CN104972133A - Method for preparing Cu-based SiC composite micro powder for electrode of electric spark tool - Google Patents
Method for preparing Cu-based SiC composite micro powder for electrode of electric spark tool Download PDFInfo
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- CN104972133A CN104972133A CN201510421795.8A CN201510421795A CN104972133A CN 104972133 A CN104972133 A CN 104972133A CN 201510421795 A CN201510421795 A CN 201510421795A CN 104972133 A CN104972133 A CN 104972133A
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Abstract
The invention discloses a method for preparing Cu-based SiC composite micro powder for an electrode of an electric spark tool and belongs to the technical field of electric discharge machining. The method relates to a funnel. The method is characterized in that electroless copper plating and drying are conducted on the surface of SiC particles, so that SiC copper-plated particles are obtained; molten Cu is poured into the funnel, the SiC copper-plated particles are added into a uniform feeder, the SiC copper-plated particles enter a guide pipe evenly by means of a feeding pipe and are blown out of the guide pipe under the constant-speed wind force of a high-pressure nitrogen source, the peripheries of the SiC copper-plated particles are wrapped in the molten Cu, the SiC copper-plated particles drip down from a discharge spout together with the molten Cu, and the SiC copper-plated particles wrapped by the molten Cu are atomized into composite micro powder by means of gas. According to the method, the SiC particles are blown into the molten Cu in a dispersed mode by means of nitrogen, and thus the distribution uniformity of the SiC particles is improved; meanwhile, by increasing the feeding speed of the SiC copper-plated particles, the content of the SiC particles can be flexibly increased, and the electric corrosion resistance can be improved easily.
Description
Technical field
The invention belongs to spark discharge processing technique field, be specifically related to a kind of preparation method of edm tool electrode Cu base SiC composite micro-powder.
Background technology
Because spark technology has the incomparable superiority of other processing method in processing property material, labyrinth and micro-workpiece etc., be obtained propagation and employment gradually in recent years.In the process of spark discharge processing, scrupulously and respectfully changed, gasified, exploded the electrode material of dishing out not only workpiece material candle to be removed, also tool-electrode material candle is removed simultaneously, this just inevitably creates the loss of tool-electrode, and the loss of tool-electrode maps directly on workpiece, affect its formed precision.
In order to improve the formed precision of workpiece, some experts and scholars have dropped into the research to tool-electrode.Wherein, present inventor associate professor Li Li have developed a kind of combination electrode, the electrical erosion resistance attempted by improving electrode can improve the Forming Quality of workpiece, and propose application for a patent for invention to China, its application number is 201410130305.4, and this electrode is SiC and TiB adopting Electroless copper
2micro mist is formed in Copper substrate by electro-deposition, although improve the electrical erosion resistance energy of tool-electrode to a certain extent, SiC and TiB added in electrode
2distribution is also uneven, and addition is also wayward, and these have impact on the serviceability of electrode all to a great extent.
After further research, find to enable the second-phase particulate of interpolation comparatively be evenly distributed in metallic matrix, the preparation of second-phase particulate is the technical problem that first will solve to inventor.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of preparation method of edm tool electrode Cu base SiC composite micro-powder, can improve the distributing homogeneity of second-phase particulate.
For solving the problems of the technologies described above, technical scheme of the present invention is: the preparation method inventing a kind of edm tool electrode Cu base SiC composite micro-powder, comprises funnel, it is characterized in that: step is as follows:
(1) electroless copper: SiC is made the particulate that particle diameter is 3 ~ 5um, carries out electroless copper and drying to SiC microparticle surfaces, obtained SiC copper facing particulate;
(2) liquation is prepared: pure for metal Cu is heated to 1150 ~ 1180 DEG C, obtained Cu liquation;
(3) particulate is implanted: in funnel, arrange conduit, and the lower end of conduit is positioned at the place of leting slip a remark of funnel bottom, upper end and is communicated with elevated pressure nitrogen source of the gas, and conduit is also communicated with feed pipe, and the other end of feed pipe connects even feed appliance; The bottom of funnel arranges air supply plant, and the gas outlet of air supply plant is towards place of leting slip a remark;
The Cu liquation that step (2) is obtained is poured in funnel, the SiC copper facing particulate that step (1) obtains is added in even feed appliance, open elevated pressure nitrogen source of the gas, evenly feed appliance and air supply plant simultaneously, SiC copper facing particulate enters conduit equably by feed pipe, and conduit is blown under the at the uniform velocity wind-force of elevated pressure nitrogen source of the gas, Cu liquation is coated on the periphery of SiC copper facing particulate and together from leting slip a remark, is become composite micro-powder by gas atomization;
(4) screen: the composite micro-powder that step (3) obtains crosses 100 ~ 150 mesh sieves, gets lower part of screen and divides.
Preferably, the operating temperature of step (1) is 80 DEG C, and the electroless copper time is 3 hours.
Preferably, in step (1), chemical plating solution used divides cupric sulfate pentahydrate by 14 ~ 16 quality, 25 ~ 32 quality divide formaldehyde and 10 ~ 12 quality divide NaOH to be dissolved in 1000 quality to divide in water and make.
