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A kind of oxygen-free copper-silver alloy casting production method

A production method and silver alloy technology are applied in the field of oxygen-free copper-silver alloy melting and casting, which can solve the problems of poor physical and mechanical properties, small specifications and high production costs, and achieve the effect of reducing the requirements of production equipment

Active Publication Date: 2021-09-21
ZHEJIANG TIANNING ALLOY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the production of oxygen-free copper-silver alloy by semi-continuous casting uses high-quality A-grade electrolytic copper with satisfactory chemical composition as raw material, and adopts imported special vacuum furnace for smelting, which requires large investment, complex casting system, high production cost and difficult equipment maintenance.
Moreover, the products produced have disadvantages such as small specifications (maximum unit weight of ingot ≤ 1000kg), coarse columnar crystal structure, poor physical and mechanical properties, and low product grades.
Continuous casting of oxygen-free copper-silver alloy is produced by the above-mentioned method, and the specifications are small, and the subsequent processing into large-scale products needs to be produced by a continuous extrusion machine. At present, the maximum production specification of the continuous extrusion machine is about 10,000mm in cross-sectional area. 2 products, and prone to adverse phenomena such as slag inclusion

Method used

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  • A kind of oxygen-free copper-silver alloy casting production method
  • A kind of oxygen-free copper-silver alloy casting production method
  • A kind of oxygen-free copper-silver alloy casting production method

Examples

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Embodiment 1

[0030] Step 1: Preparation of raw and auxiliary materials

[0031] 1) Raw materials: standard cathode copper or high-purity cathode copper is used for copper, and the surface is required to be smooth and free of patina and copper beans. Cut off the edge bumps and hanging ears, and brush off the surface dust and patina. Then keep warm at 100-200°C for preheating and drying for 2-4 hours. The silver adopts IC-Ag99.95 or IC-Ag99.99 brand silver ingots, cut into small pieces, and bake at 100-200°C for 1-2 hours in an incubator.

[0032] 2), Auxiliary materials: choose charcoal (hard solid wood just carbon) and flake graphite (the number of mesh is 60-100 mesh). Charcoal is baked before use (baked at 200-300°C for 3 hours) to eliminate moisture adsorbed on the surface and dehumidify; flake graphite is placed in a drying oven at 200-300°C before use, and kept warm for 8-12 hours for baking Dry treatment to remove surface adsorbed moisture and dehumidify.

[0033] Step 2: Smeltin...

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Abstract

The invention provides an oxygen-free copper-silver alloy melting and casting production method. The method of the invention is suitable for open-type industrial frequency induction furnace melting and casting to produce oxygen-free copper-silver alloy, and greatly reduces the requirements on production equipment for oxygen-free copper-silver alloy production. The invention method breaks through the small size of the existing oxygen-free copper-silver alloy ingot (the cross-sectional area of ​​the ingot is less than or equal to 30000mm) 2 ), large-scale oxygen-free copper-silver alloy ingots can be obtained (the cross-sectional area of ​​the ingots can reach 200,000 mm) 2 ).

Description

(1) Technical field [0001] The invention relates to an oxygen-free copper-silver alloy melting and casting production method, which is especially suitable for producing an oxygen-free copper-silver alloy by melting and casting an open-type power-frequency induction electric furnace. (2) Background technology [0002] Due to the characteristics of high purity and low oxygen content, oxygen-free copper-silver alloy has high electrical conductivity, thermal conductivity, good hydrogen embrittlement resistance, arc resistance, excellent processing performance, and welding performance. It has special and extensive uses, especially in the field of high voltage electric vacuum. [0003] At present, the semi-continuous casting of oxygen-free copper-silver alloy production uses high-quality A-grade electrolytic copper with satisfactory chemical composition as raw material, and adopts imported special vacuum furnace for smelting. The investment is large, the casting system is complex,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C9/00B22D11/111B22D11/115B22D11/20B22D11/22
CPCB22D11/004B22D11/111B22D11/115B22D11/20B22D11/22C22C1/02C22C9/00
Inventor 刘新伟王云岗钟文泉蒋洪赟丁新连
Owner ZHEJIANG TIANNING ALLOY MATERIAL
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