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Covering agent for smelting copper alloy

A covering agent and copper alloy technology, which is applied in the field of copper alloy processing, can solve the problems of unsatisfactory protection effect of alloy elements that are easy to oxidize, difficulty in meeting industrial requirements for covering agents, and low yield, and achieve good protection effect and covering effect Good, high yield effect

Active Publication Date: 2010-09-01
SHENYANG NONFERROUS METALS PROCESSING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these covering agents are widely used in industry, their protection effect on alloy elements that are easy to oxidize is not ideal, the elements are burned seriously, and the yield is very low.
Especially in the melting of CuCrZr and other alloys in a non-vacuum environment, the existing covering agent is difficult to achieve the effect required by the industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take 50kg of calcium chloride, 40kg of sodium chloride, 3kg of calcium fluoride, 3kg of sodium fluoroaluminate and 4kg of potassium chloride and mix them, then put them into an electric furnace and raise the temperature to 600°C for 2 hours.

Embodiment 2

[0029] Take 68kg of calcium chloride, 20kg of sodium chloride, 4kg of calcium fluoride, 3kg of sodium fluoroaluminate and 5kg of potassium chloride, mix and stir, then put it into an electric furnace and raise the temperature to 700°C and keep it warm for 2 hours.

[0030] How to use and effect:

[0031] The equipment for smelting copper alloy adopts medium-frequency induction furnace, which can smelt copper, chromium, zirconium and other alloys in the atmospheric environment. The raw materials are electrolytic copper plates, copper-chromium master alloys, copper-zirconium master alloys, copper-magnesium master alloys, etc. The covering agent for copper alloy smelting of the present invention is used for bottom covering; flake graphite and charcoal are used as upper covering. The two-stage covering can ensure a high yield of easily oxidized elements such as zirconium, chromium, and magnesium in the alloy melt. Generally, the yield of chromium reaches 90%, the yield of zircon...

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PUM

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Abstract

The invention discloses a covering agent for smelting copper alloy, which is prepared by adopting the mixture of calcium chloride, potassium chloride, sodium chloride, sodium fluoaluminate and calcium fluoride; one layer of favourable protective layer with the thickness of 5-80 mm is formed on the surface of smelting furnace solution so as to effectively prevent oxygen in air outside a molten pool from entering and avoid oxidation burning loss of alloy elements in the smelting process, and the covering agent has the action of thermal insulation. The covering agent of the invention can ensure that copper alloy requiring vacuum smelting can be smelted under the atmospheric environment. The covering agent of the invention is suitable for smelting copper alloy, such as copper zirconium, copper chromium, copper magnesium, copper chromium zirconium and the like which contain oxidizable elements, and is suitable for ingot blank casting, vertical continuous casting, horizontal continuous casting, up-drawing continuous casting and the like.

Description

technical field [0001] The invention relates to a covering agent for copper alloy smelting, which belongs to the technical field of copper alloy processing. Background technique [0002] In the processing technology of copper alloys, generally in the smelting process of copper and copper alloys, especially when smelting CuCr alloys, CuZr alloys, CuMg alloys, CuCrZr alloys and other alloys whose alloy elements are easily oxidized, it is necessary to apply a covering agent. At present, the covering agents involved in existing and patent applications are mainly calcined charcoal, flake graphite, carbon black, rice bran, etc. Such as patent application CN1861819 "Cu-Cr-Zr alloy and the non-vacuum melting and casting process of Cu-Zr alloy" (public date on November 15th, 2006), it is mentioned that carbon black is used as a covering agent; as the article "high strength and high conductivity CuCrZr alloy Smelting Technology Research" ("Special Casting and Nonferrous Alloys" 2005,...

Claims

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Application Information

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IPC IPC(8): B22D11/111
Inventor 周文龙孙中刚邹彬陈国清昌锋
Owner SHENYANG NONFERROUS METALS PROCESSING CO LTD
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