CN104959607A - Exhausting and sintering integration method and tool for implementing same - Google Patents
Exhausting and sintering integration method and tool for implementing same Download PDFInfo
- Publication number
- CN104959607A CN104959607A CN201510374403.7A CN201510374403A CN104959607A CN 104959607 A CN104959607 A CN 104959607A CN 201510374403 A CN201510374403 A CN 201510374403A CN 104959607 A CN104959607 A CN 104959607A
- Authority
- CN
- China
- Prior art keywords
- exhaust
- sintering
- blank
- conducting structure
- boat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
An exhausting and sintering integration method comprises the steps that a rough piece to be sintered is placed in a sintering boat to be sintered, the sintering boat is provided with an exhaust port, an exhaust conduction structure is arranged in the sintering boat, the outer wall outline is arranged to adapt to the inner cavity outline of the rough piece, an exhaust cavity is formed in the exhaust conduction structure and communicated with the outside world, exhaust holes which are formed in the surface of the exhaust conduction structure are communicated with the exhaust cavity, positioning is conducted on the exhaust conduction structure and the rough piece, sintering sand is laid on and filled into the sintering boat to exceed the top of the rough piece, and heating sintering and cooling are conducted. The invention provides an exhausting and sintering integration tool which implements the exhausting and sintering integration method. The tool comprises the sintering boat, the exhaust conduction structure, and the exhaust port is formed in the sintering boat; the exhaust conduction structure is installed in the sintering boat and comprises the exhaust cavity which is communicated with the outside world, the surface of the exhaust conduction structure is provided with exhaust through holes, and the outer wall outline of the exhaust conduction structure adapts to the inner cavity outline of the rough piece.
Description
Technical field
The present invention relates to a kind of exhaust sintering integratedization method of blank and implement the frock of the method.
Background technology
Powder metallurgy is a kind of near-purification formation of parts manufacturing technology of efficient, high-quality, precision, low-loss and energy-saving, but PM technique needs to add adhesive when finished parts geometric shape, thus in compressing process, improve the mobility of powder, simultaneously make again powder have higher viscosity, now make pressing pressure obtain in the powder more effectively and evenly transmission.Add adhesive and can improve the mobility of mixed-powder, fillibility and mouldability well, powder can evenly flow to each corner and not crack in pressing process, thus can make the geometric shape of high complexity.In powder sintered shaping process, at high temperature, decomposing or gasification can appear in adhesive from blank, thus makes part occur the phenomenons such as pore, cracking, finished product density skewness, so need to be exhausted degreasing to blank before blank sintering.
At present, blank to be exhausted and in sintering technology, exhaust and sintering are divided into two frock division step to carry out by first more using, secondly, in existing exhaust and sintering technology, generally find that distortion in various degree often appears in blank in high temperature environments, and then occur defect ware; If extension supporting structure on blank, then finding again can because being vented the phenomenons such as poor appearance pore in various degree, cracking, density unevenness on the wall that blank contacts with supporting construction, special in blank has inner-cavity structure, be vented the poor problem caused just more serious.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of exhaust sintering integratedization method, by the method, can realize the exhaust sintering integratedization operation of blank, and exhaust sintering effect is good.Secondly, the invention provides a kind of sintering integrated chemical industry dress of exhaust implementing said method.