Preferably, the mass ratio of SiC particulate and chemical plating solution is 1:10.
Preferably, in step (3), the aspirated pressure of air supply plant is 1.2 ~ 1.4 MPa.
Compared with prior art, the invention has the beneficial effects as follows:
1, the present invention adopts high pressure nitrogen to be blown in Cu liquation to be spilt by the SiC copper facing particulate evenly sent, by Cu liquation, institute is coated, and together spill from let slip a remark with Cu liquation, Cu base SiC composite micro-powder is cooled to through gas atomization, high-melting-point SiC particulate homogenous is distributed in spherical substrate copper, improves the uniformity of SiC Particle Distribution; Feeding speed simultaneously by increasing SiC copper facing particulate can improve the content of SiC particulate flexibly, is beneficial to and improves electrical erosion resistance energy; SiC particulate increases the bond strength with Cu liquation after electroless copper process in addition, makes it give full play to electrical erosion resistance energy.
2, owing to containing SiC particulate in Cu matrix, improve the absorptivity of Cu to laser, providing favourable technical support for utilizing laser sintering and moulding electrode.
Accompanying drawing explanation
Fig. 1 is the structure chart of powder manufacturing apparatus.
Reference numeral is: 1, funnel; 2, conduit; 3, elevated pressure nitrogen source of the gas; 4, even feed appliance; 5, feed pipe; 6, air supply plant; 7, gas outlet; 8, let slip a remark.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is described in further detail.
Embodiment one
A kind of edm tool electrode Cu base SiC composite micro-powder is obtained successively according to following steps:
(1) SiC is made the particulate that particle diameter is 3um, be dissolved in the water of 1000 mass parts by the NaOH of the cupric sulfate pentahydrate of 14 mass parts, the formaldehyde of 25 mass parts and 10 mass parts and make chemical plating solution, SiC particulate is put into chemical plating solution and is carried out Electroless copper and drying, the mass ratio of SiC particulate and chemical plating solution is 1:10, obtained SiC copper facing particulate; The operating temperature of electroless copper is 80 DEG C, and the time is 3 hours;
(2) pure for metal Cu is heated to 1150 DEG C, obtained Cu liquation;
(3) in funnel 1, arrange conduit 2, the lower end of conduit 2 is positioned at 8 places of leting slip a remark bottom funnel 1, upper end is communicated with elevated pressure nitrogen source of the gas 3, conduit 2 is also communicated with feed pipe 5, and the other end of feed pipe 5 connects even feed appliance 4; The bottom of funnel 1 arranges air supply plant 6, and the gas outlet 7 of air supply plant 6 is towards 8 places of leting slip a remark;
The Cu liquation that step (2) is obtained is poured in funnel 1, the SiC copper facing particulate that step (1) obtains is added in even feed appliance 4, open elevated pressure nitrogen source of the gas 3, evenly feed appliance 4 and air supply plant 6 simultaneously, SiC copper facing particulate enters conduit 2 equably by feed pipe 5, and conduit 2 is blown under the at the uniform velocity wind-force of elevated pressure nitrogen source of the gas 3, Cu liquation is coated on the periphery of SiC copper facing particulate and together 8 leaks down from leting slip a remark, and is become composite micro-powder by the gas atomization that air supply plant 6 sprays; Wherein, the aspirated pressure of air supply plant 6 is 1.2MPa
(4) composite micro-powder that step (3) is obtained crosses 100 mesh sieves, gets lower part of screen and divides.
Embodiment two
The difference of the present embodiment and embodiment one is: in step (1), the particle diameter of SiC particulate is 4um, and in chemical plating solution, the mass fraction of cupric sulfate pentahydrate is 15 parts, and the mass fraction of formaldehyde is 28 parts, and the mass fraction of NaOH is 11 parts; In step (2), the heating-up temperature of the pure Cu of metal is 1165 DEG C; In step (3), the aspirated pressure of air supply plant 6 is 1.3 MPa; In step (4), the grit number excessively of composite micro-powder is 125 orders.
Embodiment three
The difference of the present embodiment and embodiment one is: in step (1), the particle diameter of SiC particulate is 5um, and in chemical plating solution, the mass fraction of cupric sulfate pentahydrate is 16 parts, and the mass fraction of formaldehyde is 32 parts, and the mass fraction of NaOH is 12 parts; In step (2), the heating-up temperature of the pure Cu of metal is 1180 DEG C; In step (3), the aspirated pressure of air supply plant 6 is 1.4 MPa; In step (4), the grit number excessively of composite micro-powder is 150 orders.
Adopt said method to adopt high pressure nitrogen to be blown into by SiC particulate in the Cu liquation bottom funnel 1, avoid the rising phenomenon of SiC particulate on the one hand; On the other hand SiC particulate is dispelled out, increase its distributing homogeneity.And can by the feeding amount of adjustment SiC copper facing particulate, the content of control SiC particulate flexibly, thus prepare the tool-electrode of different demand.
The above, it is only preferred embodiment of the present invention, be not restriction the present invention being made to other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be combined, change or retrofit and be Equivalent embodiments of the present invention.But everyly do not depart from technical solution of the present invention content, any simple modification, equivalent variations and the remodeling done above embodiment according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.
