CN102277513B - Preparation technology of copper and magnesium intermediate alloy - Google Patents
Preparation technology of copper and magnesium intermediate alloy Download PDFInfo
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- CN102277513B CN102277513B CN 201110240990 CN201110240990A CN102277513B CN 102277513 B CN102277513 B CN 102277513B CN 201110240990 CN201110240990 CN 201110240990 CN 201110240990 A CN201110240990 A CN 201110240990A CN 102277513 B CN102277513 B CN 102277513B
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Abstract
The invention discloses a preparation technology of copper and magnesium intermediate alloy, and the aluminum comprises the following steps: A. burdening in the percentage by weight of copper and magnesium intermediate alloy ingredients which need to be prepared, wherein copper accounts for 50-95%, and magnesium accounts for 5-50%; B. putting copper into an intermediate frequency induction heating furnace, adding one layer of coating agent with the thickness of 1-2cm on the surface, heating to melt, and heating to 1150-1200DEG C; C. after nitrogen is introduced in for one minute, removing a covering layer, pressing magnesium blocks into a melt by batches with a bell jar, replenishing one layer of coating agent of which the thickness is about 1cm after magnesium is added, alloying for 10-15 minutes, and stirring for 2-3 times during alloying; and D. spraying one layer of sulphur powder on the surface layer of a die, and quickly casting into an ingot after the coating agent is discharged. The preparation technology disclosed by the invention can be carried out under normal pressure, thereby omitting an expensive vacuum smelting furnace and higher technical operation requirements, and greatly lowering production cost, and thus the preparation technology is more suitable for industrial large-scale production. The preparation technology is a qualitative improvement for the existing preparation technology of copper and magnesium intermediate alloy.
Description
Technical field
The present invention relates to the preparation technology of the copper magnesium master alloy in a kind of non-ferrous metal alloy, specifically, relate to the preparation technology of copper magnesium master alloy under a kind of non-vacuum condition.
Background technology
Copper-magnesium alloy strand is as main raw material take copper-magnesium alloy, adding other trace elements forms through special founding, drawing, have physical strength height, good corrosion resistance, the advantages such as conductivity is good, overload capacity is large, Heat stability is good, be to produce at present the Highspeed Catenary carrier cable and the ideal material that hangs suspension wire.In addition, copper-magnesium alloy strand loud speaker lead-in wire, sound equipment and high-tension enameled wire etc. special aspect line, also have comparatively widely use.Research is found: the electroconductibility of trace magnesium reduction copper is less, but copper is had desoxydatoin, can also improve the high-temperature oxidation resistance of copper; Magnesium is the element that is difficult to continous-stable control in fusion-casting process, the copper-magnesium alloy of practical application, and its Mg content is generally less than 1%, the control breakdown of too high then pressure machining characteristics, this class alloy can only work hardening, can not heat treatment reinforcement.As everyone knows, magnesium is a kind of very active metallic element, and its fusing point is lower 434 ℃ than copper, and its density is the about 1/5th of copper, and its boiling point is 1170 ℃, approaches with the smelting temperature of copper alloy.If adopt the mode of directly adding MAGNESIUM METAL in the copper liquid of melting, at high temperature, magnesium very easily burns and volatilizees.Not only affect its specific absorption in copper, make that Mg content is difficult to accurate control in the copper alloy, and produce a large amount of oxidation sludges, sneak into copper melts and will seriously reduce quality product.One of key of therefore, producing high-quality copper-magnesium alloy is to solve the problem of how to add magnesium elements in copper melts.Chinese invention patent CN200910242708.7 discloses a kind of preparation method of copper magnesium master alloy, is at first magnesium to be melted in vacuum oven, adds metallic copper after adjustment temperature and the vacuum tightness, is rapidly heated to fusing, and rear cast molding stirs.The preparation method that this patent is announced, the magnesium elements scaling loss is little, and the copper degree of oxidation is few, can make the copper magnesium master alloy of inner no significant defect.The defective of its existence is: preparation technology need to carry out under vacuum condition, and cast(ing) surface is black, and single heat melting charging capacity is lower, only is that production efficiency is lower about 100Kg; Simultaneously, vacuum smelting equipment investment and running cost are higher, not too are applicable to industrial scale batch production.
Summary of the invention
The objective of the invention is the deficiency for copper magnesium master alloy vacuum melting existence in the prior art, the preparation technology of copper magnesium master alloy under a kind of non-vacuum condition is provided.
