CN1232374C - Fritting furnace - Google Patents
Fritting furnace Download PDFInfo
- Publication number
- CN1232374C CN1232374C CN 01104954 CN01104954A CN1232374C CN 1232374 C CN1232374 C CN 1232374C CN 01104954 CN01104954 CN 01104954 CN 01104954 A CN01104954 A CN 01104954A CN 1232374 C CN1232374 C CN 1232374C
- Authority
- CN
- China
- Prior art keywords
- sintering furnace
- furnace according
- shell
- sintering
- sandwith layer
- 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.)
- Expired - Fee Related
Links
- 238000005245 sintering Methods 0.000 claims abstract description 72
- 238000001816 cooling Methods 0.000 claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000002826 coolant Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 239000012212 insulator Substances 0.000 claims 3
- 238000000034 method Methods 0.000 abstract description 17
- 239000011261 inert gas Substances 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 12
- 230000014509 gene expression Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 206010048669 Terminal state Diseases 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 210000003101 oviduct Anatomy 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
- B22F3/15—Hot isostatic pressing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
- F27B21/04—Sintering pots or sintering pans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D9/00—Cooling of furnaces or of charges therein
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Powder Metallurgy (AREA)
- Tunnel Furnaces (AREA)
- Furnace Details (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
This invention related to a sinter stove. After sintering process, it become cooling quickly. Immit circular inert gases to sinter stove, and transfers its quantity of heat to a heat exchanger, so accelerate it to be colling.
Description
Technical field
The present invention relates to a kind of sintering furnace.
Background technology
Sintering can be divided into vacuum-sintering, low pressure sintering, HIP sintering (HIP-sintering) or overvoltage sintering.
The shortcoming of overpressure sintering furnace is that it needs long cool time.From 50bar, 1500 ℃ drop to 30bar, 80 ℃ of need continue about 7 hours.Sintering furnace can not use in the meantime, and the staff can only wait for, usually can not do other work.
Summary of the invention
The purpose of this invention is to provide a kind of sintering furnace that shortens cool time, particularly HIP sintering stove.The technical solution of above-mentioned purpose is a kind of sintering furnace, a kind of cooling sandwith layer that it has a kind of cooling medium and causes gas to move in sintering furnace, gas is transferred to cooling medium with heat, and described cooling sandwith layer is asymmetricly arranged along the trunnion axis and/or the vertical axis of sintering furnace.
Sintering furnace of the present invention can promptly cool off after sintering process finishes.Feed inert gas and form circulation in sintering furnace, inert gas is transferred to a heat exchanger with its heat, has quickened cooling thus.
Special benefits of the present invention is just to quicken the cooling of sintering furnace with simple measure.Only the asymmetric arrangement by cooling system in stove makes gas self produce convection current, and it plays the forced cooling device effect.
Description of drawings
The present invention is described in further detail below in conjunction with form of implementation of the present invention among accompanying drawing and the figure.
Fig. 1 a is the cooling of common sintering furnace and the cooling raio temperature changing process of the sintering furnace according to the present invention.
Fig. 1 b is the cooling of common sintering furnace and the cooling raio pressure change procedure of the sintering furnace according to the present invention.
Fig. 2 is the perspective view of a sintering furnace.
Fig. 3 is the sintering furnace among Fig. 2, the front view when door opened.
Fig. 4 is the detailed maps according to the internal structure of sintering furnace of the present invention.
The specific embodiment
In Fig. 1 a, shown at a common sintering furnace and a temperature changing process according to sintering furnace of the present invention.
Fig. 1 b shows pressure-time-varying process similarly.The temperature course curve is divided into a plurality of paragraphs.Paragraph by Reference numeral 1 and 2 expressions shows heating process, promptly in this stage, the material of sintering to be heated to as 1370 ℃ by 0 ℃.This stage continues for example 4 hours.Then kept about 2 hours down for 1370 ℃ in the outlet temperature that arrives.This stage is the paragraph of representing with Reference numeral 2 and 3 in Fig. 1 a.
After about 90 minutes, shown in curve II among Fig. 1 b, pressure is brought up to about 500MPa by 0 in the outlet temperature that reaches Reference numeral 2 expressions.Pressure improves by Reference numeral 4 and 5 expressions.At common sintering furnace with according to the temperature and pressure change procedure of sintering furnace of the present invention, the pressure spot of the time point of the point 3 in Fig. 1 a or 8 expressions of the point in Fig. 1 b, two-lines all is parallel.
