CN110157882A - A kind of stainless steel aging of middle temperature heat treatment method and its vacuum drying oven - Google Patents
A kind of stainless steel aging of middle temperature heat treatment method and its vacuum drying oven Download PDFInfo
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- CN110157882A CN110157882A CN201910504955.3A CN201910504955A CN110157882A CN 110157882 A CN110157882 A CN 110157882A CN 201910504955 A CN201910504955 A CN 201910504955A CN 110157882 A CN110157882 A CN 110157882A
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- vacuum
- heat
- inert gas
- stainless steel
- heat treatment
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a kind of stainless steel aging of middle temperature heat treatment method and its vacuum drying ovens, it is related to stainless steel hot processing technology field, by being transformed to original vacuum furnace apparatus, change the communicating position of inert gas source and vacuum equipment and vacuum tank, i.e. in such a way that change inert gas flows direction and swabbing action direction match, achieve the purpose that obstructing vapor enters to heat treatment box house, and then achievees the purpose that solve the problems, such as that oxidation stain occurs for the heat treatment of stainless steel product aging of middle temperature.
Description
Technical field
The present invention relates to stainless steel hot processing technology fields, more particularly, to a kind of stainless steel aging of middle temperature heat treatment method
And its vacuum drying oven.
Background technique
The product (MIM refers to metal injection molded processing technology) of MIM17-4PH stainless steel material is by aging of middle temperature warm
It manages (580-620 DEG C of ageing treatment), the plasticity and toughness of material can be enhanced, improve the comprehensive mechanical property of material.But existing
Under some vacuum furnace apparatus and operational mode, product can lead to the problem of oxidation stain after aging of middle temperature is heat-treated；Product
Oxidation stain it is very big to its appearance effects, and the corrosion resistance of product can be damaged.
Oxidation stain main the reason of there are three aspects, occurs for the processing of MIM17-4PH stainless steel aging of middle temperature, and first is
17-4PH stainless steel material can be easier at this time when being heated to the aging of middle temperature stage in the range of its " sensitized reaction "
Oxidation stain phenomenon occurs；Second be vacuum drying oven insulation layer material be loose porous material, be easy adsorption moisture,
Moisture can evaporate in the aging strengthening model stage becomes vapor, and vapor is contacted with product occurs oxidation reaction, so that product becomes
Color；Third is in the aging of middle temperature stage, and vacuum atmosphere is weaker to the reducing power of oxide layer on surface of material, is not enough to be gone back
It is former.
In three factors of above-mentioned influence product discoloration, and the characteristic and object of material itself are thirdly belonged at first point
Manage attribute, it is difficult to improved by process means, and second point belongs to apparatus factor, can be changed by process means
It is kind, it is therefore desirable to aging of middle temperature heat treatment process and its vacuum drying oven used be improved, MIM17-4PH stainless steel is solved
The problem of oxidation stain, occurs for matter product.
Summary of the invention
In view of the above technical problems, one of the objects of the present invention is to provide a kind of stainless steel aging of middle temperature to be heat-treated vacuum
Furnace, vacuum equipment and inert gas source are connected with heat preservation cylinder and heat treatment cabinet respectively, then it is intracorporal to be adsorbed on heat-preservation cylinder
Vapor is expelled directly out vacuum tank under the suction of vacuum equipment and the mobilization of inert gas, without entering heat
It in treatment box body, avoids contacting with product surface and oxidation reaction occurring, and then reaches and solve the production of MIM17-4PH stainless steel material
The purpose of product generation oxidation stain problem.
To achieve the above object, the present invention provides the following technical scheme that a kind of stainless steel aging of middle temperature is heat-treated vacuum
Furnace includes vacuum tank, heat preservation cylinder is provided in the vacuum tank, and be provided with heat treatment box in the heat-preservation cylinder body
The chamber of body, the heat treatment cabinet is connected with the chamber of heat preservation cylinder, and product is placed in the heat treatment box body；It is described
The chamber of heat preservation cylinder has vacuum equipment, and the chamber of the heat treatment cabinet is communicated with inert gas source.
