CN108520167B - Method and system for rapidly evaluating high-temperature life of G102 steel heating surface - Google Patents
Method and system for rapidly evaluating high-temperature life of G102 steel heating surface Download PDFInfo
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Abstract
The method and the system for rapidly evaluating the high-temperature service life can rapidly evaluate the high-temperature service life of the G102 steel heating surface in a short time, and particularly, correlation between normal-temperature physicochemical data and high-temperature creep rupture work and high-temperature creep data is established according to a normal-temperature physicochemical characteristic data range, so that characteristic data can be matched in a correlation database before the heating surface is evaluated, and once the data is successfully matched, high-temperature creep performance tests of metal materials can be reduced. Taking each high-temperature performance test as an example, each test needs 15 high-temperature samples, the average cost of each sample is about 0.5 ten thousand yuan, the cost is saved by about 8 ten thousand yuan, and the economic benefit is obvious. More importantly, the time of the whole process is shortened from about 3000 hours to about 140 hours, and the evaluation efficiency is greatly improved.
Description
Technical Field
The application relates to the technical field of electric power, in particular to a method and a system for rapidly evaluating the high-temperature service life of a G102 steel heating surface.
Background
The failure of parts caused by creep damage of four hot surfaces of a power plant boiler, an economizer, a water wall, a superheater and a reheater in long-term service is one of important reasons for causing the unplanned shutdown of the power plant boiler. Although a large amount of capital is invested in the power plant to reform the heating surface, the non-stop accident of tube explosion caused by material creep damage still occurs.
The G102 steel is a multi-element low-alloy heat-resistant steel, and the unit using the steel grade in the 200MW unit manufactured in late 1990 accounts for over 86% of the unit in the country. Over time, the cases of long creep failure of G102 steel due to high temperatures have increased year by year. However, if the damage condition of the heating surface of the G102 steel before the next overhaul period can be correctly predicted during the overhaul period of the boiler, the occurrence of pipe explosion non-stop accidents during the period can be effectively prevented.
The traditional heating surface state evaluation method needs to perform a high-temperature performance test, the time consumption is more than half a year, the unit delay operation is caused, and high-temperature data are basically not used after the state evaluation is finished. And the G102 steel belongs to multi-element reinforced heat-resistant steel (the reinforced elements are Cr, Mo, V, W, Ti and B), the aging damage mechanism is more complex, and the corresponding relation of normal temperature data and high temperature data does not have universal applicability. Therefore, it is necessary to conduct research on the correlation between the normal temperature data and the high temperature data of the G102 steel, so as to be able to quickly query the corresponding high temperature data through the normal temperature data, thereby improving the timeliness of the state evaluation of the heating surface of the G102 steel.
Disclosure of Invention
In view of this, the present application provides a method and a system for rapidly evaluating the high-temperature life of a G102 steel heating surface, which are used for determining the high-temperature data of the G102 steel heating surface according to corresponding normal-temperature data, so that the high-temperature life of the G102 steel heating surface can be rapidly evaluated.