In back to back cooling stage, corresponding curve extension separated from each other.This in Fig. 1 a with Reference numeral III or IV represents and represent with Reference numeral V and VI in Fig. 1 b.This moment, curve III or V represented the temperature and pressure change procedure of common sintering furnace, and curve IV and VI represent the temperature and pressure change procedure according to sintering furnace of the present invention.
In cooling stage, the temperature in the operation of common sintering furnace drops to a little 6 by point 3, drops to a little 7 more therefrom.And according to the cooling procedure of sintering furnace of the present invention, temperature that different is drops to a little 12 by point 3 by putting 11.Can see that at this outlet temperature of point 12 is identical with the outlet temperature of point 7, wherein according to sintering furnace of the present invention, corresponding to curve IV, reaches cooling quickly.
At the point 6 of curve III or IV or to put that the curve that occurs in 11 fractures be the door opened result of oviduct.
Corresponding to temperature displayed change procedure in Fig. 1 a, what show in Fig. 1 b is the pressure change procedure.In the cooling procedure of common sintering furnace, pressure drops to a little 10 by point 8 by putting 9, and the cooling procedure of sintering furnace drops to a little 14 by putting 8 by putting 13 according to the present invention.Wherein can see, reach terminal state when cooling off quickly according to the common sintering furnace of the pressure ratio of sintering furnace of the present invention.
Fig. 2 represents the perspective view of sintering furnace 20.The profile of sintering furnace is cylindrical, and it is placed on the support 21.A fire door 22 is arranged in the front of stove, and it can rotate around hinge 23.
Fig. 3 is same sintering furnace 20, is its front schematic view, and this moment, fire door 22 was opened.Wherein can see a charging chamber 24, in whole sintering process, material to be sintered is placed on this chamber.Charging chamber 24 by thermo-responsive body 25 round, and it around calandria 26 arranged.In a replacement scheme of the present invention, thermo-responsive body 25 can cut.Around heater 26, laid an insulative cylinders body 27.In Fig. 4, can see the detailed internal structure of sintering furnace 20.
Fig. 4 is the schematic cross-section that has the charging chamber 24 of surrounding structure spare.This front view is corresponding with front view 3 haply, just removes fire door 22 herein.Columniform sintering furnace 20 is placed on the support 21, and it has two pillars arranged side by side 30,31.Box hat 32 has been formed the shell of sintering furnace 20.32 very little spacing places have settled another box hat 33 with one heart from box hat.Between outer steel shell 32 and steel inner casing 33, cooling medium 34 is arranged, as cooling water.
Arranged an insulative cylinders body 27 with one heart with outer steel shell 32, it is made by a kind of graphite and sludge laminate.Insulative cylinders body 27 is being supported by three binding posts 35,36,37, and they are used for carrying electric current to calandria 26 simultaneously.These binding posts 35,36,37 pass box hat 33,32 and outwards lead and be provided with cable connector 38,39,40.What be connected with cable connector 38,39,40 is two- phase cable 41,42,43, for example connects the alternating current of 50V alternating voltage and 3500A.A protection box 44,45,46 is all arranged around the tie point between each cable 41 to 43 and the cable connector 38 to 40.Two carriages 47,48 extend into the inside in sintering zone, place material 49 to be sintered on carriage.The columniform thermo-responsive body 25 of sintering feed 49 usefulness surrounds, there are three calandrias 50,51,52 lower area and side area at it, each calandria all has four heating rods 53,54,55,56 or 57,58,59,60 or 61,62,63,64, they are advanced by leaps and bounds in the diagrammatic sketch plane, and interconnect with the conduction bridge plate.Be provided with a so-called cooling sandwith layer between insulative cylinders body 27 and steel inner casing 33, it is made up of for example two- layer graphite 65,66 and layer of copper 57.This cooling sandwith layer 65,66,67 uses as heat exchanger.Concerning cooling sandwith layer is formed mainly is copper layer 57.
For the temperature of monitoring between box hat 32,33 is provided with a plurality of temperature sensors 68,69,70.The adjusting temperature sensor 71,72 that can measure sintering zone 24 internal temperatures is set in addition.
The method of operating of the sintering furnace of representing among following narration Fig. 4 20:
Leading to electric current on the calandria 26, make its heating.The heat that is produced by heater 26 distributes to the charging chamber 24 of placing sintering feed 49 by thermo-responsive body 25.Upper area at thermo-responsive body 25 is not provided with heater, because heat that should the zone upwards distributes basically invalidly.The temperature of charging chamber 24 is pressed temperature displayed conditional curve rising among Fig. 1 a.Though by the insulative cylinders body 27 that graphite-sludge laminate is formed, heater 26 is also to outer steel shell direction distribute heat.And this is undesirable, because do not wish oven enclosure, and will keep tangibly temperature.See through heat that insulative cylinders body 27 outwards distributes and arrive intermediate space 75 between insulative cylinders body 27 and the steel inner casing 33.In intermediate space 75 gas is arranged, as argon gas or nitrogen, they use as temperature carrier.These gases are transferred to cooling sandwith layer 65,66,67 and cooling medium 34 in the intermediate space with their heat.
Because the gas of heat is constantly to rising, and cold gas has produced convection current at intermediate space 75 like this to decline, it is by arrow 80,81 expressions.Because therefore the convection current of this enhancing realizes cooling rapidly.Flowing of convection gas strengthened in the asymmetric especially arrangement of cooling sandwith layer 65,66,67.65,66,67 upper areas that are located at sintering furnace 20 of cooling sandwith layer, relative y axle of their arrangement and z axle all are asymmetric.The position of cooling sandwith layer 65,66,67 starts from the place, α angle on z axle right side, ends at the place, β angle in Z axle left side, and the order of magnitude at α angle herein is that 40 ° of orders of magnitude with the β angle are 15 °.Can be regarded as, cooling sandwith layer also can be made and α angle or β angle also can be other numerical value by other material herein.
Asymmetric layout by cooling sandwith layer, cool off soon at the inert gas of sintering furnace 20 left-hand components than the inert gas of right-hand component, consequence thus is the gas circulation that produces along arrow 80,81 directions, and its reason is that the gas of the violent cooling on the left side is upwards pressed to the hot gas on decline and the right.The α that draws in Fig. 4, β angle are one and give an example.Best angle can be by calculating, as the computational methods by finite element.Finite Element Method be a kind of applied computer research at first complexity, can not structural member analytical calculation, that loaded in stress and problem on deformation, but it also can be applicable to study the problem in the fluid.The formation that strengthens the convective flow of inert gas mainly is owing to the asymmetric arrangement of cooling with respect to the y axle, and promptly α angle does not on the right allow on the left side to occur again.
On this meaning, about asymmetric arrangement and do not mean that cooling sandwith layer always has only one, and tilt to the y axle.Replacement scheme of the present invention also can be to be interrupted near the y axle as cooling sandwith layer, and a little cooling sandwith layer is set on the right, and on the left side is provided with a bigger cooling sandwith layer.
Claims (13)
1, sintering furnace is characterized in that,
1.1 a cooling medium (34) and
1.2 a kind of cooling sandwith layer (65-67) that causes gas to move in sintering furnace, gas is transferred to cooling medium with heat, and described cooling sandwith layer (65-67) is asymmetricly arranged along the trunnion axis and/or the vertical axis of sintering furnace (20).
2, sintering furnace according to claim 1 is characterized in that,
2.1 a shell (32),
2.2 a charging chamber (24),
2.3 a calandria (26), it is round the charging chamber (24) at least partly.
3, sintering furnace according to claim 2 is characterized in that,
3.1 between calandria (26) and shell (32), have a heat insulator (27) and
3.2 a gassiness space (75) is arranged between calandria (26) and shell (32).
4, sintering furnace according to claim 1 is characterized in that, described cooling sandwith layer (65-67) only is installed in the top, charging chamber (24) of sintering furnace (20).
5, sintering furnace according to claim 1 is characterized in that, by convection carries out the motion of gas.
6, sintering furnace according to claim 1 is characterized in that, described cooling sandwith layer (65-67) contains copper and/or graphite.
7, sintering furnace according to claim 2 is characterized in that, the shell of sintering furnace (32) is a columniform box hat.
8, sintering furnace according to claim 7 is characterized in that, a cylindrical plate (33) is placed at the place from the inboard certain spacing of cylindrical steel.
