CN110004272A - Steel heat treatment method and system - Google Patents
Steel heat treatment method and system Download PDFInfo
- Publication number
- CN110004272A CN110004272A CN201810008227.9A CN201810008227A CN110004272A CN 110004272 A CN110004272 A CN 110004272A CN 201810008227 A CN201810008227 A CN 201810008227A CN 110004272 A CN110004272 A CN 110004272A
- Authority
- CN
- China
- Prior art keywords
- steel
- continuity
- module
- heat treatment
- cooling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- C21D1/62—Quenching devices
- C21D1/63—Quenching devices for bath quenching
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/78—Combined heat-treatments not provided for above
-
- 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
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/13—Modifying the physical properties of iron or steel by deformation by hot working
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The Line Integral rate of the martensitic structure on steel part surface layer can not be obviously improved different from existing carburizing quenching process, a preheating device, a heating furnace, a quenching unit, a hot pressing leveling device, a tempering furnace and an air-cooled pipe device are especially formed a kind of architecture of steel heat treatment system by the present invention.By the use of preheating device and heating furnace, by continuity heat steel to 800~980 DEG C, the quenched induration to the continuity steel is played.Simultaneously using quenching unit (lead-pot furnace) of the invention to the continuity steel after quenched into the processing of row temper fire, more the austenite of continuity steel inner most can be become martensite by transition.The present invention utilizes hot pressing leveling device to flatten the continuity steel in advance, eliminates the internal stress that continuity steel are generated by quenching process.More particularly, the temperature of continuity steel is further down to 100 DEG C hereinafter, can be obviously improved the Line Integral rate of the martensitic structure on continuity steel surface layer in turn using air-cooled pipe device by the present invention.
Description
Technical field
The present invention espespecially a kind of steel heat treatment method and is about the technical field of heat treatment for being applied to intermetallic composite coating
System to carry out quenched, quenching to a continuity steel, process with continous ways such as tempering, and then promotes the continuity steel
Hardness.
Background technique
Carburization process, which is used in, is processed as high-carbon steel mild steel.Specific way is to be connected with the merging of low-carbon steel workpiece
Among one heating environment of carburizing medium (such as: the gases such as methane, ethane), made in the way of high-temperature heating low-carbon steel workpiece
Its austenitizing (Austenite).It is worth noting that low-carbon steel workpiece surface layer transition at austenitic structure process
In, the carbon atom that carburizing medium is decomposited can penetrate into steel part surface layer, increase the phosphorus content in austenitic structure.At this point, because
There is concentration difference for steel piece surface phosphorus content and center portion phosphorus content, the carbon atom for causing surface to be absorbed gradually is spread to center portion.
Finally, when steel part is cooled to room temperature, surface layer austenitizing partly because mixed with carbon atom, therefore martensite can be changed into
(Martensite) structure and Fe3C-structure.
Correlative study is found simultaneously, when changing the heating temperature and cooling velocity of steel, available a variety of different groups
It knits, and these tissues can be maintained to arrive room temperature.Because tissue is not identical, so that steel show different engineering properties.
Therefore, heating appropriate and cooling treatment measure are implemented to steel, its engineering properties can be adjusted.For example, quenching technical
(quenching process) facilitates the hardness and wear resistance for promoting steel part.Further, subsequent research is more found,
Austenite transition be martensite during can simultaneously residual stress in steel surface layer；Therefore, if completing quenching technical in steel part
Be followed by tempered (Tempering), then facilitate remaining austenite transition to be martensite, and eliminate quenching when institute
The stress of generation.The bainite (Pearlite) it is worth noting that remaining austenite is otherwise known as.
China Patent No. publication number: CN102345132A carries out traditional carburization process, quenching technical and tempering process
Improve, then delivered a kind of carburization quenching method, including following technique process:
(A) steel part heating process: is heated to 1050 DEG C~1350 DEG C for the treatment of temperature；
(B) carburization step: being maintained at the treatment temperature for the steel part, is then passed through carburizing medium and makes the steel part
The concentration of carbon that surface layer is penetrated into is in 0.6wt% or less；
(C) primary quenching process: hardening heat as defined in cooling to is quenched；
(D) it keeps the temperature process: the steel part after primary quenching process is maintained at 1000 DEG C or less；
(E) it secondary quenching process: is quenched after the heat preservation process.
China Patent No. publication number: CN102345132A declares that it designs the main purpose of above-mentioned 5 technique processes and is
Shorten the process time of Carburization Treatment；Meanwhile can especially have using the steel part that this 5 technique processes complete heat treatment excellent
Engineering properties and surface hardness.However, the inventor of this case has found according to many years practical experience for being engaged in steel processing, China is specially
Benefit publication number: there is the revealed carburization quenching method of CN102345132A following practice to apply upper defect:
(1) although 5 technique processes can shorten the process time of Carburization Treatment, the phosphorus content of steel part instead by
0.6wt% is limited in hereinafter, steel part semi-finished product is caused to be restricted on the application surface of processing finished product；
(2) although the bainite (Pearlite) of part can be changed into subtle bainite (Fine by secondary quenching process
Pearlite), it but can not be simultaneously obviously improved the Line Integral rate of the martensitic structure on steel part surface layer, therefore in practice for steel part
Surface hardness promotion effect it is limited.
Summary of the invention
Therefore, there is no one for carburization process, quenching technical and the tempering process being heat-treated in steel part in view of the prior art
Criterion is covered for one of ordinary skill in the art's reference implementation accordingly, and present invention is primarily aimed at provide a kind of steel heat treatment method
And system.The present invention especially by a preheating device, a heating furnace, a quenching unit, a flatness correcting machine, a tempering furnace, with
One air-cooled pipe device forms a kind of architecture of steel heat treatment system.Wherein, by the use of preheating device and heating furnace,
It can play by the continuity heat steel of 0.5~1.2wt% of carbon content to 800~980 DEG C to the quenched of the continuity steel
Induration.Meanwhile the continuity steel after quenched are carried out using the specially designed quenching unit (lead-pot furnace) of the present invention
The austenite of continuity steel inner most more can be become martensite by transition by the processing of temper fire.It is worth noting that making
Before hardness with tempering furnace adjustment continuity steel, the present invention particularly flattens the continuity using hot pressing leveling device in advance
Steel eliminate the internal stress that continuity steel are generated by quenching process.More particularly, the present invention further utilizes air-cooled
The temperature of continuity steel is down to 100 DEG C hereinafter, mode enables the inside of continuity steel persistently go bad whereby by pipe device；Also
That is, enabling those remaining, unmetamorphosed austenites continue transition is martensite, and then continuity steel surface layer can be obviously improved
The Line Integral rate of martensitic structure.
In order to reach the main purpose of aforementioned present invention, the inventor of this case provides a reality of the steel heat treatment method
Apply example, including following key step:
(1) one continuity steel are sent into a preheating device using a feeder, it is pre- to bestow one to the continuity steel
Thermal process；
(2) the continuity steel are sent into a heating furnace, to bestow a hot hardening and tempering process to the continuity steel；
(3) the continuity steel are sent into a quenching unit, to bestow a quenching technical to the continuity steel；
(4) the continuity steel are sent into an air-cooled pipe device, to bestow a cooling technique to the continuity steel；
(5) the continuity steel are sent into a hot pressing leveling device, to bestow a thermal crushing technique to the continuity steel；
(6) the continuity steel are sent into a tempering furnace, to bestow a tempering process to the continuity steel；And
(7) the continuity steel that surface is covered with the mud layer are sent into a burnishing device, to the continuity steel
Bestow a processing of surface polishing.
In the embodiment of the steel heat treatment method, which is characterized in that among Yu Suoshu step (2), the heating
One in-furnace temperature of furnace is controlled between 800 DEG C to 980 DEG C, and the protective gas of such as nitrogen or hydrogen is connected in the heating furnace.
In the embodiment of the steel heat treatment method, which is characterized in that the quenching unit can be salt furnace, lead bath
Furnace, water furnace or oil oven, and the hardening heat of the quenching unit is controlled between 250 DEG C to 350 DEG C.
Also, in order to reach the main purpose of aforementioned present invention, the inventor of this case provides the steel heat treatment simultaneously
One embodiment of system comprising:
One preheating device is set on an automatic production line, to receive a continuity steel from a feeder, with right
The continuity steel bestow a pre-heating technique；
One heating furnace is connected in after the preheating device on Yu Suoshu automatic production line, to pair the continuity steel
Material executes a hot hardening and tempering process；
One quenching unit is connected in after the heating furnace on Yu Suoshu automatic production line, holds to the continuity steel
One quenching technical of row；
One air-cooled pipe device is connected in after the quenching unit on Yu Suoshu automatic production line, to the continuity steel
Material executes a cooling technique；
One hot pressing leveling device is connected in after the air-cooled pipe device on Yu Suoshu automatic production line, to the continuity
Steel execute a thermal crushing technique；
One tempering furnace is connected in after the hot pressing leveling device on Yu Suoshu automatic production line, to the continuity steel
Material executes a tempering process；And
One burnishing device is connected in after the tempering furnace on Yu Suoshu automatic production line, to the continuity steel
Bestow a processing of surface polishing.
In the embodiment of the steel heat treatment system, which is characterized in that further include:
One cooling device, be connected on Yu Suoshu automatic production line after the tempering furnace and be located at the burnishing device it
Before, to execute one for warm technique to the continuity steel；
One Mortar spraying machine is connected on Yu Suoshu automatic production line after the cooling device and is located at the burnishing device
Before, to spray a mud layer in the surface of the continuity steel.
In the embodiment of the steel heat treatment system, which is characterized in that further include:
One kerosene cleaning machine is connected in after the burnishing device on Yu Suoshu automatic production line, to the continuity
Steel bestow second of surface clean technique；
One draws material device, is connected in after the kerosene cleaning machine on Yu Suoshu automatic production line, to the continuity
Steel bestow a drawing material and cut out technique；
One collecting machine is connected in after the drawing material device on Yu Suoshu automatic production line, to furl be completed it is all
The continuity steel of heat treatment process step.
Detailed description of the invention
Fig. 1 is a kind of design drawing of the automatic production line of steel heat treatment system of the invention；
Fig. 2 is the perspective view for showing rinse bath；
Fig. 3 is the perspective view for showing preheating device；
Fig. 4 is the perspective view for the lead-pot furnace for showing that the present invention designs；
Fig. 5 A-5F is the stereogram exploded view for showing lead-pot furnace；
Fig. 6 is the perspective view of display plane degree straightening machine；
Fig. 7 is the perspective view for showing air-cooled pipe device；
Fig. 8 is the perspective view for showing hot pressing leveling device；
Fig. 9 is the perspective view for showing cooling device；
Figure 10 is the perspective view for showing Mortar spraying machine；
Figure 11 is the perspective view for showing burnishing device；
Figure 12 is to show the perspective view for drawing material device；And
Figure 13 A, Figure 13 B and Figure 13 C are the flow charts for showing a kind of steel heat treatment method of the invention.
Wherein appended drawing reference are as follows:
Wherein appended drawing reference are as follows:
1 steel heat treatment system
2 continuity steel
10 feeders
11 rinse baths
12 preheating devices
13 heating furnaces
14 quenching units
15 flatness correcting machines
16 air-cooled pipe devices
17 hot pressing leveling devices
18 tempering furnaces
19 cooling devices
1A Mortar spraying machine
1B burnishing device
1C kerosene cleaning machine
1D draws material device
1E collecting machine
148 input modules
141 heating furnaces
142 cooling baths
143 depth adjustment modules
144 heat-dissipating pipes
146 cooling materials remove module
147 refrigerating modules
111 heating tanks
145 exhaust fans
1431 support frames
1432 the first adjustment units
1433 press parts
1434 second adjustment units
1461 accommodating bodies
1462 nipper units
1463 cylinders
151 pedestals
152 guide modules
153 rolling modules
154 adjustment modules
3 steel semi-finished product
161 pedestals
162 first air knife modules
163 second air knife modules
164 workpiece pass through space
165 cooling gas supply modules
171 pedestals
172 supporting modules
173 drive modules
174 flatten module
191 pan feeding modules
192 bellows
193 material discharging modules
1B1 pan feeding module
1B2 polishes case
1B3 material discharging module
1D1 draws material module
1D2 cuts module
1D11 enters material unit
1D12 coiled strip unit
1D13, which rolls, prolongs unit
3 ' customized steel semi-finished product
S1-S6 processing step
S7-S11 processing step
S12-S14 processing step
Specific embodiment
In order to more clearly describe a kind of steel heat treatment method proposed by the invention and system, below in conjunction with
Schema elaborates presently preferred embodiments of the present invention.
Before starting to illustrate steel heat treatment method of the invention, it is necessary to first introduce to realize the steel heat treatment method
A kind of steel heat treatment system.Referring to Fig. 1, being the automatic production line for showing a kind of steel heat treatment system of the invention
Design drawing.As shown in Figure 1, the steel heat treatment system 1 is designed according to the different process website of automatic production line, and wrap
It includes: a feeder 10, a rinse bath 11, a preheating device 12, a heating furnace 13, a quenching unit 14, a flatness correcting machine
15, an air-cooled pipe device 16, a hot pressing leveling device 17, a tempering furnace 18, a cooling device 19, a Mortar spraying machine 1A, one throw
Electro-optical device 1B, a kerosene cleaning machine 1C, one draw a material device 1D and collecting machine 1E.
It must illustrate, the steel heat treatment system of institute's planning and designing of the present invention is mainly to medium carbon steel
Material, high-carbon steel, medium carbon alloy steel material or high carbon alloy steel execute multiple heat treatment process；Wherein, the multiple heat treatment
Technique include at least hot hardening and tempering process (Thermal refining process), quenching technical (Quenching process),
With tempering process (Tempering process).For example, a continuity steel 2 execute the vickers hardness value before heat treatment
For HV130~HV330；After by multiple heat treatment process, the vickers hardness value of the continuity steel 2 is significantly mentioned
Rise to HV350~HV700.Briefly, the use of steel heat treatment system through the invention can not change steel
Under the basis of chemical composition (Chemical composition), in such a way that heat treatment changes the gold inside steel as tissue
Steel are hardened, then adjust the hardness number of steel by tempering process again.
Unceasingly refering to fig. 1, and please refer to Fig. 2 and Fig. 3, the solid of the rinse bath and preheating device that show respectively
Figure.In planning and designing of the invention, rinse bath 11 is after the automatic production is connected in the feeder 10 online and is located at
Before the preheating device 12, to execute first time surface clean technique to continuity steel 2.It is worth noting that Yu Zhihang
During first time surface clean technique, it is after removing the greasy dirt that is had of 2 surface of continuity steel first with degreasing agent,
Followed by the surface for rinsing continuity steel 2 with clear water.Then, it is pre- to execute one to be admitted to preheating device 12 for continuity steel 2
Thermal process.
As shown in Figure 1, heating furnace 13 is to be connected in the preheating device 12 by planning in the design of the automatic production line
Later, to pair continuity steel 2 execute a hot hardening and tempering process (Thermal refining process).Particularly, add
Hot stove 13 has interior boiler tube, and the protective gas filled with such as nitrogen or hydrogen among interior boiler tube, to apply in hot hardening and tempering process
In capable process, the function of protection continuity steel 2 is played.It during executing hot hardening and tempering process, is added by heating wire
The heat interior boiler tube, and then the continuity steel 2 among interior boiler tube are heated to 800~980 DEG C, also that is, being more than critical-temperature
Ac3.Furthermore quenching unit 14 is connected in after the heating furnace 13 in the planning and designing of the automatic production line, to right
Continuity steel 2 execute a quenching technical.Among the present invention, quenching unit 14 can be salt furnace, lead-pot furnace, water furnace or oil oven.
However, if can achieve optimal quenching effect using the specially designed lead-pot furnace of the present invention as main quenching unit 14.
The perspective view for the lead-pot furnace that Fig. 4 display present invention designs；Wherein, the lead-pot furnace designed by the present invention is (that is, quenching dress
14) set includes: an input module 148, a heating furnace 141, a cooling bath 142, a depth adjustment module 143, at least one heat dissipation
Pipe 144, cooling material removal module 146 and a refrigerating module 147.The heating furnace 11 has a heating tank 111；And
And the cooling bath 12 is set among heating tank 111 interior and fills a cooling material.It must especially emphasize, the present invention
It is not particularly limited the type for the cooling material being passed through in cooling bath 142；Therefore, the cooling material may, for example, be: water, water
Alkali polymer, the salt polymer of water, oil, liquid tin, liquid Zn, liquid bismuth or liquid lead.On the other hand, the input module
148 are connected to cooling bath 142, to by continuity steel 2 input cooling bath 142 in, into using cooling material complete for
The quenching process of the continuity steel 2.The continuity steel 2 of heat hardening processing are completed with about 800 in supplementary explanation
DEG C temperature；At this point, in order to guarantee that each position of continuity steel 2 can be quickly cooled down from high temperature austenite area to reach
At quenching effect, the temperature of the cooling material in cooling bath 142 is especially maintained 250-450 using heating furnace 141 by the present invention
Between DEG C.It is designed in this way, it, can be quick after the continuity steel 2 that heat hardening processing is completed are admitted to cooling bath 142
Ground is cooled to about 280 DEG C or so of temperature, and mode ties the austenite (Austenite) inside continuity steel 2 whereby
Structure is rotten to become martensite (Martensite) structure and Fe3C-structure.
On the other hand, as shown in figure 4, the heating tank 141 that an at least heat-dissipating pipe 144 is connected to the heating furnace 141；Its
In, the heat-dissipating pipe 144 connects an exhaust fan 145.Unceasingly refering to Fig. 4, and please refer to lead bath shown by Fig. 5 A-5F
The stereogram exploded view of furnace.According to Fig. 4 and Fig. 5 A-5F it is known that depth adjustment module 143 is be set to cooling bath 142 upper
Side, and include: a support frame 1431, a first adjustment unit 1432, a press part 1433 and a second adjustment unit
1434.Wherein, support frame as described above 1431 is installed on similar to portal frame for the first adjustment unit 1432 and second adjustment unit 1434
Thereon.Also, the first adjustment unit 1432 includes cylinder and moving part.It is designed in this way, as long as being given by an external control module
To control the actuation of cylinder, just press part 1433 can be driven to move down or move up by moving part, and then utilize and support
Casting die 1433 gives the difference of the pressure size of the continuity steel 2, adjusts continuity steel 2 in the cooling bath 142
Soaking depth.On the other hand, second adjustment unit 1434 is a turntable, controls gearing in a manual fashion for on-line operation person
Part drives press part 1433 to move down or move up.In addition, can further be learnt according to Fig. 4 and 5A-5F, the cooling
Substance removal module 146 includes: to connect an accommodating body 1461 of the cooling bath 142, at least nipper units 1462 and at least
One cylinder 1463.
Above description is held, the nipper units 1462 are set in the accommodating body 1461, and its surface is provided with a wiping
Part.On the other hand, which is then connected to nipper units 1462, to control 1462 clamp of nipper units from the cooling bath
142 are input to the continuity steel 2 in accommodating body 1461.Furthermore refrigerating module 147 is herein a cold wind module, is connected to
Cooling material removes module 146, to bestow cooling technique again to the continuity steel 2 for completing cooling material removal technique.
As known to the technical staff for being familiar with steel heat treatment process, quenching technical is by by high temperature (800-980
DEG C) continuity steel 2 be quickly cooled to 250-350 DEG C or so so that the austenite inside continuity steel 2
(Austenite) structure is rotten becomes martensite (Martensite) structure and Fe3C-structure.It is worth noting that, in austenite
Transition be martensite during can simultaneously residual stress in steel surface layer, while and not all austenite all can completely transition be
Martensite.Unceasingly refering to fig. 1, and please refer to Fig. 6 and Fig. 7, distinguish display plane degree straightening machine and air-cooled pipe device
Perspective view.In design planning of the invention, flatness correcting machine 15 is that the quenching is connected in automatic production line process
After device 14, a thick pressure technique is executed to the continuity steel 2.By slightly pressing process to give the continuity steel of out-of-flatness
2 squeezing action, to achieve the effect that smooth continuity steel 2 and eliminate its internal stress so that continuity steel 2 start into
Row gold is as tissue change.
As shown in fig. 6, the flatness correcting machine 15 includes: a pedestal 151, the guide that is set on the pedestal 151
Module 152, a rolling module 153 and an adjustment module 154；Wherein, which is set on pedestal 151 simultaneously
It is connected in after the guide module 152.In addition, the adjustment module 154 is connected to the rolling module 153, it is described to adjust
Rolling module 153 bestows the size of the rolling force of the continuity steel 2.On the other hand, which is in automation
It is connected in producing line process after the flatness correcting machine 15, to bestow a continued down technique to the continuity steel 2.Such as
Shown in Fig. 7, the air-cooled pipe device 16 include: a pedestal 161, one first air knife module 162, one second air knife module 163, with
An and cooling gas supply module 165；Wherein, the first air knife module 162 and the second air knife module 163 are all set to pedestal 161
On, and be all made of multiple air knife units.
It is worth noting that the first air knife module 162 is corresponding up and down with the second air knife module 163, and a workpiece passes through
Space 164 is formed between the first air knife module 162 and the second air knife module 163；Also, the cooling gas supply module
165 are connected to the first air knife module 162 and the second air knife module 163, to supply a cooling fluid so far two wind
Knife module brushes the continuity steel 2 be sent into the workpiece and pass through space 164 using this two air knife modules with cooling fluid,
And then the constant temperature of continuity steel 2 is cooled to 100 DEG C hereinafter, mode enables the inside of continuity steel 2 continue whereby
It is rotten；Also that is, the austenite for enabling those remaining continues to go bad as martensite, so that 2 overwhelming majority of continuity steel is martensite
Institutional framework.
Please again while refering to fig. 1 and the perspective view of hot pressing leveling device shown by Fig. 8.According to the present invention for heat treatment
The related design of the automatic production line of system, hot pressing leveling device 17 are to be connected in the air-cooled pipe device 16 among automatic production line
Later and it is located at before tempering furnace 18, to bestow a thermal crushing technique to the continuity steel 2.In terms of structure composition, pressure
An at least supporting module 172, the correspondingly connected branch that leveling device 17 includes: a pedestal 171, is set on pedestal 171
An at least drive module 173 for hold mode block 172 and at least one pressing module 174；Wherein, 174 system of pressing module is corresponding
Ground connects the drive module 173, and faces 171 surface of pedestal.It is worth noting that the pressuring flat device 17 be
At a temperature of 100-300 DEG C, the continuity for being placed in 171 surface of pedestal is completed by drive module 173 and pressing module 174
The related of steel 2 flattens process.
Also, as shown in Figure 1, the continuity steel 2 for completing to flatten process can then be sent to tempering furnace 18, to execute one
Tempering process.During executing tempering process, based on the carbon content (0.5-1.2wt%) contained by continuity steel 2
Difference, the in-furnace temperature of tempering furnace 18 are controlled between 200 DEG C to 450 DEG C, and the tempering furnace 18 has interior boiler tube, and interior furnace
Protective gas filled with such as nitrogen or hydrogen among pipe, during tempering process is implemented, to play protection continuity
The function of steel 2.Also, tempering process is to be heated using the heating layer for including heating wire to the interior boiler tube.Tempering
The hardness number of technique not only adjustable continuity steel 2 that quenching technical is completed, while continuity steel 2 can also be removed
The stress that inside does not completely eliminate promotes the obdurability of continuity steel 2.
Unceasingly refering to fig. 1, and simultaneously refering to the perspective view of cooling device shown by Fig. 9.As shown in Figure 1, in automatic
To change among producing line, cooling device 19 is connected in after tempering furnace 18, the temperature of continuity steel 2 is down to room temperature, into
And obtain a steel semi-finished product 3 with particular stiffness value.It must be supplemented with explanation, the particular stiffness value is to be decided by this
The following application product of continuity steel semi-finished product 3.For example, hardness number is between HV350 to the continuity steel between HV600 half
Finished product 3 can be further processed into ink knife.Also, the perspective view of the cooling device according to Fig. 9, can be with
The structure composition for learning cooling device 19 includes: a pan feeding module 191, is set the bellows 192 for connecting the pan feeding module 191
The cold water tube system that is placed in inside the cool wind box 192 and the material discharging module 193 for being connected to the bellows 192.
In order to enable this continuity steel semi-finished product 3 can meet the demand of different clients, the present invention is again in automatic production
It is additionally arranged many back segments online
Processing unit (plant) or equipment, comprising: Mortar spraying machine 1A, burnishing device 1B, kerosene cleaning machine 1C, draw material device 1D,
With collecting machine 1E.Also, Figure 10 is the perspective view for showing Mortar spraying machine, and Figure 11 is the perspective view of the burnishing device shown.
Among the present invention, the Mortar spraying machine 1A is connected in after the cooling device 19 on automatic production line, in
The surface of the continuity steel semi-finished product 3 sprays a mud layer.On the other hand, the burnishing device 1B be in automatic production line it
On be connected in after Mortar spraying machine 1A, and by a pan feeding module 1B1, an a polishing case 1B2 and material discharging module 1B3 institute
Composition.Wherein, the continuity steel semi-finished product 3 are sent into polishing case 1B2 by pan feeding module 1B1 to execute a surface
Polishing process sets kerosene cleaning machine 1C by material discharging module 1B3 submitting later, to the continuity steel for completing surface polishing process
Semi-finished product 3 bestow second of surface clean technique.
The perspective view of material device is please drawn again while refering to fig. 1 and shown by Figure 12.The drawing material device 1D is in certainly
It is connected on dynamicization producing line after kerosene cleaning machine 1C, to bestow a drawing material to the continuity steel semi-finished product 3 and cut
Technique is cut out, to obtain a customized steel semi-finished product 3 ' with proper width and thickness.Wherein, the component packet of material device 1D is drawn
Include: one draws material module 1D1 and one to cut module 1D2；Also, drawing material module 1D1 further comprises: one enter material unit 1D11,
A roll of material unit 1D12 and one, which rolls, prolongs unit 1D13.In execute draw material process when, be using coiled strip unit 1D12 and to roll and prolong list
Continuously elongated steel semi-finished product 3 of the cooperation of first 1D13, to adjust the thickness of steel semi-finished product 3.Then, it completes to draw material process
What steel semi-finished product 3 were sent to rear end cuts module 1D2, and then steel semi-finished product 3 are cut into the one customized of proper width
Steel semi-finished product 3 '.
In this way, above-mentioned completely and clearly demonstrated steel heat treatment system of the invention in an automatic production line programming
Included all process equipments and device.Then, one completed using the steel heat treatment system will hereafter be continued to explain
Kind steel heat treatment method.Please arrange in pairs or groups refering to fig. 1, and simultaneously refering to fig. 1 3A, Figure 13 B corresponded to shown in Figure 13 C it is proposed by the invention
Steel heat treatment method flow chart.As shown in correlative type, steel heat treatment method of the invention is comprised the following steps that:
Step (S1): continuity steel 2 are sent into rinse bath 11 using feeder 10, then complete the continuity steel
2 first time surface clean technique；
Step (S2): continuity steel 2 are sent into preheating device 12, then complete the pre-heating technique of the continuity steel 2；
Step (S3): continuity steel 2 are sent into heating furnace 13, then complete the hot hardening and tempering process of the continuity steel 2；
Step (S4): continuity steel 2 are sent into quenching unit 14, then complete the quenching technical of the continuity steel 2；
Step (S5): continuity steel 2 are sent into flatness correcting machine 15, then complete the thick pressure of the continuity steel 2
Technique；
Step (S6): continuity steel 2 are sent into air-cooled pipe device 16, then complete the cooling work of the continuity steel 2
Skill makes the inside of continuity steel 2 persistently go bad；
Step (S7): continuity steel 2 are sent into hot pressing leveling device 17, then complete the thermal crushing of the continuity steel 2
Technique；
Step (S8): sending continuity steel 2 into tempering furnace 18, then complete the tempering process of the continuity steel 2, by
To adjust the hardness of continuity steel 2；
Step (S9): continuity steel 2 are sent into cooling device 19, are completed using cooling device 19 to continuity steel 2
Cooling processing after, obtain a continuity steel semi-finished product 3；
Step (S10): sending the continuity steel semi-finished product 3 into Mortar spraying machine 1A, then in the continuity steel half
The surface of finished product 3 sprays a mud layer；
Step (S11): the continuity steel semi-finished product 3 that surface is covered with mud layer are sent into burnishing device 1B, are then completed
The processing of surface polishing of the continuity steel semi-finished product 3；
Step (S12): sending continuity steel semi-finished product 3 into kerosene cleaning machine 1C, then completes the continuity steel half
Second of surface clean technique of finished product 3；
Step (S13): steel semi-finished product 3 are sent into and draw material device 1D, then complete the drawing material and sanction of the steel semi-finished product 3
Processing is cut, a customized steel semi-finished product 3 ' with suitable thickness and width are then obtained；
Step (S14): the customized steel semi-finished product 3 ' with suitable thickness and width are furled using collecting machine.
In conclusion being familiar with steel heat treatment with the engineering staff of processing technology it is known that steel proposed by the invention
Material heat treatment system and method are pre- using bestowing to medium carbon steel material, high-carbon steel, medium carbon alloy steel material or high-carbon alloy steel
Heat, hot quenched (Thermal refining process), quenching (Quenching process), thermal crushing, tempering
After the technique processes such as (Tempering process) and cooling down, in the case where not changing the basis of chemical composition of steel,
Promote and adjust the hardness number of steel.Also, for the demand in response to different clients, steel heat processing system proposed by the invention
System more passes through mortar spraying, surface polishing, kerosene cleaning, cold rolling with method and the technique processes such as cuts, and will further have
The steel semi-finished product 3 of particular stiffness value are processed into the customized steel semi-finished product 3 ' with suitable thickness and width.Also,
The type and specification of some common customized steel semi-finished product are organized among following table (1).
Table (1)
Accordingly, the customized steel semi-finished product can be processed into a variety of different steel zero by each steel part processing factory
Part.Some common steel parts putting in order are among following table (2).
Table (2)
In this way, above-mentioned completely and clearly demonstrated steel heat treatment method and system of the invention, via above-mentioned, invention
It is following that people can learn that the present invention has the advantages that:
(1) be different from existing carburizing quenching process can not it is significant promoted steel part surface layer martensitic structure Line Integral
Rate, the present invention is especially by a preheating device 12, a heating furnace 13, a quenching unit 14, a hot pressing leveling device 17, a tempering furnace
18, a kind of architecture of steel heat treatment system is formed with an air-cooled pipe device 16.Wherein, pass through preheating device 12 and heating
The use of furnace 18 can be played continuous to this by the continuity heat steel of 0.5~1.2wt% of carbon content to 800~980 DEG C
The quenched induration of property steel；Meanwhile using the specially designed quenching unit 14 (lead-pot furnace) of the present invention to after quenched
The austenite of 2 inner most of continuity steel more can be become martensite by transition by the processing of continuity steel Jin Hang temper fire.
Before hardness using tempering furnace adjustment continuity steel, the present invention particularly flattens the company using hot pressing leveling device 17 in advance
Continuous property steel eliminate the internal stress that continuity steel are generated by quenching process.More particularly, the present invention further utilizes
The temperature of continuity steel 2 is down to 100 DEG C hereinafter, mode enables the inside of continuity steel 2 continue whereby by air-cooled pipe device 16
It is rotten；Also that is, enabling remaining, unmetamorphosed austenite continue transition is martensite, and then being capable of significant 2 table of promotion continuity steel
The Line Integral rate of the martensitic structure of layer.
It must be subject to detailed description the illustrating for possible embodiments of the present invention, it is emphasized that above-mentioned, only the reality
It is non-to limit the scope of the patents of the invention to apply a Bing, all equivalence enforcements or change without departing from carried out by technical spirit of the present invention,
It is intended to be limited solely by the scope of the patents of this case.
Claims (26)
1. a kind of steel heat treatment method, which comprises the following steps:
(1) one continuity steel are sent into a preheating device using a feeder, to bestow a pre- thermal technology to the continuity steel
Skill；
(2) the continuity steel are sent into a heating furnace, to bestow a hot hardening and tempering process to the continuity steel；
(3) the continuity steel are sent into a quenching unit, to bestow a quenching technical to the continuity steel；
(4) the continuity steel are sent into an air-cooled pipe device, to bestow a cooling technique to the continuity steel；
(5) the continuity steel are sent into a hot pressing leveling device, to bestow a thermal crushing technique to the continuity steel；
(6) the continuity steel are sent into a tempering furnace, to bestow a tempering process to the continuity steel；And
(7) the continuity steel that surface is covered with the mud layer are sent into a burnishing device, to bestow to the continuity steel
One processing of surface polishing.
2. steel heat treatment method according to claim 1, which is characterized in that among Yu Suoshu step (1), this is continuous
Property steel be sent into before the preheating device, first the continuity steel are sent into a rinse bath, to the continuity steel
Bestow first time surface clean technique.
3. steel heat treatment method according to claim 1, which is characterized in that among Yu Suoshu step (2), the heating
One in-furnace temperature of furnace is controlled between 800 DEG C to 980 DEG C, and a protective gas is connected in the heating furnace.
4. steel heat treatment method according to claim 1, which is characterized in that the quenching unit can be salt furnace, lead bath
Furnace, water furnace or oil oven, and a hardening heat of the quenching unit is controlled between 250 DEG C to 350 DEG C.
5. steel heat treatment method according to claim 1, which is characterized in that between the step (3) and step (4) more
The following steps are included:
(3.1) this bestows a flatness adjusting process to the continuity steel using a flatness correcting machine.
6. steel heat treatment method according to claim 1, which is characterized in that among the step (4), the continuity
Steel are cooled to 100 DEG C or less.
7. steel heat treatment method according to claim 1, which is characterized in that between the step (6) and step (7) more
The following steps are included:
(6.1) the continuity steel are sent into a cooling device, to bestow a temperature reduction technology to the continuity steel；And
(6.2) the continuity steel are sent into a Mortar spraying machine, to spray a mud layer in the surface of the continuity steel.
8. steel heat treatment method according to claim 1, which is characterized in that further include following steps:
(8) the continuity steel are sent into a kerosene cleaning machine, to bestow second of surface clean technique to the continuity steel；
(9) the continuity steel are sent into one and draw material device, to bestow a drawing material to the continuity steel and cut out technique；
(10) the continuity steel are furled using a collecting machine.
9. steel heat treatment method according to claim 1, which is characterized in that the continuity steel can be following any
Person: medium carbon steel material, high-carbon steel, medium carbon alloy steel material or high carbon alloy steel.
10. steel heat treatment method according to claim 3, which is characterized in that the protective gas can be following any
Person: nitrogen or hydrogen.
11. steel heat treatment method according to claim 7, which is characterized in that the mud layer includes a grease and one
Polishing sand.
12. a kind of steel heat treatment system, characterized in that it comprises:
One preheating device is set on an automatic production line, to receive a continuity steel from a feeder 10, to this
Continuity steel bestow a pre-heating technique；
One heating furnace is connected in after the preheating device on Yu Suoshu automatic production line, to pair the continuity steel hold
The hot hardening and tempering process of row one；
One quenching unit is connected in after the heating furnace on Yu Suoshu automatic production line, executes one to the continuity steel
Quenching technical；
One air-cooled pipe device is connected in after the quenching unit on Yu Suoshu automatic production line, holds to the continuity steel
One cooling technique of row；
One hot pressing leveling device is connected in after the air-cooled pipe device on Yu Suoshu automatic production line, to the continuity steel
Execute a thermal crushing technique；
One tempering furnace is connected in after the hot pressing leveling device on Yu Suoshu automatic production line, to hold to the continuity steel
One tempering process of row；And
One burnishing device is connected in after the tempering furnace on Yu Suoshu automatic production line, to bestow to the continuity steel
One processing of surface polishing.
13. steel heat treatment system according to claim 12, which is characterized in that further include a rinse bath, Yu Suoshu
It is connected in after the feeder and is located at before the preheating device on automatic production line, to execute the to the continuity steel
One-time surface cleaning process.
14. steel heat treatment system according to claim 12, which is characterized in that further include:
One flatness correcting machine is connected on Yu Suoshu automatic production line after the quenching unit and is located at the air-cooled pipe device
Before, to execute a thick pressure technique to the continuity steel.
15. steel heat treatment system according to claim 12, which is characterized in that further include:
One cooling device is connected on Yu Suoshu automatic production line after the tempering furnace and is located at before the burnishing device, uses
To execute one for warm technique to the continuity steel；
One Mortar spraying machine, be connected on Yu Suoshu automatic production line after the cooling device and be located at the burnishing device it
Before, to spray a mud layer in the surface of the continuity steel.
16. steel heat treatment system according to claim 12, which is characterized in that the quenching unit includes:
One heating furnace has a heating tank；
One cooling bath is set in the heating tank, and fills a cooling material；Wherein, the heating furnace is in the continuity
Steel start to carry out to maintain its temperature before cooling technique, and the cooling bath is to bestow the quenching to the continuity steel
Technique；And
One depth adjustment module, set on the top of the cooling bath, to adjust the continuity steel among the cooling bath
One soaking depth.
17. steel heat treatment system according to claim 12, which is characterized in that the burnishing device includes:
One pan feeding module；
One polishing case, connects the pan feeding module；And
One material discharging module.
18. steel heat treatment system according to claim 12, which is characterized in that the air-cooled pipe device includes:
One pedestal；
One first air knife module is made of multiple air knife units, and is set on the pedestal；
One second air knife module is made of multiple air knife units, and is set on the pedestal；Wherein, the first air knife mould
Block is corresponding up and down with the second air knife module, and a workpiece is formed in the first air knife module and second air knife by space
Between module；And
One cooling gas supply module is connected to the first air knife module and the second air knife module.
19. steel heat treatment system according to claim 12, which is characterized in that the hot pressing leveling device includes:
One pedestal；
An at least supporting module is set on the pedestal；
An at least drive module, the correspondingly connected supporting module；
At least one flattens module, the correspondingly connected drive module, and faces the base-plates surface.
20. steel heat treatment system according to claim 13, which is characterized in that further include:
One kerosene cleaning machine is connected in after the burnishing device on Yu Suoshu automatic production line, to the continuity steel
Bestow second of surface clean technique；
One draws material device, is connected in after the kerosene cleaning machine on Yu Suoshu automatic production line, to the continuity steel
It bestows a drawing material and cuts out technique；
One collecting machine is connected in after the drawing material device on Yu Suoshu automatic production line, is completed at all heat to furl
Manage the continuity steel of processing step.
21. steel heat treatment system according to claim 14, which is characterized in that the flatness correcting machine includes:
One pedestal；
One guide module, is set on the pedestal；
One rolling module, is set on the pedestal, and is connected in after the guide module；
One adjustment module, connects the rolling module, the rolling force of the continuity steel is bestowed to adjust the rolling module
Size.
22. steel heat treatment system according to claim 15, which is characterized in that the cooling device includes:
One pan feeding module；
One bellows connect the pan feeding module；
One cold water tube system is set to inside the cool wind box；
One material discharging module is connected to the bellows.
23. steel heat treatment system according to claim 16, which is characterized in that the quenching unit further includes:
It is connected to an at least heat-dissipating pipe for the heating furnace, and the heat-dissipating pipe more connects an exhaust fan simultaneously；
It is connected to an input module of the cooling bath, the workpiece is inputted the cooling bath.
24. steel heat treatment system according to claim 16, which is characterized in that the quenching unit further includes:
One cooling material removes module, connects the cooling bath, cold to bestow one to the continuity steel for completing cooling technique
But substance removal technique；
One refrigerating module is connected to cooling material removal module, to the company for completing the cooling material removal technique
Continuous property steel bestow cooling technique again.
25. steel heat treatment system according to claim 16, which is characterized in that the depth adjustment module includes:
One support frame, set on the top of the cooling bath；
One the first adjustment unit, is connected to the support frame；
One press part is connected to the first adjustment unit；And
One second adjustment unit, is connected to the support frame and the first adjustment unit；
Wherein, the first adjustment unit made according to the control of an external control module press part move down or to
The difference of the pressure size of the continuity steel is given in upper movement using the press part, adjusts continuity steel in described
Soaking depth in cooling bath；Also, the press part can be directly controlled by the manipulation second adjustment unit to move down
Or it moves up.
26. steel heat treatment system according to claim 20, which is characterized in that the drawing expects that device includes:
One draws material module, including one enters material unit, a roll of material unit and one rolls and prolong unit；And
One cuts module, connects this and rolls and prolongs unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810008227.9A CN110004272B (en) | 2018-01-04 | 2018-01-04 | Steel heat treatment method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810008227.9A CN110004272B (en) | 2018-01-04 | 2018-01-04 | Steel heat treatment method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110004272A true CN110004272A (en) | 2019-07-12 |
| CN110004272B CN110004272B (en) | 2021-08-24 |
Family
ID=67164354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810008227.9A Active CN110004272B (en) | 2018-01-04 | 2018-01-04 | Steel heat treatment method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110004272B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111334657A (en) * | 2020-04-07 | 2020-06-26 | 吴广 | Continuous steel heat treatment equipment |
| CN113587638A (en) * | 2021-06-28 | 2021-11-02 | 河钢股份有限公司 | Heating furnace and method for preparing hot-forming agricultural implement wear-resistant part |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1985716A2 (en) * | 2007-04-27 | 2008-10-29 | Chun Young Park | Apparatus and method for continuously processing long bar by heat treatment using induction heating |
| CN201737980U (en) * | 2010-06-13 | 2011-02-09 | 浙江佰耐钢带有限公司 | Steel strip hot treatment system with residual-heat utilization device |
| CN201834950U (en) * | 2010-09-30 | 2011-05-18 | 曹玉贵 | Multifunctional same-furnace multi-band full-automatic production line for heat treatment of bimetallic band saw blade |
| CN103215430A (en) * | 2013-04-23 | 2013-07-24 | 冯伟年 | Novel technique for isothermal heat treatment of steel wire |
| CN106111737A (en) * | 2016-06-24 | 2016-11-16 | 常州市瑞悦车业有限公司 | A kind of coil of strip Sheet forming |
-
2018
- 2018-01-04 CN CN201810008227.9A patent/CN110004272B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1985716A2 (en) * | 2007-04-27 | 2008-10-29 | Chun Young Park | Apparatus and method for continuously processing long bar by heat treatment using induction heating |
| CN201737980U (en) * | 2010-06-13 | 2011-02-09 | 浙江佰耐钢带有限公司 | Steel strip hot treatment system with residual-heat utilization device |
| CN201834950U (en) * | 2010-09-30 | 2011-05-18 | 曹玉贵 | Multifunctional same-furnace multi-band full-automatic production line for heat treatment of bimetallic band saw blade |
| CN103215430A (en) * | 2013-04-23 | 2013-07-24 | 冯伟年 | Novel technique for isothermal heat treatment of steel wire |
| CN106111737A (en) * | 2016-06-24 | 2016-11-16 | 常州市瑞悦车业有限公司 | A kind of coil of strip Sheet forming |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111334657A (en) * | 2020-04-07 | 2020-06-26 | 吴广 | Continuous steel heat treatment equipment |
| CN113587638A (en) * | 2021-06-28 | 2021-11-02 | 河钢股份有限公司 | Heating furnace and method for preparing hot-forming agricultural implement wear-resistant part |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110004272B (en) | 2021-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4906651B2 (en) | Heat treatment method for steel rail and heat treatment apparatus used therefor | |
| JP2008069456A6 (en) | Heat treatment method for steel rail and heat treatment apparatus used therefor | |
| US10472696B2 (en) | Method for intercooling sheet steel | |
| CN106756753A (en) | The carburization quenching method of low-speed heavy-loaded gear | |
| CN100489123C (en) | Method and apparatus for continuous heat treatment for long bar by inducted heating | |
| CN108251609B (en) | A kind of saw blade heat treatment process | |
| CN101660036B (en) | Heat treating method of high strength and high ductility steel tube | |
| CN108277449A (en) | A kind of heat treatment method carrying out carburizing and quenching to low-carbon alloy steel workpiece | |
| CN102337385A (en) | Multi-cycle quenching-partitioning-tempering (M Q-P-T) technique | |
| CN110004272A (en) | Steel heat treatment method and system | |
| CN102758140A (en) | High-carbon microalloying steel ball and production process thereof | |
| CN1154413A (en) | Process for heat treatment of steel rail | |
| US20170044643A1 (en) | Method and apparatus for producing a steel strip | |
| CN111002000B (en) | Processing method for improving grain size of flexible gear of harmonic reducer | |
| CN101868557A (en) | Process of thermal treatment of rails and device thereof | |
| CN106755911B (en) | A kind of driving gear axle thread and R angles heat treatment process and equipment | |
| CN113481352A (en) | Quenching heat treatment process for wear-resisting plate | |
| CN115109899A (en) | Heat treatment process of low-carbon alloy steel material | |
| CN103409600B (en) | Workpiece quenching lathe and quenching method thereof | |
| CN104561502B (en) | The production method of high-hardenability steel ball | |
| CN111172368A (en) | Process and circulation system combining steel wire hot rolling and sorbitizing treatment | |
| CN112708734A (en) | Heat treatment process for improving wear resistance | |
| KR20080082219A (en) | Metal isothermal annealing heat treatment method | |
| CN106609317A (en) | Rotary soak quenching device for small-sized carbon steel | |
| CN208055401U (en) | Workpiece cooling system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |