CN115433824A - Temperature measurement and control system and method for martensitic stainless steel heat treatment - Google Patents
Temperature measurement and control system and method for martensitic stainless steel heat treatment Download PDFInfo
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- CN115433824A CN115433824A CN202211400715.7A CN202211400715A CN115433824A CN 115433824 A CN115433824 A CN 115433824A CN 202211400715 A CN202211400715 A CN 202211400715A CN 115433824 A CN115433824 A CN 115433824A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 78
- 238000009529 body temperature measurement Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 26
- 229910001105 martensitic stainless steel Inorganic materials 0.000 title claims abstract description 25
- 238000012546 transfer Methods 0.000 claims abstract description 59
- 238000010791 quenching Methods 0.000 claims abstract description 25
- 230000000171 quenching effect Effects 0.000 claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 230000005856 abnormality Effects 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 18
- 230000003068 static effect Effects 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 6
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000004590 computer program Methods 0.000 claims description 3
- 239000012267 brine Substances 0.000 claims description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 229910001566 austenite Inorganic materials 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000005728 strengthening Methods 0.000 abstract description 3
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000004321 preservation Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
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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
- C21D11/00—Process control or regulation for heat treatments
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
-
- 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
- C21D2211/001—Austenite
-
- 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
- C21D2211/005—Ferrite
Abstract
The invention relates to a temperature measurement and control system and a temperature measurement and control method for martensitic stainless steel heat treatment, which belong to the technical field of temperature measurement and control and comprise a heat treater, a temperature detection device, a timing device, a workpiece transfer device, an abnormality alarm device and a control system; and the control system is respectively connected with the heat treater, the temperature detection device, the timing device, the workpiece transfer device and the abnormity alarm device. The austenite and ferrite dual-phase structure is obtained by accurately controlling the heat treatment temperature and adding one-time sub-temperature quenching after complete quenching, and the material strength and the impact toughness are simultaneously met by a strengthening and toughening process. The manufacturing quality of the pressure container is improved, and the service life is prolonged.
Description
Technical Field
The invention belongs to the technical field of temperature measurement and control, and particularly relates to a temperature measurement and control system and method for martensitic stainless steel heat treatment.
Background
The nuclear power Steam Generator (SG) is an important component of a nuclear power station pressure boundary which bears high temperature, high pressure and radioactive radiation, is used as a manufacturing material of internal parts of the SG, has extremely harsh working environment and high requirements on material performance, and ensures the reliable operation of the nuclear power station. The distance pull rod for the nuclear power station evaporator mainly has the function of fixing the distance between baffle plates, and the other important function of reducing the vibration of the tube bundle has high requirements on the strength and the toughness of materials. Generally, tensile property and impact toughness are opposite material properties, and in order to improve the tensile strength of the material, some impact toughness is sacrificed, and vice versa. However, for distance rods, both high tensile strength and high impact toughness must be ensured. The X12Cr13 material is European brand, and because the market consumption is small, the research on the material is less in China, the quenching and tempering heat treatment process is formulated according to the standard requirements at the present stage, and because the relevant temperature measurement and control are lacked, the test result is not ideal.
Therefore, at the present stage, a temperature measurement and control system, a temperature measurement and control method and a storage medium for martensitic stainless steel heat treatment need to be designed to solve the above problems.
Disclosure of Invention
The invention aims to provide a temperature measurement and control system, a temperature measurement and control method and a storage medium for martensitic stainless steel heat treatment, which are used for solving the technical problems in the prior art, are beneficial to improving the impact toughness of a material while not reducing the strength of the material, and obtain the product performance meeting the requirements and the like.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the temperature measurement and control system for martensitic stainless steel heat treatment comprises a heat treater, a temperature detection device, a timing device, a workpiece transfer device, an abnormality alarm device and a control system; the control system is respectively connected with the heat treater, the temperature detection device, the timing device, the workpiece transfer device and the abnormity alarm device;
the heat treatment device is used for carrying out set heat treatment on the workpiece;
the temperature detection device is used for detecting real-time temperature data of the workpiece in the heat treatment or cooling process;
the timing device is used for timing the workpiece in the heat treatment or cooling process;
the workpiece transfer device is used for transferring the workpiece in the heat treatment or cooling process;
and the abnormity alarm device gives an alarm when the real-time temperature data is abnormal.
Further, the control system controls the heat processor and the temperature detection device to be started;
when the real-time temperature data reaches 980 ℃, the control system controls the timing device to start timing, and the temperature of the heat treatment device for carrying out heat treatment on the workpiece does not exceed 1080 ℃;
when the timing device counts time for 2 hours, the control system controls the workpiece transfer device to be started, and the workpiece transfer device transfers workpieces out of the furnace in static air;
when the workpiece is cooled to room temperature, the workpiece transfer device transfers the workpiece into a furnace, when the real-time temperature data reaches 950 ℃, the control system controls the timing device to start timing, and the temperature of the heat processor for carrying out heat treatment on the workpiece is not more than 1000 ℃;
when the timing of the timing device reaches 1h, the control system controls the workpiece transfer device to be started, and the workpiece transfer device transfers the workpiece out of the furnace and puts the workpiece into quenching liquid;
when the workpiece is cooled to 100-300 ℃, the workpiece is transported into a furnace by the workpiece transport device, when the real-time temperature data reaches 850 ℃, the timing device is controlled by the control system to start timing, and the temperature for heat treatment of the workpiece by the heat treatment device is not more than 900 ℃;
when the timing of the timing device reaches 1h, the control system controls the workpiece transfer device to be started, and the workpiece transfer device transfers the workpiece out of the furnace and puts the workpiece into quenching liquid;
when the workpiece is cooled to 100-300 ℃, the workpiece transfer device transfers the workpiece into a furnace, when the real-time temperature data reaches 600 ℃, the control system controls the timing device to start timing, and the temperature of the heat processor for carrying out heat treatment on the workpiece is not more than 700 ℃;
when the timing device reaches 2h, the control system controls the workpiece transfer device to be started, and the workpiece transfer device transfers the workpiece out of the furnace in static air.
Furthermore, the transfer time from the discharging of the workpiece to the putting of the workpiece into the quenching liquid is less than 30 seconds.
Furthermore, the charging temperature of the workpiece is not more than 300 ℃, and the heating speed is 100 to 150 ℃/h.
Further, the cooling speed of the workpiece in the quenching liquid is 160-200 ℃/s.
Further, the quenching liquid is saline water with the mass fraction of 10% -15%.
Further, the temperature of the quenching liquid is not more than 40 ℃, otherwise, the control system controls the abnormity alarm device to alarm.
The temperature measurement and control method for the martensitic stainless steel heat treatment adopts the temperature measurement and control system for the martensitic stainless steel heat treatment to carry out temperature measurement and control.
A computer-readable storage medium having stored thereon a computer program which, when executed, performs the temperature measurement and control method of heat treatment of martensitic stainless steel as described above.
Compared with the prior art, the invention has the beneficial effects that:
one of the beneficial effects of the scheme is that the austenite and ferrite dual-phase structure is obtained by accurately controlling the heat treatment temperature and adding one sub-temperature quenching after complete quenching, and the material strength and the impact toughness are simultaneously met by the strengthening and toughening process. The manufacturing quality of the pressure container is improved, and the service life is prolonged.
Drawings
Fig. 1 is a schematic system structure diagram according to an embodiment of the present invention.
Fig. 2 is a schematic diagram showing the sequence of operations of the devices in the system according to the embodiment of the present invention.
Fig. 3 is a process diagram of the heat treatment according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the temperature measurement and control system for martensitic stainless steel heat treatment comprises a heat treater, a temperature detection device, a timing device, a workpiece transfer device, an abnormality alarm device and a control system; the control system is respectively connected with the heat processor, the temperature detection device, the timing device, the workpiece transfer device and the abnormity alarm device;
the heat treatment device is used for carrying out set heat treatment on the workpiece;
the temperature detection device is used for detecting real-time temperature data of the workpiece in the heat treatment or cooling process;
the timing device is used for timing the workpiece in the heat treatment or cooling process;
the workpiece transfer device is used for transferring the workpiece in the heat treatment or cooling process;
and the abnormity alarm device gives an alarm when the real-time temperature data is abnormal.
As shown in fig. 2 and 3, further, the control system controls the thermal processor and the temperature detection device to be turned on;
when the real-time temperature data reaches 980 ℃, the control system controls the timing device to start timing, and the temperature of the heat treatment device for carrying out heat treatment on the workpiece does not exceed 1080 ℃; namely the first heat treatment.
