CN107034348B - The western-style food tool heat treatment method and its device of 2CR13 material - Google Patents
The western-style food tool heat treatment method and its device of 2CR13 material Download PDFInfo
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- CN107034348B CN107034348B CN201710324334.8A CN201710324334A CN107034348B CN 107034348 B CN107034348 B CN 107034348B CN 201710324334 A CN201710324334 A CN 201710324334A CN 107034348 B CN107034348 B CN 107034348B
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- cutter
- heating zone
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- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/18—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for knives, scythes, scissors, or like hand cutting tools
-
- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/004—Dispersions; Precipitations
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
Abstract
The present invention provides a kind of western-style food tool heat treatment methods of 2CR13 material, step: the A, pre-preparation that tool blank is put, B, it is put into the rest area of mesh belt, C, into heating zone, and it is filled with nitrogen, D, cool down into cooling zone, step A specifically: worker's hand grabs a cutter and is put into empty pallet, and several times of flat wiping back and forth, cutter are pressed into clip slot in turn on the cutter of pallet with palm, make to form two to five millimeters of spacing between two neighboring cutter, completes the loading cutter work an of pallet；And continue the loading cutter operation of the next pallet of progress successively, the method of the present invention is simple, easy to use, and spacing can effectively be kept between each western-style food cutter to improve thermal effectiveness in favor of 2CR13 material, and appliance arrangement structure is simple, is conducive to a wide range of promote and apply.
Description
Technical field
The invention belongs to technical field of metal heat treatment, are specifically related to the western-style food tool heat treatment method of 2CR13 material
And its device.
Background technique
2Cr13 belongs to martensitic stain less steel, is magnetic, hardness is good.Its chemical analysis is carbon C:0.16~0.25；Silicon Si :≤
1.00；Manganese Mn :≤1.00；Sulphur S :≤0.030；Phosphorus P :≤0.035；Chromium Cr:12.00~14.00；Nickel: allow containing≤
0.60。
Hardness is high under 2Cr13 stainless steel as-quenched, and corrosion resistance is good.It is many to be used to make cutter, it is " cutlery grade " geneva
Body steel, is also used for surgical cutter, and the scope of application is very wide.2Cr13 density is 7.75g/cm3；2Cr13 quenching hardness: general
The hardening heat of 2Cr13 is at 980~1050 DEG C, and hardness will be significantly lower than 1050 DEG C of heating oil quenchings when taking 980 DEG C of heating oil quenchings,
Hardness is 45~50HRC after 980 DEG C of oil quenchings, and hardness wants high 2HRC after 1050 DEG C of oil quenchings.But the tissue obtained after 1050 DEG C of quenchings
Crystal grain is thicker, and brittleness is big.
It is as follows for the prior art of martensitic stain less steel heat treatment, the horse of 102978535 A of China Patent Publication No. CN
The heat treatment method of family name's body anti-bacteria stainless steel comprising following steps: (1) 1000-1100 DEG C solution treatment 0.5-1 hours, oil
It is cooled to room temperature；(2) 500-800 DEG C heat preservation 2-6 hours, be air-cooled to room temperature；(3) 980-1020 DEG C solution treatment 3-10 points
Clock, oil are cooled to room temperature；(4) 150-250 DEG C heat preservation 1-2 hours, are air-cooled to room temperature.This martensite antimicrobial stainless steel is for making
Make the stainless steel product of sanitary apparatus, food utensil, tableware, cutlery or medical devices call high intensity, high rigidity.Chinese patent
Publication number CN203269986U discloses stainless steel tableware heat-treatment furnace feeding device, including heat-treatment furnace feed inlet is arranged in
Retaining groove is fed, the charging steel band for being provided in retaining groove and extending in heat treated furnace is fed, feeds and is provided with adjusting charging on retaining groove
The height adjustment mechanism of the gradient.104152655 A of China Patent Publication No. CN discloses a kind of heat treatment frame of resistance to hot material, knot
Structure is groined type, and the heat treatment frame of resistance to hot material is casting, and the material frame material contains high temperature alloy.