For achieving the above object, exhaust sintering integratedization method provided by the present invention comprises blank to be sintered to insert in sintering boat and sinters, and described sintering offers exhaust outlet; Exhaust conducting structure is inserted in sintering boat, described exhaust conducting structure outer wall profile is set to adapt with blank inner chamber profile, this exhaust conducting structure offers discharge chamber, discharge chamber is in communication with the outside, be provided with steam vent on exhaust conducting structure surface to be communicated with discharge chamber, exhaust conducting structure is navigated to its outer wall profile and blank inner chamber profile to adapt position, sand burning is filled out at sintering boat middle berth, sand burning at least spreads filled out blank top, by above-mentioned sintering boat heat-agglomerating, cooling.In said method, blank is placed in sintering boat sinter, in sintering boat, be equipped with exhaust conducting structure outer wall profile and blank inner chamber profile adapt, on exhaust conducting structure, be provided with discharge chamber to be in communication with the outside simultaneously, be provided with steam vent on exhaust conducting structure surface to be communicated with discharge chamber, exhaust conducting structure being navigated to its outer wall profile and blank inner chamber profile adapts behind position, in sintering chamber, middle berth fills out sand burning, then now, because exhaust conducting structure outer wall profile and blank inner chamber profile adapt, so in the process of heat-agglomerating, the gas that then can realize the discharge of blank inner chamber by controlling suitable temperature is only needed to enter discharge chamber from the steam vent exhaust conducting structure, and then discharge sintering boat, heated the sintering of blank simultaneously, and in the process of exhaust sintering, the gas that blank outer wall produces can directly be discharged from the exhaust outlet sintering boat by sand burning, after this external paving fills out sand burning, the hole between sand seam and aperture are comparatively large for gas, and gas still can be discharged by sand slot apertures gap, and sand burning paving is filled out between exhaust conducting structure and blank, because exhaust conducting structure outer wall profile and blank inner chamber profile adapt, sand burning can form uniform sand body structure between exhaust conducting structure and blank, thus the sand burning that paving is filled out between exhaust conducting structure and blank can provide uniform holding power to blank, and then guarantee that blank there will not be in the process of exhaust sintering and add thermal deformation and affect quality.In the above-mentioned methods, can realize the operation of blank exhaust sintering integratedization, and can guarantee that blank has good exhaust effect, inwall particularly for blank has good exhaust effect, at the same time, can realize effectively supporting the structure of blank and preventing its heat distortion.
Further, described exhaust conducting structure outer wall profile and blank inner chamber profile adapt for: the vertical range being vented any distance closest approach between conducting structure outer wall profile and blank inner chamber profile is equal to each other.Further the radial vertical range between blank and exhaust conducting structure is set in 3-5 millimeter again.By said method, in blank inner chamber, any part can keep enough fully closing on and contacts with exhaust conducting structure, and then guarantees blank and be vented between conducting structure have enough good exhaust efficiency; Simultaneously, exhaust conducting structure outer wall and the profile between blank inwall can keep equal at a distance of closest approach vertical range mutual distance arbitrarily, then effectively can guarantee that the exhaust efficiency at each position of blank is consistent, avoid partial exhaust gas difference on effect and cause defect ware, thus making blank be exhausted through said method the finished product made after sintering there is the good uniformity; And by said method, fully can guarantee, between exhaust conducting structure outer wall and blank inner chamber, there is the enough close distance that adapts, thus after paving fills out sand burning, be enough to guarantee that sand burning has blank and support fixed effect preferably.
Further, steam vent is set to the consistent through hole in some apertures be evenly exhausted covered with exhaust conducting structure.By said method, and then guarantee that blank can be vented uniformly and effectively by exhaust conducting structure.
Further, described sand burning selects Al
2o
3or SiO
2particle, this sand burning granularity is 65 order to 10 orders.Sand burning selects Al
2o
3or SiO
2particle is due to Al
2o
3or SiO
2the particle made can meet the ventilation requirement of sintering process preferably, and there is excellent heat conductivility, thus realize each position of blank and be heated evenly, and the support that can complete preferably blank and sizing, to guarantee that in sintering process blank there will not be and add thermal deformation; Be 65 order to 10 orders by the Task-size Controlling of this sand burning be a parameter value comparatively optimized for the exhaust of sand burning, stressed sizing simultaneously.
Next the invention provides a kind of sintering integrated chemical industry dress of exhaust implementing said method.The sintering integrated chemical industry dress of this exhaust comprises sintering boat, exhaust conducting structure, and described sintering boat is provided with exhaust outlet; Exhaust conducting structure is installed in sintering boat, described exhaust conducting structure comprises cavity structure, this cavity structure is in communication with the outside, be vented conducting structure surface simultaneously and be provided with the through hole being communicated with cavity structure, described cavity structure is discharge chamber, through hole is steam vent, and the outer wall profile of this exhaust conducting structure and the inner chamber profile of blank adapt.Pass through said apparatus, can realize the operation of blank exhaust sintering integratedization, and can guarantee that blank has exhaust sintering integratedization effect and the sizing of realization to blank preferably: exhaust conducting structure comprises the discharge chamber of cavity structure, and this discharge chamber is in communication with the outside, the steam vent being communicated with cavity structure is provided with on discharge chamber surface, the outer wall profile of this exhaust conducting structure and the inner chamber profile of blank to be sintered adapt simultaneously, thus said method according to the present invention is after sintering chamber middle berth fills out sand burning, sintering boat is carried out the beneficial effect that heat-agglomerating can realize in above-mentioned exhaust sintering integratedization method.