When the timing device counts time for 2 hours, the control system controls the workpiece transfer device to be started, and the workpiece transfer device transfers workpieces out of the furnace in static air;
when the workpiece is cooled to room temperature, the workpiece transfer device transfers the workpiece into a furnace, when the real-time temperature data reaches 950 ℃, the control system controls the timing device to start timing, and at the moment, the temperature of the heat processor for carrying out heat treatment on the workpiece is not more than 1000 ℃; namely the second heat treatment.
When the timing of the timing device reaches 1h, the control system controls the workpiece transfer device to be started, and the workpiece transfer device transfers the workpiece out of the furnace and puts the workpiece into quenching liquid;
when the workpiece is cooled to 100-300 ℃, the workpiece is transported into a furnace by the workpiece transport device, when the real-time temperature data reaches 850 ℃, the timing device is controlled by the control system to start timing, and the temperature for heat treatment of the workpiece by the heat treatment device is not more than 900 ℃; namely the third heat treatment.
When the timing of the timing device reaches 1h, the control system controls the workpiece transfer device to be started, and the workpiece transfer device transfers the workpiece out of the furnace and puts the workpiece into quenching liquid;
when the workpiece is cooled to 100-300 ℃, the workpiece is transported into a furnace by the workpiece transport device, when the real-time temperature data reaches 600 ℃, the timing device is controlled by the control system to start timing, and the temperature for heat treatment of the workpiece by the heat treatment device is not more than 700 ℃; namely the fourth heat treatment.
When the timing device reaches 2h, the control system controls the workpiece transfer device to be started, and the workpiece transfer device transfers the workpiece out of the furnace in static air.
In the scheme, the austenite and ferrite dual-phase structure is obtained by accurately controlling the heat treatment temperature and adding one-time sub-temperature quenching after complete quenching, and the material strength and the impact toughness are simultaneously met by a strengthening and toughening process. The manufacturing quality of the pressure container is improved, and the service life is prolonged.
Furthermore, the transfer time from the discharging of the workpiece to the putting of the workpiece into the quenching liquid is less than 30 seconds.
Furthermore, the charging temperature of the workpiece is not more than 300 ℃, and the heating speed is 100 to 150 ℃/h.
Further, the cooling speed of the workpiece in the quenching liquid is 160-200 ℃/s.
Further, the quenching liquid is 10% -15% of brine in mass fraction.
Further, the temperature of the quenching liquid is not more than 40 ℃, otherwise, the control system controls the abnormity alarm device to alarm.
The present invention will be described in detail with reference to examples.
Carrying out initial heat treatment on the X12Cr13 martensitic stainless steel distance pull rod, heating the workpiece to 990 ℃ along with the furnace at the heating speed of 140 ℃/h, carrying out heat preservation for not less than 2h, taking out the workpiece from the furnace after the heat preservation is finished, and placing the workpiece in static air for cooling; cooling to room temperature, then putting into the furnace again, heating to 980 ℃ at the same heating speed for heat preservation for 1h, taking out from the furnace after finishing heat preservation, quickly cooling by water, and continuously moving the workpiece in the water to quickly reduce the temperature of the workpiece to improve the hardenability of the material, wherein the shorter the time from taking out from the furnace to putting into the water is, the better the time is; cooling the workpiece to below 200 ℃, taking out the workpiece from the water, then putting the workpiece into the furnace for the third time, heating the workpiece to 870 ℃ at the same temperature raising speed, preserving heat for 1h, quickly taking out the workpiece from the furnace after finishing preserving heat, and quickly cooling the workpiece by water, wherein the requirements are the same as the above; and (3) cooling the workpiece to below 200 ℃, taking out the workpiece from the water, feeding the workpiece into the furnace for the fourth time, heating the workpiece to 610 ℃ at the same temperature raising speed as the previous step, preserving the heat for 2 hours, taking out the workpiece after the heat preservation is finished, and cooling the workpiece by air. The properties of the material obtained in this example are shown in table 1.
TABLE 1 X12Cr13 test values of mechanical properties of distance rods
The temperature measurement and control method for the martensitic stainless steel heat treatment adopts the temperature measurement and control system for the martensitic stainless steel heat treatment to carry out temperature measurement and control.
A computer-readable storage medium having stored thereon a computer program which, when executed, performs the temperature measurement and control method of martensitic stainless steel heat treatment as described above.
The above are preferred embodiments of the present invention, and all changes made according to the technical solutions of the present invention that produce functional effects do not exceed the scope of the technical solutions of the present invention belong to the protection scope of the present invention.
