The method of obtaining a composite material based pseudoplane copper-tungsten

 

(57) Abstract:

Use. For the manufacture of electrodes for electroerosive processing. The inventive method for obtaining composite material on the basis of pseudoplane copper-tungsten, comprising compressing the blend containing tungsten and subsequent heat treatment, characterized in that the extrusion is subjected to the charge, additionally comprising copper-containing component, at the same time as tungsten and copper components used products recovery and plateresco synthesis flotation waste tungsten and copper-bearing materials in the following ratio of components in the mixture ( wt. %): product plateresco synthesis of tungsten-containing flotation waste 10-25; product plateresco synthesis of tungsten-containing flotation waste 10-25; the reduction product of copper-bearing waste flotation - rest. 1 C.p. f-crystals, 1 table.

The invention relates to powder metallurgy and, in particular, for manufacturing electrodes for EDM processing.

Known methods of manufacturing articles made of composite material based on tungsten-copper. Methods include using in to ogechukwu scheme and increases the cost of the process ( Application Japan N 58-53058, N 63-114221).

A method of obtaining a composite material containing (wt.) 50 C and 50 W, whereby the frame of tungsten is subjected to impregnation with copper at 1400oC (EDM Electrodes made of composite materials for wire EDM machines: guidelines/Leviticus M. L. Glagolev N. N. M anims, 1988, S. 23).

The main disadvantages of this method are:

the necessity of first obtaining the original expensive components on an advanced technological scheme;

increased energy consumption in the process due to the high temperature of 1400oC for sintering tungsten frame and additional energy consumption for melting copper for impregnation of the frame.

The basis of the invention is to realize such a method of producing material that would improve its performance, reducing the cost of the process, including through the use of as components of the mixture of products of processing tungsten and copper waste and improve the environment by increasing the utilization of mineral raw materials.

The task dostigaetsja followed by heat treatment, according to the invention, the pressing is subjected to a mixture containing tungsten and copper components, which use the products of recovery and plateresco synthesis flotation waste tungsten and copper raw materials, at the following ratio of components in the mixture, wt.

Product recovery tungsten-containing flotation waste. 10-25

Product plateresco synthesis of tungsten-containing flotation waste. - 10-25

The reduction product of copper flotation waste. Else

At the same time as product recovery tungsten-containing waste flotation using a powder containing, by weight. tungsten 86-87; tungsten 8 to 8.5; a silicon oxide 2,5 3; iron 2 2,5; calcium oxide of 0.2 - 0.5. The quality of the product plateresco synthesis of tungsten-containing waste flotation using a powder containing, by weight. tungsten carbide with 95.5 to 96.5; iron carbide 2 2,5; silicon carbide 1 1,5; calcium carbide 0.2 to 0.5, and the reduction product of copper flotation waste use powder containing, by weight. copper 82,5 83; calcium oxide 0.5 to 1.0; iron 13,5 14; copper oxide 2.5 to 3.

The advantage of the proposed method lies in the fact that the use of satellitebased flotation waste reduces 2 to 3 times the cost of the material obtained in comparison with the material of the prototype, simplifies the General technological scheme of production of composite material, eliminates the introduction of additives, such as calcium (patent N 62 114221), as they are already contained in the proposed initial products of the charge, and also improves the environment by reducing the volume of hydrometallurgical processing.

The qualitative composition of the charge and the optimal state of the components provides improved physico-chemical and operational properties of a composite material and the electrode-tool from it, namely: the reduction of porosity from 5% to 2% and grain sizes from 5-10 to 1-5 m, the increase in hardness with 120 HB 140 HB, erosion resistance of the electrode tool relative linear wear is reduced from 33% to 30% and the rate of metal removal is almost 1.6 times.

Example. For the implementation of the proposed method used the powders with a particle size less than 50 microns flotation waste tungsten and copper mineral raw materials: tungsten-containing wastes with a content of main components, wt. tungsten 75,0; calcium 1,2; iron 2,1; silicon 1,1; oxygen 20,07; copper-containing waste with a content of main components, wt. copper 56,1; iron 9,24; sulfur 10,56; calcium 0,4; oxygen 16,08 C for 1 h, and the second part was carbimazole in vacuum at a temperature of 1300-1350oC for 1.0 to 1.5 h in the presence of carbon type PM-100. Copper flotation waste was reduced by hydrogen at a temperature of 870oC for 1 h were Thus obtained powder of the following composition, wt.

1) W 86,4; WO38,1; SiO22,8; Fe 2,4; CaO 0,3;

2) WC 96,0; Fe3C 2,3; SiC 1,4; CaC20,3.

3) Cu 82,8; Fe 13,6; CuO 2,8; CaO 0,7.

The charge composition, wt. (respectively):

product recovery tungsten-containing flotation waste 15

product carbidization tungsten-containing waste 15

the reduction product of copper-bearing waste 70

mixed in a centrifugal planetary mill for 5 h, extruded on the installation of hot pressing at a temperature of 1000oC at a pressure of 30 MPa and at a speed of load 5 minutes the resulting material had the composition: W 12,96; WC 14,4; Cu 57,96; WO31,22; CaO 0,045 + 0,5; Fe 0,36 + 9,52; SiO20,42; Fe3C 0,345; CaC20,045; SiC 0,21; CuO 1,96, with a relative density of 97.6% grain size of 1-5 μm (70%), pore size of 1-4 μm, hardness HB 130. The material has been tested as an electrode for electrical discharge machining (EERO) solid alloy VK-8. Relative inpremium 1 made examples 2 to 5 (see table).

1. The method of obtaining a composite material based pseudoplane tungsten-copper, comprising preparing a mixture of copper and tungsten-containing components, extrusion and heat treatment, characterized in that preparing a mixture comprising as tungsten and copper components products recovery and plateresco synthesis flotation waste tungsten and copper-bearing materials in the following ratio of components in the mixture, wt.

Product recovery tungsten-containing flotation waste 10 25

Product plateresco synthesis of tungsten-containing flotation waste 10 25

The reduction product of copper flotation waste the Rest

2. The method according to p. 1, characterized in that the quality of the product recovery tungsten-containing flotation waste use powder containing, by weight.

Tungsten 86 87

The tungsten oxide (WO3) 8 8,5

The silicon oxide 2,5 3,0

Iron 2 2,5

Calcium oxide 0,2 0,5

the quality of the product plateresco synthesis of tungsten-containing flotation waste use powder containing, by weight.

Tungsten carbide with 95.5 to 96.5

Iron carbide (Fe3C) 2 2,5

Silicon carbide 1 1,5
t powder, containing, by weight.

Copper 82,5 83

Iron 15,3 14

The copper oxide 2,5 3,0

Calcium oxide 0,5 1,0,

 

Same patents:

The invention relates to alloys based on copper, intended for the manufacture of moulds, such as moulds for casting metals and parts of the high-temperature reaction alloys

The invention relates to the field of powder metallurgy

The invention relates to powder metallurgy, in particular sintered contact materials based on copper

The invention relates to the field of metallurgy and concerns compositions of alloys based on tungsten, used for the manufacture of rocket nozzles, thermocouple, parts reactors, electric heating elements and bodies glow

The invention relates to metallurgy, in particular to the production of heat-resistant alloys

The invention relates to powder metallurgy, in particular for alloys based on refractory metals for alloying of ferrous and non-ferrous metals

The invention relates to alloys of molybdenum, intended for use as a structural material

The invention relates to metallurgy, in particular the production of alloys of molybdenum, used for the manufacture of products having threaded connections and functioning at high temperatures, for example electrodes
The invention relates to the field of powder metallurgy, in particular to the manufacture of diamond tools by hot pressing

The invention relates to the processing of secondary resources, namely, metal chips, leaf trimmings, wire ropes, etc

The invention relates to the creation of high corrosion and heat - resistant permanent magnets

The invention relates to powder metallurgy and can be used to obtain ferrite products, mainly isotropic barium chloride magnets

The invention relates to the field of powder metallurgy, namely the formation of solid alloys
Up!