CN201325984Y - Decarburization heat treating furnace for reducing carbon content of surface layer of workpiece - Google Patents
Decarburization heat treating furnace for reducing carbon content of surface layer of workpiece Download PDFInfo
- Publication number
- CN201325984Y CN201325984Y CNU2008202385422U CN200820238542U CN201325984Y CN 201325984 Y CN201325984 Y CN 201325984Y CN U2008202385422 U CNU2008202385422 U CN U2008202385422U CN 200820238542 U CN200820238542 U CN 200820238542U CN 201325984 Y CN201325984 Y CN 201325984Y
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- China
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- furnace
- carbon content
- retort
- decarburization
- bell
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Abstract
The utility model discloses a decarburization heat treating furnace used for reducing the carbon content of the surface layer of a workpiece. The decarburization heat treating furnace comprises a furnace body and a control device, and is characterized in that a furnace lining is arranged in the furnace body; a furnace chamber is arranged in the furnace lining; a heater used for producing heat is arranged in the furnace chamber; a furnace pot made of refractory steel is arranged in the furnace chamber; a charging basket made of refractory steel is arranged in the furnace pot; a furnace cover is arranged on the furnace pot; the furnace cover can seal the opening of the furnace chamber; a protective gas transmission pipeline supplies protective gases to the furnace pot and the charging basket; and the protective gases comprise gases preventing components from being oxidized and gases reacting with carbon on the surface layer of the components. The decarburization heat treating furnace can decarburize carbon-steel components with the protective gases, thereby decreasing the carbon content of the surface layer of the carbon-steel components, reducing the surface rigidity, and leading the workpiece to have good machining performance and better ductility and toughness, moreover, the use is convenient, and the operation is easy.
Description
Technical field
The utility model relates to a kind of high-temperature heat treatment stove that workpiece is heat-treated, and especially reduces the decarburization heat processing furnace of carbon content on work piece surface.
Background technology
When workpiece was heat-treated, because temperature higher (thermal treatment temp of steel part reaches 700～900 ℃ usually, and the Al-alloy parts temperature is low slightly), the oxidized and decarburization of workpiece surface of all will taking measures usually to prevent was in case reduce the physicochemical property of workpiece.But, in some special application field, such as military field, precision instrument manufacturing field etc., performance to steel part proposes special requirement, require its surface working excellent property, good toughness etc., just need carry out carbonization treatment, reduce its surface hardness steel part (mainly being soft steel), make workpiece surface have good processing properties, good ductility and toughness etc., to meet processing requirement.In the prior art, more be how to prevent workpiece oxidized and decarburization in surface in heat treatment process, and seldom relevant for the report that workpiece surface is carried out carbonization treatment, about the heat treatment furnace that workpiece surface is carried out carbonization treatment is not seen.
Summary of the invention
The utility model provides a kind of decarburization heat processing furnace that can prevent the workpiece surface non-oxidation in heat treatment process, can reduce carbon content on work piece surface at the deficiency of workpiece surface not being carried out the decarburization heat processing furnace of carbonization treatment in the prior art basically.
The technical solution of the utility model: reduce the decarburization heat processing furnace of carbon content on work piece surface, comprise body of heater and control device; It is characterized in that: furnace lining is arranged in the body of heater, is burner hearth in the furnace lining; Be provided with well heater in burner hearth, well heater produces heat under control device control; The retort that high temperature steel is made is set in burner hearth, is provided with the charging basket that high temperature steel is made in the retort; Retort is provided with bell, the opening of bell energy closed furnace; The shielding gas transport pipe feeds shielding gas in retort, charging basket, shielding gas comprises and prevents oxidized gas of part and the gas that can react with the carbon on part top layer.
Be further characterized in that: be provided with ventilator on the bell or in burner hearth.
Described shielding gas is N
2, H2 and CO
2Three kinds, feed in the retort respectively.
The decarburization heat processing furnace of reduction carbon content on work piece surface of the present utility model has following characteristics:
1, can under protective atmosphere, carry out carbonization treatment to carbon steel part, reduce the carbon content on carbon steel part top layer, reduce its surface hardness, make workpiece have good processing properties, good ductility and toughness.
2, easy to use, processing ease.
Description of drawings
Fig. 1 is the utility model heat treatment furnace structural representation;
Fig. 2 is that the A-A of Fig. 1 is to semisectional view;
Fig. 3 is well heater (part a 5) structure iron;
Fig. 4 is charging frame (part a 7) structure iron.
