CN101670438A - Metal injection molding product and carbon control method thereof in manufacturing process - Google Patents
Metal injection molding product and carbon control method thereof in manufacturing process Download PDFInfo
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Abstract
The invention relates to a metal injection molding product which contains material ingredients and a molding agent ingredient, wherein the material ingredients comprise 90-95 percent of iron powder, 2-5 percent of nickel powder and 0.5-1 percent of molybdenum powder; the molding agent ingredient contains paraffin wax, low density polyethylene, polypropylene, carnauba wax and stearic acid; and theadjustment range of the molding agent content is 6.0 percent to 8.0 percent. The carbon content range of a finally-sintered product can be effectively controlled by adopting the percentages and the contents of the materials, and therefore, the carbon content is controlled easily and accurately. In addition, the molding agent has the advantages of easy removal, environment protection, good fluidityand shaping effect, and the like, therefore, the quenched product has even and uniform internal and external hardness, and the processed product is ensured not to deform easily; and due to appropriate temperature, push speed and gas flow adopted on a thermal adsorption process as well as skilled drive to the ambient humidity, the stability of the process sand and the carbon content can be ensured, and the product with optimal performance is prepared.
Description
[technical field]
The present invention relates to a kind of forming method of metal dust, specifically be a kind of metal injection molding product that is used for controlling the powder metallurgy product phosphorus content with and make carbon control method.
[background technology]
In the existing metal injection molding product field, the content of carbon is an eternal topic in the control product, on the basis of not adding other compounds, has only strict control phosphorus content could obtain final physical and mechanical properties.In order to obtain final physical and mechanical properties, in the production technology two kinds of basic solutions are being arranged at present, first kind is to carry out follow-up heat treatment behind the sintering, i.e. carburizing and quenching; Second kind is exactly degreasing sintered incorporate technology.But, obtaining iron-base products after the heat treatment of first kind of mode, its hardness is surface rockwell hardness, has only surperficial one deck carburized layer can reach the hardness requirement of regulation, its inner Rockwell hardness number is very low.The product that obtains behind second kind of processing mode, its poor stability, wayward, deflection is big and qualification rate is low.The atmosphere that produces because of degreasing in the stove in second kind of processing mode has very big influence to the product sintering again, finally can cause problems such as product distortion, fusion to take place.
[summary of the invention]
Technical purpose of the present invention be provide in order to solve the problem that above-mentioned prior art exists a kind of not only have processed good stability of products, easily accurately the control carbon content and keep quenching after inside and outside hardness uniformity, but also the product after can effectively keeping processing is not yielding and the metal injection molding product that improves product percent of pass with and make carbon control method.
In order to realize above-mentioned technical problem, a kind of metal injection molding product provided by the present invention, it includes material composition and forming agent composition; Described material composition includes iron powder, nickel powder and molybdenum powder; Described forming agent composition contains paraffin, low density polyethylene (LDPE), polypropylene, Brazil wax, stearic acid; Described iron content is 90% to 95%, and nickel powder content is 2% to 5%,, molybdenum powder: 0.5% to 1%, the adjustable range of described forming agent content is: 6.0% to 8.0%.
According to above-mentioned major technique feature, the optimal parameter of described forming agent content is 7.0%.