In order to achieve the above object, the following solutions are proposed:
a method for rapidly evaluating the high-temperature service life of a G102 steel heating surface specifically comprises the following steps:
analyzing and summarizing a large amount of normal-temperature physicochemical data and high-temperature performance data accumulated in long-term heating surface evaluation work according to a high-temperature creep damage mechanism, determining a normal-temperature physicochemical characteristic data range associated with the high-temperature performance data, and finally determining high-temperature creep data associated with the normal-temperature physicochemical characteristic data range by combining with test verification;
carrying out a high-temperature creep rupture work test on the high-temperature creep sample again by using a small sample creep testing machine to obtain a high-temperature creep rupture work standard range, and obtaining a normal-temperature physicochemical characteristic data standard range according to the high-temperature creep rupture work standard range and the normal-temperature physicochemical characteristic data range;
establishing a correlation database for the standard range of the normal-temperature physicochemical characteristic data, the high-temperature creep rupture work and the high-temperature creep data;
carrying out normal-temperature physicochemical inspection and high-temperature creep test on a heating surface of G102 steel to be evaluated to obtain actual normal-temperature physicochemical characteristic parameter data and actual high-temperature creep rupture work of the heating surface of the G102 steel to be evaluated, and judging whether the actual normal-temperature physicochemical characteristic parameter data and the actual high-temperature creep rupture work respectively accord with a normal-temperature physicochemical characteristic data standard range and a high-temperature rupture work standard range;
and if the actual normal-temperature physicochemical characteristic parameter data accord with the normal-temperature physicochemical characteristic data standard range, and the actual high-temperature creep rupture work load is in the high-temperature creep rupture work standard range, searching target high-temperature creep data corresponding to the high-temperature creep rupture work range in the association database according to the actual normal-temperature physicochemical characteristic parameter, and evaluating the heating surface of the G102 steel to be evaluated by utilizing the target high-temperature creep data and adopting an isotherm extrapolation method to obtain the high-temperature service life of the heating surface of the G102 steel to be evaluated.
Optionally, the normal-temperature physicochemical characteristic data includes part or all of chemical composition data, metallographic characteristic data, carbide size data and mechanical property data.
Optionally, the normal-temperature physical and chemical characteristic data range is as follows:
the chemical composition of the heating surface of the G102 steel to be evaluated conforms to the alloy composition range in GB 5310;
the metallographic structure of the heating surface of the G102 steel to be evaluated is that carbide particles are precipitated on crystal grains and crystal boundaries, the crystal boundaries are provided with long chain-shaped carbides, the average size of the carbides is 3.0-4.0 mu m, and the grain size is 4-5 grade;
the mechanical property of the heating surface of the G102 steel to be evaluated is 541-567 MPa.
Optionally, the high temperature work to failure of the high temperature creep test specimen is between 10.7J and 12.3J.
A quick evaluation system for the high-temperature service life of a G102 steel heating surface specifically comprises:
the data statistics module is used for analyzing and summarizing a large amount of normal-temperature physicochemical data and high-temperature performance data accumulated in long-term heating surface evaluation work according to a high-temperature creep damage mechanism, determining a normal-temperature physicochemical characteristic data range associated with the high-temperature performance data, and finally determining high-temperature creep data associated with the normal-temperature physicochemical characteristic data range by combining with test verification;
the first test control module is used for carrying out a high-temperature creep rupture work test on the high-temperature creep sample again by adopting a small sample creep testing machine to obtain a high-temperature creep rupture work standard range, and obtaining a normal-temperature physicochemical characteristic data standard range according to the high-temperature creep rupture work standard range and the normal-temperature physicochemical characteristic data range;
the data association module is used for establishing an association database by utilizing the normal-temperature physicochemical characteristic data standard range, the high-temperature creep rupture work and the high-temperature creep data;
the second test control module is used for carrying out normal-temperature physicochemical inspection and high-temperature creep test on the heating surface of the G102 steel to be evaluated, obtaining actual normal-temperature physicochemical characteristic parameter data and actual high-temperature creep rupture work of the heating surface of the G102 steel to be evaluated, and judging whether the actual normal-temperature physicochemical characteristic parameter data and the actual high-temperature creep rupture work respectively meet the normal-temperature physicochemical characteristic data standard range and the high-temperature rupture work standard range;
and the evaluation execution module is used for searching target high-temperature creep data corresponding to the high-temperature creep rupture work range in the association database according to the actual normal-temperature physicochemical characteristic parameters if the actual normal-temperature physicochemical characteristic parameter data accord with the normal-temperature physicochemical characteristic data standard range and the actual high-temperature creep rupture work load meets the high-temperature rupture work standard range, evaluating the heating surface of the G102 steel to be evaluated by utilizing the target high-temperature creep data and adopting an isothermal line extrapolation method, and obtaining the high-temperature service life of the heating surface of the G102 steel to be evaluated.