Claims (5)
1. an edm tool electrode preparation method for Cu base SiC composite micro-powder, comprises funnel, it is characterized in that: step is as follows:
(1) electroless copper: SiC is made the particulate that particle diameter is 3 ~ 5um, carries out electroless copper and drying to SiC microparticle surfaces, obtained SiC copper facing particulate;
(2) liquation is prepared: pure for metal Cu is heated to 1150 ~ 1180 DEG C, obtained Cu liquation;
(3) particulate is implanted: in funnel, arrange conduit, and the lower end of conduit is positioned at the place of leting slip a remark of funnel bottom, upper end and is communicated with elevated pressure nitrogen source of the gas, and conduit is also communicated with feed pipe, and the other end of feed pipe connects even feed appliance; The bottom of funnel arranges air supply plant, and the gas outlet of air supply plant is towards place of leting slip a remark;
The Cu liquation that step (2) is obtained is poured in funnel, the SiC copper facing particulate that step (1) obtains is added in even feed appliance, open elevated pressure nitrogen source of the gas, evenly feed appliance and air supply plant simultaneously, SiC copper facing particulate enters conduit equably by feed pipe, and conduit is blown under the at the uniform velocity wind-force of elevated pressure nitrogen source of the gas, Cu liquation is coated on the periphery of SiC copper facing particulate and together from leting slip a remark, is become composite micro-powder by gas atomization;
(4) screen: the composite micro-powder that step (3) obtains crosses 100 ~ 150 mesh sieves, gets lower part of screen and divides.
2. the preparation method of edm tool electrode Cu base SiC composite micro-powder according to claim 1, is characterized in that: the operating temperature of step (1) is 80 DEG C, and the electroless copper time is 3 hours.
3. the preparation method of edm tool electrode Cu base SiC composite micro-powder according to claim 2, is characterized in that: in step (1), chemical plating solution used divides cupric sulfate pentahydrate by 14 ~ 16 quality, 25 ~ 32 quality divide formaldehyde and 10 ~ 12 quality divide NaOH to be dissolved in 1000 quality to divide in water and make.
4. the preparation method of edm tool electrode Cu base SiC composite micro-powder according to claim 3, is characterized in that: the mass ratio of SiC particulate and chemical plating solution is 1:10.
5. according to the preparation method of the arbitrary described edm tool electrode Cu base SiC composite micro-powder of Claims 1-4, it is characterized in that: in step (3), the aspirated pressure of air supply plant is 1.2 ~ 1.4 MPa.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105861862A (en) * | 2016-04-23 | 2016-08-17 | 东莞市精研粉体科技有限公司 | Production method of spherical copper powder containing nanometer dispersion strengthening phases |
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| JPS6456810A (en) * | 1987-08-28 | 1989-03-03 | Daido Steel Co Ltd | Production of composite powder |
| JP2002226973A (en) * | 2001-01-31 | 2002-08-14 | Hitachi Chem Co Ltd | Method for manufacturing silver plated copper powder |
| CN1676249A (en) * | 2005-04-25 | 2005-10-05 | 北京科技大学 | Method and apparatus for preparing sheet-type metal pwoder by atomized drop deformation |
| CN101024248A (en) * | 2006-02-16 | 2007-08-29 | 精工爱普生株式会社 | Metal powder production apparatus and metal powder |
| KR20100122150A (en) * | 2009-05-12 | 2010-11-22 | 홍순직 | Apparatus for manufacturing metal matrix complex powder and manufacturing method thereof |
| CN102712044A (en) * | 2009-12-15 | 2012-10-03 | 韩国机械研究院 | Production method and production device for a composite metal powder using the gas spraying method |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6456810A (en) * | 1987-08-28 | 1989-03-03 | Daido Steel Co Ltd | Production of composite powder |
| JP2002226973A (en) * | 2001-01-31 | 2002-08-14 | Hitachi Chem Co Ltd | Method for manufacturing silver plated copper powder |
| CN1676249A (en) * | 2005-04-25 | 2005-10-05 | 北京科技大学 | Method and apparatus for preparing sheet-type metal pwoder by atomized drop deformation |
| CN101024248A (en) * | 2006-02-16 | 2007-08-29 | 精工爱普生株式会社 | Metal powder production apparatus and metal powder |
| KR20100122150A (en) * | 2009-05-12 | 2010-11-22 | 홍순직 | Apparatus for manufacturing metal matrix complex powder and manufacturing method thereof |
| CN102712044A (en) * | 2009-12-15 | 2012-10-03 | 韩国机械研究院 | Production method and production device for a composite metal powder using the gas spraying method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105861862A (en) * | 2016-04-23 | 2016-08-17 | 东莞市精研粉体科技有限公司 | Production method of spherical copper powder containing nanometer dispersion strengthening phases |
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Inventor after: Wei Xiuting Inventor after: Tian Zhongqiang Inventor after: Wang Dong Inventor before: Li Li Inventor before: Tian Zhongqiang Inventor before: Wang Dong |
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