CN114635017B - Spray type heat treatment device and heat treatment method for large metal component - Google Patents
Spray type heat treatment device and heat treatment method for large metal component Download PDFInfo
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- CN114635017B CN114635017B CN202210542412.2A CN202210542412A CN114635017B CN 114635017 B CN114635017 B CN 114635017B CN 202210542412 A CN202210542412 A CN 202210542412A CN 114635017 B CN114635017 B CN 114635017B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 70
- 239000002184 metal Substances 0.000 title claims abstract description 50
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 50
- 239000007921 spray Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 70
- 238000001816 cooling Methods 0.000 claims abstract description 53
- 230000001105 regulatory effect Effects 0.000 claims abstract description 36
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 238000005507 spraying Methods 0.000 claims description 87
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
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- 241001330002 Bambuseae Species 0.000 claims description 6
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 6
- 239000011425 bamboo Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 239000000499 gel Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 230000008520 organization Effects 0.000 claims description 2
- 230000008569 process Effects 0.000 description 10
- 229910045601 alloy Inorganic materials 0.000 description 9
- 239000000956 alloy Substances 0.000 description 9
- 230000001276 controlling effect Effects 0.000 description 9
- 239000002344 surface layer Substances 0.000 description 8
- 229910001069 Ti alloy Inorganic materials 0.000 description 6
- 239000000498 cooling water Substances 0.000 description 5
- 238000004321 preservation Methods 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000110 cooling liquid Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 239000012792 core layer Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
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- 230000002411 adverse Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/84—Controlled slow cooling
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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
- C21D11/00—Process control or regulation for heat treatments
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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- Metallurgy (AREA)
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- Heat Treatments In General, Especially Conveying And Cooling (AREA)
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Abstract
The invention discloses a spray type heat treatment device and a heat treatment method for a large metal component, wherein the heat treatment device comprises a body, a spray part and a control part; the spray type heat treatment device for the large metal component is provided with the spray part of the flow regulating mechanism and the control part of the temperature monitoring mechanism, so that the cooling rate can be effectively ensured to be always kept in a control range, and the problems of non-uniform structure and performance among areas of the large integral component are solved.
Description
Technical Field
The invention relates to the technical field of metal material additive manufacturing, in particular to a spray type heat treatment device for a large metal component for additive manufacturing and a heat treatment method adopting the spray type heat treatment device.
Background
With the development of modern industry, the demand of large-scale integral alloy components in the fields of aerospace, ships, railways and the like is strong. The large alloy integral component can meet the requirements of high strength and light weight of structural components in engineering through structural design, and the performance of the large alloy integral component is mainly influenced by a preparation method and subsequent treatment. The heat treatment is the most important regulation and control method of the metal material, the mechanical property of the alloy member is greatly influenced, and the heat preservation temperature, the time and the cooling rate in the heat treatment process are the most important parameters in the heat treatment process.
For large alloy components, the heat preservation temperature and the heat preservation time are easy to control in the heat treatment process, but because the size difference of the thickness of each area is large, for alloys with low heat transfer coefficient such as titanium alloy, the traditional heat treatment method can cause the temperature change difference of different areas of the components to be large, and the cooling rate of different areas of the large components cannot be controlled, so that the structure and performance difference of different areas of the sample are large, and the performance and long-term service of the large alloy integral component are seriously influenced. Therefore, a device capable of precisely controlling the cooling rate of each region of the large-scale alloy integral component in the heat treatment process so as to improve the uniformity of the structure and the performance of the large-scale component needs to be developed.
Disclosure of Invention
The invention provides and designs a novel spray type heat treatment device for a large metal component, which aims to solve the problem of large variation difference of temperature and cooling speed of different areas of the component in the heat treatment process of the large metal component in the prior art, thereby improving the integral uniformity of the structure and mechanical property of the large alloy integral component. The spraying type heat treatment device for the large metal component controls the whole cooling speed of the large metal component by regulating and controlling the flow rate and the spraying time of cooling water sprayed by the spray heads in different areas of the large metal component and simultaneously monitoring the temperature of the component in real time.
