CN103352199A - High purity aluminizing furnace - Google Patents
High purity aluminizing furnace Download PDFInfo
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- CN103352199A CN103352199A CN2013102788043A CN201310278804A CN103352199A CN 103352199 A CN103352199 A CN 103352199A CN 2013102788043 A CN2013102788043 A CN 2013102788043A CN 201310278804 A CN201310278804 A CN 201310278804A CN 103352199 A CN103352199 A CN 103352199A
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Abstract
The invention relates to a high purity aluminizing furnace, which comprises an industrial electric furnace body and is characterized in that a stainless steel furnace pipe is arranged in a furnace chamber of the industrial electric furnace body, an inert gas delivery pipe and a thermoelectric couple get into the stainless steel furnace pipe from the opening of the furnace pipe, the overhanging edge of the opening of the furnace pipe is arranged at the opening of the electric furnace and is fixedly connected with the industrial electric furnace body through a screw and a pressure plate, a matched heat-resistant seal plug is arranged at the opening of the furnace pipe, a vacuum pumping pipe passes through the heat-resistant seal plug to be communicated with the inner part of the furnace pipe, and magnetic valves are arranged on the vacuum pumping pipe and the inert gas delivery pipe in a matching manner; radiating pipes are arranged on the vacuum pumping pipe and positioned at the exposure part of the heat-resistant seal plug in a matching manner, and the stainless steel furnace pipe sealed by the heat-resistant seal plug can bear the intensity of pressure ranging from -0.1Mpa to 0.25Mpa.
Description
Technical field
The present invention relates to a kind of aluminizing furnace, especially a kind of high purity aluminizing furnace.
Background technology
Aluminising makes the chemical heat treatment process in one or more atoms metals infiltration metal works top layers, after the aluminising of metal works top layer, can have good thermal fatigue resistance, high mechanical property is especially at high temperature not only arranged, also have high antioxidant property and erosion resistance and thermal fatigue property.This class workpiece is multiplex in gas turbine blades, engine exhaust system part, combustion chamber, or is in the Special Corrosion part that the severe environment such as alkali, seawater are used for processing.
Aluminizing furnace is the key part that the metal works top layer is carried out the aluminising thermo-chemical treatment, notification number is that the patent documentation of CN101463459B discloses a kind of aluminizing furnace, owing to have a large amount of reactive gass in the flue of this aluminizing furnace, very easily aluminium is oxidized in the aluminising process, be easy on the workpiece occur aluminium leak ooze, void is oozed, pin hole and the phenomenon such as peel off, and affects the aluminising quality.
How to improve the quality of alumetizing process, in the field of business, scientific and technical personnel have proposed new requirements at the higher level to aluminizing furnace, also are the key subjects that we need to pay close attention to.
Summary of the invention
The object of the invention is to, have a large amount of reactive gass in the courage for present aluminizing furnace, very easily aluminium is oxidized in the aluminising process, be easy on the workpiece occur aluminium leak ooze, void is oozed, pin hole and the phenomenon such as peel off, affect the practical problems of aluminising quality, a kind of new high purity aluminizing furnace is provided.
The object of the present invention is achieved like this: a kind of high purity aluminizing furnace, comprise the industrial electro body of heater, it is characterized in that, be provided with the stainless steel flue in the furnace chamber of industrial electro body of heater, rare gas element input tube and thermopair enter the stainless steel flue by the flue mouth, flying along placing on the electric furnace mouth of flue mouth, be fixedly connected with the industrial electro body of heater with pressing plate by screw rod, the flue mouth is provided with the heatproof sealing plug of coupling, vacuum-pumping tube passes through heatproof sealing plug and flue internal communication, is furnished with magnetic valve on vacuum-pumping tube and the rare gas element input tube; Be positioned on the vacuum-pumping tube of heatproof sealing plug exposed parts and be furnished with radiating pipe, the temperature degree of suction vacuum pump can not be too high when satisfying the high temperature aluminising, can be born-pressure that 0.1Mpa ~ 0.25Mpa changes by the stainless steel flue of heatproof sealing plug sealing.