Further, described sintering boat comprises dismountable upper end cover, and described exhaust outlet is positioned at upper end cover, and discharge chamber is in communication with the outside through upper end cover.Thus can by dismountable upper end cover carry out easily blank place with take out, sand burning spreads operations such as filling out; Exhaust outlet is installed in sintering boat upper end cover simultaneously, thus in a heated state, the gas that blank is discharged is easy to utilize the variable density under heating condition to enter to produce lift and discharges sintering boat from the exhaust outlet of top, accelerate the exhaust velocity of sintering boat, thus the dynamic equilibrium in acceleration of sintering boat is to being conducive to gas discharge direction to be carried out.
Further, the percent opening on described exhaust conducting structure is 40-80%, and steam vent is that some apertures are consistent, uniform through hole of arranging is distributed in exhaust conducting structure surface; This steam vent aperture is 0.1-1 millimeter.Steam vent on exhaust conducting structure is set to arrangement evenly, aperture is consistent, quantity is some, thus guarantees that each position of blank inner chamber both can have the exhaust efficiency of relatively uniformization in exhaust sintering process; Steam vent aperture is 0.1-1 millimeter, and the percent opening on exhaust conducting structure is 40-80%, can guarantee, between discharge chamber and blank, there is good exhaust efficiency and now the paving of sand burning to fill out effect better; Now, only need to adopt the sand burning of suitable particle size namely can guarantee to have good exhaust efficiency between discharge chamber and blank and now the paving of sand burning is filled out respond well.
Further, described frock is provided with positioner.Thus realize blank and locate be loaded into preposition with exhaust conducting structure.
In said method and frock, can realize the operation of blank exhaust sintering integratedization, and can guarantee that blank has good exhaust effect, inwall particularly for blank has good exhaust effect, at the same time, can realize effectively supporting the structure of blank and preventing its heat distortion.
Accompanying drawing explanation
Fig. 1 is that a kind of frock implementing to be vented sintering integratedization method partly cuts open figure.
Fig. 2 is that the A-A of frock in Fig. 1 is to sectional view.
Fig. 3 is the upper end cover schematic diagram of frock in Fig. 1.
Detailed description of the invention
As shown in Figure 1, Figure 2 and Figure 3 a kind of implements the frock being vented sintering integratedization method, during the degreasing sintered integration of chimney filter blank using it for a kind of powder metallurgy pressing is produced.
This frock is for comprising sintering boat 2, exhaust conducting structure 3; Wherein sintering boat 2 is cylindrical cavity structure, and blank 1 to be sintered is placed in cavity, and described blank 1 is chimney filter blank, and this chimney filter blank is tubular structure.
Sintering boat 2 upper end cover 202 is provided with exhaust outlet 201, in the present embodiment, as shown in Figure 3, exhaust outlet 201 comprises the first row gas port 2011 being positioned at sintering boat 2 upper end cover 202 center, also comprise that to be enclosed in first row gas port 2011 periphery be satellite around some second exhaust port 2012, described first row gas port 2011 aperture is slightly less than chimney filter blank caliber, second exhaust port 2012 is installed on upper end cover 202 and carries out auxiliary exhaust by peripheral position, in the present embodiment, second exhaust port 2012 is mainly used in the outer wall exhaust of blank 1; Sintering boat 2 upper end cover 202 is detachable.Exhaust conducting structure 3 is installed in sintering boat 2 for tubular structure, and be fixed on the center, lower surface of sintering boat 2, described exhaust conducting structure 3 caliber is slightly less than chimney filter blank caliber, this exhaust conducting structure 3 is made for high temperature resistant rigid material, and the material being vented conducting structure 3 in the present embodiment adopts stainless steel; This exhaust conducting structure 3 comprises discharge chamber 301 and steam vent 302; Described discharge chamber 301 is the cavity structure of exhaust conducting structure 3, steam vent 302 is that some arrangements that exhaust conducting structure 3 surface is offered are even, the consistent through hole in aperture, described through hole runs through exhaust conducting structure 3 and is communicated with described cavity structure, namely steam vent 302 is communicated with discharge chamber 301, and described discharge chamber 301 is communicated with sintering boat 2 upper end first row gas port 2011, and discharge chamber 301 and first row gas port 2011 are connected; Meanwhile, steam vent 302 aperture on exhaust conducting structure 3 is 0.8 millimeter, and the percent opening on exhaust conducting structure 3 is 70%.In the frock of above-described embodiment, at exhaust conducting structure 3 near the outer wall of bottom position, arrange positioner 4, this positioner 4 is for being looped around the annular sheet on exhaust conducting structure 3 outer wall, and this annular sheet is that level is installed.