9, sintering furnace according to claim 2 is characterized in that, a thermo-responsive body (25) is round the charging chamber (24), at least on the subregion of thermo-responsive external side round calandria (26).
10, sintering furnace according to claim 9 is characterized in that, an insulator (27) is round thermo-responsive body (25), and heater (26) is positioned between thermo-responsive body (25) and the insulator (27).
11, sintering furnace according to claim 2 is characterized in that, the shape of stove outer covering (32) is columniform, and the longitudinal axis of stove outer covering all is parallel to ground.
According to the sintering furnace of claim 11, it is characterized in that 12, shell (32) is placed on the support (21), have the carriage (47,48) of supporting sintering feed (49), these carriages are advanced by leaps and bounds in the charging chamber (24).
According to the sintering furnace of claim 1, it is characterized in that 13, described cooling sandwith layer (65-67) is placed in the upper area of shell (32).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2000108694 DE10008694A1 (en) | 2000-02-24 | 2000-02-24 | Sintering furnace |
| DE10008694.2 | 2000-02-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1311424A CN1311424A (en) | 2001-09-05 |
| CN1232374C true CN1232374C (en) | 2005-12-21 |
Family
ID=7632261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01104954 Expired - Fee Related CN1232374C (en) | 2000-02-24 | 2001-02-23 | Fritting furnace |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1127639A3 (en) |
| CN (1) | CN1232374C (en) |
| DE (1) | DE10008694A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9358747B2 (en) | 2007-12-14 | 2016-06-07 | Avure Technologies Ab | Hot isostatic pressing arrangement |
| CN104110963B (en) * | 2014-07-21 | 2016-08-24 | 洛阳西格马炉业股份有限公司 | A kind of high temperature air pressure sintering furnace |
| EP3518258A4 (en) * | 2016-09-23 | 2020-06-24 | Nitto Denko Corporation | Method for manufacturing sintered body for forming sintered magnet, and method for manufacturing permanent magnet using sintered body for forming sintered magnet |
| CN108253790B (en) * | 2018-04-01 | 2024-07-26 | 浙江中科尚弘离子装备工程有限公司 | A sintering furnace for composite reinforcement materials used in the production of silicon aerogel insulation felt |
| CN109732091B (en) * | 2019-03-01 | 2023-09-08 | 宁波恒普技术股份有限公司 | Pressure sintering furnace and partition heating device thereof |
| CN117464006B (en) * | 2023-12-28 | 2024-03-12 | 湘潭大学 | Multi-zone control vacuum sintering furnace and temperature field and atmosphere field control method thereof |
| CN120907328B (en) * | 2025-10-10 | 2026-01-06 | 嘉兴精科科技有限公司 | Equipment and process for sintering titanium alloys using a graphite vacuum sintering furnace |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS589806B2 (en) * | 1977-03-30 | 1983-02-23 | 住友電気工業株式会社 | Sintering furnace for powder metallurgy |
| DE3443664A1 (en) * | 1984-11-30 | 1986-06-05 | Thyssen Guss AG Feingusswerk Bochum, 4630 Bochum | METHOD AND DEVICE FOR QUICK COOLING A HIP SYSTEM |
| DE3625788A1 (en) * | 1986-07-30 | 1988-02-04 | Degussa | HIGH PRESSURE INTEROF |
| DE3833337A1 (en) * | 1988-09-30 | 1990-04-05 | Dieffenbacher Gmbh Maschf | Apparatus for rapid cooling of workpieces and of the pressure container in an HIP plant |
| US6352430B1 (en) * | 1998-10-23 | 2002-03-05 | Goodrich Corporation | Method and apparatus for cooling a CVI/CVD furnace |
-
2000
- 2000-02-24 DE DE2000108694 patent/DE10008694A1/en not_active Withdrawn
-
2001
- 2001-02-15 EP EP01103716A patent/EP1127639A3/en not_active Withdrawn
- 2001-02-23 CN CN 01104954 patent/CN1232374C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP1127639A2 (en) | 2001-08-29 |
| DE10008694A1 (en) | 2001-08-30 |
| CN1311424A (en) | 2001-09-05 |
| EP1127639A3 (en) | 2003-01-22 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051221 Termination date: 20150223 |
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| EXPY | Termination of patent right or utility model |