In order to make above-mentioned metal injection molding product, and the making flow process that adopts is: first step, batch mixing: carry out batch mixing on the batch mixer of V-arrangement powder, do not put mill ball, mixing time is 4 to 5 hours, makes various powder even, and each element mixes and gets final product in the compound after testing;
Second step, high mixing: adopt super mixer to mix, super mixer heating in ten minutes in advance, set more than heating-up temperature 100 degree, temperature of charge is 80 degree, and temperature is raised to the back and adds compound and forming agent, heating-up temperature progressively is elevated to more than 150 degree, and can not surpass 170 degree, and be strict controlled in this scope, after occurring shaking to described super mixer, uncap and check the mixing situation, checked once in per afterwards 5 minutes, and till mixing, promptly shut down and take out cooling, fragmentation;
Third step, extrude: adopt double screw extruder to extrude, design temperature a: district: 145 degree are to 165 degree, two districts be 145 degree to 165 degree, three districts be 145 degree to 165 degree, 145 spend to 165 and spend in four districts, five districts are that 145 degree are to 165 degree, six districts be 150 degree to 170 degree, seven districts be 155 degree to 175 degree, to be 160 degree spend to 180 head temperature; The main frame electric current is 8 amperes to 12 amperes, and the feeding rotating speed is 30r/min to 55r/min, and the driving screw rotating speed is 18HZ to 20HZ, melting body pressure is 2.2MPa to 4.0MPa, and the melt pressure fluctuation range is 1Mpa, if surpass this scope, need to extrude once, up to requirement up to specification more;
The 4th step, injection moulding: adopt injection (mo(u)lding) machine that product is carried out moulding, injector requires: screw rod, barrel are wear-resisting, the configuration of employing bimetallic, temperature can be set at: one section be 140 the degree to 165 the degree, two sections be 145 the degree to 170 the degree, three sections be 160 the degree to 180 the degree; Mold temperature is that 40 degree are to 60 degree; Screw speed is 30rpm to 50rpm; Injection rate is 50 to 90ml/s; Injection pressure is 80MPa to 150MPa; Dwell pressure is 70MPa to 150MPa; Be 10s to 30s cool time; With different injector set according to product size with injection parameters inject time;
The 5th step, extraction: adopt the solvent degreasing groove to carry out solvent degreasing; Also can make non-standard equipment by oneself extracts, extractant adopts trichloro-ethylene, extraction process is: be raised to 60 from room temperature and spend in 1 hour, 60 degree insulations 1 to 3 hour, be raised to 70 degree from 60 degree in 1 hour, 70 degree speed are from 200min to 800min, and extraction square is directly proportional with time and the gauge of injecting blank, the time of thick more usefulness is long more, determines the extraction time according to the thickness of specific product;
The 6th step, heat is taken off: adopt debinding furnace to carry out hot degreasing, skimming temp is respectively: a band is 300 degree, and two bands are 450 degree, and three bands are 600 degree, and the four-tape is 780 degree; Hydrogen flowing quantity is 1.0m
3/ h to 1.8m
3/ h, pushing away boat speed is 30min to 80min/ boat, adjusts boat charge and pushes away boat speed according to the product size;
The 7th step, vacuum-sintering: adopt vacuum sintering furnace to carry out sintering, sintering temperature is 1180 to 1270 degree, gas filling technology: temperature is raised to 1000 when spending, and stops mechanical pump and lobe pump, begins to charge into argon gas, is shown as negative 0.02Mpa to Pressure gauge;
The 8th step, post processing: shaping, sandblast, boring, polishing, polishing, tapping technology;
The 9th step detects: carry out size detection by drawing, carry out 7.5g/cm by material performance requirement
3Density, 0.40% to 0.75% total carbon detect, and carry out outward appearance, carrying out flaw detection by the technical protocol requirement;
The tenth step, heat treatment: quenching apparatus is that the meshbeltfurnace vacuum quencher quenches, hardening heat be 830 degree to 840 degree, be cooled to oil cooling, temperature be 320 degree to 340 degree, temperature retention time is 2 hours;
The 11 step, post processing: sandblast, polishing, antirust, packing, warehouse-in.
According to above-mentioned major technique feature, described crushing process is that the particle size of compound forms less than 4 millimeters after the employing crusher in crushing.
According to above-mentioned major technique feature, the hydrogen in the described defatting step decomposes by ammonia and gas purification apparatus gets the liquefied ammonia decomposition.
Useful technique effect of the present invention: because of the scope that adopts the product carbon content that above-mentioned material composition ratio and content goes out final sintering can effectively be controlled, correct mix proportion scheme can satisfy different material properties, controls carbon content easily accurately thereby reach.Be easy to remove because of above-mentioned forming agent has again, environmental protection, good fluidity and conformal be effective, make after quenching inside and outside hardness uniformity and effectively keep processing after the on-deformable purpose of product.Again because of taking off the suitable temperature of employing on the technology in heat, pushing away speed, gas flow and skillfully controlling to ambient humidity, make the preliminary control that removes with carbon content to forming agent that important effect be arranged, simultaneously can the assurance process and the stability of carbon content, thus reach the purpose of processed good stability of products.In addition owing to be after heat is taken off, control carbon to be played the factor of key effect at the temperature curve of vacuum sintering technology and protective atmosphere, can be accurately the rational effective carbon content of the product that goes out of the final sintering of control of heating curve and inflator artistic skill.