In the frock of the present embodiment, blank 1 is inserted in sintering boat 2, be set in outside exhaust conducting structure 3 by chimney filter blank, just exhaust conducting structure 3 can be placed on the positioner 4 of bottom position, above-mentioned exhaust conducting structure 3 caliber is slightly less than chimney filter blank, in the present embodiment specifically, the vertical range between the outer wall of exhaust conducting structure 3 and blank 1 inwall is controlled to be 4 millimeters, now, conducting structure 3 is vented through chimney filter blank inner chamber; Again by 12 object SiO
2sand burning uniform spreading is filled in sintering boat 2, and sand burning uniform spreading is filled up sintering boat 2 cavity.The upper end cover 202 of sintering boat 2 is filled on sintering boat 2, first row gas port 2011 is coordinated with discharge chamber 301, sintering boat 2 is inserted design temperature and heats, be vented after sintering completes until blank 1 and cool taking-up.
The frock of the exhaust sintering integratedization method in the present embodiment and enforcement the method, except in the degreasing sintered integration production of the chimney filter blank that can be applied in above-mentioned powder metallurgy pressing, the blank 1 also made can be applicable to other powder metallurgy be vented sintering integratedization produce in, and can be used in blank 1 be vented sintering integratedization production in.Only need blank 1 to be placed in sintering boat 2, exhaust conducting structure 3 outer wall profile and blank 1 inner chamber profile are set and adapt, and exhaust conducting structure 3 is provided with discharge chamber 301 and steam vent 302, implement in production in reality, according to the shape and size of blank 1, the shape profile of exhaust conducting structure 3 and the radial vertical range between blank 1 and exhaust conducting structure 3 are set, in actual production, consider that each position of blank 1 is evenly vented, be then adapt the outer wall profile design of discharge chamber 301 with the inner chamber profile of blank 1 as far as possible, thus the exhaust efficiency that blank 1 has had in sintering process can be completed, simultaneously after filling sand burning, while being exhausted, also can prevent blank 1 from deformation occurring, complete exhaust sintering integratedization.This kind of method and frock tackle inner chamber especially has the blank 1 of the larger degree of depth to be vented sintering integratedization process, there is obviously advantage, can realize being vented sintering integratedization operation to blank 1, and can guarantee that blank 1 has good exhaust effect, inwall particularly for blank 1 has good exhaust effect, at the same time, can realize effectively supporting the structure of blank 1 and preventing its heat distortion.
Claims (10)
1. be vented sintering integratedization method, comprise blank (1) to be sintered to insert in sintering boat (2) and sinter, described sintering (2) is offered exhaust outlet (201), it is characterized in that: in sintering boat (2), insert exhaust conducting structure (3), described exhaust conducting structure (3) outer wall profile is set to adapt with blank (1) inner chamber profile, this exhaust conducting structure (3) offers discharge chamber (301), discharge chamber (301) is in communication with the outside, be provided with steam vent (302) on exhaust conducting structure (3) surface to be communicated with discharge chamber (301), conducting structure (3) will be vented navigate to its outer wall profile and blank (1) inner chamber profile and to adapt position, sand burning is filled out at sintering boat (2) middle berth, sand burning at least spreads filled out blank (1) top, by above-mentioned sintering boat (2) heat-agglomerating, cooling.
