CN109252023A - A method of it is quenched based on fluidised form graphite particle stove heating parts locally - Google Patents
A method of it is quenched based on fluidised form graphite particle stove heating parts locally Download PDFInfo
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- CN109252023A CN109252023A CN201811264799.XA CN201811264799A CN109252023A CN 109252023 A CN109252023 A CN 109252023A CN 201811264799 A CN201811264799 A CN 201811264799A CN 109252023 A CN109252023 A CN 109252023A
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- China
- Prior art keywords
- quenching
- graphite particle
- fluidised form
- parts locally
- stove heating
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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
- C21D1/34—Methods of heating
- C21D1/53—Heating in fluidised beds
-
- 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
- C21D1/62—Quenching devices
-
- 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
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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- 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
- F27D19/00—Arrangements of controlling devices
-
- 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
- C21D2221/00—Treating localised areas of an article
-
- 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
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
- F27D2019/0078—Regulation of the speed of the gas through the charge
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The present invention relates to a kind of methods based on the quenching of fluidised form graphite particle stove heating parts locally, belong to technical field of mechanical processing.The present invention first protects non-quenching position according to the heating protecting device that parts locally quenches form Design workpiece；Its secondary design non-quenching position thermal insulation protection means；Then graphite particle furnace cloth wind flow is controlled；Finally design separation quenching means.Compare the prior art, the present invention realizes the production technology based on fluidised form graphite particle heating furnace heated components selective hardening, efficiently solve the limitation of salt bath furnace selective hardening, have the characteristics that high-quality, efficient, energy saving, pollution-free, inexpensive, is effective alternative of current salt bath furnace selective hardening.
Description
Technical field
The present invention relates to a kind of methods based on the quenching of fluidised form graphite particle stove heating parts locally, belong to machining skill
Art field.
Background technique
It is salt bath furnace that certain type product finished parts, which is heat-treated main heating means: divide medium temperature salt bath and high-temperature salt bath,
Main chemical compositions BaCl2.Due to the barium ions in salt bath be heavy metal element, salt bath quenching part remain in hardening media or
The discharge of the barium ions cleaned in the saline mixture of part has pollution to environment, to promote heat treatment technics development, improving
Environmental protection reduces occupational hazards, need to introduce new thermal treatment process technology.
Through investigating, salt bath furnace selective hardening (except medium-high frequency surface hardening) is that each heat treatment production unit can not take at present
A kind of processing method in generation reduces salt bath furnace for this purpose, being badly in need of carrying out the research of selective hardening using fluidised form graphite particle heating furnace
Frequency of usage realizes the production technology of " high-quality, efficient, energy saving, pollution-free, inexpensive ".
According to Modern Green manufacturing industry, environmentally friendly production requirement, a kind of use fluidised form graphite particle stove heating part need to be invented
The method for carrying out selective hardening, to solve the limitation of salt bath furnace selective hardening, and plays the role of energy-saving and environment-friendly.
The present invention proposes that a kind of use tooling fills aluminosilicate refractory fiber heat-insulation and heat-preservation method, by part non-quenching heating part
Position localised protection, controls the scheme of graphite particle furnace cloth wind flow.
Summary of the invention
The purpose of the present invention is how fluidised form graphite particle heating furnace to be utilized to carry out selective hardening for solution, salt bath furnace is reduced
The problem of frequency of usage, the production technology of realization " high-quality, efficient, energy saving, pollution-free, inexpensive ", proposes a kind of based on fluidised form
The method of graphite particle stove heating parts locally quenching, to overcome the above-mentioned deficiency of currently available technology.
The purpose of the present invention is what is be achieved through the following technical solutions:
A method of it is quenched based on fluidised form graphite particle stove heating parts locally, its step are as follows:
Step 1: non-quenching position is protected according to the heating protecting device that parts locally quenches form Design part
Shield；
Step 2: design non-quenching position thermal insulation protection means；
Step 3: control graphite particle furnace cloth wind flow；
Step 4: design separation quenching means.
