Copper strip cover-type furnace annealing technology

An annealing process and a bell-type furnace technology, which are applied in the field of copper strip bell-type furnace annealing process, can solve the problems of large consumption of shielding gas, increase production cost, and optimize the annealing quality of cold-rolled strips, so as to promote the uniformity of grains. The effect of growing, improving production efficiency, internal crystallization quality and crystallization degree

Inactive Publication Date: 2016-02-24
ANHUI CHUJIANG TECHCAL NEW MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process flow of the application is reasonable, which makes the annealing mechanical properties of the cold-rolled strip stable, but the application does not improve the filling method of the shielding gas, so that the consu

Method used

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  • Copper strip cover-type furnace annealing technology

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Effect test

Embodiment 1

[0039] like figure 1 As shown, a kind of copper strip bell furnace annealing process of the present embodiment comprises the following steps:

[0040] Step 1: sealing and locking of the bell-type furnace;

[0041] The bell-type furnace includes a hearth 1 and an inner cover 3. A fan 2 is arranged at the bottom of the hearth 1, and a support plate is arranged above the hearth 1. A through hole is opened on the support plate, and the blades of the fan 2 are located below the through hole; The copper strip 5 is placed on the support plate, and then the inner cover 3 is covered on the outside of the copper strip 5, and the flange body at the bottom of the inner cover 3 is locked with the stove base 1 to keep the sealing state in the inner cover 3; specifically The flange body at the bottom of the inner cover 3 and the hearth 1 are locked by a hydraulic cylinder 6, and there are eight hydraulic cylinders 6, which are evenly distributed around the hearth 1. The piston rod of the h...

Embodiment 2

[0057] Same as Example 1, the difference is that the heating time of the bell furnace in this example is 4.2h, the heating temperature is 430°C, and the flow rate of the protective gas (that is, the mixed gas of hydrogen and nitrogen) during the heating stage is 9Nm 3 / h; the holding time of the bell-type furnace is 5.2h, and the flow rate of the protective gas during the holding stage is 5.5Nm 3 / h; the air cooling time of the bell furnace cooling stage is 4.2h, the cooling temperature is 280°C, and the protective gas flow rate is 4.5Nm 3 / h, the water cooling time is 5h, the cooling temperature is 70°C, and the protective gas flow rate is 2.5Nm 3 / h.

Embodiment 3

[0059] Same as Example 1, the difference is that the heating time of the bell furnace in this example is 4.5h, the heating temperature is 450°C, and the flow rate of the protective gas (that is, the mixed gas of hydrogen and nitrogen) in the heating stage is 10Nm 3 / h; the holding time of the bell furnace is 5.5h, and the flow rate of the protective gas in the holding stage is 6Nm 3 / h; the air cooling time of the bell furnace cooling stage is 4.5h, the cooling temperature is 300°C, and the protective gas flow rate is 5Nm 3 / h, the water cooling time is 5.5h, the cooling temperature is 80°C, and the protective gas flow rate is 3Nm 3 / h.

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Abstract

The invention discloses a copper strip cover-type furnace annealing technology and belongs to the field of heat treatment of metal materials. The technology comprises the following steps: 1, sealing and locking a cover-type furnace; 2, filling the cover-type furnace with safe gas; 3, carrying out a heating stage of the cover-type furnace, wherein the heating time is 4-5 h so that the temperature in an inner cover reaches 420-450 DEG C, and protective gas is introduced continuously in the heating process; 4 carrying out a heat preservation stage of the cover-type furnace; 5, carrying out a cooling stage of the cover-type furnace, wherein air cooling is carried out before water cooling, and protective gas is introduced continuously in the air cooling and water cooling stages; 6, filling the cover-type furnace with safe gas; and 7, unlocking the cover-type furnace and taking out a product. Through the adoption of the technical scheme of the invention, an annealed copper strip with better surface quality and more stable properties can be obtained, and the consumption of the protective gas resource in the annealing process can be reduced so as to reduce the production cost and improve the productivity effect.

Description

technical field [0001] The invention relates to the technical field of heat treatment of metal materials, in particular to a copper strip bell furnace 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, Obtain the desired grain size and grain orientation. At present, annealing in a bell furnace is one of the commonly used methods in copper strip processing. [0003] Bell furnace annealing belongs to the bright annealing of copper strip after cold rolling. The annealing process must ensure that there is no adhesion between the layers of the copper strip during production and no oxidation on the surface. To achieve no decarburization...

Claims

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Application Information

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IPC IPC(8): C21D9/67C21D1/26
CPCC21D9/67C21D1/26
Inventor 孙红刚盛代华梅桂林周跃进甘培保
Owner ANHUI CHUJIANG TECHCAL NEW MATERIAL CO LTD
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