The material for making western-style food cutter now largely uses 2cr13 material, due to material ratio 2Cr13N 2Cr13Ni
Price it is low so favor by vast tableware factory, but the corrosion resistance of the material (2Cr13) can not show a candle to 2Cr13N and
2Cr13NI's is excellent, annoyings each tableware manufacturing firm always for a long time.Current western-style food cutter is when entering heating zone
It waits, is that tool blank is carried by pallet, these blanks are packed together, stick to each other, and carry out hot place entering heating zone
When reason, causes many tableware heat treatment degrees not enough and then rejection rate is caused to increase.In addition, the side of existing heat treatment process
Method can also impact the increase of rejection rate.For this reason, it may be necessary to be directed to the western-style food tool heat treatment method and device of 2CR13 material
It improves.
Summary of the invention
It is easy to use the purpose of the present invention is to provide a kind of method is simple, can effectively keep each western-style food cutter it
Between spacing improve thermal effectiveness in favor of 2CR13 material, and appliance arrangement structure is simple, conducive to what is promoted and applied on a large scale
A kind of the western-style food tool heat treatment method and its device of 2CR13 material.
To solve the above problems, the present invention provides a kind of western-style food tool heat treatment methods of 2CR13 material, wherein packet
Include following steps:
A, the pre-preparation that tool blank is put
B, it is put into the rest area of mesh belt
C, into heating zone, and it is filled with nitrogen
D, cool down into cooling zone
E, the cutter sorting after heat treatment, the pallet vacated continue step A operation.
Further, step A specifically: worker's hand grabs a cutter and is put into empty pallet, with palm on the cutter of pallet
Several times of flat wiping back and forth, cutter are pressed into clip slot in turn, are made to form two to five millimeters of spacing between two neighboring cutter, are completed one
The loading cutter of pallet works；And continue the loading cutter operation of the next pallet of progress successively,
Further, step B is by multiple pallets for having been charged into cutter, puts the rest area of mesh belt, and mesh belt is by pallet band
Enter furnace body, successively pass through the heating zone and cooling zone of furnace body, the speed of service of mesh belt are as follows: heating zone length/20 minute=mesh belt moves
Dynamic speed.
Further, step C is that the first heating zone is preheated, and the second heating zone, third heating zone are heating process
Heat preservation zone, temperature are respectively as follows: 1000 DEG C of the first heating zone, and the second 1050 DEG C of heating zone, 1070 DEG C of third heating zone, pallet exists
The run duration of entire heating zone is 20 minutes.
Further, ammonia is filled with ammonia dore furnace by ammonia tank, and ammonia dore furnace ammonia after 800 degree of heating decomposes
At the mixed gas of hydrogen and nitrogen, wherein 75%H2,25%N2, H2 and N2 enter the first heating of furnace body by gas inlet pipe
In area, H2 reduces the air in furnace body heating zone, so that heating zone is formd the environment protected by N2, product is in this environment
In lower heating process, the spacing between cutter on pallet makes nitrogen sufficiently surround the cutter being heat-treated, and effectively avoids surface
It is oxidized.
Further, the furnace body of cooling zone is made of double-skin duct, among double-skin duct by cooling water circulation constitute it is cold
But area, the temperature of the cooling water in cooling zone are 15-20 degrees Celsius, and mesh belt delivery tray enters cooling zone, the cutter on pallet
Between spacing be conducive to that cutter is made to radiate, the tool temperature for exporting cooling zone is lower than 60-80 degrees Celsius.
Purpose to better implement the present invention, the invention also discloses the western-style food tool heat treatment method institutes of 2CR13 material
Annealing device, including rack, furnace body, ammonia tank, ammonia dore furnace, cooling tower and circulating water pool, the two end axles of rack
It is connected with roll shaft, upper rack is fixed with furnace body, and mesh belt is covered on roll shaft, and mesh belt passes through furnace body, and one of roll shaft passes through electricity
Machine is driven and then drives mesh belt movement, wherein furnace body is divided into heating zone and cooling zone, and the first heating zone, second are divided into heating
Heating zone, third heating zone are plugged and connected with several heating carbon-points on the wall of heating zone, move to the mesh belt shape of heating zone side
At rest area, be placed with multiple pallets on rest area, the left and right sides of pallet is integrally formed to be provided with backplate, pallet it is upper
Side is integrally formed to be provided between multiple teeth are convex, and two neighboring tooth is convex and constitutes clip slot, and clip slot is for being embedded in cutter and then making
Spacing between two neighboring cutter is 2-5mm.