By using above-mentioned technical proposal, product is placed in heat treatment box body, and inert gas source heat treated cabinet
Interior injection inert protective gas, while vacuum equipment extracts the intracorporal gas of heat-preservation cylinder out outward；Made by the suction of vacuum equipment
The vapor for keeping the temperature cylinder release is exported vacuum tank, that is, blocked by the mode matched with the mobilization with inert gas
Movement, avoids vapor from contacting with product surface and oxidation reaction occurs, to reach solution in vapor heat treated cabinet
The purpose of MIM17-4PH stainless steel material product generation oxidation stain problem.
The present invention is further arranged to: the chamber of the heat preservation cylinder and vacuum equipment is direct-connected the first pipeline, and described the
One pipeline wears vacuum tank and is connected with the chamber of heat preservation cylinder；And the chamber and inert gas source of the heat treatment cabinet
Direct-connected to have the second pipeline, second pipeline wears vacuum tank and keeps the temperature cylinder and be connected with the chamber of heat treatment cabinet.
By using above-mentioned technical proposal, the lazy of vacuum tank is realized in such a way that the first pipeline and the second pipeline are direct-connected
Property gas flow path, and pipeline connection structure is simple, and the inert gas shielding of vacuum drying oven is realized while protecting product
Mode.
The present invention is further arranged to: being provided with pipe valve on second pipeline.
By using above-mentioned technical proposal, valve of blinding off a line, and vacuum equipment is opened, to realize that the vacuum of vacuum drying oven is protected
Shield mode, and the handover operation of both of which (inert gas shielding mode and vacuum protection mode) is simple, equipment change is small, just
In implementation.
The present invention is further arranged to: one end that the heat treatment cabinet is connected with the second pipeline is set as inlet end,
The heat treatment cabinet end opposite with inlet end is set as outlet side, and opens up and be formed with and heat-preservation cylinder at the outlet side
The communication port that the chamber of body is connected.
By using above-mentioned technical proposal, it is heat-treated the inlet end and the connection of itself that cabinet is connected with the second pipeline
Mouth so that inert gas is sufficient filling with the inner space of heat treatment cabinet, while avoiding inert gas flow pair in being oppositely arranged
Product causes lateral impact.
The present invention is further arranged to: vacuum plant, and the vacuum plant and inertia are communicated on second pipeline
Gas source selection the second pipeline of connection.
By using above-mentioned technical proposal, after completing the aging of middle temperature heat treatment operation of product, vacuum equipment is closed, then
The inert gas in vacuum tank can be recycled in vacuum plant.
The present invention is further arranged to: vacuum drying oven is set as vacuum batch furnace.
By using above-mentioned technical proposal, the aging of middle temperature heat treatment operation of product is carried out using vacuum batch furnace, it can be with
The heat treatment efficiency of product is improved, while improving the product yield in the unit time.
The present invention is further arranged to: the vacuum tank is set as cylinder type horizontal type structure.
By using above-mentioned technical proposal, the aging of middle temperature heat of product is completed using the vacuum tank of cylinder type horizontal type structure
Operation is handled, had both been convenient for the replacement operation of product, while being easily installed fixed vacuum drying oven.
The present invention is further arranged to: the heat preservation cylinder is set as the cylinder type made of carbon felt material.
By using above-mentioned technical proposal, heat preservation cylinder is made using carbon felt material, carbon felt material have it is preferable it is heat-resisting,
Acidproof and alkaline-resisting feature is conducive to improve the stability that vacuum drying oven carries out aging of middle temperature heat treatment operation.
In view of the above technical problems, the second object of the present invention is to provide a kind of stainless steel aging of middle temperature heat treatment side
Method, in such a way that change inert gas flows direction and pull of vacuum action direction match, barrier heat preservation cylinder release
Vapor enters in heat treatment box body, and then reaches and solve the problems, such as that oxidation stain occurs for MIM17-4PH stainless steel material product
Purpose.
To achieve the above object, the present invention provides the following technical scheme that selection inert gas shielding mode, inert gas
Inert gas is injected in the heat treated cabinet of source, and vacuum equipment opens extraction heat preservation cylinder and the intracorporal sky of heat treatment box outward
Gas, inert gas and vapor；Vacuum protection mode is selected, injects inert gas in cutting inert gas source heat treated cabinet
Access, and vacuum equipment opens extraction heat preservation cylinder and the intracorporal air of heat treatment box and vapor outward.