Below in conjunction with embodiment, technical scheme of the present invention is described in further detail.
[specific embodiment]
Illustrating below in conjunction with specific embodiment provides a kind of metal injection molding product among the present invention, it includes material composition and forming agent composition; Described material composition includes iron powder, nickel powder and molybdenum powder; Described forming agent composition contains paraffin, low density polyethylene (LDPE), polypropylene, Brazil wax, stearic acid; Iron content is 90% to 95%, and nickel powder content is 2% to 5%, molybdenum powder: 0.5% to 1%, and the adjustable range of described forming agent content is 6.0% to 8.0%.
In order to make above-mentioned metal injection molding product, and the making flow process that adopts is:
First step, batch mixing: carry out batch mixing on the batch mixer of V-arrangement powder, do not put mill ball, mixing time is 4 to 5 hours, makes various powder even, each element mixes and gets final product in the compound after testing.
Second step; high mixing: adopt super mixer to mix; super mixer is very planted heating in advance; setting heating-up temperature is more than 100 degree; temperature of charge is 80 degree; temperature is raised to the back and adds compound and forming agent; heating-up temperature progressively is elevated to more than 150 degree; and can not surpass 170 degree, and be strict controlled in this scope, after occurring shaking to described super mixer; uncap and check the mixing situation; checked once in per afterwards 5 minutes, and till mixing, promptly shut down and take out cooling, fragmentation.Described crushing process is that the particle size of compound forms less than 4 millimeters after the employing crusher in crushing.
Third step, extrude: adopt double screw extruder to extrude, design temperature a: district: 145 degree are to 165 degree, two districts be 145 degree to 165 degree, three districts be 145 degree to 165 degree, 145 spend to 165 and spend in four districts, five districts are that 145 degree are to 165 degree, six districts be 150 degree to 170 degree, seven districts be 155 degree to 175 degree, to be 160 degree spend to 180 head temperature; The main frame electric current is 8 amperes to 12 amperes, and the feeding rotating speed is 30r/min to 55r/min, and the driving screw rotating speed is 18HZ to 20HZ, melting body pressure is 2.2MPa to 4.0MPa, and the melt pressure fluctuation range is 1Mpa, if surpass this scope, then need to extrude once, up to requirement up to specification more.
The 4th step, injection moulding: adopt injection (mo(u)lding) machine that product is carried out moulding, injector requires: screw rod, barrel are wear-resisting, the configuration of employing bimetallic, temperature can be set at: one section be 140 the degree to 165 the degree, two sections be 145 the degree to 170 the degree, three sections be 160 the degree to 180 the degree; Mold temperature is that 40 degree are to 60 ℃; Screw speed is 30rpm to 50rpm; Injection rate is 50 to 90ml/s; Injection pressure is 80MPa to 150MPa; Dwell pressure is 70MPa to 150MPa; Be 10s to 30s cool time.
The 5th step, extraction: adopt the solvent degreasing groove to carry out solvent degreasing; Also can make non-standard equipment by oneself and extract, extractant adopts trichloro-ethylene, and extraction process is: be raised to 60 degree from room temperature in 1 hour, 60 degree insulations 1 hour to 3 hours were raised to 70 degree from 60 degree in 1 hour, and 70 degree keep 200min to 800min.
The 6th step, heat is taken off: adopt debinding furnace to carry out hot degreasing, skimming temp is respectively: a band is 300 degree, and two bands are 450 degree, and three bands are 600 degree, and the four-tape is 780 degree; Hydrogen flowing quantity is 1.0m
3/ h to 1.8m
3/ h, pushing away boat speed is that the 30min/ boat is to the 80min/ boat.
The 7th step, vacuum-sintering: adopt vacuum sintering furnace to carry out sintering, sintering temperature be 1180 degree to 1270 degree, gas filling technology: temperature is raised to 1000 when spending, and stops mechanical pump and lobe pump, begins to charge into argon gas, is shown as negative 0.02Mpa to Pressure gauge.
