CN1511663A - Method and device for reducing heat loss of metal atomizing flow guide system - Google Patents
Method and device for reducing heat loss of metal atomizing flow guide system Download PDFInfo
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- CN1511663A CN1511663A CNA021597340A CN02159734A CN1511663A CN 1511663 A CN1511663 A CN 1511663A CN A021597340 A CNA021597340 A CN A021597340A CN 02159734 A CN02159734 A CN 02159734A CN 1511663 A CN1511663 A CN 1511663A
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- mozzle
- overcoat
- inner core
- flow guide
- heat loss
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Abstract
The present invention discloses method of lowering heat loss of guide system for atomized metal melt, and features the composite guide pipe structure comprising inside core, outer sleeve and length regulating unit of proper material. The present invention also discloses device for lowering heat loss of guide system for atomized metal melt, and the device includes length regulating disc, inner core, outer sleeve and other parts. The method and device of the present invention is suitable for guiding atomized metal melt and has the advantages of capacity of greatly lowering the overheat degree of atomized melt, simple structure, easy regulation, low cost, lowering pollution to alloy, etc.
Description
Technical field
The present invention relates to a kind of method and device that is used to reduce metal atomization flow guide system heat loss, can be applicable to industries such as machinery, metallurgy, material.
Background technology
Rapid solidification aerosolization alloy powder preparation/powder metallurgy (RS/PM) technology is that industrially developed country grows up and drop into the advanced technology of preparing of a kind of material of industrial applications the sixties in 20th century.But rapid solidification aerosolization technology crystal grain thinning, weaken segregation, enlarge the element solid solution degree, produce some metastable phases and cenotype, have and directly prepare little high-alloying dusty material and the advantage that can be mass-produced polluted, can prepare by operations such as the follow-up powder degassing, compacting sintering and have, can be widely used in fields such as Aero-Space, electronic information, electricity power, metallurgical machinery than the low gas content amount, near the nearly net shape products of part net shape.
The basic principle of rapid solidification aerosolization technology is: molten metal injects that crucible is leaked at the end and when mozzle flows out, the high-speed gas that is penetrated by crucible below nozzle is atomized into fine drop, solidifies rapidly when alloy liquid droplet flies in atomization gas subsequently to be cooled to powder.According to the fit system of atomizer and mozzle, aerosolization can be divided into two classes: unrestricted formula and restraint-type.Unrestricted formula atomizer is meant that melt is behind mozzle outflow free-falling one segment distance, just by the high velocity air fragmentation.And the restraint-type atomizer is meant that melt flows out after the very short distance or directly promptly begins atomizing in the mozzle end from mozzle.The capacity usage ratio of unrestricted formula atomizer atomization gas is low, and the granularity of powder is thicker, and the restraint-type atomizer is because nozzle and mozzle close-coupled, the capacity usage ratio height of atomization gas, and can produce metastable liquid and flow, the granularity of powder is thinner.
The high performance alloys powder normally based on Fe-, Ni-, Co-, Ti-, Re-base alloy, contains Al, Cr, B, Zr, Ti, Re isoreactivity constituent element, possesses high-melting-point (generally being higher than 1000 ℃), high activity characteristics.This class alloy generally relies on the solution strengthening effect of interpolation constituent element or obtains high performance with superfine little precipitation precipitated phase dispersion-strengthened action.The restraint-type aerosolization is because powder particle is thin, the cooling rate height, because square being inversely proportional to of the cooling rate of powder and its diameter, particle diameter is thin more, and cooling rate is high more, therefore, rapid solidification remarkably productive, promptly can improve the solid solubility and the solid solution mark that add constituent element greatly, perhaps make the precipitated phase small and dispersed, thereby significantly improve the performance of alloy.
When the aerosolization technology prepares high-melting-point alloy with high activity powder, having run into a serious problem, is exactly the reaction problem of atomization plant such as active component and crucible under the high temperature, and this is in U.S. Pat 4,631, more comprehensive argumentation is arranged in 013.The reaction of refractory material such as active component and crucible under the high temperature, make crucible damage perils such as runout takes place easily on the one hand, polluted alloy powder on the one hand again, performance can reduce significantly after such powder was made member, because react the formation of crack that will become material failure that is mingled with that generates.Therefore, atomizing melt overheat degree is low more good more.