Further, ammonia tank is provided with safety valve and pressure valve, ammonia on pipeline by piping connection to ammonia dore furnace
The outside of the flue of gas dore furnace is enclosed with heating furnace silk, and heating furnace silk is used to for flue to be heated to 800 degrees Celsius and then makes ammonia
Gas is decomposed into the mixture of nitrogen and hydrogen, and the mixture of nitrogen and hydrogen is filled into the first heating of furnace body by gas inlet pipe
In area and then by air it is discharged entire heating zone, the air in the hydrogen reducing heating zone of furnace body makes heating zone form one
A environment by nitrogen protection, for product in such circumstances in heating process, the spacing between cutter on pallet keeps nitrogen abundant
The cutter being heat-treated is surrounded, effectively surface is avoided to be oxidized.
Further, the cooling zone of furnace body is double-layer structure, and circulation has cooling water in cooling zone, and circulating water pool passes through water pump
Cooling water is pumped into cooling zone, cooling tower, circulating water pool, water pump and cooling zone constitute cooling water circulation passageway and then guarantee cold
But the water temperature of the cooling water in area is 15-20 degrees Celsius, and mesh belt drives the pallet for being loaded with cutter by heating zone and cooling zone, support
The spacing between cutter on disk is conducive to that cutter is made to radiate, and the temperature of the cutter behind cooling zone is lower than 60-80 degrees Celsius, adds
Hot zone temperature is respectively as follows: 1000 DEG C of the first heating zone, and the second 1050 DEG C of heating zone, 1070 DEG C of third heating zone, pallet is entire
The run duration of heating zone is 20 minutes.
Further, the metallographic microscope of the cutter after the present apparatus is heat-treated is shown are as follows: martensite and a small amount of disperse
Dotted carbide.(apparatus and method of the present invention effectively increases the corrosion resistance of 2CR13 material, after common heat treatment
Cutter is shown as martensite+granule carbonide under metallographic microscope).
Further, cooling circulating water water consumption about 3m3/h.
Advantages of the present invention is that method is simple, easy to use, can effectively keep between each western-style food cutter spacing with benefit
Improve thermal effectiveness in 2CR13 material, and appliance arrangement structure is simple, be conducive to it is a wide range of promote and apply, specifically: 1, this
Invention carries tool blank by pallet, moreover, the spacing between tool blank quickly can be adjusted to 2-5mm,
The effect that this spacing generates is huge, is both conducive to surround cutter entirely by nitrogen, avoid in heating process
Oxidation, moreover, in cooling procedure, can fast cooling, improve production efficiency, reduce rejection rate.2, make the Jin Xiangfa of cutter
The metallographic microscope of cutter of the changing after the present apparatus is heat-treated is shown are as follows: martensite and the dotted carbide of a small amount of disperse.
(apparatus and method of the present invention effectively increases the corrosion resistance of 2CR13 material, and the cutter after common heat treatment is aobvious in metallographic
Martensite+granule carbonide is shown as under micro mirror).3, rejection rate reduces 25% or so.
Detailed description of the invention:
Fig. 1 is the stereoscopic schematic diagram of pallet of the invention.
Fig. 2 is the overlooking state figure that pallet of the invention is packed into after cutter.
Fig. 3 is annealing device schematic diagram of the invention.
Fig. 4 is heat treatment flow diagram of the invention.
Fig. 5 is the test specimens that the comparative experiments of Metallographic Analysis is carried out after the present invention is heat-treated with the prior art.
Fig. 6 is the Metallographic Analysis of sample of the present invention.
Fig. 7 is the Metallographic Analysis of prior art sample.
Attached drawing mark:
1, clip slot 2, tooth be convex 3, pallet 4, backplate
5, cutter 6, rest area 7, flue 8, heating carbon-point
9, the first heating zone 10, the second heating zone 11, third heating zone 12, gas inlet pipe
13, heating furnace silk 14, ammonia dore furnace 15, flue 16, pressure valve
17, safety valve 18, ammonia tank 19, cooling tower 20, circulating water pool
21, water pump 22, rack 23, roll shaft 25, cooling zone
26, furnace body 27, mesh belt
Specific embodiment:
As shown in Figs 1-4, Fig. 1 is the stereoscopic schematic diagram of pallet of the invention.Fig. 2 is after pallet of the invention is packed into cutter
Overlooking state figure.Fig. 3 is annealing device schematic diagram of the invention.Fig. 4 is heat treatment flow diagram of the invention.
The western-style food tool heat treatment method of 2CR13 material of the invention, wherein include the following steps:
A, the pre-preparation that tool blank is put
B, it is put into the rest area of mesh belt
C, into heating zone, and it is filled with nitrogen
D, cool down into cooling zone
E, the cutter sorting after heat treatment, the pallet vacated continue step A operation.