Specifically, the present invention provides a spray type heat treatment apparatus for a large metal member, which is characterized in that:
the heat treatment device comprises a body, a spraying part and a control part;
the body is a frame chamber which is surrounded by three flat plates and has a longitudinal section in the shape of Jiong;
the spraying part comprises a water inlet pipeline, a flow regulating mechanism, a length regulating mechanism and a spraying nozzle;
the control part comprises a temperature monitoring mechanism and a flow control mechanism;
the water inlet pipeline is laid in the body; the water inlet is convexly arranged on the outer wall of the body; a plurality of water outlets are uniformly and convexly arranged on the inner wall of the body;
the flow regulating mechanism, the length regulating mechanism and the spraying nozzles correspond to the water outlets one by one, one end of the flow regulating mechanism is connected with the water outlets, and the other end of the flow regulating mechanism is connected with the spraying nozzles through the length regulating mechanism;
the temperature monitoring mechanism is arranged on the inner wall of the body;
the flow control mechanism is in communication connection with the flow regulating mechanism.
Further preferably, the length adjusting mechanism is a shapeable bamboo joint bent pipe.
Further preferably, the heat treatment device further comprises a steel frame trolley which can be accommodated in the frame chamber and can move out of the frame chamber.
Further preferably, the heat treatment device further comprises a water vapor treatment part arranged on the outer side wall of the body, and the water vapor treatment part comprises an air extractor and a dryer; one end of the dryer is communicated with the inside of the body through a pipeline, and the other end of the dryer is communicated with the air extractor through a pipeline; a plurality of active silica gels and air exchange fans are arranged inside the dryer in a staggered and spaced mode.
More preferably, the frame chamber of the body is provided with openable and closable waterproof curtains at both ends.
Further preferably, the bottom of the body is provided with a waterproof pad.
Further preferably, the bottom of the body is provided with a telescopic travelling wheel.
Specifically, the invention also provides a heat treatment method by using the spray type heat treatment device for the large metal component, which is characterized by comprising the following steps:
determining a target cooling rate according to the material, the shape and the size of the large-sized metal component and the performance of a target structure, setting the spraying flow rate and the spraying time according to the target cooling rate, and inputting the target cooling rate and the spraying time into the flow control mechanism;
moving the heated and heat-preserved large metal component out of the heat treatment furnace and then into the frame chamber, and then adjusting the length adjusting mechanism according to the shape and size of the large metal component to place the spraying nozzle in a spraying station;
and starting the flow regulating mechanism through the flow control mechanism to carry out spraying treatment according to the set spraying flow speed and the set spraying time, monitoring the actual cooling rate of the large-sized metal component in real time through the temperature monitoring mechanism, and regulating the spraying flow speed in real time through the flow control mechanism and the flow regulating mechanism according to the comparison result of the actual cooling rate and the target cooling rate.
It is further preferred that the spray treatment is divided into two stages and that the spray flow rate in the second stage is greater than in the first stage.
Further preferably, after the large metal component is moved into the frame chamber, the large metal component is naturally cooled for 1-3 minutes, and the length adjusting mechanism is adjusted according to the shape and the size of the large metal component and the spraying position so as to place the spraying nozzle in a spraying station.
The invention relates to a spray type heat treatment device and a method for a large metal component, which comprises the following steps:
firstly, the matching of the spraying part with the flow regulating mechanism and the control part with the temperature monitoring mechanism can effectively ensure that the cooling rate is always kept in a control range, and the problems of non-uniform organization and performance among areas of a large-scale integral component are solved;
secondly, the length adjusting mechanism of the hard shapeable bamboo joint bent pipe is used for easily adjusting and controlling the spraying area and the distance between the spraying area and the component, so that the flow rate and the spraying time of cooling liquid in different areas of the component are controlled, and the purpose of controlling the integral cooling speed uniformity of the component is achieved;
thirdly, through the arrangement of the parts such as the water vapor treatment part, the waterproof cushion, the waterproof curtain and the like, the phenomenon that the cooling liquid overflows and spreads to the outside to influence the external industrial environment is avoided, and the adverse effect of the water vapor on the control of the cooling rate is eliminated.
Fourthly, the bearing part in the spraying process of the large metal component is set to be the steel frame vehicle, the steel frame vehicle can transfer the sample more quickly, the steel frame structure is more convenient for spraying different parts in the subsequent spraying heat treatment, and the cooling water is prevented from being accumulated on the platform to influence the cooling rate of different parts.
