CN101648313A - Nozzle made of composite material for plasma welding guns and cutting guns and manufacturing method thereof - Google Patents
Nozzle made of composite material for plasma welding guns and cutting guns and manufacturing method thereof Download PDFInfo
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- CN101648313A CN101648313A CN200810118428A CN200810118428A CN101648313A CN 101648313 A CN101648313 A CN 101648313A CN 200810118428 A CN200810118428 A CN 200810118428A CN 200810118428 A CN200810118428 A CN 200810118428A CN 101648313 A CN101648313 A CN 101648313A
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Abstract
The invention discloses a nozzle made of a composite material for plasma welding guns and cutting guns and a manufacturing method thereof. The nozzle made of the composite material comprises a matrixand a nozzle body, wherein the nozzle body is a cylindrical hole, and is arranged at the front end of the matrix; and the matrix is molded by the composite material, and the front end of the matrix made of the composite material is provided with the nozzle body. The manufacturing method thereof comprises the steps: placing 30 to 40 weight percent of carbon powder, 5 to 10 weight percent of chromium powder, 40 to 50 weight percent of silicon carbide powder, 5 to 15 weight percent of titanium carbide powder and 5 to 15 weight percent of boron carbide into a ball-milling tank filled with anhydrous ethanol for mixing, ballmilling and drying, wherein the average particle size of the powder is less than 10 mum; performing pressurizing forming and sintering on the dried mixed powder; performing the cutting of a formed body and the shape processing of the nozzle matrix after the sintering; and ensuring that the front end of the nozzle matrix which is subjected to shape processing is provided with the nozzle body to manufacture the nozzle made of the composite material for the plasma welding guns and cutting guns. The nozzle has the advantages of resisting high temperature and burning loss,effectively preventing the plasma double-arc phenomenon from being produced, improving the quality and efficiency of welding and cutting, and also having simple manufacturing process, low cost, longservice life and the like.
Description
Technical field
The present invention relates to the nozzle of welding gun and cutting gun, relate in particular to a kind of high temperature resistant, anti-scaling loss performance that has, can effectively prevent to produce the plasma double arcing, thereby improve welding and the plasma gun of cut quality and the composite nozzle and the method for making of cutting gun.
Background technology
The nozzle of plasma gun and cutting gun is one of main consumable part of plasma (welding) torch and cutting gun, and its structure, quality are directly connected to the quality and the production efficiency of plasma welding and cutting.Generally, as shown in Figure 1, existing nozzle generally adopts fine copper and copper alloy to be processed into the matrix 1 of nozzle, is drilled with nozzle body 11 in matrix 1 end again.Assembling the defective that this nozzle exists at plasma gun and cutting gun is, when carrying out plasma welding and cutting operation, plasma arc begins from setting up the pilot arc of a moment between electrode and the nozzle, electric arc is transferred on the workpiece by the duct on the nozzle then, the nozzle duct is a cylinder bore with certain-length, it not only has the effect of raising to the arc column compression, and the energy density and the temperature of plasma arc have also been improved simultaneously, but, in the course of the work, because the energy density of plasma arc is too big, after can making a part of electric arc arrive workpiece, turn back to the head of nozzle again, cause the generation of double arcing, especially when operating current is big, double arcing can be even more serious, and high-temperature electric arc is inevitable like this burns out nozzle rapidly, has destroyed the stability of plasma arc simultaneously, not only reduced the service life of nozzle, and the welding of plasma arc and cutting performance are descended.Therefore, in welding and cutting process, need frequently to change nozzle, force welding and cutting process to interrupt, cause inevitably to occur a plurality of contacts in the continuous weld, yet this contact does not allow to exist in requiring high quality welding and cutting structure.In addition, owing to the as a whole structure of this nozzle, in welding and cutting process,, therefore cause great waste and cause welding and the cutting cost increase if the nozzle-end scaling loss just means that nozzle is that integral body is scrapped.Moreover prior art is produced the nozzle that uses can not guarantee higher striking rate, and the nozzle radiating effect is relatively poor, thereby also influences the service life of nozzle, and therefore, the plasma gun of development high life and the nozzle of cutting gun are very important.