Optionally, the normal-temperature physicochemical characteristic data includes part or all of chemical composition data, metallographic characteristic data, carbide size data and mechanical property data.
Optionally, the normal-temperature physical and chemical characteristic data range is as follows:
the chemical composition of the heating surface of the G102 steel to be evaluated conforms to the alloy composition range in GB 5310;
the metallographic structure of the heating surface of the G102 steel to be evaluated is that carbide particles are precipitated on crystal grains and crystal boundaries, the crystal boundaries are provided with long chain-shaped carbides, the average size of the carbides is 3.0-4.0 mu m, and the grain size is 4-5 grade;
the mechanical property of the heating surface of the G102 steel to be evaluated is 541-567 MPa.
Optionally, the high temperature work to failure of the high temperature creep test specimen is between 10.7J and 12.3J.
According to the technical scheme, the method and the system for rapidly evaluating the high-temperature service life can rapidly evaluate the high-temperature service life of the heating surface of the G102 steel in a short time, and particularly, correlation between normal-temperature physicochemical data and high-temperature creep rupture work and high-temperature creep data is established according to a normal-temperature physicochemical characteristic data range, so that characteristic data can be matched in a correlation database before the heating surface is evaluated, and once the data is matched successfully, a high-temperature creep performance test of a metal material can be reduced. Taking each high-temperature performance test as an example, each test needs 15 high-temperature samples, the average cost of each sample is about 0.5 ten thousand yuan, the cost is saved by about 8 ten thousand yuan, and the economic benefit is obvious. More importantly, the time of the whole process is shortened from about 3000 hours to about 140 hours, and the evaluation efficiency is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flowchart illustrating steps of a method for rapidly evaluating a high-temperature life of a heating surface of G102 steel according to an embodiment of the present application;
FIG. 2 is a high temperature creep curve of a high temperature creep test specimen provided in an embodiment of the present application;
fig. 3 is a structural block of a rapid high-temperature life evaluation system for a G102 steel heating surface according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example one
Fig. 1 is a flowchart of steps of a method for rapidly evaluating a high-temperature life of a G102 steel heating surface according to an embodiment of the present application.
As shown in fig. 1, the method for rapidly evaluating a high temperature lifetime provided in this embodiment specifically includes the following steps:
s101: and determining the normal-temperature physical and chemical characteristic data range of the G102 steel heating surface and high-temperature creep data corresponding to the normal-temperature physical and chemical characteristic data range.
Specifically, according to a high-temperature creep damage mechanism, a large amount of normal-temperature physicochemical data and high-temperature performance data accumulated in the evaluation work of a heating surface for a long time are analyzed and summarized, a normal-temperature physicochemical characteristic data range associated with the high-temperature performance data is determined, and the high-temperature creep data associated with the normal-temperature physicochemical characteristic data range is finally determined by combining with experimental verification.
The physical and chemical characteristic data comprises chemical component data, metallographic characteristic data, carbide size data and mechanical property data, or only part of the data is adopted.
S102: and (3) performing a high-temperature creep rupture work test on the high-temperature creep sample to obtain a normal-temperature physicochemical characteristic data standard range.
With the extension of the operation time of the power station boiler, the structure of the heating surface of the G102 steel is further aged, the normal-temperature mechanical property is gradually reduced, and the high-temperature creep property of the G102 steel is changed, so that 3 groups of samples are selected for researching the normal-temperature property and the high-temperature creep property of the aged 4-grade steel pipe of the G102 steel, and 3 samples (9 samples in total) in each group are tested under different stress levels. The basic situation is shown in Table 1.
TABLE 1 basic conditions of the heated surface
According to GB/T14203-1993 general Law of Steel and alloy photoelectronic emission Spectroscopy, chemical composition analysis is carried out on the G102 steel heating surface, the result is shown in Table 2, and the chemical compositions of the analyzed sample all meet the quality standard related to materials.