The 8th step, post processing: shaping, sandblast, boring, polishing, polishing, tapping technology.
The 9th step detects: carry out size detection by drawing, carry out 7.5g/cm by material performance requirement
3Density, 0.40% to 0.75% total carbon detect, and carry out outward appearance, carrying out flaw detection by the technical protocol requirement.
The tenth step, heat treatment: quenching apparatus is that the meshbeltfurnace vacuum quencher quenches, hardening heat be 830 degree to 840 degree, be cooled to oil cooling, temperature be 320 degree to 340 degree, temperature retention time is 2 hours.
The 11 step, post processing: sandblast, polishing, antirust, packing, warehouse-in.
In above-mentioned whole making flowchart process, can significantly improve hardness after in heat treatment, quenching, and can in production process, regulate according to product requirement, the impact flexibility of material, tensile strength, yield strength, percentage elongation etc. all can improve significantly simultaneously.The deflection of product is little in addition, the qualification rate height, and interior tissue is even, and product density can reach more than 95% of entity density.
In burden process, at in the composition of raw material itself not the need of carbon containing or carbon containing deficiency carry out carbon source and replenish, and the additional need of carbon source are carried out according to the loss degree of carbon in hot degreasing and the vacuum-sintering process, and control by control forming agent residual carbon amount after hot degreasing.
Be the first step that carbon runs off on this operation of hot degreasing, hot degreasing is controlled by adopting gas shield degreasing mode that carbon is run off, and the protective gas in the gas shield degreasing is the decomposed ammonia body, and main component is hydrogen (H
2), nitrogen (N
2), also have part aqueous vapor (H
2O); and carbon (C) at high temperature reacts with aqueous vapor; generate carbon monoxide and hydrogen; from this course of reaction as can be seen, the factor that influences carbon mainly is temperature and water content, therefore reasonably controls the temperature of hot degreasing; the condition of generation is not provided for decarburizing reaction; will stop the loss of carbon, the water content in flow, dew point and the product of strict simultaneously control protective gas can block the approach that carbon runs off too, and finally controls the carbon success.Because whole hot degreasing process is a discontinuous process, it is the process that a temperature progressively raises, use at different product different push away speed and can guarantee that the binding agent in the product can effectively be removed, can make the decarburizing reaction in the product too inviolent simultaneously again in the high-temperature region reaction.In selection and setting to each degreasing warm area temperature, requirement should guarantee that binding agent can be removed, and can make inviolent the carrying out of decarburizing reaction again, so the selection of skimming temp must be accurate.
In control to moisture content; except strict to the water content in the protective atmosphere; the humidity of environment is also very big to the influence of product simultaneously; so the filler that hot degreasing is used must keep dry; the product that heat takes off must seal preservation; also to carry out suitable adjustment to the technology of hot degreasing simultaneously, can stop the influence of extraneous factor like this product carbon content according to the humiture of environment.Have only from above these two aspects process is controlled, could guarantee that the carbon content in the product that hot degreasing comes out obtains preliminary control.Vacuum-sintering also is an operation that can cause carbon to run off.Have only rational programming rate, rational sintering temperature, reasonably temperature retention time, and rational gas filling technology just can make the carbon in the product be controlled uniformly according to performance requirement.It is not high that the required temperature of loss takes place carbon in the product, but temperature is constantly to rise during vacuum-sintering, and carbon only just can be solid-solubilized in the alloying component in time more than 1000 ℃, so the temperature-rise period of sintering is exactly a process of constantly losing carbon, has only the mistake carbon principle of grasping it could formulate effective sintering process.