But in restraint-type aerosolization mode, mozzle is generally single layer structure, sees Fig. 1 (U.S. Pat 4,631,013).Especially its end heat dissipation is very fast because mozzle and nozzle close-coupled, atomization process high speed cold airflow make mozzle, thereby very easily causes alloy liquid stream frozen plug in the mozzle, causes atomization process to interrupt.For guaranteeing carrying out smoothly of atomization process, have to improve the degree of superheat of melt, generally at 250～400 ℃, the raising of temperature will aggravate the reaction of melt and refractory material, pollute alloy.U.S. Pat 5,468,133 disclose a kind of method and structure that reduces the melt overheat degree, see Fig. 2.The method that adopts is to reduce mozzle and nozzle contact area as far as possible, and with the reduction thermal loss, but its mozzle is still single layer structure.When atomizing high-melting-point, alloy with high activity, the mozzle of individual layer is general adopt high temperature resistant, thermal insulation good, be the ceramic material of inertia with respect to melt, as Al
2O
3, ZrO
2, ceramic material such as BN, but Al
2O
3, ZrO
2The intensity height, fragility is big, damages easily, and is difficult for being processed into complicated accurate shape, though BN processing easily, intensity is not high, not gasproof body deflation can be polluted alloy powder, and can only use once.The mozzle of ceramic material is the cost height not only, has also increased assembly difficulty because of it is frangible.In addition, because the restraint-type aerosolization is very harsh to the relative position relation and the dimensional requirement of mozzle and nozzle, the pottery mozzle is general and crucible is bonding, and the mozzle length of stretching out nozzle has fluctuation like this, will cause the instability and the poor repeatability of atomization process.
Summary of the invention
The purpose of this invention is to provide a kind of method and device that reduces metal atomization flow guide system heat loss, it can reduce atomizing melt overheat degree significantly, and simple in structure, easy for installation, mozzle is adjustable, and cost is lower, can significantly weaken alloy and pollute.
For achieving the above object, the present invention is by the following technical solutions:
A kind of method that reduces metal atomization flow guide system heat loss, it overcomes the shortcoming of conventional monolayers structure mozzle, adopt the version of composite flow guide pipe, utilize mozzle inner core and overcoat the gap, select different materials and length adjustment structure for use, solve the too fast and manufacturing of fused mass flow guiding system heat loss, installation question;
Described composite flow guide pipe is meant that mozzle changes multilayer structure into by individual layer, is made of mozzle inner core and overcoat bilayer;
Described gap is meant between mozzle inner core and the overcoat has minim gap to separate, not directly contact greatly reduce scattering and disappearing of inner core heat, and the forward end of mozzle overcoat tapering contacts the location with nozzle, remainder does not contact with nozzle, has further reduced the thermal loss of overcoat;
Described different materials is meant that the mozzle inner core can select different materials with overcoat, but overcoat selection intensity height, be easy to process, inexpensive material, even that inner core can be selected is high temperature resistant, thermal insulation good, inertia, be easy to process or be difficult to process but can be made into the ceramic material of simple shape;
Described length adjustment structure is meant length that the mozzle inner core stretches out nozzle is stretched out nozzle by the mozzle overcoat length decision, and can be along long to relative motion between mozzle inner core and the overcoat, it is concordant with the outer end of overcoat to adjust the mozzle inner core, guarantees that whole mozzle stretches out the length of nozzle.
Described mozzle overcoat is preferentially selected carbon steel, stainless steel metal material, and the mozzle inner core is preferentially selected Al
2O
3, ZrO
2, the BN ceramic material.
Described length adjustment structure is that length with respect to inner core is fixed and adjusted to the mozzle overcoat by the screw thread of length adjustment dish, guarantees that the ectonexine end is concordant.
According to an embodiment preferred, the length adjustment structure adopts engage thread, one disc centre is threaded the hole, the mozzle inner core passes the disc centre hole, concentric with disk, the two is bonded in crucible bottom in the lump, mozzle overcoat one end has external screw thread, by being threaded in the length of also adjusting on the disk with respect to inner core, concordant until the ectonexine end, the other end is taper, match with the tapering of centre bore in the nozzle, play and support mozzle (and crucible) and the effect of locating, guarantee that mozzle stretches out the length of nozzle, remainder does not contact with nozzle.
According to another embodiment preferred, the mozzle overcoat is preferentially selected carbon steel, stainless steel and other metal materials, and the mozzle inner core is preferentially selected Al
2O
3, ZrO
2, BN, Si
3N
4Deng ceramic material.
According to another embodiment preferred, the mozzle inner core can be made simple tubulose.