By using above-mentioned technical proposal, user can select inertia according to the actual conditions of vacuum drying oven and processing technology
Gas shield mode or vacuum protection mode；When selecting inert gas shielding mode, inert gas is injected into heat treatment box
In vivo, and vacuum tank is discharged in the intracorporal vapor of heat-preservation cylinder and inert gas gaseous mixture under the swabbing action of vacuum equipment,
When selecting vacuum protection mode, cutting inert gas injects the intracorporal access of heat treatment box, and the intracorporal vapor of heat-preservation cylinder
Vacuum tank is discharged under the swabbing action of vacuum equipment with inert gas gaseous mixture.Inert gas flows direction and pull of vacuum
Action direction matches, and the vapor of barrier heat preservation cylinder release enters in heat treatment box body, and then reaches and solve MIM17-4PH
The purpose of stainless steel material product generation oxidation stain problem.
In conclusion the invention has the following advantages:
First, changing the communicating position of inert gas source, vacuum equipment and vacuum tank, that is, change the flow direction of inert gas
And the action direction of vacuum suction, to reach barrier, by the vapor that heat preservation cylinder discharges to enter to heat treatment box intracorporal
Purpose, and then achieve the purpose that solve the problems, such as stainless steel product aging of middle temperature oxidation stain；
Second, without increasing the step of removing oxide layer is removed in pickling after aging of middle temperature heat treatment, can to avoid subsequent pickling zone,
The use for avoiding chemical pickling liquid, reduces the consumption of resource and the energy, and social benefit improves significant；
Third, user is without doing special adjustment, it is only necessary to be finely adjusted on the basis of original vacuum drying oven, greatly save
About social resources；
Fourth, either inert gas shielding mode or vacuum protection mode, the aging of middle temperature that may be applicable to this product are warm
Processing method and the vacuum drying oven for using this method have preferable practicability and suitability.
Detailed description of the invention
Fig. 1 is the schematic diagram of gas flow direction in vacuum drying oven and vacuum drying oven when selecting inert gas shielding mode；
Fig. 2 is the schematic diagram of gas flow direction in vacuum drying oven and vacuum drying oven when selecting vacuum protection mode；
Fig. 3 is the flow diagram of stainless steel aging of middle temperature heat treatment method.
Appended drawing reference: 1, vacuum tank；2, cylinder is kept the temperature；3, it is heat-treated cabinet；31, inlet end；32, outlet side；33, even
Port；4, vacuum equipment；5, inert gas source；6, the first pipeline；7, the second pipeline；71, pipe valve；8, vacuum plant.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Embodiment one:
Referring to figs. 1 and 2, a kind of stainless steel aging of middle temperature thermal treatment vacuum furnace, it is preferential to select vacuum batch furnace as true
Empty furnace uses, and vacuum batch furnace includes the vacuum tank 1 for being set as horizontal cylinder type structure, be equipped in vacuum tank 1 by
Cylinder 2 is kept the temperature made of carbon felt material, heat preservation cylinder 2 is similarly cylinder type, and keeps the temperature in cylinder 2 and be provided with heat treatment box
Body 3, the chamber for being heat-treated cabinet 3 are connected with the chamber of heat preservation cylinder 2.MIM17-4PH stainless steel material product is placed in heat
It handles on the partition in cabinet 3, heating heating operation is completed by the heating device of vacuum tank 1 itself, and to vacuum tank 1
It is inside passed through the air that inert gas is built in atmosphere of inert gases either pump vacuum vessel 1 and builds vacuum environment atmosphere, come
Complete the aging of middle temperature heat treatment operation of product.
Vacuum tank 1 has been respectively communicated with vacuum equipment 4 and inert gas source 5, and vacuum equipment 4 is for aspirating heat preservation cylinder 2
Interior vapor, air or inert gas, and inert gas source 5 is used to provide inertia for heat treatment cabinet 3 and heat preservation cylinder 2
Gas supply.Vacuum equipment 4 is located at the side of vacuum tank 1, and the cavity of vacuum equipment 4 and heat preservation cylinder 2 is communicated with first
Pipeline 6, i.e. the first pipeline 6 wear vacuum tank 1 and are connected with the chamber of heat preservation cylinder 2；Inert gas source 5 is located at vacuum appearance
The other side of device 1, and the chamber of inert gas source 5 and heat treatment cabinet 3 is communicated with the second pipeline 7, i.e. the second pipeline 7 is worn very
Empty container 1 and heat preservation cylinder 2 are simultaneously connected with the chamber of heat treatment cabinet 3.