Step A specifically: worker's hand grabs a cutter and is put into empty pallet, and flat wiping is several back and forth on the cutter of pallet with palm
Time, cutter is pressed into clip slot in turn, is made to form two to five millimeters of spacing between two neighboring cutter, is completed the loading of a pallet
Cutter work；And continue the loading cutter operation of the next pallet of progress successively,
Multiple pallets for having been charged into cutter are put the rest area of mesh belt by step B, and mesh belt brings pallet into furnace body, according to
Secondary heating zone and cooling zone by furnace body, the speed of service of mesh belt are as follows: heating zone length/20 minute=mesh belt movement speed.
Step C is that the first heating zone is preheated, the second heating zone, the heat preservation zone that third heating zone is heating process, temperature
Degree is respectively as follows: 1000 DEG C of the first heating zone, and the second 1050 DEG C of heating zone, 1070 DEG C of third heating zone, pallet is in entire heating zone
Run duration be 20 minutes.Ammonia is filled with ammonia dore furnace, ammonia dore furnace ammonia point after 800 degree of heating by ammonia tank
Solution at the mixed gas of hydrogen and nitrogen, wherein 75%H2,25%N2, H2 and N2 by gas inlet pipe enter furnace body first plus
In hot-zone, H2 reduces the air in furnace body heating zone, so that heating zone is formd the environment protected by N2, product is in this ring
Under border in heating process, the spacing between cutter on pallet makes nitrogen sufficiently surround the cutter being heat-treated, and effectively avoids table
Face is oxidized.
The furnace body of cooling zone is made of double-skin duct, constitutes cooling zone by cooling water circulation among double-skin duct, cooling
The temperature of cooling water in area is 15-20 degrees Celsius, and mesh belt delivery tray enters cooling zone, the spacing between cutter on pallet
Conducive to making cutter radiate, the tool temperature for exporting cooling zone is lower than 60-80 degrees Celsius.
Annealing device of the invention, including rack 22, furnace body 26, ammonia tank 18, ammonia dore furnace 14,19 and of cooling tower
Circulating water pool 20, the two end axles of rack 22 are connected with roll shaft 23, and upper rack is fixed with furnace body 26, is covered with mesh belt on roll shaft 23
27, mesh belt 27 passes through furnace body 26, and one of roll shaft 23 drives mesh belt 27 to move by motor drive, which is characterized in that
Furnace body 26 divides for heating zone and cooling zone 25, and the first heating zone 9, the second heating zone 10, third heating zone 11 are divided into heating, adds
Several heating carbon-points 8 are plugged and connected on the wall of hot-zone, the mesh belt 27 for moving to heating zone side forms rest area 6, places
Multiple pallets 3 are placed in area 6, the left and right sides of pallet 3 is integrally formed to be provided with backplate 4, and the upside of pallet 3 is integrally formed
Be provided with multiple teeth convex 2, constitute clip slot 1 between two neighboring tooth convex 2, clip slot 1 is for being embedded in cutter (5) and then making adjacent
Spacing between two cutters (5) is 2-5mm.Ammonia tank 18 to ammonia dore furnace 14, is provided with by piping connection on pipeline
Safety valve 17 and pressure valve 16, the outside of the flue 15 of ammonia dore furnace 14 are enclosed with heating furnace silk 13, and heating furnace silk 13 is used for
The mixture that flue 15 is heated to 800 degrees Celsius and then ammonia is made to be decomposed into nitrogen and hydrogen, the mixture of nitrogen and hydrogen
It is filled into the first heating zone 9 of furnace body 26 by gas inlet pipe 12 and then entire heating zone, hydrogen reducing is discharged in air
Air in the heating zone of furnace body 26, makes heating zone form an environment by nitrogen protection, and product heats in such circumstances
In the process, the spacing between the cutter on pallet 3 makes nitrogen sufficiently surround the cutter being heat-treated, and effectively avoids surface by oxygen
Change.The cooling zone 25 of furnace body 26 is double-layer structure, and circulation has cooling water in cooling zone 25, and circulating water pool 20 will be cold by water pump 21
But water is pumped into cooling zone 25, and cooling tower 19, circulating water pool 20, water pump 21 and cooling zone 25 constitute cooling water circulation passageway in turn
The water temperature for guaranteeing the cooling water in cooling zone 25 is 15-20 degrees Celsius, and mesh belt 25 drives the pallet for being loaded with cutter by heating zone
And cooling zone, the spacing between cutter on pallet are conducive to that cutter is made to radiate, the temperature of the cutter behind cooling zone is lower than 60-
80 degrees Celsius, Heating Zone Temperature is respectively as follows: 1000 DEG C of the first heating zone, the second 1050 DEG C of heating zone, third heating zone 1070
DEG C, run duration of the pallet in entire heating zone is 20 minutes.The metallographic microscope of cutter after the present apparatus is heat-treated is aobvious
It is shown as: martensite and the dotted carbide of a small amount of disperse.(apparatus and method of the present invention effectively increases the corrosion resistant of 2CR13 material
Corrosion energy, the cutter after common heat treatment are shown as martensite+granule carbonide under metallographic microscope).Cooling circulating water water
Dosage about 3m3/h.