Summary of the invention
Main purpose of the present invention is to overcome the above-mentioned shortcoming that existing product exists, and provide the composite nozzle and the method for making of a kind of plasma gun and cutting gun, this nozzle can high temperature resistant, anti-scaling loss, effectively prevention produces the plasma double arcing, improve the quality and the efficient of welding and cutting, also have advantages such as manufacturing process is simple, cost is low, long service life.
The objective of the invention is to realize by following technical scheme.
The composite nozzle of plasma gun of the present invention and cutting gun comprises matrix and nozzle body, and this nozzle body is cylinder bodily form hole, and it is opened in the front end of matrix; It is characterized in that described matrix is formed by composite material forming, the front end of this matrices of composite material is offered nozzle body.
The composite nozzle of aforesaid plasma gun and cutting gun, wherein composite is with carbon dust, chromium powder, carborundum, titanium carbide and boron carbide the material that in alcohol solvent mixing and ball milling after oven dry, sintering form of particle mean size less than 10 μ m, wherein the percentage by weight of carbon dust is 30 to 40%, the percentage by weight of chromium powder is 5 to 10%, the percentage by weight of carborundum is 40 to 50%, the percentage by weight of titanium carbide is 5 to 15%, boron carbide percentage by weight be 5 to 15%.
The composite nozzle of aforesaid plasma gun and cutting gun, wherein ethanol is absolute ethyl alcohol; The time of described mixing and ball milling is 12 ± 1h, and temperature is 20 ± 5 ℃; Described bake out temperature is 150 ± 10 ℃, drying time 3 ± 0.5h.
The method for making of the composite nozzle of plasma gun of the present invention and cutting gun, it is characterized in that, (1) taking by weighing particle mean size respectively is that the following percentage by weight of 10 μ m is 30 to 40% carbon dust, 5 to 10% chromium powder, 40 to 50% carborundum powders, 5 to 15% carbonized titanium powder and 5 to 15% boron carbide powder, be placed on mixing and ball milling 12 ± 1h in the ball grinder with absolute ethyl alcohol, the ball milling temperature is controlled at 20 ± 5 ℃; (2) with the mixed powder after grinding oven dry, it is 150 ± 10 ℃ that bake out temperature is controlled at, drying time 3 ± 0.5h; (3) dried mixed powder is placed on extrusion forming in the mould; (4) formed body is placed in the hot pressing furnace, under argon shield atmosphere, 1900 to 2200 ℃ of control temperature, pressure 45 ± 10MPa, sintering 2 is to 3h; (5) formed body behind the sintering is cut and the nozzle matrix sharp processing; (6) offer nozzle body at the nozzle matrix leading section of finishing sharp processing, this nozzle body is the cylinder bodily form hole that is drilled with, its aperture is below the 2mm, the endoporus cylindricity is below the 0.06mm, inner bore surface roughness mean value is 1.35 ± 0.05 μ m, makes the composite nozzle of plasma gun and cutting gun.
The composite nozzle of plasma gun of the present invention and cutting gun comprises matrix and nozzle body, and this nozzle body is cylindrical body opening, and it is opened in the front end of matrix; It is characterized in that described matrix front end is inlayed the terminal by composite material forming, nozzle body is offered in the end of this composite terminal.
The composite nozzle of aforesaid plasma gun and cutting gun, wherein composite is with carbon dust, chromium powder, carborundum, titanium carbide and boron carbide the material that in alcohol solvent mixing and ball milling after oven dry form of particle mean size less than 10 μ m, wherein the percentage by weight of carbon dust is 30 to 40%, the percentage by weight of chromium powder is 5 to 10%, the percentage by weight of carborundum is 40 to 50%, the percentage by weight of titanium carbide is 5 to 15%, and the percentage by weight of boron carbide is 5 to 15%.