Drawings
FIG. 1 is a front view of a spray type heat treatment apparatus for large-sized metal members according to the present invention.
FIG. 2 is a perspective view of the spray type heat treatment apparatus for large metal components according to the present invention.
FIG. 3 is a schematic view of a steel frame vehicle of the spray type heat treatment apparatus for large-sized metal members according to the present invention.
FIG. 4 is a photograph of the metallographic structure of the surface layer according to the example of the present invention.
FIG. 5 is a photograph of the metallographic structure of the core of an embodiment of the present invention.
FIG. 6 is a photograph of the metallographic structure of the surface layer of a comparative example of the present invention.
FIG. 7 is a photograph of a metallographic structure of a core part of a comparative example of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention.
The spray type heat treatment device for the large metal component is used for regulating and controlling the cooling rate of the heat treatment of the large metal integral component in an industrial environment. It is worth noting that the cooling rate of the invention is mainly the cooling rate (5-30 ℃/s) which is difficult to control for large components between quenching and furnace cooling, furnace cooling can be directly adopted for the cooling rate less than 5 ℃/s, oil quenching can be directly carried out for the cooling rate between 30-100 ℃/s, and water quenching can be directly carried out for the cooling rate more than 100 ℃/s.
As shown in fig. 1-2, the spray type heat treatment apparatus for large metal members of the present invention comprises a main body, a spray part, and a control part.
Wherein, the body is a frame room which is enclosed by three flat plates and has a longitudinal section of 'Jiong'.
The spraying part 11 comprises a water inlet pipeline, a flow regulating mechanism 5 for controlling the flow of water flow and the opening time, a length regulating mechanism 6 and a spraying nozzle 7.
The control unit includes a temperature monitoring mechanism 4 and a flow rate control mechanism (not shown).
The water inlet pipeline is laid in the body; the water inlet 3 is convexly arranged on the outer wall of the body and is used for externally connecting cooling water; the water outlets are a plurality of and are uniformly and convexly arranged on the inner wall of the body, for example, 5 multiplied by 4 water outlets are arranged on the two side walls, and 4 multiplied by 4 water outlets are arranged on the top wall.
The flow regulating mechanism 5, the length regulating mechanism 6 and the spraying nozzles 7 are in one-to-one correspondence with the plurality of water outlets, one end of the flow regulating mechanism 5 is connected with the water outlets, and the other end of the flow regulating mechanism is connected with the spraying nozzles 7 through the length regulating mechanism 6.
The temperature monitoring mechanism 4 (for example, an infrared temperature monitoring system) is disposed on an inner wall of the body, and can monitor temperature changes of the component in real time.
The flow control mechanism is in communication connection with the flow adjustment mechanism 5 so that the control portion controls the flow adjustment mechanism to adjust the spraying flow rate and the spraying time of the cooling liquid.
Wherein, length adjustment mechanism 6 chooses for use the stereoplasm can stereotype the bamboo joint return bend, and 4 minutes (external diameter 20 mm) are chooseed for use to the specification, and its end-to-end connection sprays spout 7, can stereotype the bamboo joint return bend purpose easily regulate and control the regional and distance with the component of spraying, and then reach the coolant flow rate and the time of spraying of different regions of component and control and then reach the purpose of the whole cold speed homogeneity of control component.
The heat treatment device also comprises a steel frame vehicle (as shown in figure 3) which can be accommodated in the frame chamber and can move out of the frame chamber, so that after the large-scale component is taken out of the heat treatment furnace and is rapidly placed on the steel frame vehicle as shown in figure 3, the steel frame vehicle is provided with wheels for transferring the sample more quickly, and the steel frame structure is used for spraying different parts more conveniently in the subsequent spraying heat treatment and preventing cooling water from being accumulated on the platform to influence the cooling rate of the different parts of the sample.