TABLE 2 analysis results of chemical composition of samples on heated surface
According to GB/T13298-1991 metallographic microstructure inspection method and DL/T733-2001 12CrlMoV spheroidization grading standard for thermal power plants, metallographic grading is carried out on the heating surface, and the result is shown in Table 3.
TABLE 3 metallographic analysis of samples from the heated surface
According to GB/T228.1-2010 metallic Material tensile test first part: room temperature test method, the mechanical properties of the heated surface were tested, the test results are shown in table 4, and the results are all in accordance with the quality standards related to the material.
TABLE 4 analysis of mechanical Properties of samples on heated surface
In conclusion, the chemical compositions of the samples meet the requirements of relevant standards, no obvious difference is seen, the bainite aging grade is grade 4, the mechanical properties are reduced along with the increase of the aging grade, but the mechanical properties do not exceed the requirements of the standards, and the overall difference is not obvious.
TABLE 5 analysis results of creep impact power at 600 ℃ of samples on heated surfaces
| Sample number | Creep impact work |
| 1-1 | 11.2 |
| 1-2 | 10.9 |
| 1-3 | 10.7 |
| 2-1 | 11.9 |
| 2-2 | 12.3 |
| 2-3 | 11.7 |
| 3-1 | 10.9 |
| 3-2 | 11.2 |
| 3-3 | 11.6 |
The above 9 groups of samples were subjected to a 600 ℃ constant temperature uniaxial creep test under test stresses of 180MPa, 170MPa, and 160 MPa. The creep test of the 3 pipes is shown in FIG. 2, using 170MPa as an example. It can be seen that the test specimens have a similar tendency to change in the second phase of the high temperature creep curve. According to the classical high-temperature creep theory, the second-stage high-temperature creep curve determines the aging life of the final heating surface.
According to the test result, the chemical composition meets the alloy composition range in GB 5310; the metallographic structure is crystal grains and carbide particles precipitated on crystal boundaries, the crystal boundaries are provided with grown chain-like carbides, the average size of the carbides is 3.0-4.0 mu m, and the grain size is 4-5 grade; the mechanical property is 541-567MPa, and the high-temperature creep rupture work of the small sample is 10.7J-12.3J.
S103: and establishing a correlation database for the standard range of the normal-temperature physicochemical characteristic data and the high-temperature creep rupture work and high-temperature creep data.
And establishing a correlation database of the normal-temperature physicochemical characteristic parameter standard range and the high-temperature creep data as the characteristic parameters for the high-temperature evaluation of the G102 steel, and detecting the normal-temperature physicochemical characteristic parameters of the standard to be evaluated, as shown in Table 5.
TABLE 5 physicochemical characteristic parameters of G102 steels to be evaluated at 4-grade aging
| Chemical composition | Metallographic phase | Grain size | Carbide particles | Mechanical properties | Creep impact work |
| Qualified | Chain-like carbide | 4 | 3.5μm | 545MPa | 11.7 |
S104: judging whether the actual normal-temperature physicochemical characteristic parameter data and the actual high-temperature creep rupture work respectively meet the normal-temperature physicochemical characteristic data standard range and the high-temperature rupture work standard range;
compared with the standard range of physicochemical characteristic parameters in the associated database, the evaluation method meets the requirements of chemical components, metallographic characteristics, carbide size and mechanical properties, so that the to-be-evaluated part can be matched with data in the associated database to obtain high-temperature creep data, and then the heating surface evaluation is carried out by adopting a state evaluation technology based on creep damage mechanics.
S105: and evaluating the G102 steel heating surface to be evaluated by utilizing the target high-temperature creep data.