The composite nozzle of aforesaid plasma gun and cutting gun, wherein ethanol is absolute ethyl alcohol; The time of described mixing and ball milling is 12 ± 1h, and temperature is 20 ± 5 ℃; Described bake out temperature is 150 ± 10 ℃, drying time 3 ± 0.5h.
The method for making of the composite nozzle of plasma gun of the present invention and cutting gun, it is characterized in that, (1) taking by weighing particle mean size respectively is that the following percentage by weight of 10 μ m is 30 to 40% carbon dust, 5 to 10% chromium powder, 40 to 50% carborundum powders, 5 to 15% carbonized titanium powder and 5 to 15% boron carbide powder, placement has mixing and ball milling 12 ± 1h in the ball grinder of ethanol, and the ball milling temperature is controlled at 20 ± 5 ℃; (2) with the mixed powder after grinding oven dry, it is 150 ± 10 ℃ that bake out temperature is controlled at, drying time 3 ± 0.5h; (3) dried mixed powder is placed on extrusion forming in the mould; (4) formed body is placed in the hot pressing furnace, under argon shield atmosphere, 1900 to 2200 ℃ of control temperature, pressure 45 ± 10MPa, sintering 2 is to 3h; (5) formed body behind the sintering is cut and the terminal sharp processing; (6) the composite terminal that will finish sharp processing is inlayed the nozzle matrix front end; (7) offer nozzle body in the composite terminal ends, this nozzle body is the cylinder bodily form hole that is drilled with, and its aperture is below the 2mm, and the endoporus cylindricity is below the 0.06mm, inner bore surface roughness mean value is 1.35 ± 0.05 μ m, makes the composite nozzle of plasma gun and cutting gun.
The composite nozzle of plasma gun of the present invention and cutting gun and the beneficial effect of method for making, simple and reasonable, manufacturing process is simple, cost is low, and the main component of the composite of use is to be convenient to mass-produced carbon (C), chromium (Cr) material and carborundum (SiC), titanium carbide (TiC) and boron carbide (B
4C) ceramic particle, the source is wide and cost is low.The carbon material has good electrical conductivity, thermal conductivity and resistance to sudden heating, and is easy to advantages such as machine-shaping; Ceramic material has high-melting-point, high rigidity, high strength, wearability, the characteristics of non-oxidizability and low-resistivity, material with carbon element and ceramic material are carried out compound, prepare and comprehensively to have the carbon/ceramic composite of above-mentioned two kinds of material advantages, thereby improved combination properties such as high temperature resistant, anti-oxidant, the heat shock resistance of plasma gun and cutting gun nozzle, wear-resisting and electric conductivity.Owing to improved the performance of plasma gun and cutting gun nozzle, when making plasma gun and cutting gun construction operation, can effectively prevent to produce the plasma double arcing, improve the quality and the efficient of welding and cutting, also prolonged the service life of nozzle simultaneously.
Description of drawings:
Fig. 1 is existing ion welding gun and cutting gun nozzle arrangements cross-sectional schematic.
Fig. 2 is the composite nozzle one example structure cutaway view of ion welding gun of the present invention and cutting gun.
Fig. 3 is another example structure cutaway view of composite nozzle of ion welding gun of the present invention and cutting gun.
Major label description in figure
Prior art part: the matrix of 1 bronze medal or copper alloy material, 11 nozzle bodies;
Part of the present invention: the terminal of the matrix of 2 composites, 21 composites, 3 nozzle bodies.
The specific embodiment
Consult shown in Figure 2, the composite nozzle of ion welding gun of the present invention and cutting gun, it comprises matrix and nozzle body, this nozzle body is cylinder bodily form hole, it is opened in the front end of matrix; This matrix is formed by composite material forming, and the front end of this matrices of composite material 2 is offered nozzle body 3.