In sum, can effectively control because of the scope that adopts the product carbon content that above-mentioned material composition ratio and content goes out final sintering, correct control carbon scheme can satisfy different material properties, thereby reaches easily accurately control carbon content.Be easy to remove because of above-mentioned forming agent has again, environmental protection, good fluidity and conformal be effective, make the inside and outside hardness uniformity of quenched products and effectively keep processing after product not yielding.Again because of taking off the suitable temperature of employing on the technology in heat, pushing away speed, gas flow and skillfully controlling to ambient humidity, make the preliminary control that removes with carbon content to forming agent that important effect be arranged, simultaneously can the assurance process and the stability of carbon content, thus reach the purpose of processed good stability of products.In addition owing to be after heat is taken off, control carbon to be played the factor of key effect at the temperature curve of vacuum sintering technology and protective atmosphere, can be accurately the rational effective carbon content of the product that goes out of the final sintering of control of heating curve and inflator artistic skill.
Claims (5)
1, a kind of metal injection molding product, it includes material composition and forming agent composition; Described material composition includes iron powder, nickel powder and molybdenum powder; Described forming agent composition contains paraffin, low density polyethylene (LDPE), polypropylene, Brazil wax, stearic acid; It is characterized in that: described iron content is 90% to 95%, and nickel powder content is 2% to 5%,, molybdenum powder: 0.5% to 1%, the adjustable range of described forming agent content is: 6.0% to 8.0%.
2, metal injection molding product according to claim 1 is characterized in that: the optimal parameter of described forming agent content is 7.0%.
3, in order to make above-mentioned metal injection molding product, and the making flow process that adopts is: first step, batch mixing: on the batch mixer of V-arrangement powder, carry out batch mixing, do not put mill ball, mixing time is 4 to 5 hours, make various powder even, each element mixes and gets final product in the compound after testing;
Second step, high mixing: adopt super mixer to mix, super mixer heating in ten minutes in advance, set more than heating-up temperature 100 degree, temperature of charge is 80 degree, and temperature is raised to the back and adds compound and forming agent, heating-up temperature progressively is elevated to more than 150 degree, and can not surpass 170 degree, and be strict controlled in this scope, after occurring shaking to described super mixer, uncap and check the mixing situation, checked once in per afterwards 5 minutes, and till mixing, promptly shut down and take out cooling, fragmentation;
Third step, extrude: adopt double screw extruder to extrude, design temperature a: district: 145 degree are to 165 degree, two districts be 145 degree to 165 degree, three districts be 145 degree to 165 degree, 145 spend to 165 and spend in four districts, five districts are that 145 degree are to 165 degree, six districts be 1 50 degree to 170 degree, seven districts be 155 degree to 1 75 degree, to be 160 degree spend to 180 head temperature; The main frame electric current is 8 amperes to 12 amperes, and the feeding rotating speed is 30r/min to 55r/min, and the driving screw rotating speed is 18HZ to 20HZ, melting body pressure is 2.2MPa to 4.0MPa, and the melt pressure fluctuation range is 1Mpa, if surpass this scope, need to extrude once, up to requirement up to specification more;
The 4th step, injection moulding: adopt injection (mo(u)lding) machine that product is carried out moulding, injector requires: screw rod, barrel are wear-resisting, the configuration of employing bimetallic, temperature can be set at: one section be 140 the degree to 165 the degree, two sections be 145 the degree to 170 the degree, three sections be 160 the degree to 180 the degree; Mold temperature is that 40 degree are to 60 degree; Screw speed is 30rpm to 50rpm; Injection rate is 50 to 90ml/s; Injection pressure is 80MPa to 150MPa; Dwell pressure is 70MPa to 150MPa; Be 10s to 30s cool time; With different injector set according to product size with injection parameters inject time;
The 5th step, extraction: adopt the solvent degreasing groove to carry out solvent degreasing; Also can make non-standard equipment by oneself extracts, extractant adopts trichloro-ethylene, extraction process is: be raised to 60 from room temperature and spend in 1 hour, 60 degree insulations 1 to 3 hour, be raised to 70 degree from 60 degree in 1 hour, 70 degree speed are from 200min to 800min, and extraction square is directly proportional with time and the gauge of injecting blank, the time of thick more usefulness is long more, determines the extraction time according to the thickness of specific product;
The 6th step, heat is taken off: adopt debinding furnace to carry out hot degreasing, skimming temp is respectively: a band is 300 degree, and two bands are 450 degree, and three bands are 600 degree, and the four-tape is 780 degree; Hydrogen flowing quantity is 1.0m
3/ h to 1.8m
3/ h, pushing away boat speed is 30min to 80min/ boat, adjusts boat charge and pushes away boat speed according to the product size;
The 7th step, vacuum-sintering: adopt vacuum sintering furnace to carry out sintering, sintering temperature is 1180 to 1270 degree, gas filling technology: temperature is raised to 1000 when spending, and stops mechanical pump and lobe pump, begins to charge into argon gas, is shown as negative 0.02Mpa to Pressure gauge;
The 8th step, post processing: shaping, sandblast, boring, polishing, polishing, tapping technology;
The 9th step detects: carry out size detection by drawing, carry out 7.5g/cm by material performance requirement
3Density, 0.40% to 0.75% total carbon detect, and carry out outward appearance, carrying out flaw detection by the technical protocol requirement;
The tenth step, heat treatment: quenching apparatus is that the meshbeltfurnace vacuum quencher quenches, hardening heat be 830 degree to 840 degree, be cooled to oil cooling, temperature be 320 degree to 340 degree, temperature retention time is 2 hours;
The 11 step, post processing: sandblast, polishing, antirust, packing, warehouse-in.