The present invention also provides a kind of device that reduces metal atomization flow guide system heat loss, and it is made up of length adjustment dish, mozzle inner core, mozzle overcoat;
Described length adjustment dish is cemented in crucible bottom, and an internal thread hole is arranged in the middle of the adjustment dish;
Described mozzle inner core passes the center internal thread hole of length adjustment dish, is cemented in crucible small opening bottom;
Described mozzle overcoat one end has external screw thread, and is connected on the length adjustment dish, and the other end is a male-tapered, between this mozzle inner core and the overcoat minim gap is arranged;
The male-tapered of described mozzle overcoat matches with the interior center taper hole of nozzle, and mozzle overcoat (and crucible) is supported and the location, and remainder does not contact with nozzle.Make mozzle inner core and overcoat concentric during installation.Screw thread by the length adjustment dish externally packs into the line length adjustment, makes the mozzle inner core concordant with the outer end of overcoat.
Compared with the prior art the present invention has following advantage:
1) economical with materials, pollution abatement reduces cost.Overcoat adopts the metal material processing of carbon steel and so on convenient, and low price can use again repeatedly.The pottery of inner core can simply be made simple tubulose, is convenient to make, and is with low cost.Because the protection of overcoat, ceramic inner core does not contact with the high speed cold air-flow, has reduced pollution, and heating status is significantly improved, and is difficult for bursting, even can repeatedly uses.
2) assembling safe ready.The restraint-type atomizing type requires very strict to the mutual alignment relation of nozzle and mozzle, mozzle carries out length adjustment by the screw thread between overcoat and the length adjustment dish, can make the ectonexine end concordant, the awl section of overcoat and the nozzle section of awl accordingly cooperate, and can guarantee the extension elongation of mozzle.And because the protection of metal-coating, ceramic inner core can be safe and sound, need not worry to fracture or damage.
3) the atomizing degree of superheat of melt significantly reduces, and the quality of alloy powder obviously improves.Composite construction mozzle inner core does not directly contact the high speed cold air-flow, and it is gapped heat insulation between the overcoat, overcoat only contacts with an awl section with nozzle, area of dissipation reduces, so can reduce the atomizing degree of superheat of melt significantly and reduce the danger gag somebody, the melt overheat degree can be reduced to below 200 ℃ by 250～400 ℃ of original single layer structure mozzle.After the melt overheat degree reduces, can effectively weaken the reaction with refractory materials such as crucible and mozzles, alleviate that composition pollutes and the oxidation of alloy powder, especially even more important for alloy with high activity.
Description of drawings
Fig. 1 is a U.S. Pat 4,631, the schematic diagram of 013 metal guiding device.
Among the figure: 1 is mozzle, and 2 is heat-barrier material, and 3 is nozzle, and 4 is the nozzle air inlet pipe.
Fig. 2 is a U.S. Pat 5,468, the schematic diagram of 133 metal guiding devices.
Among the figure: 5 is mozzle, and 6 is nozzle.
Fig. 3 is a metal guiding device schematic diagram of the present invention.
Among the figure: 7 is the mozzle inner core, and 8 is the length adjustment dish, and 9 is the mozzle overcoat, 10 is nozzle, and 11 is the nozzle air inlet pipe, and 12 is center taper hole in the nozzle, 13 are adjustment dish internal thread hole, and 14 is mozzle overcoat end external screw thread, and 15 is the minim gap between mozzle inner core and the overcoat.
The specific embodiment
Referring to shown in Figure 3, embodiment 1:
The present invention also provides a kind of device that reduces metal atomization flow guide system heat loss, and it is made up of length adjustment dish 8, mozzle inner core 7, mozzle overcoat 9;
Described length adjustment dish 8 is made with the A3 steel, is bonded in crucible bottom, and an internal thread hole 13 is arranged in the middle of the adjustment dish;
Described mozzle inner core 7 adopts Al
2O
3Material passes the center internal thread hole 13 of length adjustment dish 8, is cemented in crucible small opening bottom;
Described mozzle overcoat 9 adopts carbon steel or stainless steel, and an end has external screw thread 14, and is connected on the length adjustment dish 8, and the other end is a male-tapered, between this mozzle inner core 7 and the overcoat 9 minim gap 15 is arranged;
The male-tapered of described mozzle overcoat matches with the interior center taper hole 12 of nozzle 10, plays mozzle overcoat (and crucible) is supported and the effect of locating, and guarantee that mozzle stretches out the length of nozzle, and remainder does not contact with nozzle.Make mozzle inner core 7 concentric during installation with overcoat 9.Screw thread by length adjustment dish 8 carries out length adjustment to overcoat 9, makes mozzle inner core 7 concordant with the outer end of overcoat 9.
Embodiment 2:
Difference from Example 1 is that mozzle inner core 7 adopts ZrO
2Material.