The composite nozzle of plasma gun of the present invention and cutting gun, wherein, this composite is with carbon dust, chromium powder, carborundum, titanium carbide and boron carbide the material that in alcohol solvent mixing and ball milling after oven dry, sintering form of particle mean size less than 10 μ m, wherein the percentage by weight of carbon dust is 30 to 40%, the percentage by weight of chromium powder is 5 to 10%, the percentage by weight of carborundum is 40 to 50%, the percentage by weight of titanium carbide is 5 to 15%, boron carbide percentage by weight be 5 to 15%; This ethanol is absolute ethyl alcohol; The time of mixing and ball milling is 12 ± 1h, and temperature is 20 ± 5 ℃; Bake out temperature is 150 ± 10 ℃, drying time 3 ± 0.5h.
The present invention as shown in Figure 2 plasma gun and the method for making of the composite nozzle of cutting gun be, (1) taking by weighing particle mean size respectively is that the following percentage by weight of 10 μ m is 30 to 40% carbon dust, 5 to 10% chromium powder, 40 to 50% carborundum powders, 5 to 15% carbonized titanium powder and 5 to 15% boron carbide powder, be placed on mixing and ball milling 12 ± 1h in the ball grinder with absolute ethyl alcohol, the ball milling temperature is controlled at 20 ± 5 ℃; (2) with the mixed powder after grinding oven dry, it is 150 ± 10 ℃ that bake out temperature is controlled at, drying time 3 ± 0.5h; (3) dried mixed powder is placed on extrusion forming in the mould; (4) formed body is placed in the hot pressing furnace, under argon shield atmosphere, 1900 to 2200 ℃ of control temperature, pressure 45 ± 10MPa, sintering 2 is to 3h; (5) formed body behind the sintering is cut and the nozzle matrix sharp processing; (6) offer nozzle body at the nozzle matrix leading section of finishing sharp processing, this nozzle body is the cylinder bodily form hole that is drilled with, its aperture is below the 2mm, the endoporus cylindricity is below the 0.06mm, inner bore surface roughness mean value is 1.35 ± 0.05 μ m, makes the composite nozzle of plasma gun and cutting gun.
Consult shown in Figure 3ly, the composite nozzle of plasma gun of the present invention and cutting gun comprises matrix 1 and nozzle body, and this nozzle body is cylindrical body opening, and it is opened in the front end of matrix; This matrix 1 front end is inlayed the terminal 21 by composite material forming, and nozzle body 3 is offered in the end of this composite terminal 21.
The composite nozzle of plasma gun of the present invention and cutting gun, wherein, this composite is with carbon dust, chromium powder, carborundum, titanium carbide and boron carbide the material that in alcohol solvent mixing and ball milling after oven dry form of particle mean size less than 10 μ m, wherein the percentage by weight of carbon dust is 30 to 40%, the percentage by weight of chromium powder is 5 to 10%, the percentage by weight of carborundum is 40 to 50%, and the percentage by weight of titanium carbide is 5 to 15%, and the percentage by weight of boron carbide is 5 to 15%; This ethanol is absolute ethyl alcohol; The time of described mixing and ball milling is 12 ± 1h, and temperature is 20 ± 5 ℃; Described bake out temperature is 150 ± 10 ℃, drying time 3 ± 0.5h.
The present invention as shown in Figure 3 plasma gun and the method for making of the composite nozzle of cutting gun be, (1) taking by weighing particle mean size respectively is that the following percentage by weight of 10 μ m is 30 to 40% carbon dust, 5 to 10% chromium powder, 40 to 50% carborundum powders, 5 to 15% carbonized titanium powder and 5 to 15% boron carbide powder, placement has mixing and ball milling 12 ± 1h in the ball grinder of ethanol, and the ball milling temperature is controlled at 20 ± 5 ℃; (2) with the mixed powder after grinding oven dry, it is 150 ± 10 ℃ that bake out temperature is controlled at, drying time 3 ± 0.5h; (3) dried mixed powder is placed on extrusion forming in the mould; (4) formed body is placed in the hot pressing furnace, under argon shield atmosphere, 1900 to 2200 ℃ of control temperature, pressure 45 ± 10MPa, sintering 2 is to 3h; (5) formed body behind the sintering is cut and the terminal sharp processing; (6) the composite terminal that will finish sharp processing is inlayed the nozzle matrix front end; (7) offer nozzle body in the composite terminal ends, this nozzle body is the cylinder bodily form hole that is drilled with, and its aperture is below the 2mm, and the endoporus cylindricity is below the 0.06mm, inner bore surface roughness mean value is 1.35 ± 0.05 μ m, makes the composite nozzle of plasma gun and cutting gun.