Second pipeline 7 wears upwards via the bottom of vacuum tank 1 and is connected to the bottom inflow end 31 of heat treatment cabinet 3
Place, and it is heat-treated the communication port 33 for opening up at the top outlet side 32 of cabinet 3 and being formed with and being connected with the chamber of heat preservation cylinder 2,
That is the gas outlet of communication port 33 and the second pipeline 7 is in be oppositely arranged.
Both it had been communicated with above-mentioned inert gas source 5 on second pipeline 7, has also been communicated with vacuum plant 8(either vacuum plant 8
Or vacuum equipment 4, may be configured as vacuum pump), after completing aging of middle temperature processing, vacuum plant 8 can be opened and aspirate vacuum
Inert gas in container 1.Pipe valve 71(is additionally provided on second pipeline 7 can be used electrical valve as the pipe valve
71), when needing to carry out the aging of middle temperature heat treatment operation of vacuum protection mode, valve 71 of blinding off a line may be selected；Work as needs
When carrying out the aging of middle temperature heat treatment operation of inert gas shielding mode, it may be selected to open pipe valve 71.
Embodiment two:
As shown in figure 3, a kind of stainless steel aging of middle temperature heat treatment method, selection determines progress indifferent gas according to the actual situation first
The aging of middle temperature of body protected mode is heat-treated, or selection carries out the aging of middle temperature heat treatment of vacuum protection mode.It is lazy when selecting
Property gas shield mode, inject inert gas in 5 heat treated cabinet 3 of inert gas source, and vacuum equipment 4 opens outside extraction
Air, inert gas and the vapor for keeping the temperature cylinder 2 and being heat-treated in cabinet 3；When selection vacuum protection mode, valve of blinding off a line
Door 71 injects the access of inert gas to cut off in 5 heat treated cabinet 3 of inert gas source, and vacuum equipment 4 opens outside pumping
Heat preservation cylinder 2 and the air and vapor that are heat-treated in cabinet 3 out.
The present embodiment is further elaborated below with reference to specific mode:
When selecting inert gas shielding mode to carry out aging strengthening model, protective inert gas is provided by inert gas source 5,
Vacuum equipment 4 carries out vacuuming action, and under the suction of vacuum equipment 4, gas is flowed towards the direction of the first pipeline 6.
At this time due to the flowing of the suction and inert gas of vacuum equipment 4, be adsorbed on vapor in heat preservation cylinder 2 can not again into
Enter to be heat-treated in cabinet 3, also can not just be contacted with product surface and oxidation reaction occurs；
When selecting vacuum protection mode to carry out aging strengthening model, pipeline valve is closed, and vacuum equipment 4 carries out vacuuming action,
Under the suction of vacuum equipment 4, gas is flowed towards the direction of the first pipeline 6.At this time since the suction of vacuum equipment 4 is made
With the vapor being adsorbed in heat preservation cylinder 2 can not enter back into heat treatment cabinet 3, also can not just contact simultaneously with product surface
Oxidation reaction occurs.
Present embodiment is only explanation of the invention, is not limitation of the present invention, art technology
Personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as
All by the protection of Patent Law in scope of the presently claimed invention.
Claims (9)
1. a kind of stainless steel aging of middle temperature thermal treatment vacuum furnace, it is characterised in that: include vacuum tank (1), the vacuum is held
It is provided with heat preservation cylinder (2) in device (1), and is provided with heat treatment cabinet (3), the heat treatment box in the heat preservation cylinder (2)
The chamber of body (3) is connected with the chamber of heat preservation cylinder (2), and product is placed in the heat treatment cabinet (3)；The heat-preservation cylinder
The chamber of body (2) has vacuum equipment (4), and the chamber of heat treatment cabinet (3) is communicated with inert gas source (5).
2. a kind of stainless steel aging of middle temperature thermal treatment vacuum furnace according to claim 1, it is characterised in that: the heat-preservation cylinder
The chamber of body (2) with vacuum equipment (4) are direct-connected has the first pipeline (6), first pipeline (6) wear vacuum tank (1) and with
The chamber of heat preservation cylinder (2) is connected；And the chamber of heat treatment cabinet (3) with inert gas source (5) are direct-connected the second pipe
Road (7), second pipeline (7) wear vacuum tank (1) and keep the temperature cylinder (2) and be connected with the chamber of heat treatment cabinet (3)
It is logical.
