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Preparation method of copper-chrome alloy

A copper-chromium alloy and charging technology, which is applied in the field of alloy material preparation, can solve the problems of high requirements on process parameters such as operating temperature, can not effectively meet energy-saving requirements, and high energy consumption, and achieves reduction in the number of pores and heat loss. good quality effect

Inactive Publication Date: 2014-07-16
SHENZHEN YUANSIDACHENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The remelting current, operating temperature and other process parameters in the electroslag remelting process have high requirements, and the requirements for experimental equipment are also relatively high, and the energy consumption is high, which cannot effectively meet the energy saving requirements

Method used

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  • Preparation method of copper-chrome alloy
  • Preparation method of copper-chrome alloy
  • Preparation method of copper-chrome alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Clean and assemble the charged graphite mold and forming mold, put the baffle into the bottom of the graphite mold, and then preheat the mold, the preheating temperature is 200-300°C, and the preheating time is about 15 minutes.

[0034] The raw materials were weighed, among which aluminum powder (200 mesh), chromium trioxide (200 mesh) and 55% copper oxide (100 mesh) were all industrial grade. Magnesium Sulfate (MgSO 4 ) can not only provide heat, but also have a slagging effect, and the slagging agent is selected as calcium fluoride (CaF 2 ); Raw material weight ratio is (Wt%):

[0035]

[0036] First put the material of layer A into the mixer, and the mixing time is 3 minutes. Since the mixing process is easy to generate heat, in order to ensure that the heat in this process is fully dissipated and the operation safety is improved, the mixer is kept in an intermittent working state. , that is, mixing for about 15 seconds, stopping for about 10 seconds, mixing fo...

Embodiment 2

[0038] Clean and assemble the charged graphite mold and forming mold, put the baffle into the bottom of the graphite mold, and then preheat the mold, the preheating temperature is 200-300°C, and the preheating time is about 15 minutes.

[0039] The raw materials were weighed, wherein aluminum powder, chromium trioxide and 55% copper oxide were all industrial grades. Magnesium Sulfate (MgSO 4 ) can not only provide heat, but also have a slagging effect, and the slagging agent is selected as calcium fluoride (CaF 2 ); Raw material weight ratio is (Wt%):

[0040]

[0041]First put the material of layer A into the mixer, and the mixing time is 3 minutes. Since the mixing process is easy to generate heat, in order to ensure that the heat in this process is fully dissipated and the operation safety is improved, the mixer is kept in an intermittent working state. , that is, mixing for about 15 seconds, stopping for about 10 seconds, mixing for about 15 seconds, stopping for 10 s...

Embodiment 3

[0043] Clean and assemble the charged graphite mold and forming mold, put the baffle into the bottom of the graphite mold, and then preheat the mold, the preheating temperature is 200-300°C, and the preheating time is about 15 minutes.

[0044] The raw materials were weighed, wherein aluminum powder, chromium trioxide and 55% copper oxide were all industrial grades. Magnesium Sulfate (MgSO 4 ) can not only provide heat, but also have a slagging effect, and the slagging agent is selected as calcium fluoride (CaF 2 ); Raw material weight ratio is (Wt%):

[0045]

[0046] First put the material of layer A into the mixer, and the mixing time is 3 minutes. Since the mixing process is easy to generate heat, in order to ensure that the heat in this process is fully dissipated and the operation safety is improved, the mixer is kept in an intermittent working state. , that is, mixing for about 15 seconds, stopping for about 10 seconds, mixing for about 15 seconds, stopping for 10 ...

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Abstract

The invention discloses a preparation method of copper-chrome alloy, and belongs to the technical field of the preparation of alloy material. In the method, 55% CuO, Cr2O3 and aluminum powder are taken as main raw materials. The preparation method comprises the following steps of: adding MgSO4 and CaF2; adopting a material laminated self-propagating reaction technology, wherein A layer is the mixed materials of CuO, Cr2O3, aluminum powder and CaF2 and the mixed materials are added on the bottom layer of a reaction mould, B layer is the mixture of MgSO4, Al and CaF2 and the mixture is added on the A layer materials, and an igniting agent is added on the B layer material; and adopting an aluminothermic reducing method to obtain copper-chrome (Cu-Cr) alloy. According to the preparation method, the raw material source is wide, the production cost is low, the operation method is simple, and the product quality is greatly improved.

Description

technical field [0001] The invention relates to a method for preparing an alloy, in particular to a method for preparing a copper-chromium alloy, and belongs to the technical field of alloy material preparation. Background technique [0002] Copper-chromium alloy has the advantages of high strength and hardness, good thermal conductivity and electrical conductivity, and strong corrosion resistance. It is widely used in the preparation of resistance electrodes, contact materials and other fields that require high conductivity and high strength, especially in high-power vacuum In high-voltage switches, copper-chromium alloys show broad application prospects. [0003] In order to meet the wide demand of copper-chromium alloys, domestic and foreign related enterprises and professionals have carried out a lot of experiments and research work on the preparation process of copper-chromium alloys, and made some progress. For example, the title of the invention is a production metho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C1/02C22B5/04
Inventor 张国栋杨辉胡玉华
Owner SHENZHEN YUANSIDACHENG TECH
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