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Method for preparing high-electric-conductivity pure copper strips for transformer

A high-conductivity, transformer-based technology, applied in the field of preparation of high-conductivity pure copper strips for transformers, can solve the problems of harsh parameters of pure copper strips, achieve less intermediate annealing times, short production process, and save costs Effect

Inactive Publication Date: 2012-01-18
宁波市鄞州锡青铜带制品有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in special occasions, such as transformers, in order to meet their special functions, such as high power, high precision control and other requirements, the parameters of the pure copper strip, the main component of the transformer, have also become very stringent.

Method used

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  • Method for preparing high-electric-conductivity pure copper strips for transformer
  • Method for preparing high-electric-conductivity pure copper strips for transformer

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Experimental program
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Embodiment 1

[0018] Firstly, the proportioning raw materials are needed, because the present invention requires that the electrical conductivity of the final cost copper strip needs to be more than 98%, so impurity elements such as phosphorus and iron that can affect the conductivity of the pure copper strip need to be strictly controlled when proportioning the raw materials. In this embodiment, the copper content of the raw material is 99.9%, the phosphorus content is 0.003%, and the iron content is 0.005%.

[0019] After determining the ratio of raw materials, the raw materials are sent to the furnace for melting. The charge melting temperature is raised to 1150°C to 1300°C in the atmosphere. High-purity copper is easy to suck air into the raw material during the melting process, causing air bubbles to form inside the raw material, so it needs to be added to the middle of the alloy in the melted raw material. In this embodiment, copper-phosphorus master alloy (phosphorus: 8.0%; iron: 0....

Embodiment 2

[0024] Proportioning raw materials, in this embodiment, the copper content of the raw materials is 99.93%, the phosphorus content is 0.002%, and the iron content is 0.003%.

[0025] After determining the ratio of raw materials, the raw materials are sent to the furnace for melting. The furnace charge melting temperature is raised to 1200°C to 1300°C in the atmosphere. High-purity copper is easy to absorb air into the raw material during the melting process, causing air bubbles to form inside the raw material, so an intermediate alloy needs to be added to the melted raw material. In this embodiment, the master alloy is copper-phosphorus master alloy (phosphorus: 9.0%; iron: 0.15%; copper balance). The content of the copper-phosphorus master alloy is 0.01%. The copper-phosphorus master alloy is firstly heated to a molten state and then added to the liquid raw material.

[0026] Stir the liquid raw materials with wooden sticks or plastic rods, so that the copper-copper-phosphor...

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Abstract

The invention discloses a method for preparing high-electric-conductivity pure copper strips for a transformer, belonging to the field of material manufacturing, for solving problems of longer preparation process and expensive required devices of the high-electric-conductivity pure copper strips in the prior art. The preparation method of the high-electric-conductivity pure copper strips for the transformer comprises the following steps of: distributing materials, melting materials, adding a copper phosphor intermediate alloy, and covering dry charcoal on liquid raw materials; transferring the liquid raw materials covered with dry charcoal in a heat preservation furnace at the temperature of 1180 DEG C-1280 DEG C, and keeping the temperature for 25-30 minutes; then carrying out horizontal continuous casting at the casting temperature from 1100 DEG C to 1200 DEG C by adopting pulling, stopping and returning technologies; and carrying out face milling, intermediate annealing after cold rolling and cogging, as well as roughing and reduction, secondary intermediate annealing, surface cleaning and passivation, cold finishing rolling, low-temperature thermal treatment for finished products, surface cleaning and passivation, stretch bending leveling, thus the required high-electric-conductivity pure copper strips are obtained. According to the invention, the existing uniform annealing working procedure is omitted, expensive devices are not required to be purchased additionally, the technology complexity is lowered, and the cost is lowered.

Description

technical field [0001] The invention relates to a preparation method of a copper strip, in particular to a preparation method of a high-conductivity pure copper strip for a transformer. Background technique [0002] The pure copper strip used in the prior art does not have very strict restrictions on the application environment, so the requirements for various parameters of the pure copper strip are also very low. For example, the conventional pure copper strip has no requirement on the electrical conductivity, the height of the burrs on the pure copper strip is only required to be free of burrs visible to the naked eye, and there is no requirement on the length and width of the pure copper strip. [0003] However, in special occasions, such as transformers, in order to meet their special functions, such as high power, high precision control and other requirements, the parameters of pure copper strips, which are the main components of transformers, have also become very stri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/14B22D11/045C22F1/08
CPCY02P10/20
Inventor 祝福泉
Owner 宁波市鄞州锡青铜带制品有限公司
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