4, metal injection molded making carbon control method according to claim 3 is characterized in that: described crushing process is that the particle size of compound forms less than 4 millimeters after the employing crusher in crushing.
5, metal injection molded making carbon control method according to claim 3 is characterized in that: the hydrogen in the described defatting step decomposes by ammonia and gas purification apparatus gets the liquefied ammonia decomposition.
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2008
- 2008-09-12 CN CN200810216131A patent/CN101670438A/en active Pending
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| CN102115606A (en) * | 2010-12-06 | 2011-07-06 | 常州精研科技有限公司 | Adhesive and method for preparing metal powder injection molding feedstock from same |
| CN102115606B (en) * | 2010-12-06 | 2012-07-25 | 常州精研科技有限公司 | Adhesive and method for preparing metal powder injection molding feedstock from same |
| CN102107282A (en) * | 2011-01-11 | 2011-06-29 | 山东金聚粉末冶金有限公司 | Automobile oil way joint and manufacturing method thereof |
| CN102649158A (en) * | 2011-02-25 | 2012-08-29 | 山东金聚粉末冶金有限公司 | Tooth yoke and manufacturing method thereof |
| CN102649160A (en) * | 2011-02-25 | 2012-08-29 | 山东金聚粉末冶金有限公司 | Junction box and manufacturing method thereof |
| US9533353B2 (en) | 2012-02-24 | 2017-01-03 | Hoeganaes Corporation | Lubricant system for use in powder metallurgy |
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| CN102672179A (en) * | 2012-06-07 | 2012-09-19 | 太仓市锦立得粉末冶金有限公司 | Production technique of powder metallurgy product |
| CN103567451A (en) * | 2012-08-10 | 2014-02-12 | 现代自动车株式会社 | Method for manufacturing valve train parts using metal powder injection molding |
| CN103567451B (en) * | 2012-08-10 | 2017-12-22 | 现代自动车株式会社 | The method that valve actuating mechanism parts are manufactured using metal powder injection molding |
| CN102941345B (en) * | 2012-11-27 | 2014-11-12 | 浙江一火科技有限公司 | Method for manufacturing outer shuttle of rotating shuttle by injection molding |
| CN102941345A (en) * | 2012-11-27 | 2013-02-27 | 浙江一火科技有限公司 | Method for manufacturing outer shuttle of rotating shuttle by injection molding |
| CN104070167A (en) * | 2013-03-29 | 2014-10-01 | 王统 | Powder injection molding process |
| CN104325141A (en) * | 2014-10-23 | 2015-02-04 | 苏州莱特复合材料有限公司 | Injection molding method of powder metallurgy material |
| CN104708004A (en) * | 2015-01-04 | 2015-06-17 | 赵立地 | Inorganic powder extrusion molding process |
| CN105154700A (en) * | 2015-09-24 | 2015-12-16 | 瑞声精密制造科技(常州)有限公司 | Heavy-density tungsten alloy |
| CN105108166A (en) * | 2015-09-29 | 2015-12-02 | 四川有色金源粉冶材料有限公司 | Method for preparing iron-base alloy powder used for injection molding |
| CN106001581A (en) * | 2016-07-28 | 2016-10-12 | 深圳市注成科技有限公司 | Manufacturing method of tungsten ball mat for grenades |
| CN106001581B (en) * | 2016-07-28 | 2018-11-20 | 深圳市注成科技有限公司 | A kind of manufacturing method of howitzer tungsten pearl pad |