The present invention is realized that by following technical scheme the preparation technology of copper magnesium master alloy carries out according to the following steps,
A, prepare burden copper 50%-95%, magnesium 5%-50% by the weight percent of copper magnesium master alloy composition to be prepared;
B, copper is dropped into Medium Frequency Induction Heating Furnace, the surface adds thick layer 1-2 centimetre insulating covering agent, and heat fused also is warming up to 1150-1200 ℃;
C, pass into nitrogen after about 1 minute, push tectum aside, use bell jar that MAG block is pressed into melt in batches, add the insulating covering agent that complete rear surface is added about 1 centimetre of thick layer again, alloying 10-15 minute, during stir 2-3 time;
D, in mould top layer spraying one deck SULPHUR POWDER, discharge insulating covering agent after, be cast into rapidly ingot casting.
Insulating covering agent of the present invention is: the mixture of 40-60% glass powder, 20-40% yellow soda ash, 10-30% wood charcoal powder.
After testing, according to the copper magnesium master alloy of technique preparation of the present invention, homogeneous chemical composition, inner no significant defect, the copper magnesium master alloy for preparing under its technical indicator and the vacuum condition is equal to, and the ingot casting surface is bright coppery; Single heat melting charging capacity is large, the about 400Kg of every heat charging capacity, and production efficiency improves more than 2 times than the vacuum melting technology.This preparation technology can carry out under condition of normal pressure; expensive vacuum melting furnace and higher technological operation requirement have been save; greatly reducing production cost, be more suitable in industrial large-scale production, is the improvement to existing copper magnesium master alloy preparation technology's a matter.
Embodiment
Embodiment 1:
Take by weighing metallic copper 380Kg, MAGNESIUM METAL 20Kg, copper is dropped in the Medium Frequency Induction Heating Furnace, the surface adds thick layer 1-2 centimetre insulating covering agent, and heat fused also is warming up to 1180 ± 5 ℃.Pass into nitrogen after 1 minute, push tectum aside, use bell jar that MAG block is pressed into melt in batches, add the insulating covering agent that about 1 centimetre of thick layer is added on complete surface again, alloying time is controlled at 10-15 minute, during stir 2-3 time with graphite rod.In mould top layer spraying one deck SULPHUR POWDER, behind the discharge insulating covering agent, be cast into rapidly ingot casting.By the copper magnesium master alloy of said ratio and technique preparation, its chemical ingredients is: Mg:4.8%, copper: 95.2%.
Embodiment 2:
Take by weighing metallic copper 360Kg, MAGNESIUM METAL 40Kg, copper is dropped in the Medium Frequency Induction Heating Furnace, the surface adds thick layer 1-2 centimetre insulating covering agent, and heat fused also is warming up to 1160 ± 5 ℃.Pass into nitrogen after 1 minute, push tectum aside, use bell jar that MAG block is pressed into melt in batches, add the insulating covering agent that about 1 centimetre of thick layer is added on complete surface again, alloying time is controlled at 10-15 minute, during stir 2-3 time with graphite rod.In mould top layer spraying one deck SULPHUR POWDER, behind the discharge insulating covering agent, be cast into rapidly ingot casting.By the copper magnesium master alloy of said ratio and technique preparation, its chemical ingredients is: Mg:9.6%, copper: 90.4%.
Embodiment 3:
Take by weighing metallic copper 320Kg, MAGNESIUM METAL 80Kg, copper is dropped in the Medium Frequency Induction Heating Furnace, the surface adds thick layer 1-2 centimetre insulating covering agent, and heat fused also is warming up to 1170 ± 5 ℃.Pass into nitrogen after 1 minute, push tectum aside, use bell jar that MAG block is pressed into melt in batches, add the insulating covering agent that about 1 centimetre of thick layer is added on complete surface again, alloying time is controlled at 10-15 minute, during stir 2-3 time with graphite rod.In mould top layer spraying one deck SULPHUR POWDER, behind the discharge insulating covering agent, be cast into rapidly ingot casting.By the copper magnesium master alloy of said ratio and technique preparation, its chemical ingredients is: Mg:18.8%, copper: 81.2%.