Embodiment 3:
Be that with embodiment 1 and embodiment 2 differences mozzle inner core 7 adopts the BN material.
Embodiment 4:
Be that with the foregoing description difference mozzle inner core 7 adopts Si
3N
4Material.
Claims (8)
1, a kind of method that reduces metal atomization flow guide system heat loss is characterized in that: it adopts the version of composite flow guide pipe, utilizes the gap of mozzle inner core and overcoat, selects different materials and length adjustment structure for use;
Described composite flow guide pipe is meant that mozzle is a multilayer structure, is made of mozzle inner core and overcoat bilayer;
Described gap is meant gapped separating between mozzle inner core and the overcoat, and not directly contact, and the forward end of mozzle overcoat tapering contacts the location with nozzle, and remainder does not contact with nozzle;
The mozzle inner core can be selected different materials with overcoat, and overcoat is the intensity height, be easy to process, inexpensive material, inner core be high temperature resistant, thermal insulation good, inertia, be easy to process or the ceramic material of simple shape;
Described length adjustment structure is meant length that the mozzle inner core stretches out nozzle is stretched out nozzle by the mozzle overcoat length decision, and can be along appearance to moving between mozzle inner core and the overcoat, it is concordant with the outer end of overcoat to adjust the mozzle inner core, guarantees that whole mozzle stretches out the length of nozzle.
2, method according to claim 1 is characterized in that: described mozzle overcoat is preferentially selected carbon steel, stainless steel metal material, and the mozzle inner core is preferentially selected Al
2O
3, ZrO
2, BN, Si
3N
4Ceramic material.
3, method according to claim 1 is characterized in that: described length adjustment structure is that length with respect to inner core is fixed and adjusted to the mozzle overcoat by the screw thread of length adjustment dish, guarantees that the ectonexine end is concordant.
4, a kind of a kind of device that reduces metal atomization flow guide system heat loss of implementing aforesaid right requirement method, it is characterized in that: it is made up of length adjustment dish (8), mozzle inner core (7), mozzle overcoat (9);
Described length adjustment dish (8) is cemented in crucible bottom, and an internal thread hole (13) is arranged in the middle of the adjustment dish;
Described mozzle inner core (7) passes the center internal thread hole of length adjustment dish (8), is cemented in crucible small opening bottom;
Described mozzle overcoat (9) one ends have external screw thread (14), and are connected on the length adjustment dish (8), and the other end is a male-tapered, and minim gap (15) is arranged between this mozzle inner core and the overcoat;
The male-tapered of described mozzle overcoat (9) matches with the interior center taper hole (12) of nozzle (10).
5, the device of reduction metal atomization flow guide system heat loss according to claim 4 is characterized in that: described mozzle overcoat (9) adopts carbon steel or stainless steel, and mozzle inner core (7) adopts Al
2O
3Material.
6, the device of reduction metal atomization flow guide system heat loss according to claim 4 is characterized in that: described mozzle overcoat (9) adopts carbon steel or stainless steel, and mozzle inner core (7) adopts ZrO
2Material.
7, the device of reduction metal atomization flow guide system heat loss according to claim 4 is characterized in that: described mozzle overcoat (9) adopts carbon steel or stainless steel, and mozzle inner core (7) adopts the BN material.