2. exhaust sintering integratedization method as claimed in claim 1, is characterized in that: described exhaust conducting structure (3) outer wall profile and blank (1) inner chamber profile adapt for: the vertical range being vented any distance closest approach between conducting structure (3) outer wall profile and blank (1) inner chamber profile is equal to each other.
3. exhaust sintering integratedization method as claimed in claim 2, is characterized in that: the radial vertical range between blank (1) and exhaust conducting structure (3) is set in 3-5 millimeter.
4. exhaust sintering integratedization method as claimed in claim 1, is characterized in that: steam vent (302) is set to the consistent through hole in some apertures and is evenly exhausted covered with exhaust conducting structure (3).
5. exhaust sintering integratedization method as claimed in claim 1, is characterized in that: described sand burning selects Al
2o
3or SiO
2particle, this sand burning granularity is 65 order to 10 orders.
6. implement the claims the frock being vented sintering integratedization method described in 1, comprise sintering boat (2), exhaust conducting structure (3), described sintering boat (2) is provided with exhaust outlet (201); It is characterized in that: exhaust conducting structure (3) is installed in sintering boat (2), described exhaust conducting structure (3) comprises cavity structure, this cavity structure is in communication with the outside, be vented conducting structure (3) surface simultaneously and be provided with the through hole being communicated with cavity structure, described cavity structure is discharge chamber (301), through hole is steam vent (302), and the outer wall profile of this exhaust conducting structure (3) and the inner chamber profile of blank (1) adapt.
7. the sintering integrated chemical industry dress of exhaust as claimed in claim 6, it is characterized in that: described sintering boat (2) comprises dismountable upper end cover (202), described exhaust outlet (201) is positioned at upper end cover (202), and discharge chamber (301) is in communication with the outside through upper end cover (202).
8. the sintering integrated chemical industry dress of exhaust as claimed in claim 6, it is characterized in that: the percent opening on described exhaust conducting structure (3) is 40-80%, steam vent (302) is for some apertures are consistent, uniform through hole of arranging is distributed in exhaust conducting structure (3) surface.
9. the sintering integrated chemical industry dress of exhaust as claimed in claim 8, is characterized in that: described steam vent (302) aperture is 0.1-1 millimeter.
10. the sintering integrated chemical industry dress of exhaust as claimed in claim 6, is characterized in that: described frock is provided with positioner (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510374403.7A CN104959607B (en) | 2015-06-30 | 2015-06-30 | Exhausting and sintering integration method and tool for implementing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510374403.7A CN104959607B (en) | 2015-06-30 | 2015-06-30 | Exhausting and sintering integration method and tool for implementing same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104959607A true CN104959607A (en) | 2015-10-07 |
| CN104959607B CN104959607B (en) | 2017-05-17 |
Family
ID=54213784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510374403.7A Active CN104959607B (en) | 2015-06-30 | 2015-06-30 | Exhausting and sintering integration method and tool for implementing same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104959607B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL278935A (en) * | 1961-05-26 | |||
| JP2007290893A (en) * | 2006-04-24 | 2007-11-08 | National Institute Of Advanced Industrial & Technology | Porous formed body and its method for producing the same |
| CN201744655U (en) * | 2010-07-30 | 2011-02-16 | 宁波同创强磁材料有限公司 | Sintering basin |
| CN202066358U (en) * | 2011-05-16 | 2011-12-07 | 张作州 | Permanent magnetic material agglomeration boat |
| CN202106032U (en) * | 2011-05-19 | 2012-01-11 | 成都斯锐特钨钢刀具有限公司 | Graphite boat for round cutter sintering |
| CN202296803U (en) * | 2011-09-30 | 2012-07-04 | 成都易态科技有限公司 | Lifting appliance, high-temperature sintering container and high-temperature sintering fixture |