Among the figure, 1-body of heater, 2-control device, 3-furnace lining, 4-burner hearth, 5-well heater, 6-retort, the 7-frame of feeding, 8-frame pad, 9-bell, 10-ventilator, 11-bell running gear, 12-shielding gas transport pipe, 14-melt pit, 15-ventilating pit;
Embodiment
Below in conjunction with accompanying drawing the utility model is further described:
In Fig. 2,2,3, the decarburization heat processing furnace of reduction carbon content on work piece surface of the present utility model, comprise body of heater 1 and control device 2, the shell of body of heater 1 is welded with shaped steel and steel plate, be common garden cylindricality, rectangle etc., adopt energy-conservation ultralight refractory brick, refractory fibre and lagging material to build into furnace lining 3 by laying bricks or stones in the shell, furnace lining 3 is energy-conservation compound Lining, be the burner hearth 4 of hollow in the furnace lining 3, burner hearth 4 is circular (also can be made as ellipse, rectangle etc.) as required normally.Well heater 5 is set in body of heater 1, well heater 5 is set in burner hearth 4 shown in the figure, well heater 5 produces heat under control device 2 control, and heating furnace 4 is elevated to the temperature of burner hearth 4 and pending part the temperature of processing requirement; Well heater 5 can be used type of heating such as electrically heated, inflammable gas heating, coal heating, well heater 5 in the accompanying drawing is resistance wires, the energising back produces heat, specifically adopts high-resistance electrothermic alloy silk (0Cr21Al6Nb) to turn to spirrillum and is placed in burner hearth (see figure 3) on every side.Control device 2 adopts prior art, is not described further at this.
Retort 6 is set in burner hearth 4, and the material of retort 6 is high temperature steel (Cr25Ni20Si2 materials), can protect suitable strength and stiffness under the temperature of processing requirement.Be provided with the charging basket 7 that high temperature steel is made in the retort 6, specifically make fashionable dress charging basket 7 and retort 6 same materials, pending part is placed on the retort of packing in the charging basket 7 and heat-treats after artificial the cleaning.For the firm needs of installing, can below charging basket 7, a frame pad 8 be set, the handling of convenient charging basket 7 and firm as required can be with the overlapping placement about in the of 7 of a plurality of charging basket.Retort 6 is provided with bell 9, and is pressed on the retort 6 by the handwheel hold-down gear.Bell 9 simultaneously also can closed furnace 4 opening, the heat that prevents burner hearth 4 by opening be dispersed into stove outer, prevent that the outer gas of stove from entering in the burner hearth 4.For processed workpiece is heated equably, bell 9 is provided with ventilator 10, or in burner hearth 4 ventilator 10 is set, and starts ventilator 10 and is used for stirring gas in the retort, makes its pump circulation reach the uniform purpose of temperature, guarantees heat treated temperature homogeneity.Because bell 9 temperature height, and it is very inconvenient manually to remove commentaries on classics, a cover bell running gear 11 can be set be connected with bell 9, covers 9 to move, to remove converter; Concrete bell running gear 11 is formed the lifting of control bell 9 by worm-and-wheel gear; And can on the lifting shaft of bell running gear 11, limit switch be housed, with the stroke of control hoisting appliance, prevent that screw mandrel from deviating from worm type of reduction gearing and meeting accident.Ventilator 10, bell running gear 11 are connected with control device 2, and the control that it such as starts, closes at controlled device 2 is not described further at this.
At high temperature oxidized in order to prevent pending part, and the purpose that reaches decarburization, a cover shielding gas transport pipe 12 is set passes burner hearth 4 and enter in the retort 6, feeding shielding gas in retort 6, charging basket 7, be enclosed in pending part around.Shielding gas comprise at least prevent the oxidized gas of part and can with the gas of the carbon on part top layer reaction, as N
2And CO
2Two kinds, or N
2, H
2, CO
2Three kinds etc., feed respectively in the retort 6 according to processing requirement; As feed aforementioned three kinds of gases, and three pipelines need be set usually, carry aforementioned three kinds of different shielding gas respectively.N
2(or other rare gas element) mainly plays the effect of protection, the air in burner hearth 4 and the retort 6 driven dare away, prevents that airborne oxygen from contacting with the pyritous part and oxidized, CO
2Can play decarburizating, at high temperature the carbon atom with piece surface reacts, and the carbon atom of piece surface is broken away from from piece surface, plays decarburizating.H
2Mainly be to prevent that workpiece surface is not oxidized in carbon rejection process, the break-make control of shielding gas transport pipe 12, the time point that should feed respectively and quantity etc. can be with reference to prior aries, and processing parameter decision and control by concrete are not described further at this.
For the ease of the layout of production plant, one or more melt pits 14 can be set at the correct position of production plant, body of heater 1 is arranged in this melt pit 14, with in retort 6 bodies of heater 1 of packing into such as (together with charging frame 7, part and bells 9), heat-treat again.
The charging frame 7 of Fig. 4 is made by high temperature steel, and its side is provided with more than one a plurality of ventilating pit 15, and ventilating pit 15 dense being arranged on charging frame 7 sides among the figure guarantee N
2, H
2, CO
2Three kinds of shielding gas can be fully enclosed in pending part around, play decarburization, anti-oxidation effect.