Embodiment 4:
Take by weighing metallic copper 280Kg, MAGNESIUM METAL 120Kg, copper is dropped in the Medium Frequency Induction Heating Furnace, the surface adds thick layer 1-2 centimetre insulating covering agent, and heat fused also is warming up to 1160 ± 5 ℃.Pass into nitrogen after 1 minute, push tectum aside, use bell jar that MAG block is pressed into melt in batches, add the insulating covering agent that about 1 centimetre of thick layer is added on complete surface again, alloying time is controlled at 10-15 minute, during stir 2-3 time with graphite rod.In mould top layer spraying one deck SULPHUR POWDER, behind the discharge insulating covering agent, be cast into rapidly ingot casting.By the copper magnesium master alloy of said ratio and technique preparation, its chemical ingredients is: Mg:28.2%, copper: 71.8%.
Embodiment 5:
Take by weighing metallic copper 237Kg, MAGNESIUM METAL 163Kg, copper is dropped in the Medium Frequency Induction Heating Furnace, the surface adds thick layer 1-2 centimetre insulating covering agent, and heat fused also is warming up to 1160 ± 5 ℃.Pass into nitrogen after 1 minute, push tectum aside, use bell jar that MAG block is pressed into melt in batches, add the insulating covering agent that about 1 centimetre of thick layer is added on complete surface again, alloying time is controlled at 10-15 minute, during stir 2-3 time with graphite rod.In mould top layer spraying one deck SULPHUR POWDER, behind the discharge insulating covering agent, be cast into rapidly ingot casting.By the copper magnesium master alloy of said ratio and technique preparation, its chemical ingredients is: Mg:38.5%, copper: 61.5%.
Embodiment 6:
Take by weighing metallic copper 194Kg, MAGNESIUM METAL 206Kg, copper is dropped in the Medium Frequency Induction Heating Furnace, the surface adds thick layer 1-2 centimetre insulating covering agent, and heat fused also is warming up to 1160 ± 5 ℃.Pass into nitrogen after 1 minute, push tectum aside, use bell jar that MAG block is pressed into melt in batches, add the insulating covering agent that about 1 centimetre of thick layer is added on complete surface again, alloying time is controlled at 10-15 minute, during stir 2-3 time with graphite rod.In mould top layer spraying one deck SULPHUR POWDER, behind the discharge insulating covering agent, be cast into rapidly ingot casting.By the copper magnesium master alloy of said ratio and technique preparation, its chemical ingredients is: Mg:48.2%, copper: 51.8%.
The described insulating covering agent of above-described embodiment is: the mixture of 40-60% glass powder, 20-40% yellow soda ash, 10-30% wood charcoal powder.
Claims (1)
1. the preparation technology of copper magnesium master alloy is characterized in that, carries out according to the following steps:
A, prepare burden copper 50%-95%, magnesium 5%-50% by the weight percent of copper magnesium master alloy composition to be prepared;
B, copper is dropped into Medium Frequency Induction Heating Furnace, the surface adds thick layer 1-2 centimetre insulating covering agent, and heat fused also is warming up to 1150-1200 ℃;
C, pass into nitrogen after 1 minute, push tectum aside, use bell jar that MAG block is pressed into melt in batches, add the insulating covering agent that complete rear surface is added 1 centimetre of thick layer again, alloying 10-15 minute, during stir 2-3 time;
D, in mould top layer spraying one deck SULPHUR POWDER, discharge insulating covering agent after, be cast into rapidly ingot casting;
Described insulating covering agent is: the mixture of 40-60% glass powder, 20-40% yellow soda ash, 10-30% wood charcoal powder.
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| CN116411195A (en) * | 2023-04-19 | 2023-07-11 | 云南大学 | Control method for magnesium content in copper-magnesium alloy preparation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101717871A (en) * | 2009-12-15 | 2010-06-02 | 北京有色金属研究总院 | Preparation method of copper and magnesium master alloy |
| CN101892404A (en) * | 2010-06-21 | 2010-11-24 | 济南大学 | Method for preparing zinc-titanium intermediate alloy |
| CN101906545A (en) * | 2010-07-13 | 2010-12-08 | 北京科技大学 | Preparation method of Mg-contained hydrogen storage alloy |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101717871A (en) * | 2009-12-15 | 2010-06-02 | 北京有色金属研究总院 | Preparation method of copper and magnesium master alloy |
| CN101892404A (en) * | 2010-06-21 | 2010-11-24 | 济南大学 | Method for preparing zinc-titanium intermediate alloy |
| CN101906545A (en) * | 2010-07-13 | 2010-12-08 | 北京科技大学 | Preparation method of Mg-contained hydrogen storage alloy |
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