Embodiment one:
Taking by weighing particle mean size respectively is 300g carbon dust, 50g chromium, 450g carborundum powder, 100g carbonized titanium powder, the 100g boron carbide powder of 8 μ m, is placed on mixing and ball milling 12h in the ball grinder that is built-in with the pure level of 150g analysis absolute ethyl alcohol; With the mixed powder oven dry, bake out temperature is controlled at 150 ℃, drying time 3h; Under the pressure of 30MPa, in columnar mould, be shaped to barred body then; Barred body with moulding places in the hot pressing furnace again, under argon shield atmosphere, and 2000 ℃ of control temperature, pressure 45MPa, sintering 2.5h; Behind the sintering, adopt machine-tooled method to cut sharp processing with nozzle matrix 2, shape as shown in Figure 2 the gained bar; At last, adopt high-speed drilling technology to offer the nozzle body 3 that is cylinder bodily form hole in nozzle matrix 2 ends of finishing sharp processing, as shown in Figure 2; The aperture of this nozzle body 3 is 2mm, and the endoporus cylindricity is 0.05mm, and inner bore surface roughness mean value is 1.35 μ m, makes the composite nozzle of plasma gun of the present invention and cutting gun, as shown in Figure 2.
Use the plasma gun of present embodiment and the composite nozzle of cutting gun to carry out the technology examination at the scene, current interruption or double arcing do not appear in plasma welding and cutting operation process ionic medium arc flameholding; Weld seam is level and smooth, does not have tangible macroscopical weld defect; Otch is clean and tidy, and it is residual not have the cutting chip; Welding/cut quality is good, the situation of the serious scaling loss of nozzle does not take place yet, only need change primary nozzle average per 2 working days, under the identical operation condition, if adopt the nozzle of common copper and Cu alloy material preparation, need change 5 to 7 times nozzle then per 1 working day, therefore enforcement of the present invention can be enhanced productivity greatly.
Embodiment two:
Taking by weighing particle mean size respectively is 300g carbon dust, 50g chromium, 450g carborundum powder, 100g carbonized titanium powder, the 100g boron carbide powder of 10 μ m, is placed on mixing and ball milling 12h in the ball grinder that is built-in with the pure level of 150g analysis absolute ethyl alcohol; With the mixed powder oven dry, bake out temperature is controlled at 150 ℃, drying time 3h then; Under the pressure of 30MPa, in columnar mould, be shaped to barred body; Barred body with moulding places in the hot pressing furnace again, under argon shield atmosphere, and 2200 ℃ of control temperature, pressure 45MPa, sintering 2.5h; Behind the sintering, with the sharp processing that the gained bar adopts machine-tooled method to cut the composite material forming terminal of inlaying with the nozzle matrix front end, composite terminal shape as shown in Figure 3; Utilize hot mosaic technology to be embedded in the front end of copper alloy nozzle matrix the composite terminal that processes then; At last, adopt high-speed drilling technology to offer the nozzle body 3 that is cylinder bodily form hole in the end of finishing the composite terminal that heat inlays, as shown in Figure 3; The aperture of this nozzle body 3 is 2mm, and the endoporus cylindricity is 0.05mm, and the internal surface of hole roughness average is 1.35 μ m, makes the composite nozzle of plasma gun of the present invention and cutting gun, as shown in Figure 3.