Claims (9)
1. The temperature measurement and control system for martensitic stainless steel heat treatment is characterized by comprising a heat treater, a temperature detection device, a timing device, a workpiece transfer device, an abnormality alarm device and a control system; the control system is respectively connected with the heat processor, the temperature detection device, the timing device, the workpiece transfer device and the abnormity alarm device;
the heat treatment device is used for carrying out set heat treatment on the workpiece;
the temperature detection device is used for detecting real-time temperature data of the workpiece in the heat treatment or cooling process;
the timing device is used for timing the workpiece in the heat treatment or cooling process;
the workpiece transfer device is used for transferring the workpiece in the heat treatment or cooling process;
and the abnormity alarm device gives an alarm when the real-time temperature data is abnormal.
2. The temperature measurement and control system for martensitic stainless steel heat treatment according to claim 1, wherein the control system controls the heat treatment device and the temperature detection device to be turned on;
when the real-time temperature data reach 980 ℃, the control system controls the timing device to start timing, and the temperature of the heat treatment device for carrying out heat treatment on the workpiece does not exceed 1080 ℃;
when the timing device counts time for 2 hours, the control system controls the workpiece transfer device to be started, and the workpiece transfer device transfers workpieces out of the furnace in static air;
when the workpiece is cooled to room temperature, the workpiece transfer device transfers the workpiece into a furnace, when the real-time temperature data reaches 950 ℃, the control system controls the timing device to start timing, and the temperature of the heat processor for carrying out heat treatment on the workpiece is not more than 1000 ℃;
when the timing of the timing device reaches 1h, the control system controls the workpiece transfer device to be started, and the workpiece transfer device transfers the workpiece out of the furnace and puts the workpiece into quenching liquid;
when the workpiece is cooled to 100-300 ℃, the workpiece is transported into a furnace by the workpiece transport device, when the real-time temperature data reaches 850 ℃, the timing device is controlled by the control system to start timing, and the temperature for heat treatment of the workpiece by the heat treatment device is not more than 900 ℃;
when the timing of the timing device reaches 1h, the control system controls the workpiece transfer device to be started, and the workpiece transfer device transfers the workpiece out of the furnace and puts the workpiece into quenching liquid;
when the workpiece is cooled to 100-300 ℃, the workpiece transfer device transfers the workpiece into a furnace, when the real-time temperature data reaches 600 ℃, the control system controls the timing device to start timing, and the temperature of the heat processor for carrying out heat treatment on the workpiece is not more than 700 ℃;
when the timing device reaches 2h, the control system controls the workpiece transfer device to be started, and the workpiece transfer device transfers the workpiece out of the furnace in static air.
3. The temperature measurement and control system for heat treatment of martensitic stainless steel according to claim 2, wherein the transit time of the workpiece from the furnace exit to the quenching liquid entry is less than 30 seconds.
4. The temperature measurement and control system for martensitic stainless steel heat treatment according to claim 2, wherein the charging temperature of the workpiece is not more than 300 ℃, and the heating speed is 100-150 ℃/h.
5. The temperature measurement and control system for the heat treatment of the martensitic stainless steel as claimed in claim 2, wherein the cooling speed of the workpiece in the quenching liquid is 160-200 ℃/s.
6. The temperature measurement and control system for the heat treatment of the martensitic stainless steel as claimed in claim 2, wherein the quenching liquid is 10-15% by mass of brine.
7. The temperature measurement and control system for martensitic stainless steel heat treatment according to claim 2, wherein the temperature of the quenching liquid is not more than 40 ℃, otherwise, the control system controls the abnormality alarm device to give an alarm.
8. The temperature measurement and control method for martensitic stainless steel heat treatment is characterized in that the temperature measurement and control system for martensitic stainless steel heat treatment according to any one of claims 1-7 is adopted for temperature measurement and control.
9. A computer-readable storage medium, characterized in that the storage medium has stored thereon a computer program which, when executed, performs the temperature measurement and control method for the heat treatment of martensitic stainless steel according to claim 8.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115993153A (en) * | 2023-03-24 | 2023-04-21 | 江苏新恒基特种装备股份有限公司 | Stainless steel heat treatment standard monitoring system and method based on image recognition |
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| CN115993153A (en) * | 2023-03-24 | 2023-04-21 | 江苏新恒基特种装备股份有限公司 | Stainless steel heat treatment standard monitoring system and method based on image recognition |
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Application publication date: 20221206 |