Comparative experiments:
The company (Qingdao Kai Mei Household Appliances Limited) that applicant is held will be of the invention on August 28th, 2016
The table knife of method and apparatus heat treatment, the meal being heat-treated with the conventional method heat treatment of progress (table knife heap force together)
Metallographic Analysis, sample number into spectrum FAIRML16080020 are done by knife, inspection Qingdao Fil detection Science and Technology Ltd., and test method is
GB/T 13298-2015, test specimens are as shown in figure 5, Fig. 5 is to carry out Metallographic Analysis after the present invention is heat-treated with the prior art
Comparative experiments test specimens (1# be sample of the present invention, 2# be prior art sample).
Sample pretreating:
Step 1. takes cross section sample from knife handle
Step 2. cleaning, polishing, polishing, corrosion sample
The micro- sem observation of step 3.
Corrosion reagent: Fecl3+Hcl aqueous solution.
Test result
To sum up, advantages of the present invention is that method is simple, easy to use, can effectively keep spacing between each western-style food cutter
So that 2CR13 material improves thermal effectiveness, and appliance arrangement structure is simple, is conducive to a wide range of popularization and application, specifically:
1, the present invention carries tool blank by pallet, moreover, 2- quickly can be adjusted to the spacing between tool blank
5mm, the effect that this spacing generates is huge, is both conducive to surround cutter entirely by nitrogen, avoid heated
Aoxidized in journey, moreover, in cooling procedure, can fast cooling, improve production efficiency, reduce rejection rate.2, make the gold of cutter
The change metallographic microscope of the cutter after the present apparatus is heat-treated of item is shown are as follows: martensite and the dotted carbonization of a small amount of disperse
Object.(apparatus and method of the present invention effectively increases the corrosion resistance of 2CR13 material, and the cutter after common heat treatment is in gold
Martensite+granule carbonide is shown as under phase microscope).3, rejection rate reduces 25% or so.
Claims (7)
1. a kind of western-style food tool heat treatment method of 2CR13 material, which comprises the steps of:
A, the pre-preparation that tool blank is put: step A specifically: worker's hand grabs a cutter and is put into empty pallet, is being held in the palm with palm
Several times of flat wiping back and forth, cutter are pressed into clip slot in turn on the cutter of disk, make to be formed between two to five millimeters between two neighboring cutter
Away from the loading cutter for completing a pallet works；And continue the loading cutter operation of the next pallet of progress successively；
B, it is put into the rest area of mesh belt；
C, into heating zone, and it is filled with nitrogen；
D, cool down into cooling zone；
E, the cutter sorting after heat treatment, the pallet vacated continue step A operation；
The annealing device that the western-style food tool heat treatment method of 2CR13 material uses, including rack (22), furnace body (26), ammonia
Tank (18), ammonia dore furnace (14), cooling tower (19) and circulating water pool (20), the two end axles of rack (22) are connected with roll shaft
(23), rack (22) top is fixed with furnace body (26), is covered on roll shaft (23) mesh belt (27), and mesh belt (27) passes through furnace body (26),
One of roll shaft (23) drives mesh belt (27) to move by motor drive, which is characterized in that furnace body (26) is divided into heating
The first heating zone (9), the second heating zone (10), third heating zone (11) are divided into area and cooling zone (25), heating, heating zone
Several heating carbon-points (8) are plugged and connected on wall, the mesh belt (27) for moving to heating zone side forms rest area (6), places
Be placed in area (6) multiple pallets (3), the left and right sides of pallet (3) is integrally formed to be provided with backplate (4), pallet (3) it is upper
Side is integrally formed, and to be provided with multiple teeth convex (2), constitutes clip slot (1) between two neighboring tooth convex (2), clip slot (1) is for embedding
Enter cutter (5) and then makes the spacing 2-5mm between two neighboring cutter (5)；
Ammonia tank (18) to ammonia dore furnace (14), is provided with safety valve (17) and pressure valve on pipeline by piping connection
(16), the outside of the flue (15) of ammonia dore furnace (14) is enclosed with heating furnace silk (13), and heating furnace silk (13) is used for flue
(15) mixture of the mixture for being heated to 800 degrees Celsius and then ammonia being made to be decomposed into nitrogen and hydrogen, nitrogen and hydrogen passes through
Gas inlet pipe (12) is filled into the first heating zone (9) of furnace body (26) and then entire heating zone, hydrogen reducing is discharged in air
Air in the heating zone of furnace body (26), makes heating zone form an environment by nitrogen protection, product is in such circumstances
In heating process, the spacing between cutter (5) on pallet (3) makes nitrogen sufficiently surround the cutter being heat-treated, and effectively avoids
Surface is oxidized.