Use the plasma gun of present embodiment and the composite nozzle of cutting gun to carry out the technology examination at the scene, plasma welding and cutting operation process ionic medium arc flameholding, no current interruption and tangible double arcing; Weld seam is level and smooth, does not have tangible macroscopical weld defect; Otch is clean and tidy, and it is residual not cut chip; Welding/cut quality is good, and the situation of the serious scaling loss of nozzle does not take place; Only need change primary nozzle average per 2 working days, under the identical operation condition, if adopt the nozzle of common copper and Cu alloy material preparation, need change 5 to 7 times nozzle then per 1 working day, and therefore enforcement of the present invention can be enhanced productivity greatly.
Bore process that relates in the embodiment of the invention and hot mosaic technology are prior art, and the equal prior art not of the content that does not describe among the embodiment, so, give unnecessary details no longer in detail.
Because carbon graphite material exists mechanical strength low, porosity height, shortcoming such as dependability is relatively poor is difficult to satisfy the demand of preparation plasma gun and cutting gun nozzle material.The present invention combines carbon materials and ceramic material and makes carbon/ceramic composite, can bring into play the advantage of this two classes material property complementation, prepare the mechanical strength height, high temperature resistant, corrosion-resistant, mar proof is good, anti-oxidant, the anti-thermal shock ability is strong, and possesses the high-performance engineering material of good conductive thermal conductivity, machinability and self-lubricating ability, adopt this composite to make the nozzle of plasma gun and cutting gun, overcome prior art and adopt the plasma gun of copper or Cu alloy material making and the defective that the cutting gun nozzle exists.
One of embodiment provided by the invention is that the body portion with plasma gun and cutting gun nozzle adopts composite to make fully, by the boring method of prior art, is drilled with nozzle body on matrix then.The composite that uses is in preparation process, when carbon granule and ceramic particle ball milling, soft carbon granule is coated on the ceramic particle surface of hard, after the sinter molding, has formed the ceramic particle disperse and has been distributed in heterogeneous microstructure in the carbon base body.The ceramic material phase of disperseization has been improved the intensity of carbon base body, has improved hardness, wearability, heat-resisting quantity and the non-oxidizability of composite.Simultaneously, the carbon component in the composite can play lubricated effect when nozzle and workpiece friction, thereby has increased the antifriction performance of composite; Owing to there is the continuous phase of carbon component in the microstructure, therefore kept the advantage of material with carbon element satisfactory electrical conductivity, thermal conductivity and thermal shock resistance, react to each other with ceramic material, formed thermal conductivity, the good cenotype of electric conductivity.When high temperature, ceramic material in the composite and oxygen reaction have formed the diaphragm of oxide, thereby have stoped the further oxidation of composite inner, thereby have the good high-temperature antioxygenic property.When the present invention punches in machined, adopt high speed rotary drilling technology, make plasma nozzle body aperture inner surface and nozzle outer surface level and smooth.
Two of embodiment provided by the invention is that the matrix leading section of plasma gun and cutting gun nozzle is inlayed the composite terminal, and the boring method by prior art is then inlayed on the composite terminal at the matrix leading section and to be drilled with nozzle body.Damascene process technology, use the hot method for embedding of prior art, this method has been utilized thermal coefficient of expansion poor of composite and copper or Cu alloy material, and finish composite terminal inlaying on copper or Cu alloy material nozzle matrix, adopt the plasma gun of this embodiment preparation and the composite nozzle of cutting gun, the advantage and the effect that can have one of embodiment equally are so no longer give unnecessary details.