The utility model has the advantages that
The prior art is compared, the present invention realizes the production based on fluidised form graphite particle heating furnace heated components selective hardening
Technology efficiently solves the limitation of salt bath furnace selective hardening, have the characteristics that it is high-quality, efficient, energy saving, pollution-free, inexpensive,
It is effective alternative of current salt bath furnace selective hardening.
Detailed description of the invention
Fig. 1 is cartridge extractor selective hardening structural schematic diagram.
Fig. 2 is the low wind low pressure local heating part schematic diagram of graphite particle furnace.
Fig. 3 is selective hardening protecting tool set-up pattern and schematic diagram in kind；(a) pattern schematic diagram, (b) schematic diagram in kind.
Fig. 4 is that parts locally quenching is loaded and quenching process schematic diagram；(a) material object is loaded schematic diagram, (b) quenching process
Schematic diagram.
Fig. 5 is the pattern and schematic diagram in kind that part protecting tool set-up bottom is not filled by asbestos；(a) pattern top view, (b) figure
Sample side view, (c) top view in kind, (d) side view in kind.
Fig. 6 is the pattern and schematic diagram in kind of a small amount of asbestos of part protecting tool set-up underfill；(a) pattern side view, (b)
Top view in kind.
Specific embodiment
It describes in detail with reference to the accompanying drawing with embodiment to the present invention.
Embodiment 1:
A method of it is quenched based on fluidised form graphite particle stove heating parts locally, with selective hardening pumping as shown in Figure 1
For bobbin, selective hardening position is the part I as shown in the figure, and it is as follows to introduce basic implementation process of the invention:
1. the 1st test
1) the low wind low pressure Local heating method of scheme-
When salt bath furnace is heated to steel austenitizing temperature, surface is very smooth, is to realize parts locally heating most
Effective method.During the test, when by graphite particle stove heating the characteristics of, is observed for project team, if discovery is by granular graphite
Sub- furnace air distribution plate pressure is transferred to minimum, supply voltage and is reduced, and graphite particle furnace surface is substantially at formation state.Therefore, it uses
Similar to the heating means of salt bath furnace, parts locally is protruded into graphite particle medium and air dielectric surface is heated.
2) test result
Through testing, since particle furnace heating time is long, heating position heat diffusion expands heat affected area, influences non-quench
The hardness at fiery position cannot achieve the purpose of local heating using this method, this kind of heating means are negated through test.Using this
Low wind low pressure local heating methods are as shown in Figure 2 to the state of heat parts.2. the 2nd test
1) scheme-tooling protection heating integral quenching pyrogenic process
According to the fire resisting and thermal insulation property of alumina silicate fibre, design elements fill the heated protective work of aluminosilicate refractory fiber
The position for not needing quenching is subject to thermal insulation protection by dress, and tooling pattern and material object are shown in Fig. 3, are loaded and quenching process is shown in Fig. 4.
2) test result
The cartridge extractor inspection result for being quenched front and back is shown in Table 1.
Table 1 is using cartridge extractor testing result after tooling heat preservation
3) conclusion:
Shown by 1 testing result of table: aluminosilicate refractory fiber heat-insulation and heat-preservation method localised protection granular graphite is filled using tooling
After sub- stove heating, selective hardening may be implemented, and meet product parts pattern technical requirements.
This test weaknesses analysis: since tested parts and tooling enter oil simultaneously, fiber immersion oil goes out band after oil groove after quenching
Oil smoke amount out is big, influences environmental pollution, proposes following new corrective measure for this disadvantage.
3. the 3rd test
1) scheme-tooling protection part individually enters oil quenching pyrogenic process
For overcome above-mentioned tooling there are the shortcomings that, Curve guide impeller tooling again.According to the shape feature of part, part end
There is a projecting hook, rapidly to separate part with tooling before quenching, designs a movable floor in tooling bottom, utilize cartridge extractor
Air cooling time before quenching oil pumps rapidly the movable floor of tooling, is being entered cartridge extractor using cartridge extractor air cooling time
It is separated before oily with tooling, cartridge extractor part is made individually to enter oil hardening.Tooling is shown in Fig. 5, Fig. 6.