2. the western-style food tool heat treatment method of 2CR13 material according to claim 1, which is characterized in that step B by it is multiple
It is packed into the pallet of cutter, puts the rest area of mesh belt, mesh belt brings pallet into furnace body, successively by the heating zone of furnace body and cold
But area, the speed of service of mesh belt are as follows: heating zone length/20 minute=mesh belt movement speed.
3. the western-style food tool heat treatment method of 2CR13 material according to claim 1, which is characterized in that step C is first
Heating zone is preheated, and the second heating zone, the heat preservation zone that third heating zone is heating process, temperature are respectively as follows: the first heating zone
1000 DEG C, the second 1050 DEG C of heating zone, 1070 DEG C of third heating zone, run duration of the pallet in entire heating zone is 20 minutes.
4. the western-style food tool heat treatment method of 2CR13 material according to claim 1, which is characterized in that ammonia tank is by ammonia
It is filled with ammonia dore furnace, ammonia dore furnace ammonia after 800 degree of heating resolves into the mixed gas of hydrogen and nitrogen, wherein
75%H2,25%N2, H2 and N2 enter in the first heating zone of furnace body by gas inlet pipe, and H2 is reduced in furnace body heating zone
Air makes heating zone form the environment protected by N2, and product is in such circumstances in heating process, the cutter on pallet it
Between spacing so that nitrogen is sufficiently surrounded the cutter being heat-treated, effectively surface is avoided to be oxidized.
5. the western-style food tool heat treatment method of 2CR13 material according to claim 1, which is characterized in that the furnace body of cooling zone
It is made of double-skin duct, cooling zone is constituted by cooling water circulation among double-skin duct, the temperature of the cooling water in cooling zone is
15-20 degrees Celsius, mesh belt delivery tray enters cooling zone, and the spacing between cutter on pallet is conducive to that cutter is made to radiate, and makes cold
But the tool temperature of area outlet is lower than 60-80 degrees Celsius.
6. the western-style food tool heat treatment method of 2CR13 material according to claim 1, which is characterized in that furnace body (26) it is cold
But area (25) are double-layer structure, and circulation has cooling water in cooling zone (25), and circulating water pool (20) passes through water pump (21) for cooling water
It is pumped into cooling zone (25), cooling tower (19), circulating water pool (20), water pump (21) and cooling zone (25) constitute cooling water circulation and lead to
Road guarantees that the water temperature of the cooling water in cooling zone (25) is 15-20 degrees Celsius in turn, and mesh belt (27) drives the pallet for being loaded with cutter
By heating zone and cooling zone, the spacing between cutter on pallet is conducive to that cutter is made to radiate, the cutter behind cooling zone
Temperature is lower than 60-80 degrees Celsius, and Heating Zone Temperature is respectively as follows: 1000 DEG C of the first heating zone, and the second 1050 DEG C of heating zone, third adds
1070 DEG C of hot-zone, run duration of the pallet in entire heating zone is 20 minutes.
7. the western-style food tool heat treatment method of 2CR13 material according to claim 1, which is characterized in that filled through Overheating Treatment
The metallographic microscope of cutter after setting heat treatment is shown are as follows: martensite and the dotted carbide of a small amount of disperse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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