CN102280206A - Method for manufacturing tungsten-copper alloy wire rod - Google Patents
Method for manufacturing tungsten-copper alloy wire rod Download PDFInfo
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- CN102280206A CN102280206A CN2011101417032A CN201110141703A CN102280206A CN 102280206 A CN102280206 A CN 102280206A CN 2011101417032 A CN2011101417032 A CN 2011101417032A CN 201110141703 A CN201110141703 A CN 201110141703A CN 102280206 A CN102280206 A CN 102280206A
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- tungsten
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- copper alloy
- alloy wire
- copper
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Abstract
The invention provides a method for manufacturing a tungsten-copper alloy wire rod. The method comprises the following steps of: (1) material preparing; (2) pressing; (3) infiltration and sintering; (4) hot forging; (5) annealing; and (6) coreless grinding processing. The tungsten-copper alloy wire rod manufactured with the method has the outstanding characteristics of ultra fineness, over length, the diameter of about generally 3mm, the length almost without limits, simple process, low cost, superior performance and very high practical values; and the purposes of greatly decreasing cost and saving materials can be achieved.
Description
Technical field
The invention belongs to new material manufacturing technology field, be specifically related to a kind of preparation method of tungsten-copper alloy wire rod.
Background technology
Tungsten-copper alloy extensively is used as electrode material, Electronic Packaging and electrical contact material because of the performance of favorable conductive, heat conduction and arc resistant corrosion, as electrode the time, usually require diameter about 3mm, the longer the better for length, in the prior art, the preparation of tungsten copper alloy wire material has two kinds of methods, and the one, adopt isostatic cool pressing equipment to be pressed into the bar that is several times as much as requirement, sinter molding is carried out machining more then; The one, to adopt to be molded into bar, rolling again after the sinter molding, extruding, drawing obtain needed alloy wire at last.Because tungsten-copper alloy is a kind of pseudo-alloy, add high rigidity, the high-melting-point of tungsten at present, make it be difficult to employing and be processed into a material or wire rod with the same drawing of dense material or forging, though machining can, complex process, cost of manufacture are too high, industrial being difficult to born, and therefore is necessary to improve.
Summary of the invention
The technical problem that the present invention solves: a kind of preparation method of tungsten-copper alloy wire rod is provided, has solved the elongated class Tungsten-copper Composites of prior art for preparation method complexity, the problem that cost of manufacture is high.
The technical solution used in the present invention: the preparation method of tungsten-copper alloy wire rod comprises following step:
1) batching, choosing granularity is that 300 purpose tungsten powders and granularity are 400 purpose copper powders, adds a small amount of rear earth element nd again and does additive, gets the tungsten copper mixed powder jointly in mechanical mixture 3-5 hour;
2) compacting is packed the tungsten copper mixed powder in the step 1 in the graphite jig in the mode of high-velocity fluid, gives the percussive pressure pressing pressure simultaneously;
3) melting infiltration sintering together with graphite jig, is placed on the above-mentioned pressed compact that suppresses in the protective atmosphere sintering furnace of hydrogen together, and 1450 ℃-1500 ℃ of control temperature are incubated 1-1.5 hour and carry out sinter molding, places the used copper billet of infiltration simultaneously on the graphite jig top;
4) forge hot is taken out the briquet that sinters from graphite jig, be heated to 960 ℃ in chamber type electric resistance furnace, is incubated 30 minutes, is placed on the warm forming machine then briquet is applied compression, produces hammering;
5) annealing, the wire rod that forge hot is obtained carries out annealing in process, and 850 ℃-950 ℃ of temperature are eliminated machining stress;
6) centerless grinding processing is carried out grinding with the wire rod after the annealing on centerless grinding equipment, to guarantee size and surface quality requirement.
Further, the die cavity diameter of described graphite jig is 10mm.
Further, the gas flow of described hydrogen is 3L/h.
Further, described percussive pressure pressing pressure is 15kg.
The present invention's advantage compared with prior art:
1, wire rod machining deformation amount is big, and the deformation extent of this method is much larger than stretching and roller die drawing;
2, wire rod distortion evenly, material internal is in 3 direction compressive stress states, circumferentially evenly compression can not form breach and crackle because of being out of shape the inhomogeneous material that causes, and wire rod is also less is distorted;
3, required deformation force is little, instrument, die life height;
4, the required actuating force of equipment is less, adopts low power motor as power source, and operating cost is low.
Embodiment
A kind of embodiment of the present invention is described below.
