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Additive for aluminum alloy melting

An additive, aluminum alloy technology, used in the smelting of non-ferrous metals and alloys, and the field of aluminum alloy smelting agent refining, can solve the problems of inability to achieve complete alloying, unstable composition control, slow melting speed, etc., to achieve easy operation and storage. The effect of transportation and prevention of chalking

Inactive Publication Date: 2012-08-01
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of directly adding pure metal blocks such as iron, copper, manganese, titanium, etc., because the melting point of these metals (above 1000 ° C) is much higher than the temperature of the aluminum melting furnace (720 ° C ~ 760 ° C), the melting speed is slow and cannot achieve complete alloying. Purpose: Al-Fe, Al-Mn, Al-Cu, Al-Ti and other master alloys are added. The melting point of these master alloys is close to the temperature in the aluminum smelting furnace, which is conducive to smelting, but there are also low absorption rates and unstable composition control. And the disadvantages of serious burning of elements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1 is used for the iron additive of smelting aluminum alloy

[0013] Composition of raw materials: iron powder with a particle size of 100 mesh and a purity of ≥99%, a halogen salt cosolvent mixed with potassium chloride and potassium fluoride, paraffin wax powder, and higher fatty acids.

[0014] Raw material ratio (mass percentage): iron powder 75%, halogen salt cosolvent 20%, paraffin wax 2%, higher fatty acid 3%.

[0015] Preparation method: mix the well-proportioned raw materials evenly to form a composite powder, put it into a mold, and use a hydraulic press to cold press at room temperature, pressure 50MPa, and holding time 60 seconds, that is, press it into aluminum powder. Iron additive for alloy smelting.

Embodiment 2

[0016] Embodiment 2 is used for the titanium agent additive of smelting aluminum alloy

[0017] Composition of raw materials: titanium powder with a particle size of 90 mesh and a purity of ≥98%, a halogen salt cosolvent mixed with potassium chloride, potassium fluoride, potassium iodide, and potassium fluorosilicate, paraffin wax powder, and higher fatty acids.

[0018] Raw material ratio (mass percentage): titanium powder 70%, halogen salt cosolvent 25%, paraffin wax 2.5%, higher fatty acid 2.5%.

[0019] Preparation method: Mix well-proportioned raw materials evenly to form a composite powder, put it into a mold, and use a hydraulic press to cold press at room temperature, a pressure of 70MPa, and a holding time of 100 seconds, that is, to press into a composite powder for aluminum Titanium additive for alloy melting.

Embodiment 3

[0020] Embodiment 3 is used for the manganese agent additive of smelting aluminum alloy

[0021] Raw material composition: manganese powder with a particle size of 95 mesh and a purity of ≥98%, a halogen salt cosolvent mixed with potassium chloride, potassium fluoride, potassium iodide, potassium fluorosilicate, and potassium fluoroaluminate, paraffin wax powder, and higher fatty acids .

[0022] Raw material ratio (mass percentage): manganese powder 65%, halogen salt cosolvent 30%, paraffin wax 3%, higher fatty acid 2%.

[0023] Preparation method: Mix the well-proportioned raw materials evenly to form a composite powder, put it into a mold, and use a hydraulic press to cold press at room temperature, pressure 75MPa, and holding time 80 seconds, that is, press it into aluminum powder. Manganese agent additive for alloy smelting.

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PUM

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Abstract

The invention discloses an additive for aluminum alloy melting. The additive comprises: by mass, 65 to 75% of metal powder having granularity of 80 to 100 meshes, 20 to 30% of one or more halide salt cosolvents, 1 to 3% of paraffin powder and 1 to 3% of a moisture-proofing agent. The metal powder is at least one of iron powder, copper powder, manganese powder, titanium powder and nickel powder. The one or more halide salt cosolvents are selected from potassium chloride, potassium fluoride, potassium iodide, potassium fluosilicate and potassium fluoroaluminate. Through use of the paraffin powder and the one or more halide salt cosolvents, good bonding effects on metal powder are obtained; pulverization of metal powder is prevented effectively; an additive falling speed is reduced; and a melting speed is obviously improved. The additive provided by the invention solves the problems of a high additive melting temperature and a low metal powder absorption rate, realizes a high metal powder absorption rate reaching to 99%, and improves the quality of an aluminum alloy ingot casting.

Description

technical field [0001] The invention belongs to the technical field of smelting of nonferrous metals and alloys, in particular to the technical field of aluminum alloy melting agent refining. Background technique [0002] Aluminum and aluminum alloys have the characteristics of low density, good electrical and thermal conductivity, good oxidation and corrosion resistance, easy plastic processing, high reflectivity to light, heat, and radio waves, good surface treatment performance, and superior shock absorption and noise reduction performance. It is used in aviation, aerospace, ships, automobiles, building materials and daily household and other fields. Alloying elements need to be added when aluminum alloy is smelted. The commonly used elements are iron, copper, manganese, titanium, chromium, zirconium, silicon and so on. The method of directly adding pure metal blocks such as iron, copper, manganese, titanium, etc., because the melting point of these metals (above 1000 ° ...

Claims

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Application Information

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IPC IPC(8): C22C1/06B22F3/03C22C21/00
Inventor 范荣辉闫晓东
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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