Above-mentioned heat treatment furnace, can realize decarburization, anti-oxidation effect, as the complete Equipment for Heating Processing of a cover, usually the cooling station should be set, will reach retort 6 (together with charging frame 7, part and bell 9) after heating, the heat preservation method requirement and move to and cool off station and cool off.In process of cooling, bell 9 enclosing cover always will feed anti-oxidation shielding gas equally in retort 6 on retort 6, will feed N at least
2And H
2Two kinds, prevent that workpiece is oxidized.In order to accelerate the effect that cools, can the exhausting refrigerating unit be set at the cooling station and be connected with retort 6, the hot gas in the retort 6 is extracted out.As required, prepare 6, one of two or more retorts and be in heating, holding stage, another is in cooling stages, is used alternatingly mutually, can effectively improve the processing power of the utility model Equipment for Heating Processing.In order to prevent the infringement of high temperature to associated components, can be in body of heater 1 or its corresponding cooling water pipeline system is set on surperficial, associated components is cooled.Above-mentioned exhausting refrigerating unit, cooling water pipeline system etc. can adopt prior art, are not further described at this.
Claims (7)
1, reduces the decarburization heat processing furnace of carbon content on work piece surface, comprise body of heater (1) and control device (2); It is characterized in that: furnace lining (3) is arranged in the body of heater 1, is burner hearth (4) in the furnace lining (3); Be provided with well heater (5) in body of heater (1), well heater (5) produces heat under control device (2) control; The retort (6) that high temperature steel is made is set in burner hearth (4), is provided with the charging basket (7) that high temperature steel is made in the retort (6); Retort (6) is provided with bell (9), the opening of bell (9) energy closed furnace (4); Shielding gas transport pipe (12) feeds shielding gas in retort (6), charging basket (7), shielding gas comprises and prevents oxidized gas of part and the gas that can react with the carbon on part top layer.
2, the decarburization heat processing furnace of reduction carbon content on work piece surface according to claim 1 is characterized in that: go up or be provided with ventilator (10) at bell (9) in burner hearth (4).
3, the decarburization heat processing furnace of reduction carbon content on work piece surface according to claim 1 and 2 is characterized in that: described shielding gas is N
2And CO
2Two kinds, feed respectively in the retort (6).
4, the decarburization heat processing furnace of reduction carbon content on work piece surface according to claim 1 and 2 is characterized in that: described shielding gas is N
2, H
2, CO
2Three kinds, feed respectively in the retort (6).
5, the decarburization heat processing furnace of reduction carbon content on work piece surface according to claim 3 is characterized in that: the side of charging frame 7 is provided with more than one ventilating pit (15).
6, the decarburization heat processing furnace of reduction carbon content on work piece surface according to claim 4 is characterized in that: the side of charging frame 7 is provided with more than one ventilating pit (15).
7, the decarburization heat processing furnace of reduction carbon content on work piece surface according to claim 1 and 2 is characterized in that: bell running gear (11) is set is connected with bell (9), with bung (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202385422U CN201325984Y (en) | 2008-12-30 | 2008-12-30 | Decarburization heat treating furnace for reducing carbon content of surface layer of workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202385422U CN201325984Y (en) | 2008-12-30 | 2008-12-30 | Decarburization heat treating furnace for reducing carbon content of surface layer of workpiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201325984Y true CN201325984Y (en) | 2009-10-14 |
Family
ID=41177960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202385422U Expired - Fee Related CN201325984Y (en) | 2008-12-30 | 2008-12-30 | Decarburization heat treating furnace for reducing carbon content of surface layer of workpiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201325984Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102490996A (en) * | 2011-12-15 | 2012-06-13 | 浙江跃进机械有限公司 | Insulation case |
| CN102492817A (en) * | 2011-12-15 | 2012-06-13 | 浙江跃进机械有限公司 | Aging treatment method for saving energy |
| CN102586553A (en) * | 2012-03-15 | 2012-07-18 | 重庆飞达电炉有限公司 | High precision titanium alloy resistance heating furnace |
-
2008
- 2008-12-30 CN CNU2008202385422U patent/CN201325984Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102490996A (en) * | 2011-12-15 | 2012-06-13 | 浙江跃进机械有限公司 | Insulation case |
| CN102492817A (en) * | 2011-12-15 | 2012-06-13 | 浙江跃进机械有限公司 | Aging treatment method for saving energy |
| CN102586553A (en) * | 2012-03-15 | 2012-07-18 | 重庆飞达电炉有限公司 | High precision titanium alloy resistance heating furnace |
| CN102586553B (en) * | 2012-03-15 | 2014-07-16 | 重庆飞达电炉有限公司 | High precision titanium alloy resistance heating furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091014 Termination date: 20121230 |