The heat treatment device also comprises a water vapor treatment part arranged on the outer side wall of the body, and the water vapor treatment part comprises an air extractor 8 and a dryer; the dryer is arranged on the outer wall of the body, one end of the dryer is communicated with the inside of the body through a pipeline, and the other end of the dryer is communicated with the air pump 8 through a pipeline; a plurality of active silica gels 9 and ventilation fans 10 are arranged in the dryer in a staggered and spaced mode. In this way, the air exhauster 8 is used to ventilate the heat treatment apparatus, thereby eliminating the diffusion of water vapor to the external environment and affecting the industrial environment. The air extractor 8 extracts air and then feeds the air into the dryer, and the dryer is internally provided with a plurality of layers of active silica gel 9 and a ventilation fan 10 which are staggered at intervals, for example, after 3-stage full drying, the air is discharged into the external industrial environment.
The two ends of the frame chamber of the body are provided with openable waterproof curtains (not shown), so that after the steel frame vehicle and the large-scale component are placed into the spraying type heat treatment device, the two ends of the frame chamber are separated from the outside by the waterproof curtains, and water vapor is prevented from overflowing to the outside.
The bottom of body is provided with waterproof pad 1, prevents to spray the effect that the cooling water among the in-process can also play firm heat treatment device to the external world. Simultaneously, the bottom of body is provided with telescopic walking wheel 2 to be convenient for stretch out walking wheel 2 when not using in order to remove heat treatment device, and inside waterproof pad 1 with walking wheel 2 withdrawal when using, prevent that heat treatment device from using unnecessary removal, and prevent that walking wheel 2 from being soaked.
When the spray type heat treatment device for the large metal component is used for heat treatment, firstly, a target cooling rate is determined according to the material, the shape and the size of the large metal component and the target structure performance, and then, the spray flow rate and the spray time are set according to the target cooling rate and are input into the flow control mechanism; then, heating and insulating the large metal component; then, moving the heated and heat-insulated large-sized metal component out of the heat treatment furnace and then immediately moving the heated and heat-insulated large-sized metal component into a frame chamber of the heat treatment device, naturally cooling the large-sized metal component for 1-3 minutes after moving the heated and heat-insulated large-sized metal component into the frame chamber, and simultaneously adjusting a length adjusting mechanism 6 according to the shape and the size of the large-sized metal component and a spraying position so as to place a spraying nozzle 7 in a spraying station; and then, starting the flow regulating mechanism 5 through the flow control mechanism to perform spraying treatment according to the preset spraying flow rate and spraying time, monitoring the actual cooling rate of the large-sized metal component in real time through the temperature monitoring mechanism 4 and feeding the actual cooling rate back to the flow control mechanism, and adjusting the spraying flow rate and the spraying time in real time through controlling the flow regulating mechanism 5 according to the comparison result of the actual cooling rate and the target cooling rate by the flow control mechanism.
Specifically, the parameters of the spray heat treatment process for different metals can be selected as follows:
the components are classified according to the thickness of the cross section (the minimum distance in the cross section is set), the thickness of each component is 0-15 mm, 15-40 mm, 40-80 mm, 80-160 mm and more than 160mm, different spraying parts are selected for different types of areas to carry out spraying treatment at different flow rates and spraying time, and the spraying parts are mainly arranged on two surfaces forming the thickness (namely, the spraying area of the spraying part is a plane with the minimum distance in the cross section as a normal line, and two planes through which the normal line passes need to be sprayed, for example, a cuboid large-scale component is taken as an example, the spraying surface is two opposite surfaces with the largest area in six surfaces of the cuboid). The invention aims at the cooling process of which the cooling speed needs to be controlled to be 10-30 ℃/s, namely the air cooling process of the traditional heat treatment process. For the cooling rate of 5-30 ℃, after the sample is taken out of the heat treatment furnace, the sample needs to be subjected to air cooling treatment for 1-3 minutes in order to ensure that the cooling rate of the surface area of the sample meets the requirement and further obtain the required structure, and meanwhile, the air cooling time can be just used for arranging the spray nozzles 7 to be suitable for sprayingThe station (when being sprayed the face and being the component bottom, because steelframe vehicle bottom portion fretwork, consequently can adjust the bamboo joint return bend that can finalize the design to the component bottom and spray towards the bottom), to each component region of dividing according to the above, dispose a plurality of spray portion, spray portion quantity receives the regional size influence of classification, and the size is less than 200mm and disposes a spray portion, and every more disposes a spray portion of 200mm afterwards, and spray portion disposes in regional center, and spray 7 is apart from regional surface 200mm ~ 400 mm. And then starting the flow regulating mechanism 5 to carry out spraying heat treatment, wherein two-stage spraying is required to be carried out on the large-scale component sample, because the component is thick, the first-stage spraying is used for regulating and controlling the cooling rate of the outer layer of the component, and the second-stage spraying is used for regulating and controlling the cooling rate of the core layer of the component. The water flux in the first stage is about (100-300) × (100-300) mm 2 Can be calculated according to the following formula: q 1a =1500h 2 λ, where λ is the thermal conductivity of the material at 20 ℃ and h is the mean thickness of the cross-section of the component (m is chosen as the unit of calculation), in the case of TC4 titanium alloy, at 200X 200mm 2 Surface area coverage, when average cross-sectional thickness is 20mm (0.02 m), λ is about 15, Q 1a Selecting 0.04 liter/second; the first stage spray time can be calculated using the following equation: t is t 1a =20000 h/lambda, also taking TC4 titanium alloy as an example, when the average section thickness is 20mm, t 1a 27 seconds were selected. Subsequently, the flow rate is changed, and the second-stage flow rate is calculated according to the following formula: q 2a =100Q 1a h, taking TC4 titanium alloy as an example, Q when the average section thickness is 20mm 2a 0.08 liter/sec is selected, and for No. 45 steel, Q is obtained when the average section thickness is 100mm 2a 3 liters/second is selected. The second stage spray was continued for 5-10 minutes to ensure adequate cooling of the sample.
Example (b):
the method comprises the steps of carrying out two-phase region upper double-stage annealing heat treatment on a TC4 titanium alloy large-scale integral component manufactured by laser additive manufacturing, dividing the large-scale integral component into 5 regions according to the region thickness, wherein the average section thickness is respectively 10mm, 55mm, 38mm, 150mm and 60mm, carrying out 980 ℃ heat preservation on a sample for 2 hours, putting the sample on a steel frame vehicle, putting the sample and the sample into a spraying type heat treatment device together, arranging a spraying nozzle and spraying parameters, opening a spraying part for spraying and cooling, and meanwhile, taking the component out of a heat treatment furnace and carrying out air cooling for 2 minutes between the time of taking the component out of the heat treatment furnace and the time of spraying and cooling. The spraying and cooling parameters are respectively that air cooling is adopted in the region 1; the flow rate of the first stage of the area 2 is 0.3 liter/second, the spraying time is 73 seconds, and the flow rate of the second stage is 2.97 liters/second; the flow rate of the first stage of the area 3 is 0.14 liter/second, the spraying time is 51 seconds, and the flow rate of the second stage is 0.98 liter/second; zone 4 first stage flow 2.25 liters/second, spray time 200 seconds, second stage flow 33 liters/second. The flow rate of the first stage of the area 5 is 0.36 liter/second, the spraying time is 80 seconds, and the flow rate of the second stage is 2.16 liters/second. The second stage spraying time was 8 minutes. Then, the core and surface layer structures of the thickest cross section of the member are observed, and the surface layer and core structure are shown in fig. 4 and 5. It can be seen that the tissue difference is small and the tissue uniformity is good. The core part and the surface layer of the component are tested for mechanical properties, the tensile strength is 950MPa and 945MPa respectively, the elongation is 15 percent and 15.5 percent respectively, the difference is small, and the uniformity of the structure and the performance is good.
Comparative example:
the TC4 titanium alloy large-scale monolithic member manufactured by laser additive manufacturing in the same manner as in the example was subjected to two-phase region upper two-stage annealing heat treatment, the sample was subjected to heat preservation at 980 ℃ for 2 hours, and then directly subjected to air cooling, and then the structures of the core and the surface layer of the thickest cross section of the member were observed, and the structures of the surface layer and the core are shown in fig. 6 and 7. Tissue differences were found to be large. The core part and the surface layer of the component are tested for mechanical properties, the tensile strength is 930MPa and 960MPa respectively, the elongation is 15 percent and 9 percent respectively, and the difference between the properties and the structure is large.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The utility model provides a large-scale metal component fountain heat treatment device which characterized in that: the heat treatment device comprises a body, a spraying part and a control part;
the body is a frame chamber which is surrounded by three flat plates and has a longitudinal section in the shape of Jiong, and the bottom of the body is provided with a telescopic travelling wheel;
the spraying part comprises a water inlet pipeline, a flow regulating mechanism, a length regulating mechanism and a spraying nozzle;
the control part comprises a temperature monitoring mechanism and a flow control mechanism;
the water inlet pipeline is laid in the body; the water inlet is convexly arranged on the outer wall of the body; a plurality of water outlets are uniformly and convexly arranged on the inner wall of the body;
the flow regulating mechanism, the length regulating mechanism and the spraying nozzles correspond to the water outlets one by one, one end of the flow regulating mechanism is connected with the water outlets, and the other end of the flow regulating mechanism is connected with the spraying nozzles through the length regulating mechanism;
the temperature monitoring mechanism is arranged on the inner wall of the body to monitor the temperature change of the component in real time;
the flow control mechanism is in communication connection with the flow adjusting mechanism;
the heat treatment device also comprises a steel frame vehicle which can be accommodated in the frame chamber and can move out of the frame chamber, and the bottom of the steel frame vehicle is hollow;
the length adjusting mechanism is a shapeable bamboo joint bent pipe;
the heat treatment device also comprises a water vapor treatment part arranged on the outer side wall of the body.
2. The spray type heat treatment apparatus for large metal members according to claim 1, wherein: the water vapor treatment part comprises an air extractor and a dryer; one end of the dryer is communicated with the interior of the body through a pipeline, and the other end of the dryer is communicated with the air pump through a pipeline; a plurality of active silica gels and air exchange fans are arranged inside the dryer in a staggered and spaced mode.
3. The spray type heat treatment apparatus for large metal members according to claim 1, wherein: two ends of the frame chamber of the body are provided with openable and closable waterproof curtains.
4. The spray type heat treatment apparatus for large metal members according to claim 1, wherein: the bottom of body is provided with waterproof pad.
5. The method for heat treatment of a large-sized metal member by using the spray type heat treatment apparatus for a large-sized metal member according to any one of claims 1 to 4, comprising the steps of:
determining a target cooling rate according to the material, the shape and the size of the large metal component and the target organization performance, setting the spraying flow rate and the spraying time according to the target cooling rate, and inputting the spraying flow rate and the spraying time into the flow control mechanism;
moving the heated and heat-insulated large metal component out of the heat treatment furnace and then into the frame chamber, and then adjusting the length adjusting mechanism according to the shape and size of the large metal component to place the spraying nozzle in a spraying station;
and starting the flow regulating mechanism through the flow control mechanism to perform spraying treatment according to the set spraying flow rate and the set spraying time, monitoring the actual cooling rate of the large-sized metal component in real time through the temperature monitoring mechanism, and adjusting the spraying flow rate in real time through the flow control mechanism and the flow regulating mechanism according to the comparison result of the actual cooling rate and the target cooling rate.
6. The method of heat treatment according to claim 5, characterized in that: the spraying treatment is divided into two stages, and the spraying flow rate of the second stage is larger than that of the first stage.
7. The method of heat treatment according to claim 5, characterized in that: after the large metal component is moved into the frame chamber, the large metal component is naturally cooled for 1-3 minutes, and the length adjusting mechanism is adjusted according to the shape and the size of the large metal component and the spraying position so as to place the spraying nozzle in a spraying station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210542412.2A CN114635017B (en) | 2022-05-19 | 2022-05-19 | Spray type heat treatment device and heat treatment method for large metal component |
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| CN207760391U (en) * | 2017-11-27 | 2018-08-24 | 甘肃酒钢集团西部重工股份有限公司 | One kind covering quenching treatment device for Large Roller |
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Address after: No. 1205, 1f, building 12, neijian Middle Road, Xisanqi building materials City, Haidian District, Beijing 100096 Patentee after: Beijing Yuding Additive Manufacturing Research Institute Co.,Ltd. Address before: No. 1205, 1f, building 12, neijian Middle Road, Xisanqi building materials City, Haidian District, Beijing 100096 Patentee before: BEIJING YUDING ZENGCAI MANUFACTURE RESEARCH INSTITUTE Co.,Ltd. |