The nozzle of plasma gun of the present invention and cutting gun composite and the advantage of method for making are: (1) nozzle has higher intensity and hardness, favorable conductive, heat conduction, resistance to high temperature oxidation, anti-thermal shock and antifriction characteristic, long service life, through using the contrast experiment, the result shows that its service life is than about 5 times of plain nozzle raisings.When (2) plasma gun and cutting gun use nozzle of the present invention to carry out operation, the plasma arc flameholding, weld seam and otch are level and smooth, and welding and cut quality are better.Because composite nozzle-end heat resistance is better, therefore the plasma arc that reflects up from workpiece can be suppressed or eliminate, thereby effectively avoids producing double arcing.(3) because composite nozzle of the present invention can effectively be avoided the nozzle burning phenomenon that liquid metal splashes and causes in double arcing, the reflection that suppresses electric arc and the molten bath, nozzle scaling loss degree can obviously reduce, thereby prolonged service life of nozzle, significantly reduce owing to change and debug the time of nozzle, the operating efficiency of plasma welding and cutting gun is significantly improved.(4) owing to adopt the copper of the cheap all or part of alternative high price of composite and copper alloy as the material of making nozzle, so manufacturing cost is low greatly, and structure of nozzle is simple, is easy to processing and manufacturing, helps applying.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (8)
1, the composite nozzle of a kind of plasma gun and cutting gun comprises matrix and nozzle body, and this nozzle body is cylinder bodily form hole, and it is opened in the front end of matrix; It is characterized in that described matrix is formed by composite material forming, the front end of this matrices of composite material is offered nozzle body.
2, the composite nozzle of plasma gun according to claim 1 and cutting gun, it is characterized in that, described composite is with carbon dust, chromium powder, carborundum, titanium carbide and boron carbide the material that in alcohol solvent mixing and ball milling after oven dry, sintering form of particle mean size less than 10 μ m, wherein the percentage by weight of carbon dust is 30 to 40%, the percentage by weight of chromium powder is 5 to 10%, the percentage by weight of carborundum is 40 to 50%, the percentage by weight of titanium carbide is 5 to 15%, boron carbide percentage by weight be 5 to 15%.
3, the composite nozzle of plasma gun according to claim 1 and cutting gun is characterized in that, described ethanol is absolute ethyl alcohol; The time of described mixing and ball milling is 12 ± 1h, and temperature is 20 ± 5 ℃; Described bake out temperature is 150 ± 10 ℃, drying time 3 ± 0.5h.
4, the method for making of the composite nozzle of a kind of plasma gun as claimed in claim 1 and cutting gun, it is characterized in that, (1) taking by weighing particle mean size respectively is that the following percentage by weight of 10 μ m is 30 to 40% carbon dust, 5 to 10% chromium powder, 40 to 50% carborundum powders, 5 to 15% carbonized titanium powder and 5 to 15% boron carbide powder, be placed on mixing and ball milling 12 ± 1h in the ball grinder with absolute ethyl alcohol, the ball milling temperature is controlled at 20 ± 5 ℃; (2) with the mixed powder after grinding oven dry, it is 150 ± 10 ℃ that bake out temperature is controlled at, drying time 3 ± 0.5h; (3) dried mixed powder is placed on extrusion forming in the mould; (4) formed body is placed in the hot pressing furnace, under argon shield atmosphere, 1900 to 2200 ℃ of control temperature, pressure 45 ± 10MPa, sintering 2 is to 3h; (5) formed body behind the sintering is cut and the nozzle matrix sharp processing; (6) offer nozzle body at the nozzle matrix leading section of finishing sharp processing, this nozzle body is the cylinder bodily form hole that is drilled with, its aperture is below the 2mm, the endoporus cylindricity is below the 0.06mm, inner bore surface roughness mean value is 1.35 ± 0.05 μ m, makes the composite nozzle of plasma gun and cutting gun.
5, the composite nozzle of a kind of plasma gun and cutting gun comprises matrix and nozzle body, and this nozzle body is cylindrical body opening, and it is opened in the front end of matrix; It is characterized in that described matrix front end is inlayed the terminal by composite material forming, nozzle body is offered in the end of this composite terminal.