If the actual normal-temperature physicochemical characteristic parameter data conforms to the normal-temperature physicochemical characteristic data standard range and the actual high-temperature creep rupture power load high-temperature rupture power standard range, searching target high-temperature creep data corresponding to the high-temperature creep rupture power range in the association database according to the actual normal-temperature physicochemical characteristic parameter, and evaluating the heating surface of the G102 steel to be evaluated by using the target high-temperature creep data and adopting an isothermal line extrapolation method to obtain the high-temperature service life of the heating surface of the G102 steel to be evaluated;
it can be seen from the above technical solutions that the method and system for rapidly evaluating the high-temperature life provided by this embodiment can rapidly evaluate the high-temperature life of the G102 steel heating surface in a short time, and specifically, according to the range of normal-temperature physicochemical characteristic data, the method and system establish the correlation between the normal-temperature physicochemical data and the high-temperature creep rupture work and high-temperature creep data, which means that before the heating surface evaluation, the characteristic data can be matched in the correlation database, and once the matching data is successful, the high-temperature creep performance test of the metal material can be reduced. Taking each high-temperature performance test as an example, each test needs 15 high-temperature samples, the average cost of each sample is about 0.5 ten thousand yuan, the cost is saved by about 8 ten thousand yuan, and the economic benefit is obvious. More importantly, the time of the whole process is shortened from about 3000 hours to about 140 hours, and the evaluation efficiency is greatly improved.
Example two
Fig. 3 is a structural block diagram of a rapid high-temperature life evaluation system for a G102 steel heating surface according to an embodiment of the present application.
As shown in fig. 3, the system for rapidly evaluating a high temperature life provided by this embodiment specifically includes a data statistics module 10, a first test control module 20, a data association module 30, a second test control module 40, and an evaluation execution module 50.
The data statistics module is used for determining the normal-temperature physicochemical characteristic data range of the G102 steel heating surface and the corresponding high-temperature creep data.
Specifically, according to a high-temperature creep damage mechanism, a large amount of normal-temperature physicochemical data and high-temperature performance data accumulated in the evaluation work of a heating surface for a long time are analyzed and summarized, a normal-temperature physicochemical characteristic data range associated with the high-temperature performance data is determined, and the high-temperature creep data associated with the normal-temperature physicochemical characteristic data range is finally determined by combining with experimental verification.
The physical and chemical characteristic data comprises chemical component data, metallographic characteristic data, carbide size data and mechanical property data, or only part of the data is adopted.
The first test control module is used for testing high-temperature creep rupture work of the high-temperature creep sample to obtain a normal-temperature physicochemical characteristic data standard range.
With the extension of the operation time of the power station boiler, the structure of the heating surface of the G102 steel is further aged, the normal-temperature mechanical property is gradually reduced, and the high-temperature creep property of the G102 steel is changed, so that 3 groups of samples are selected for researching the normal-temperature property and the high-temperature creep property of the aged 4-grade steel pipe of the G102 steel, and 3 samples (9 samples in total) in each group are tested under different stress levels. The basic situation is shown in Table 1.
TABLE 1 basic conditions of the heated surface
According to GB/T14203-1993 general Law of Steel and alloy photoelectronic emission Spectroscopy, chemical composition analysis is carried out on the G102 steel heating surface, the result is shown in Table 2, and the chemical compositions of the analyzed sample all meet the quality standard related to materials.
TABLE 2 analysis results of chemical composition of samples on heated surface
According to GB/T13298-1991 metallographic microstructure inspection method and DL/T733-2001 12CrlMoV spheroidization grading standard for thermal power plants, metallographic grading is carried out on the heating surface, and the result is shown in Table 3.
TABLE 3 metallographic analysis of samples from the heated surface
According to GB/T228.1-2010 metallic Material tensile test first part: room temperature test method, the mechanical properties of the heated surface were tested, the test results are shown in table 4, and the results are all in accordance with the quality standards related to the material.