2) process and result are tested
This test uses two methods:
Method 1: tooling bottom is not filled by asbestos, sees Fig. 5, and test result is shown in Table 2.
Table 2 is not filled by asbestos testing result by the protection of Fig. 5 tooling
Table 2 the result shows that: bottom be not filled by asbestos quenching after, graphite particle furnace quenching test result all meets product figure
Sample technical requirements.
Method 2: a small amount of asbestos of tooling underfill are shown in Fig. 6, test result such as table 3.(note: reset condition hardness in table 3
It is to make test specimen using part quenched in method 1)
Table 3 is by Fig. 6 tooling protection filling asbestos testing result
Table 3 the result shows that: after a small amount of asbestos of underfill, quenching position work well, non-quenching position hardness is
It reduces, through analyzing, possible cause are as follows: after asbestos protection, heat affected area poor radiation causes temperature raising to make the quenched position of part
Generate double tempering.
3) conclusion
After above-mentioned tooling thermal insulation protection, selective hardening is carried out using method 1, selective hardening works well.
In conclusion a kind of method based on the quenching of fluidised form graphite particle stove heating parts locally, its step are as follows:
Step 1: the heating protecting device of form Design part is quenched according to parts locally；
Heating part will be needed to be placed in outside protective device, heating part is not needed and be closed in heating protecting device, for
This example part cartridge extractor, heating protecting device are that bottom is provided with U-lag and the box body structure with upper cover.
Step 2: design non-quenching position thermal insulation protection means；
Thermal insulation layer is arranged in box body surrounding, with a thickness of 10mm ± 1, filling fire resisting material, such as aluminosilicate refractory fiber, to being not required to
The position to be quenched is subject to thermal insulation protection.
Step 3: control graphite particle furnace cloth wind flow；
The features such as according to the size of quenching part, shape, thickness, thickness≤20mm part control cloth wind flow in
Degree controls voltage in 250 ± 5V.
Step 4: design separation quenching means.
According to part shape feature as shown in Figure 1, there is a projecting hook in part end, for before quenching rapidly by part with
Tooling separation designs a movable floor in tooling bottom, the air cooling time before oil is quenched using cartridge extractor, by the activity of tooling
Bottom plate pumps rapidly, separates cartridge extractor with tooling before entering oil using cartridge extractor air cooling time, enters cartridge extractor part individually
Oil hardening.
Embodiment 2:
Based on 1 method of embodiment, cartridge extractor selective hardening process is as follows:
1, it is loaded
Part is packed into tooling as shown in Figure 5, and aluminosilicate refractory fiber is packed into thermal insulation layer, makes part non-quenching
Position insulation blocking.Certainly, one skilled in the art will appreciate that being not limited to aluminosilicate refractory fiber herein, it can be used and any have
The material of fire resisting and thermal insulation property is packed into separation layer.
2, device parameter is adjusted
Control cloth wind flow is adjusted in moderate, controls voltage in 250V.
3, selective hardening
After being kept the temperature according to technological parameter, the movable floor of tooling is pumped rapidly, using cartridge extractor air cooling time by draw tube
Son separates before entering oil with tooling, and part is individually entered oil hardening.
In order to illustrate the contents of the present invention and implementation method, this specification gives above-mentioned specific embodiment.But ability
Field technique personnel should be understood that the present invention is not limited to above-mentioned preferred forms, anyone can obtain under the inspiration of the present invention
Other various forms of products out, however, make any variation in its shape or structure, it is all have it is same as the present application or
Similar technical solution, is within the scope of the present invention.
Claims (7)
1. a kind of method based on the quenching of fluidised form graphite particle stove heating parts locally, it is characterised in that: the following steps are included:
Step 1: non-quenching position is protected according to the heating protecting device that parts locally quenches form Design workpiece；
Step 2: design non-quenching position thermal insulation protection means；
Step 3: control graphite particle furnace cloth wind flow；
Step 4: design separation quenching means.
2. a kind of method based on the quenching of fluidised form graphite particle stove heating parts locally according to claim 1, feature
Be: the heating protecting device is barrel-like structure or box-like knot equipped with the opening and movable top lid for allowing quenching position to stretch out
Structure.