6, the composite nozzle of plasma gun according to claim 5 and cutting gun, it is characterized in that, described composite is with carbon dust, chromium powder, carborundum, titanium carbide and boron carbide the material that in alcohol solvent mixing and ball milling after oven dry form of particle mean size less than 10 μ m, wherein the percentage by weight of carbon dust is 30 to 40%, the percentage by weight of chromium powder is 5 to 10%, the percentage by weight of carborundum is 40 to 50%, the percentage by weight of titanium carbide is 5 to 15%, and the percentage by weight of boron carbide is 5 to 15%.
7, the composite nozzle of plasma gun according to claim 5 and cutting gun is characterized in that, described ethanol is absolute ethyl alcohol; The time of described mixing and ball milling is 12 ± 1h, and temperature is 20 ± 5 ℃; Described bake out temperature is 150 ± 10 ℃, drying time 3 ± 0.5h.
8, the method for making of the composite nozzle of a kind of plasma gun as claimed in claim 5 and cutting gun, it is characterized in that, (1) taking by weighing particle mean size respectively is that the following percentage by weight of 10 μ m is 30 to 40% carbon dust, 5 to 10% chromium powder, 40 to 50% carborundum powders, 5 to 15% carbonized titanium powder and 5 to 15% boron carbide powder, placement has mixing and ball milling 12 ± 1h in the ball grinder of ethanol, and the ball milling temperature is controlled at 20 ± 5 ℃; (2) with the mixed powder after grinding oven dry, it is 150 ± 10 ℃ that bake out temperature is controlled at, drying time 3 ± 0.5h; (3) dried mixed powder is placed on extrusion forming in the mould; (4) formed body is placed in the hot pressing furnace, under argon shield atmosphere, 1900 to 2200 ℃ of control temperature, pressure 45 ± 10MPa, sintering 2 is to 3h; (5) formed body behind the sintering is cut and the terminal sharp processing; (6) the composite terminal that will finish sharp processing is inlayed the nozzle matrix front end; (7) offer nozzle body in the composite terminal ends, this nozzle body is the cylinder bodily form hole that is drilled with, and its aperture is below the 2mm, and the endoporus cylindricity is below the 0.06mm, inner bore surface roughness mean value is 1.35 ± 0.05 μ m, makes the composite nozzle of plasma gun and cutting gun.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810118428A CN101648313A (en) | 2008-08-15 | 2008-08-15 | Nozzle made of composite material for plasma welding guns and cutting guns and manufacturing method thereof |
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| CN200810118428A CN101648313A (en) | 2008-08-15 | 2008-08-15 | Nozzle made of composite material for plasma welding guns and cutting guns and manufacturing method thereof |
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| CN101648313A true CN101648313A (en) | 2010-02-17 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103143826A (en) * | 2013-03-19 | 2013-06-12 | 安徽西锐重工科技有限公司 | Spray nozzle of plasma cutting torch |
| CN103752219A (en) * | 2013-11-06 | 2014-04-30 | 溧阳市江大技术转移中心有限公司 | Manufacturing method of boron carbide firearm nozzle |
| CN103752217A (en) * | 2013-11-06 | 2014-04-30 | 溧阳市江大技术转移中心有限公司 | Manufacturing method of firearm nozzle |
| CN112676684A (en) * | 2020-12-30 | 2021-04-20 | 佛山科学技术学院 | Nozzle of plasma spray welding gun |
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2008
- 2008-08-15 CN CN200810118428A patent/CN101648313A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103143826A (en) * | 2013-03-19 | 2013-06-12 | 安徽西锐重工科技有限公司 | Spray nozzle of plasma cutting torch |
| CN103752219A (en) * | 2013-11-06 | 2014-04-30 | 溧阳市江大技术转移中心有限公司 | Manufacturing method of boron carbide firearm nozzle |
| CN103752217A (en) * | 2013-11-06 | 2014-04-30 | 溧阳市江大技术转移中心有限公司 | Manufacturing method of firearm nozzle |
| CN112676684A (en) * | 2020-12-30 | 2021-04-20 | 佛山科学技术学院 | Nozzle of plasma spray welding gun |
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