| CN202343939U (en) * | 2011-09-30 | 2012-07-25 | 成都易态科技有限公司 | Anti-swelling sintering fixture |
| CN203794967U (en) * | 2014-04-02 | 2014-08-27 | 青岛优麦斯新型材料有限公司 | Graphite boat |
| CN104289710A (en) * | 2014-09-30 | 2015-01-21 | 许用华 | Graphite sintering box with exhausting and sealing functions |
| CN104321605A (en) * | 2012-03-16 | 2015-01-28 | Gkn金属烧结控股有限责任公司 | Sintering furnace with a gas removal device |
| CN204818065U (en) * | 2015-06-30 | 2015-12-02 | 成都易态科技有限公司 | Exhaust sintering integration frock |
-
2015
- 2015-06-30 CN CN201510374403.7A patent/CN104959607B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL278935A (en) * | 1961-05-26 | |||
| JP2007290893A (en) * | 2006-04-24 | 2007-11-08 | National Institute Of Advanced Industrial & Technology | Porous formed body and its method for producing the same |
| CN201744655U (en) * | 2010-07-30 | 2011-02-16 | 宁波同创强磁材料有限公司 | Sintering basin |
| CN202066358U (en) * | 2011-05-16 | 2011-12-07 | 张作州 | Permanent magnetic material agglomeration boat |
| CN202106032U (en) * | 2011-05-19 | 2012-01-11 | 成都斯锐特钨钢刀具有限公司 | Graphite boat for round cutter sintering |
| CN202296803U (en) * | 2011-09-30 | 2012-07-04 | 成都易态科技有限公司 | Lifting appliance, high-temperature sintering container and high-temperature sintering fixture |
| CN202343939U (en) * | 2011-09-30 | 2012-07-25 | 成都易态科技有限公司 | Anti-swelling sintering fixture |
| CN104321605A (en) * | 2012-03-16 | 2015-01-28 | Gkn金属烧结控股有限责任公司 | Sintering furnace with a gas removal device |
| CN203794967U (en) * | 2014-04-02 | 2014-08-27 | 青岛优麦斯新型材料有限公司 | Graphite boat |
| CN104289710A (en) * | 2014-09-30 | 2015-01-21 | 许用华 | Graphite sintering box with exhausting and sealing functions |
| CN204818065U (en) * | 2015-06-30 | 2015-12-02 | 成都易态科技有限公司 | Exhaust sintering integration frock |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104959607B (en) | 2017-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102123850B (en) | Frame for a device for producing a three-dimensional object, and device having such a frame for producing a three-dimensional object | |
| CN208146917U (en) | A kind of metal 3D printing powder preheating device | |
| CN104439238A (en) | High-temperature high-pressure powder near-net forming method of aluminum alloy thin-wall cross-shaped rib plate structure | |
| CN103111619A (en) | Hot isostatic pressing two-step forming method of high temperature alloy compact piece | |
| CN104707931A (en) | Manufacturing method for large high-temperature alloy disk-type die forging parts | |
| CN112436250B (en) | Port coupling structure of microwave dielectric waveguide filter | |
| US8931544B2 (en) | Refractory mold | |
| CN107588672A (en) | A kind of equalizing plate structure and its manufacture method | |
| CN105132732A (en) | Preparation method for foamed aluminum with adjustable pore structure | |
| CN105728708A (en) | Production method of high-density long-life tungsten-molybdenum alloy crucible | |
| CN204818060U (en) | Design exhaust frock | |
| CN204818065U (en) | Exhaust sintering integration frock | |
| CN104959607A (en) | Exhausting and sintering integration method and tool for implementing same | |
| CN111985059B (en) | Part forming method and system based on additive manufacturing and hot isostatic pressing | |
| US8936066B2 (en) | Method of using a refractory mold | |
| CN107225238B (en) | A kind of manufacturing method of the mold based on lamination powder pressing forming technique | |
| CN104972116A (en) | Shaping exhausting method and tool for carrying out the same | |
| CN106735191A (en) | A kind of method for preparing Powder High-speed Steels | |
| CN104135821B (en) | The manufacture method of multilayer co-firing ceramic circuit board and multilager base plate with structure compensation region | |
| US20180266327A1 (en) | Flow devices and methods of making the same | |
| CN102489705A (en) | Method for producing metal hollow balls | |
| CN107999702B (en) | Ceramic core sintering molding process | |
| CN208592385U (en) | A kind of graphite jig for hot pressed sintering | |
| CN205957694U (en) | Vacuum sintering furnace | |
| CN102135384A (en) | Structure of isothermal board and method for manufacturing isothermal board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |