Copper alloy electroslag remelting process

A technology of electroslag remelting and copper alloy, which is applied in the field of copper alloy production, and can solve problems such as the reduction of copper alloy thermal processing output rate and copper alloy cracking

Inactive Publication Date: 2005-02-16
ZHONGYUAN SPECIAL STEEL
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AI Technical Summary

Problems solved by technology

Impurities and coarse as-cast structures in ordinary copper alloy ingots or copper alloy continuous casting slabs often lead to cracking of copper alloys during thermal processing, which reduces the yield of copper alloys during thermal processing.

Method used

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Examples

Experimental program
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Embodiment

[0014] Example, electroslag remelted B30 copper alloy (containing 68% copper and 30% nickel). The melting point of the alloy is about 1250°C, and the slag system used for electroslag remelting is binary slag: CaF 2 : MgF 2 =80:20 (weight ratio), the melting point of slag is 1150°C. MgF 2 Contains about 10% water of crystallization, and is baked at 400°C for 4 hours to remove moisture before electroslag remelting. The consumable electrode is a Φ145mm continuous casting slab, and the Φ260mm electroslag ingot is produced. The average melting rate is controlled between 200-220kg / hour. After lifting the mold, it is found that the surface of the electroslag ingot is not smooth and has many pits

[0015] Increase the melting rate to 250kg / hour, the surface of the electroslag ingot improves, especially the surface of the upper part of the electroslag ingot is very smooth. Table 2 shows the surface quality of electroslag ingots when controlling different melting rates. Before reme...

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Abstract

Copper alloy electroslag remelting process belongs to field of copper alloy production technology. Electroslag remelting chooses slag system whose melting point is lower 100-200degC than copper alloy, slag is thorough dry before remelting; electroslag remelting can take place under the protection of dry nitrogen gas. In the process of electroslag remelting add metal aluminium, metal RE, zirconium iron, carbon powder, calcium carbide, or magnesium alloy as deoxidizer continuously or interruptedly, add remelting metal 0.3-1.5Kg in one ton. In the process of electroslag remelting take out of ingot to produce electroslag ingot, by blowing or spraying take the second cooling. If it do not take the second cooling,electroslag remelting melting rate(Kg/h)=(1.0-1.5)*crystallizer diameter(mm). If it take the second cooling, electroslag remelting melting rate(Kg/h)=(1.5-3.0)*crystallizer diameter(mm). The designing height of taking out of ingot crystallizer is 1.2-2.0 times as crystallizer diameter, taper is 0.2-2%. The copper alloy has good hot workability produced by this invention.

Description

technical field [0001] The invention belongs to the technical field of copper alloy production, in particular to a copper alloy electroslag remelting process. Background technique [0002] Copper alloys are widely used in machinery, shipbuilding and other fields because of their good electrical and thermal conductivity, corrosion resistance and other technological properties. Impurities and coarse as-cast structures in ordinary copper alloy ingots or copper alloy continuous casting slabs often lead to cracking of copper alloys during thermal processing, which reduces the yield of copper alloys during thermal processing. In order to improve the yield rate of copper alloy thermal processing, it is imperative to improve the purity of copper alloy, improve its as-cast structure, and improve its high-temperature plasticity. Contents of the invention [0003] The purpose of the present invention is to provide a copper alloy electroslag remelting process, and the copper alloy pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/18
Inventor 熊长聚高宏生杨洪
Owner ZHONGYUAN SPECIAL STEEL
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