discharge excess nitrogen to ensure that the furnace is in a positive pressure state of pure nitrogen and oxygen cannot enter;

[0020] b. Heating the inner cover through the heating cover, and heating the inner cover in sections through the heating cover, in wh...

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Abstract

A copper strip bell-type annealing process disclosed by the present invention comprises the following steps: a. put the copper strip roll into the annealing furnace to evacuate, and then fill it with nitrogen; b. carry out segmental heating to the inner cover through the heating mantle , where the first stage uses a heating rate of 120°C/h, heating until the temperature of the copper strip reaches 180°C, and the second stage uses a heating rate of 75°C/h to heat the copper strip temperature to 250°C; c, heat it to the annealing temperature and then keep it warm 5h; d. After the heat preservation is over, replace the heating cover with a cooling cover, and cool it to 74°C in the form of air cooling first and then water cooling. The fan speed in the air cooling stage is 1100r/min, and the furnace is continuously filled with nitrogen in the cooling stage. ; e. After cooling, open the inner cover for unloading. The invention simplifies the process steps, shortens the annealing time and improves the production capacity.

Description

technical field [0001] The invention relates to a copper strip cleaning process, in particular to a copper strip mask annealing process. Background technique [0002] The copper strip material needs to be annealed multiple times during the processing process, which mainly has two basic functions, one is to eliminate the hardening and residual stress generated during the processing, soften the material, improve the plasticity, and facilitate further processing; the other is to change the structure of the material, To obtain the required grain size and grain orientation, bell furnace annealing is currently one of the commonly used methods in copper strip processing. [0003] The annealing of the existing bell furnace adopts the method of heat radiation and heat conduction to transfer heat from the outside to the inside. In order to avoid the influence of the performance of the copper strip caused by the large temperature difference between the inside and outside of the copper ...

Claims

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Application Information

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IPC IPC(8): C21D1/26C21D1/74C21D9/52C22F1/08
CPCC21D1/26C21D1/74C21D9/52C22F1/08
Inventor 张利旭陈爱华王英华张达顾凯越
Owner ZHONGTIAN ALLOY TECH
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