8, the device of reduction metal atomization flow guide system heat loss according to claim 4 is characterized in that: described mozzle overcoat (9) adopts carbon steel or stainless steel, and mozzle inner core (7) adopts Si
3N
4Material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02159734 CN1219616C (en) | 2002-12-30 | 2002-12-30 | Method and device for reducing heat loss of metal atomizing flow guide system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02159734 CN1219616C (en) | 2002-12-30 | 2002-12-30 | Method and device for reducing heat loss of metal atomizing flow guide system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1511663A true CN1511663A (en) | 2004-07-14 |
| CN1219616C CN1219616C (en) | 2005-09-21 |
Family
ID=34237623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02159734 Expired - Fee Related CN1219616C (en) | 2002-12-30 | 2002-12-30 | Method and device for reducing heat loss of metal atomizing flow guide system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1219616C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101376172B (en) * | 2008-09-24 | 2010-12-01 | 上海大学 | Quadric injection metal atomization device of rotary-forming film |
| CN102527601A (en) * | 2012-03-02 | 2012-07-04 | 西安石油大学 | Preparation method for blocking preventing coating of spray head of atomizer |
| CN102528060A (en) * | 2012-02-29 | 2012-07-04 | 上海应用技术学院 | Atomizer capable with nozzle and flow guide tube prevented from blockage |
| CN102528058A (en) * | 2011-12-30 | 2012-07-04 | 上海应用技术学院 | Totally-enclosed gas atomizing powder making device for preventing high-melting-point substance from being blocked |
| CN102554246A (en) * | 2012-02-29 | 2012-07-11 | 上海应用技术学院 | Totally-enclosed gas-atomizing powder preparation device for solving blockage of nozzle and liquid guiding pipe caused by high-melting-point material |
| CN105618772A (en) * | 2016-02-01 | 2016-06-01 | 北京理工大学 | Supersonic atomizing nozzle with adjustable structure parameters |
| CN108436093A (en) * | 2018-04-23 | 2018-08-24 | 安徽哈特三维科技有限公司 | A kind of Supersonic atomizer preparing iron-based spherical metal powder using crucible gas atomization |
| CN112091227A (en) * | 2020-10-16 | 2020-12-18 | 天工爱和特钢有限公司 | Powder-making and mixing integrated equipment for powder die steel metallurgy production and use method thereof |
-
2002
- 2002-12-30 CN CN 02159734 patent/CN1219616C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101376172B (en) * | 2008-09-24 | 2010-12-01 | 上海大学 | Quadric injection metal atomization device of rotary-forming film |
| CN102528058A (en) * | 2011-12-30 | 2012-07-04 | 上海应用技术学院 | Totally-enclosed gas atomizing powder making device for preventing high-melting-point substance from being blocked |
| CN102528058B (en) * | 2011-12-30 | 2014-12-17 | 上海应用技术学院 | Totally-enclosed gas atomizing powder making device for preventing high-melting-point substance from being blocked |
| CN102528060A (en) * | 2012-02-29 | 2012-07-04 | 上海应用技术学院 | Atomizer capable with nozzle and flow guide tube prevented from blockage |
| CN102554246A (en) * | 2012-02-29 | 2012-07-11 | 上海应用技术学院 | Totally-enclosed gas-atomizing powder preparation device for solving blockage of nozzle and liquid guiding pipe caused by high-melting-point material |
| CN102528060B (en) * | 2012-02-29 | 2013-12-04 | 上海应用技术学院 | Atomizer capable with nozzle and flow guide tube prevented from blockage |
| CN102554246B (en) * | 2012-02-29 | 2015-02-11 | 上海应用技术学院 | Totally-enclosed gas-atomizing powder preparation device for solving blockage of nozzle and liquid guiding pipe caused by high-melting-point material |
| CN102527601A (en) * | 2012-03-02 | 2012-07-04 | 西安石油大学 | Preparation method for blocking preventing coating of spray head of atomizer |
| CN105618772A (en) * | 2016-02-01 | 2016-06-01 | 北京理工大学 | Supersonic atomizing nozzle with adjustable structure parameters |
| CN105618772B (en) * | 2016-02-01 | 2018-02-13 | 北京理工大学 | A kind of adjustable ultrasonic nebulization jet nozzle of structural parameters |
| CN108436093A (en) * | 2018-04-23 | 2018-08-24 | 安徽哈特三维科技有限公司 | A kind of Supersonic atomizer preparing iron-based spherical metal powder using crucible gas atomization |
| CN112091227A (en) * | 2020-10-16 | 2020-12-18 | 天工爱和特钢有限公司 | Powder-making and mixing integrated equipment for powder die steel metallurgy production and use method thereof |
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| Publication number | Publication date |
|---|---|
| CN1219616C (en) | 2005-09-21 |
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Assignee: Beijing Compo Solder Co., Ltd. Assignor: General Research Institute for Nonferrous Metals Contract fulfillment period: 2008.11.4 to 2022.11.3 Contract record no.: 2008990001437 Denomination of invention: Apparatus for reducing heat loss in metal atomization guiding system Granted publication date: 20050921 License type: Exclusive license Record date: 20081212 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.11.4 TO 2022.11.3; CHANGE OF CONTRACT Name of requester: BEIJING KANGPU XIWEI SOLDER CO., LTD. Effective date: 20081212 |
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Effective date of registration: 20190625 Address after: 101407 No. 11 Xingke East Street, Yanqi Economic Development Zone, Huairou District, Beijing Patentee after: Research Institute of engineering and Technology Co., Ltd. Address before: 100088 Research and Development Department of Beijing General Research Institute of Nonferrous Metals, No. 2 Waijie Street, Xinjiekou, Beijing Patentee before: General Research Institute for Nonferrous Metals |
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Granted publication date: 20050921 Termination date: 20201230 |