Producing diameter is 3mm, and the tungsten-copper alloy wire rod of length 500mm comprises following step:
1) batching, choosing granularity is that 300 purpose tungsten powders and granularity are 400 purpose copper powders, adds a small amount of rear earth element nd again and does additive, gets the tungsten copper mixed powder jointly in mechanical mixture 3-5 hour;
2) compacting is in the graphite jig of 10mm with the tungsten copper mixed powder in the step 1 with the mode of the high-velocity fluid die cavity diameter of packing into, gives 15kg percussive pressure pressing pressure simultaneously;
3) melting infiltration sintering, with the above-mentioned pressed compact that suppresses together with graphite jig, be placed on together in the protective atmosphere sintering furnace of hydrogen, the gas flow of hydrogen is 3L/h, 1450 ℃-1500 ℃ of control temperature, be incubated 1-1.5 hour and carry out sinter molding, place the used copper billet of infiltration simultaneously on the graphite jig top;
4) forge hot is taken out the briquet that sinters from graphite jig, be heated to 960 ℃ in chamber type electric resistance furnace, is incubated 30 minutes, is placed on the warm forming machine then briquet is applied compression, produces hammering; Suffered stress state is a three-dimensional compressive stress during forge hot, and three-dimensional compressive stress can improve material plasticity, and tension stress then makes plasticity reduce, and it is highly beneficial that this forges normal stress characteristics low-plasticity nonferrous metal wire rod lower to output, that added value is higher.On technology, have the multidirectional characteristics that forge with pulse that forge concurrently, the processing capacity of each hammering is smaller, turned blank all is subjected to being evenly distributed on the compression that makes progress in week at every turn, thereby defectives such as the pore of elimination turned blank inside, cavity, broken thick crystal grain, change the institutional framework of material, and this has not only been avoided a large amount of wastes of material, when reducing the tungsten-copper alloy diameter, improve the density and the intensity of tungsten-copper alloy greatly, improve its conductivity by the hole of eliminating in the tungsten-copper alloy simultaneously.
5) annealing, the wire rod that forge hot is obtained carries out annealing in process, and 900 ℃-950 ℃ of temperature are eliminated the machining stress that produces in the blank course of processing, reduce manufacturing deficiency, improve lumber recovery;
6) at last with the about 3.3mm of the diameter that sinters, length is that the thin rod of 510mm is ground to diameter 3mm on centreless grinding machine external, and the wire rod that the surface reaches 1.5 fineness gets final product.
Adopt the tungsten-copper alloy wire rod of this method preparation, diameter about 3mm, length almost without limits, and technology is simple, with low cost, superior performance.
The foregoing description is preferred embodiment of the present invention, is not to be used for limiting the scope of the present invention, so all equivalences of being done with the described content of claim of the present invention change, all should be included within the claim scope of the present invention.
Claims (4)
1. the preparation method of tungsten-copper alloy wire rod is characterized in that comprising following step:
1) batching, choosing granularity is that 300 purpose tungsten powders and granularity are 400 purpose copper powders, adds a small amount of rear earth element nd again and does additive, gets the tungsten copper mixed powder jointly in mechanical mixture 3-5 hour;
2) compacting is packed the tungsten copper mixed powder in the step 1 in the graphite jig in the mode of high-velocity fluid, gives the percussive pressure pressing pressure simultaneously;
3) melting infiltration sintering together with graphite jig, is placed on the above-mentioned pressed compact that suppresses in the protective atmosphere sintering furnace of hydrogen together, and 1450 ℃-1500 ℃ of control temperature are incubated 1-1.5 hour and carry out sinter molding, places the used copper billet of infiltration simultaneously on the graphite jig top;
4) forge hot is taken out the briquet that sinters from graphite jig, be heated to 960 ℃ in chamber type electric resistance furnace, is incubated 30 minutes, is placed on the warm forming machine then briquet is applied compression, produces hammering;
5) annealing, the wire rod that forge hot is obtained carries out annealing in process, and 850 ℃-950 ℃ of temperature are eliminated machining stress;
6) centerless grinding processing is carried out grinding with the wire rod after the annealing on centerless grinding equipment, to guarantee size and surface quality requirement.
2. the preparation method of tungsten-copper alloy wire rod according to claim 1 is characterized in that: the die cavity diameter of described graphite jig is 10mm.
3. the preparation method of tungsten-copper alloy wire rod according to claim 1 is characterized in that: the gas flow of described hydrogen is 3L/h.
4. the preparation method of tungsten-copper alloy wire rod according to claim 1 is characterized in that: described percussive pressure pressing pressure is 15kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101417032A CN102280206A (en) | 2011-05-30 | 2011-05-30 | Method for manufacturing tungsten-copper alloy wire rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101417032A CN102280206A (en) | 2011-05-30 | 2011-05-30 | Method for manufacturing tungsten-copper alloy wire rod |
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| Publication Number | Publication Date |
|---|---|
| CN102280206A true CN102280206A (en) | 2011-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2011101417032A Pending CN102280206A (en) | 2011-05-30 | 2011-05-30 | Method for manufacturing tungsten-copper alloy wire rod |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103409676A (en) * | 2013-07-26 | 2013-11-27 | 河南理工大学 | Method for improving heat conductivity of tungsten copper alloy |
| CN105344741A (en) * | 2015-12-02 | 2016-02-24 | 芜湖楚江合金铜材有限公司 | Copper alloy wire with excellent processing plasticity and processing technology of copper alloy wire |
-
2011
- 2011-05-30 CN CN2011101417032A patent/CN102280206A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103409676A (en) * | 2013-07-26 | 2013-11-27 | 河南理工大学 | Method for improving heat conductivity of tungsten copper alloy |
| CN105344741A (en) * | 2015-12-02 | 2016-02-24 | 芜湖楚江合金铜材有限公司 | Copper alloy wire with excellent processing plasticity and processing technology of copper alloy wire |
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Application publication date: 20111214 |