Among the present invention, rare gas element input tube and thermopair are got over the heatproof sealing plug and are entered the stainless steel flue.
Among the present invention, the magnetic valve on the vacuum-pumping tube and vacuum pump power supply synchronization, this magnetic valve dead electricity is closed.
Among the present invention, after described rare gas element input tube entered the stainless steel flue, the air outlet was positioned at the stainless steel flue below 1/2nd.
Among the present invention, after described thermopair entered the stainless steel flue, its end was positioned at the stainless steel flue below 1/2nd.
Among the present invention, described furnace chamber bottom is provided with saddle, and stainless steel flue base part seat is on described saddle; Described heatproof sealing plug is made by refractory brick, and after the heatproof sealing plug was filled in the flue mouth, heatproof sealing plug and flue flew to be provided with high-temperature seal ring between the edge; Described radiating pipe is the water-cooling pipe, and described rare gas element input tube is linked up by inert gas purge machine and inertia source of the gas, and the purity inert gas of input is at least 99.999%.
Among the present invention, described flue adopts austenitic chromium nickel stainless steel to make, and its internal diameter is 700-900mm, and significant depth is 900-1100mm in the chamber, and the thickness of heatproof sealing plug is 300-400mm.Austenitic chromium nickel stainless steel can be selected the 310S stainless steel.
The invention has the advantages that: flue adopts the PPM grade stainless steel can be butted on chloride ion corrosion to make, and can be born-pressure that 0.1Mpa ~ 0.25Mpa changes by the stainless steel flue of heatproof sealing plug sealing; Because the flue mouth is provided with the heatproof sealing plug that refractory materials is made, be furnished with simultaneously vacuum-pumping tube and rare gas element input tube, can be by vacuumizing and topping up in high temperature aluminising process, can avoid aluminium generation oxidizing reaction in the aluminising process, impact is to the aluminising quality of workpiece to be machined; Because rare gas element adopts argon gas, before entering flue, argon gas purified by the inert gas purge machine, can prevent that impurity from bringing flue into by rare gas element, the purity inert gas that satisfies input is at least 99.999% technical indicator, further improves the purity of the aluminium that infiltrates workpiece; Because magnetic valve and vacuum pump power supply synchronization on the vacuum-pumping tube, this magnetic valve dead electricity is closed, can prevent effectively that vacuum pump from shutting down after, under the suction function in flue with the lubricating oil suction flue of outside air or vacuum pump; Owing to being furnished with radiating pipe on the vacuum-pumping tube that is positioned at heatproof sealing plug exposed parts, can effectively reduce the gas temperature that is inhaled into vacuum pump, guarantee that vacuum pump can work; The weight that the saddle of furnace chamber bottom can effectively carry flue and processing work, that improves the flue mouth flies edge and electric furnace mouth strained condition.
Description of drawings
Fig. 1 is the theory structure synoptic diagram of the embodiment of the invention.
Among the figure: 1, electric furnace body, 2, the stainless steel flue, 3, the rare gas element input tube, 4, thermopair, 5, the heatproof sealing plug, 6, vacuum-pumping tube, 7, magnetic valve, 8, radiating pipe, 9, saddle, 10, high-temperature seal ring, 11, the inert gas purge machine, 12, tensimeter, 13, vacuum pump.
Embodiment
Accompanying drawing discloses the theory structure of specific embodiments of the invention without limitation, below in conjunction with accompanying drawing the present invention is done to describe further.