3. a kind of stainless steel aging of middle temperature thermal treatment vacuum furnace according to claim 2, it is characterised in that: second pipe
Pipe valve (71) are provided on road (7).
4. a kind of stainless steel aging of middle temperature thermal treatment vacuum furnace according to claim 2, it is characterised in that: the heat treatment
One end that cabinet (3) is connected with the second pipeline (7) is set as inlet end (31), the heat treatment cabinet (3) and inlet end
(31) opposite end is set as outlet side (32), and the chamber being formed with heat preservation cylinder (2) is opened up at the outlet side (32)
The communication port (33) that room is connected.
5. a kind of stainless steel aging of middle temperature thermal treatment vacuum furnace according to claim 2, it is characterised in that: second pipe
It is communicated on road (7) vacuum plant (8), and the vacuum plant (8) is connected to the second pipeline (7) with inert gas source (5) selection.
6. a kind of stainless steel aging of middle temperature thermal treatment vacuum furnace according to claim 1, it is characterised in that: vacuum drying oven setting
For vacuum batch furnace.
7. a kind of stainless steel aging of middle temperature thermal treatment vacuum furnace according to claim 6, it is characterised in that: the vacuum is held
Device (1) is set as cylinder type horizontal type structure.
8. a kind of stainless steel aging of middle temperature thermal treatment vacuum furnace according to claim 1, it is characterised in that: the heat-preservation cylinder
Body (2) is set as the cylinder type made of carbon felt material.
9. a kind of stainless steel aging of middle temperature heat treatment method using the vacuum drying oven as described in claim 1-8 any one, special
Sign is: selection inert gas shielding mode, injects inert gas, and vacuum in inert gas source (5) heat treated cabinet (3)
Equipment (4) opens extraction heat preservation cylinder (2) outward and the air, inert gas and the vapor that are heat-treated in cabinet (3)；
Vacuum protection mode is selected, the access of injection inert gas in cutting inert gas source (5) heat treated cabinet (3), and
Vacuum equipment (4) opens extraction heat preservation cylinder (2) outward and the air and vapor that are heat-treated in cabinet (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910504955.3A CN110157882A (en) | 2019-06-11 | 2019-06-11 | A kind of stainless steel aging of middle temperature heat treatment method and its vacuum drying oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910504955.3A CN110157882A (en) | 2019-06-11 | 2019-06-11 | A kind of stainless steel aging of middle temperature heat treatment method and its vacuum drying oven |
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| Publication Number | Publication Date |
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| CN110157882A true CN110157882A (en) | 2019-08-23 |
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ID=67628501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910504955.3A Pending CN110157882A (en) | 2019-06-11 | 2019-06-11 | A kind of stainless steel aging of middle temperature heat treatment method and its vacuum drying oven |
Country Status (1)
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| CN (1) | CN110157882A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103031417A (en) * | 2012-12-29 | 2013-04-10 | 江苏丰东热技术股份有限公司 | Furnace gas balancing replacement system and balancing replacement method for vacuum heat treatment furnace |
| CN104195503A (en) * | 2014-05-25 | 2014-12-10 | 北京华翔电炉技术有限责任公司 | A horizontal high-pressure gas quenching-tempering-nitridation vacuum multipurpose furnace |
-
2019
- 2019-06-11 CN CN201910504955.3A patent/CN110157882A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103031417A (en) * | 2012-12-29 | 2013-04-10 | 江苏丰东热技术股份有限公司 | Furnace gas balancing replacement system and balancing replacement method for vacuum heat treatment furnace |
| CN104195503A (en) * | 2014-05-25 | 2014-12-10 | 北京华翔电炉技术有限责任公司 | A horizontal high-pressure gas quenching-tempering-nitridation vacuum multipurpose furnace |
Non-Patent Citations (2)
| Title |
|---|
| JERALD BALINNANG 等: "高性能MIM真空烧结炉的主要特性和组件", 《粉末冶金技术》 * |
| 周晓铿 等: "高性能MIM材料烧结炉的特征及设备主要组成", 《电源技术》 * |
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Application publication date: 20190823 |
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