| CN106670451A (en) * | 2016-12-28 | 2017-05-17 | 江苏精研科技股份有限公司 | Formula and preparation method of copper alloy feed for powder injection molding |
| CN106670451B (en) * | 2016-12-28 | 2018-11-27 | 江苏精研科技股份有限公司 | Powder injection forming copper alloy feeding |
| CN107042303A (en) * | 2017-04-07 | 2017-08-15 | 海安县鹰球粉末冶金有限公司 | A kind of de- furnace apparatus of vacuum and atmosphere dual-purpose type heat |
| CN107775005A (en) * | 2017-11-29 | 2018-03-09 | 安徽恒利增材制造科技有限公司 | A kind of injection molding method of high-strength aluminum alloy turbine wheel |
| CN107775005B (en) * | 2017-11-29 | 2019-08-02 | 安徽恒利增材制造科技有限公司 | A kind of injection molding method of high-strength aluminum alloy turbine wheel |
| CN108380869A (en) * | 2018-03-15 | 2018-08-10 | 东莞华晶粉末冶金有限公司 | Inexpensive 310 powder of stainless steel injection moulding cerul feeding and preparation method thereof |
| CN108500276A (en) * | 2018-04-11 | 2018-09-07 | 深圳艾利佳材料科技有限公司 | The method that metal oxide manufactures part |
| CN108817402A (en) * | 2018-06-26 | 2018-11-16 | 深圳市鑫迪科技有限公司 | Metallic powder injection moulding process |
| CN109047748A (en) * | 2018-07-18 | 2018-12-21 | 东莞华晶粉末冶金有限公司 | Environment-friendly type iron-based powder is injection moulded the preparation method of feeding and iron-base part product |
| CN109108272A (en) * | 2018-10-10 | 2019-01-01 | 厦门理工学院 | A kind of preparation method of the composition for being used to prepare engine link and engine link |
| CN109249014A (en) * | 2018-10-10 | 2019-01-22 | 厦门理工学院 | A kind of preparation method of the composition for being used to prepare the corrosion-resistant engine link of high density and engine link |
| CN109261955A (en) * | 2018-10-10 | 2019-01-25 | 厦门理工学院 | A kind of preparation method of the composition for being used to prepare high-density high-strength engine link and engine link |
| CN109877325A (en) * | 2019-03-21 | 2019-06-14 | 宁波格林泰克金属材料有限公司 | Production method applied to cooking machine juicing component 304L material metal screw rod |
| CN109746440A (en) * | 2019-03-21 | 2019-05-14 | 宁波格林泰克金属材料有限公司 | Production method applied to the Fe8Ni material helical teeth in notebook hinge system |
| CN110919008A (en) * | 2019-11-22 | 2020-03-27 | 东莞市豪准金属制品有限公司 | Metal injection molding process |
| CN111545757A (en) * | 2020-05-21 | 2020-08-18 | 深圳市富优驰科技有限公司 | Production process of rotating part |
| CN112427641A (en) * | 2020-12-03 | 2021-03-02 | 安徽昊方机电股份有限公司 | Preparation method of mobile phone middle plate jig |
| CN112427641B (en) * | 2020-12-03 | 2023-02-28 | 安徽昊方机电股份有限公司 | Preparation method of mobile phone middle plate jig |
| CN113210606A (en) * | 2021-05-17 | 2021-08-06 | 深圳市注成科技股份有限公司 | Metal injection molding powder metallurgy repressing and re-sintering method |
| CN114309631A (en) * | 2021-12-31 | 2022-04-12 | 湖南元极新材料有限公司 | Rhenium powder preparation method |
| CN114309631B (en) * | 2021-12-31 | 2024-01-16 | 湖南元极新材料有限公司 | Preparation method of rhenium powder |
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