As seen from Figure 1, the present invention includes industrial electro body of heater 1, be provided with stainless steel flue 2 in the furnace chamber of electric furnace body 1, rare gas element input tube 3 and thermopair 4 enter stainless steel flue 2 by the flue mouth, the edge that flies of flue mouth places on the electric furnace mouth, is fixedly connected with body of heater with pressing plate by screw rod, and the flue mouth is provided with the heatproof sealing plug 5 of coupling, vacuum-pumping tube 6 passes through heatproof sealing plug 5 and flue internal communication, is furnished with magnetic valve 7 on vacuum-pumping tube 6 and the rare gas element input tube 3; Be positioned on the vacuum-pumping tube 6 of heatproof sealing plug 5 exposed parts and be furnished with radiating pipe 8, can be born-pressure that 0.1Mpa ~ 0.25Mpa changes by the stainless steel flue 2 of heatproof sealing plug 5 sealings.
In the present embodiment, rare gas element input tube 3 and thermopair 4 enter stainless steel flue 2 by the flue mouth, after rare gas element input tube 3 enters stainless steel flue 2, the air outlet is positioned at the stainless steel flue below 1/2nd two, after thermopair 4 entered stainless steel flue 2, its end also was positioned at the stainless steel flue below 1/2nd.The furnace chamber bottom is provided with saddle 9, and stainless steel flue 2 base part seats are on saddle 9.
In the present embodiment, described heatproof sealing plug 5 is made by refractory brick, and after heatproof sealing plug 5 was filled in the flue mouth, heatproof sealing plug 5 and flue flew to be provided with high-temperature seal ring 10 between the edge; Also is furnished with tensimeter 12 on the vacuum-pumping tube 6.
During implementation, magnetic valve 7 and vacuum pump 13 power supply synchronizations on the vacuum-pumping tube 6, when vacuum pump 13 quit work, magnetic valve 7 synchronous dead electricity were closed.Described rare gas element input tube 3 and thermopair 4 enter stainless steel flue 2 after can also getting over heatproof sealing plug 5 again.Stainless steel flue 2 should adopt austenitic chromium nickel stainless steel to make, for example: the 310S stainless steel.The internal diameter of stainless steel flue 2 is 700-900mm, and significant depth is 900-1100mm in the chamber, and the thickness of heatproof sealing plug 5 is 300-400mm.Also should be furnished with pressure relief device on the industrial electro body of heater.
During implementation, radiating pipe 8 is the water-cooling pipe, and described rare gas element input tube 3 is linked up by inert gas purge machine 11 and inertia source of the gas, and the rare gas element of input can be selected argon gas, and its purity is at least 99.999%.
During implementation, the maximum operating temperature of described industrial furnace is 1100 ℃, and vacuum pump 13 is selected the 2X-70 sliding vane rotary vacuum pump, and power is 1.5kW, and the processing power of inert gas purge machine is 4m
3/ h, the purity of rare gas element is 99.999% after processing.
Claims (8)
1. high purity aluminizing furnace, comprise the industrial electro body of heater, it is characterized in that, be provided with the stainless steel flue in the furnace chamber of industrial electro body of heater, rare gas element input tube and thermopair enter the stainless steel flue by the flue mouth, and the edge that flies of flue mouth places on the electric furnace mouth, be fixedly connected with the industrial electro body of heater with pressing plate by screw rod, the flue mouth is provided with the heatproof sealing plug of coupling, and vacuum-pumping tube passes through heatproof sealing plug and flue internal communication, is furnished with magnetic valve on vacuum-pumping tube and the rare gas element input tube; Be positioned on the vacuum-pumping tube of heatproof sealing plug exposed parts and be furnished with radiating pipe, can be born-pressure that 0.1Mpa ~ 0.25Mpa changes by the stainless steel flue of heatproof sealing plug sealing.
2. high purity aluminizing furnace according to claim 1 is characterized in that, rare gas element input tube and thermopair are got over the heatproof sealing plug and entered the stainless steel flue.
3. high purity aluminizing furnace according to claim 1 is characterized in that, the magnetic valve on the vacuum-pumping tube and vacuum pump power supply synchronization, and this magnetic valve dead electricity is closed.