3. a kind of method based on the quenching of fluidised form graphite particle stove heating parts locally according to claim 1, feature
Be: the non-quenching position thermal insulation protection means are that thermal insulation layer and filling fire resisting material are arranged on heating protecting device.
4. a kind of method based on the quenching of fluidised form graphite particle stove heating parts locally according to claim 3, feature
Be: the refractory material is aluminosilicate refractory fiber.
5. a kind of method based on the quenching of fluidised form graphite particle stove heating parts locally according to claim 1, feature
Be: the control graphite particle furnace cloth wind flow is that cloth wind flow is controlled for thickness≤20mm part in moderate, control
Voltage is in 250 ± 5V.
6. -5 any a kind of method based on the quenching of fluidised form graphite particle stove heating parts locally according to claim 1,
It is characterized by: the separation quenching means are that movable floor is arranged on heating protecting device, hold that it after part loading
It is easy to install, it is easy to take out before quenching.
7. a kind of method based on the quenching of fluidised form graphite particle stove heating parts locally according to claim 6, feature
Be: the movable floor is the laminated structure with boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811264799.XA CN109252023B (en) | 2018-10-29 | 2018-10-29 | Method for heating part local quenching based on fluidized graphite particle furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811264799.XA CN109252023B (en) | 2018-10-29 | 2018-10-29 | Method for heating part local quenching based on fluidized graphite particle furnace |
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| Publication Number | Publication Date |
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| CN109252023A true CN109252023A (en) | 2019-01-22 |
| CN109252023B CN109252023B (en) | 2020-08-11 |
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| CN201811264799.XA Active CN109252023B (en) | 2018-10-29 | 2018-10-29 | Method for heating part local quenching based on fluidized graphite particle furnace |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996006198A1 (en) * | 1994-08-22 | 1996-02-29 | The Torrington Company | Surface treated iron bearing element |
| CN101086030A (en) * | 2006-06-08 | 2007-12-12 | 江苏亚星锚链有限公司 | Heat insulation device for protecting anchor chain adjacent ring |
| CN102134633A (en) * | 2011-01-20 | 2011-07-27 | 北京卫星制造厂 | Precise heat treatment method of high-precision elastic element |
| CN102864294A (en) * | 2012-10-09 | 2013-01-09 | 贵州师范大学 | Method and device of local heat treatment for thin-walled tubular parts |
| CN204265802U (en) * | 2014-11-27 | 2015-04-15 | 济南重工股份有限公司 | Plunger quenching frock |
| JP6311955B2 (en) * | 2012-07-24 | 2018-04-18 | 日立金属株式会社 | Mold quenching method |
| CN108588386A (en) * | 2018-05-21 | 2018-09-28 | 江苏万力机械股份有限公司 | A kind of production method of high intensity bent axle |
-
2018
- 2018-10-29 CN CN201811264799.XA patent/CN109252023B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996006198A1 (en) * | 1994-08-22 | 1996-02-29 | The Torrington Company | Surface treated iron bearing element |
| CN101086030A (en) * | 2006-06-08 | 2007-12-12 | 江苏亚星锚链有限公司 | Heat insulation device for protecting anchor chain adjacent ring |
| CN102134633A (en) * | 2011-01-20 | 2011-07-27 | 北京卫星制造厂 | Precise heat treatment method of high-precision elastic element |
| JP6311955B2 (en) * | 2012-07-24 | 2018-04-18 | 日立金属株式会社 | Mold quenching method |
| CN102864294A (en) * | 2012-10-09 | 2013-01-09 | 贵州师范大学 | Method and device of local heat treatment for thin-walled tubular parts |
| CN204265802U (en) * | 2014-11-27 | 2015-04-15 | 济南重工股份有限公司 | Plunger quenching frock |
| CN108588386A (en) * | 2018-05-21 | 2018-09-28 | 江苏万力机械股份有限公司 | A kind of production method of high intensity bent axle |
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| CN109252023B (en) | 2020-08-11 |
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