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A method for preparing beryllium-copper master alloy by vacuum consumable arc melting

A vacuum consumable arc and master alloy technology, applied in the field of metal material manufacturing, can solve problems such as high cost, high energy consumption, pollution, etc., and achieve the effect of good product purity and quality, and easy industrial production.

Active Publication Date: 2022-02-15
五矿铍业股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The invention can effectively solve a series of problems existing in the current smelting production process of beryllium-copper master alloy atmosphere-connected graphite non-consumable electrode electric arc furnace, such as low recovery rate caused by metal volatilization, pollution to the environment inside and outside the production workshop, High energy consumption and high cost provide a new method and process for the production of beryllium-copper master alloys, especially beryllium-copper master alloys with high beryllium content, which helps to achieve low-cost, high-performance, and zero-pollution beryllium-copper master alloys Production

Method used

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  • A method for preparing beryllium-copper master alloy by vacuum consumable arc melting
  • A method for preparing beryllium-copper master alloy by vacuum consumable arc melting
  • A method for preparing beryllium-copper master alloy by vacuum consumable arc melting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] A beryllium-copper master alloy with a nominal beryllium content of 8 wt% and a nominal copper content of 92 wt% was prepared. The amount of carbon equivalent and beryllium oxide conforms to stoichiometry (according to 2BeO+C=2Be+CO 2 Calculate, the same below), and add 0.5% in excess (that is, add graphite powder at 1.005 times the carbon equivalent, the same below). The amount of copper powder is calculated according to the beryllium content in the target beryllium-copper master alloy based on the beryllium generated by the above-mentioned carbothermal reduction reaction. According to the calculated raw materials, copper powder, beryllium oxide powder and graphite powder are mixed evenly to obtain a mixed powder. Before the beryllium oxide is mixed, it is coated with PVA (by spraying method, the same below). The amount of PVA is beryllium oxide powder of 1wt%. Use 1.5t / cm of mixed powder 2 The pressure is pressed into a slab of 2mm*100mm*400mm, and then rolled with...

Embodiment 2

[0101] Prepare a beryllium-copper master alloy with a nominal beryllium content of 10% mass fraction and a nominal copper content of 90%. The amount of carbon equivalent and beryllium oxide is stoichiometric, and an excess of 1.0% is added. The amount of copper powder is calculated according to the beryllium content in the target beryllium-copper master alloy based on the beryllium generated by the above-mentioned carbothermal reduction reaction. The calculated raw material copper powder, beryllium oxide powder and graphite powder are mixed evenly to obtain mixed powder. Before the beryllium oxide is mixed, it is coated with PVA, and the amount of PVA is 1% of the mass fraction of beryllium oxide. Using 1.5t / cm 2 Press the mixed powder into a plate of 2mm*100mm*400mm, and then roll it with a rolling mill with a roll gap of 1mm. The pieces obtained by rolling are further broken into billet powder with a particle size of no more than 1mm, and then annealed at 280°C for 1 hour,...

Embodiment 3

[0110] Repeat Comparative Example 10, the only difference is that the green body is not sintered in a hot isostatic pressing furnace, specifically, the green body is sintered in an ordinary sintering furnace and the graphite mold described in Example 1, and the green body is loaded in In the graphite mold, the graphite mold is then placed in a common sintering furnace for sintering.

[0111] The working electrode performed well in the process of vacuum consumable electrode arc melting furnace, no fracture occurred, and the melting process was successfully completed. The beryllium content of beryllium copper is 12.10% and the copper content is 87.90% by sampling from the beryllium copper master alloy rod obtained in the crystallizer.

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Abstract

The invention relates to a method for preparing a beryllium-copper master alloy by vacuum consumable arc smelting. Copper powder, beryllium oxide powder and graphite powder are weighed; after the beryllium oxide powder is coated, the beryllium oxide powder, copper powder and The graphite powder is mixed evenly to obtain a mixed powder; then the mixed powder is pressed to obtain a slab; then the slab is rolled to obtain fragments and crushed to obtain a billet powder with a particle size of no more than 1 mm; anneal the billet powder Finally, add paraffin powder, mix evenly, and then press and form to obtain a columnar green body; load the columnar green body in a graphite mold, sinter and demould to obtain a working electrode; then put the working electrode into a vacuum consumable electric arc furnace, Vacuum consumable electrode arc melting is carried out to obtain beryllium copper master alloy. The invention can easily realize the preparation of the beryllium-copper master alloy with high beryllium content, and the preparation success rate is high. The method of the invention does not need crucible smelting and special pressure sintering furnace, and has low production cost and is easy for industrialized production.

Description

technical field [0001] The invention relates to a method for preparing a beryllium-copper master alloy by adopting vacuum consumable arc melting, which belongs to the field of metal material manufacturing. Background technique [0002] Beryllium is a light metal element, which is mainly used in the production of special alloys. It has an obvious strengthening effect on non-ferrous metals, especially copper and aluminum alloys. It has special value in aviation, aerospace and other industrial fields, and has a wide range of applications in various sectors of the national economy. application. [0003] At present, the common production process of beryllium-copper master alloy is the atmospheric non-consumable arc melting method, and the atmosphere-connected graphite electrode is used for production. The production site often needs to adopt various protective equipment and measures to better protect operators and protect The environment, each production enterprise invests hugel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00B22F3/02B22F3/03B22F3/10B22F9/04C22B9/20C22C1/02
CPCC22C9/00C22B9/20C22C1/02B22F3/02B22F9/04B22F3/03B22F3/10B22F2009/047
Inventor 王松林郭庆曾志彦彭时军谢奕斌刘睿杰黄燕海黄劲松
Owner 五矿铍业股份有限公司
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