4. high purity aluminizing furnace according to claim 1 is characterized in that, after described rare gas element input tube entered the stainless steel flue, the air outlet was positioned at the stainless steel flue below 1/2nd.
5. high purity aluminizing furnace according to claim 1 is characterized in that, after described thermopair entered the stainless steel flue, its end was positioned at the stainless steel flue below 1/2nd.
6. one of according to claim 1-5 described high purity aluminizing furnace is characterized in that, described furnace chamber bottom is provided with saddle, and stainless steel flue base part seat is on described saddle; Described heatproof sealing plug is made by refractory brick, and after the heatproof sealing plug was filled in the flue mouth, heatproof sealing plug and flue flew to be provided with high-temperature seal ring between the edge; Described radiating pipe is the water-cooling pipe, and described rare gas element input tube is linked up by inert gas purge machine and inertia source of the gas, and the purity inert gas of input is at least 99.999%.
7. high purity aluminizing furnace according to claim 6 is characterized in that, described flue adopts austenitic chromium nickel stainless steel to make, and its internal diameter is 700-900mm, and significant depth is 900-1100mm in the chamber, and the thickness of heatproof sealing plug is 300-400mm.
8. high purity aluminizing furnace according to claim 7 is characterized in that austenitic chromium nickel stainless steel is selected: the 310S stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310278804.3A CN103352199B (en) | 2013-07-04 | 2013-07-04 | High purity aluminizing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310278804.3A CN103352199B (en) | 2013-07-04 | 2013-07-04 | High purity aluminizing furnace |
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| Publication Number | Publication Date |
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| CN103352199A true CN103352199A (en) | 2013-10-16 |
| CN103352199B CN103352199B (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310278804.3A Expired - Fee Related CN103352199B (en) | 2013-07-04 | 2013-07-04 | High purity aluminizing furnace |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3867184A (en) * | 1973-01-31 | 1975-02-18 | Alloy Surfaces Co Inc | Coating |
| CN1199102A (en) * | 1998-04-21 | 1998-11-18 | 冶金工业部钢铁研究总院 | Method for preparation of composite ceramic-Ni-Al intermetallic material |
| US20040038069A1 (en) * | 1994-02-16 | 2004-02-26 | Howmet Research Corporation | CVD codeposition of Al and one or more reactive (gettering) elements to form protective aluminide coating |
| CN201296777Y (en) * | 2008-11-26 | 2009-08-26 | 王新田 | Aluminized furnace |
| CN102899465A (en) * | 2012-09-10 | 2013-01-30 | 南京晨光集团有限责任公司 | Vacuum pulse hydrogen annealing apparatus and method for electric pure iron |
| CN203393215U (en) * | 2013-07-04 | 2014-01-15 | 南京摄炉(集团)有限公司 | High-purity aluminizing furnace |
-
2013
- 2013-07-04 CN CN201310278804.3A patent/CN103352199B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3867184A (en) * | 1973-01-31 | 1975-02-18 | Alloy Surfaces Co Inc | Coating |
| US20040038069A1 (en) * | 1994-02-16 | 2004-02-26 | Howmet Research Corporation | CVD codeposition of Al and one or more reactive (gettering) elements to form protective aluminide coating |
| CN1199102A (en) * | 1998-04-21 | 1998-11-18 | 冶金工业部钢铁研究总院 | Method for preparation of composite ceramic-Ni-Al intermetallic material |
| CN201296777Y (en) * | 2008-11-26 | 2009-08-26 | 王新田 | Aluminized furnace |
| CN102899465A (en) * | 2012-09-10 | 2013-01-30 | 南京晨光集团有限责任公司 | Vacuum pulse hydrogen annealing apparatus and method for electric pure iron |
| CN203393215U (en) * | 2013-07-04 | 2014-01-15 | 南京摄炉(集团)有限公司 | High-purity aluminizing furnace |
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| CN103352199B (en) | 2015-06-03 |
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Granted publication date: 20150603 Termination date: 20190704 |