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Preparing method for copper-chromium alloy

A copper-chromium alloy and copper-chromium technology, applied in the field of alloy preparation and copper-chromium alloy preparation, can solve the problems of long process cycle, increased core wear and high production cost, and achieve improved casting process performance and increased tensile strength. Large, the effect of increasing conductivity

Inactive Publication Date: 2016-02-24
无棣向上机械设计服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the core of the copper-chromium alloy composite material prepared by this method is pure copper, when the surface layer is worn, the wear of the core will intensify, and the implementation of this method requires vacuuming, argon protection, and the crushing and atomization of the alloy melt. , deposition and other processes, the process cycle is longer and the production cost is higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The preparation method of copper-chromium alloy comprises the following steps:

[0019] 1) Preparation of copper-chromium master alloy: after weighing copper and chromium, put them in a graphite crucible and place in an induction furnace to raise the temperature to 1300°C. After fully melting, stir evenly and cool to obtain a copper-chromium master alloy;

[0020] 2) Preparation of mixed powder A: fully mix 30 parts of copper oxide, 8 parts of chromium trioxide, 6 parts of aluminum powder, 1 part of calcium fluoride, 1 part of molybdenum powder, and 2 parts of nickel powder, and stir evenly;

[0021] 3) Preparation of mixed powder B: fully mix 0.5 parts of nickel sulfate, 0.5 parts of magnesium sulfate, 0.3 parts of boric acid, 1 part of aluminum powder, and 0.2 parts of calcium fluoride, and stir evenly;

[0022] 4) Add the copper-chromium intermediate alloy into the graphite crucible and place it in the induction furnace to raise the temperature to 1250°C. After smelt...

Embodiment 2

[0030] The preparation method of copper-chromium alloy comprises the following steps:

[0031] 1) Preparation of copper-chromium master alloy: after weighing copper and chromium, put them in a graphite crucible and place in an induction furnace to raise the temperature to 1320°C. After fully melting, stir evenly and cool to obtain a copper-chromium master alloy;

[0032] 2) Preparation of mixed powder A: fully mix 35 parts of copper oxide, 12 parts of chromium trioxide, 8 parts of aluminum powder, 2.4 parts of calcium fluoride, 2.7 parts of molybdenum powder, and 3.5 parts of nickel powder, and stir evenly;

[0033] 3) Preparation of mixed powder B: fully mix 1.3 parts of nickel sulfate, 1.2 parts of magnesium sulfate, 0.6 parts of boric acid, 2.1 parts of aluminum powder, and 0.7 parts of calcium fluoride, and stir evenly;

[0034] 4) Add the copper-chromium intermediate alloy into the graphite crucible and place it in the induction furnace to raise the temperature to 1300°C....

Embodiment 3

[0042] The preparation method of copper-chromium alloy comprises the following steps:

[0043] 1) Preparation of copper-chromium master alloy: after weighing copper and chromium, put them in a graphite crucible and place in an induction furnace to heat up to 1350°C. After fully melting, stir evenly and cool to obtain a copper-chromium master alloy;

[0044] 2) Preparation of mixed powder A: fully mix 40 parts of copper oxide, 15 parts of chromium trioxide, 12 parts of aluminum powder, 3 parts of calcium fluoride, 3 parts of molybdenum powder, and 6 parts of nickel powder, and stir evenly;

[0045] 3) Preparation of mixed powder B: fully mix 2 parts of nickel sulfate, 2 parts of magnesium sulfate, 1.2 parts of boric acid, 3 parts of aluminum powder, and 1 part of calcium fluoride, and stir evenly;

[0046] 4) Add the copper-chromium intermediate alloy into the graphite crucible and place it in the induction furnace to raise the temperature to 1350°C. After smelting for 2 hours,...

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PUM

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Abstract

The invention discloses a preparing method for a copper-chromium alloy. The preparing method includes the following steps that 1, a copper-chromium intermediate alloy is prepared; 2, mixed powder A is prepared; 3, mixed powder B is prepared; 4, the copper-chromium intermediate alloy is added into a graphite crucible to be arranged in an induction furnace, and after heating smelting is carried out for 1 h to 2 h, the mixed powder A and the mixed power B are sequentially added and stirred; 5, a slag making material is added into the melt in the graphite crucible, and heat preserving is carried out; and 6, after the slag making material is removed, heat preserving and natural cooling are carried out. According to the preparing method, the copper-chromium alloy is obtained by preparing the copper-chromium intermediate alloy in advance, and therefore the casting technological properties are 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 Applications(China)
IPC IPC(8): C22C1/03C22C9/00
CPCC22C1/03C22C9/00
Inventor 李瑞国
Owner 无棣向上机械设计服务有限公司
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