TABLE 4 analysis of mechanical Properties of samples on heated surface
| Sample number | Yield strength Re (MPa) | Tensile Strength Rm (MPa) | Elongation after Break A (%) |
| 1-1 | - | 541 | 23 |
| 1-2 | - | 553 | 23 |
| 1-3 | - | 555 | 21 |
| 2-1 | - | 567 | 20 |
| 2-2 | - | 560 | 19 |
| 2-3 | - | 559 | 20 |
| 3-1 | - | 549 | 22 |
| 3-2 | 543 | 21 | |
| 3-3 | - | 550 | 21 |
In conclusion, the chemical compositions of the samples meet the requirements of relevant standards, no obvious difference is seen, the bainite aging grade is grade 4, the mechanical properties are reduced along with the increase of the aging grade, but the mechanical properties do not exceed the requirements of the standards, and the overall difference is not obvious.
TABLE 5 analysis results of creep impact power at 600 ℃ of samples on heated surfaces
| Sample number | Creep impact work |
| 1-1 | 11.2 |
| 1-2 | 10.9 |
| 1-3 | 10.7 |
| 2-1 | 11.9 |
| 2-2 | 12.3 |
| 2-3 | 11.7 |
| 3-1 | 10.9 |
| 3-2 | 11.2 |
| 3-3 | 11.6 |
The above 9 groups of samples were subjected to a 600 ℃ constant temperature uniaxial creep test under test stresses of 180MPa, 170MPa, and 160 MPa. The creep test of the 3 pipes is shown in FIG. 2, using 170MPa as an example. It can be seen that the test specimens have a similar tendency to change in the second phase of the high temperature creep curve. According to the classical high-temperature creep theory, the second-stage high-temperature creep curve determines the aging life of the final heating surface.
According to the test result, the chemical composition meets the alloy composition range in GB 5310; the metallographic structure is crystal grains and carbide particles precipitated on crystal boundaries, the crystal boundaries are provided with grown chain-like carbides, the average size of the carbides is 3.0-4.0 mu m, and the grain size is 4-5 grade; the mechanical property is 541-567MPa, and the high-temperature creep rupture work of the small sample is 10.7J-12.3J.
And the data association module is used for establishing an association database for the normal-temperature physicochemical characteristic data standard range and the high-temperature creep rupture work and high-temperature creep data.
And establishing a correlation database of the normal-temperature physicochemical characteristic parameter standard range and the high-temperature creep data as the characteristic parameters for the high-temperature evaluation of the G102 steel, and detecting the normal-temperature physicochemical characteristic parameters of the standard to be evaluated, as shown in Table 5.
TABLE 5 physicochemical characteristic parameters of G102 steels to be evaluated at 4-grade aging
| Chemical composition | Metallographic phase | Grain size | Carbide particles | Mechanical properties | Creep impact work |
| Qualified | Chain-like carbide | 4 | 3.5μm | 545MPa | 11.7 |
The second test control module is used for judging whether the actual normal-temperature physicochemical characteristic parameter data and the actual high-temperature creep rupture work respectively meet the normal-temperature physicochemical characteristic data standard range and the high-temperature rupture work standard range;
compared with the standard range of physicochemical characteristic parameters in the associated database, the evaluation method meets the requirements of chemical components, metallographic characteristics, carbide size and mechanical properties, so that the to-be-evaluated part can be matched with data in the associated database to obtain high-temperature creep data, and then the heating surface evaluation is carried out by adopting a state evaluation technology based on creep damage mechanics.
And the evaluation execution module is used for evaluating the G102 steel heating surface to be evaluated by utilizing the target high-temperature creep data.
If the actual normal-temperature physicochemical characteristic parameter data conforms to the normal-temperature physicochemical characteristic data standard range and the actual high-temperature creep rupture power load high-temperature rupture power standard range, searching target high-temperature creep data corresponding to the high-temperature creep rupture power range in the association database according to the actual normal-temperature physicochemical characteristic parameter, and evaluating the heating surface of the G102 steel to be evaluated by using the target high-temperature creep data and adopting an isothermal line extrapolation method to obtain the high-temperature service life of the heating surface of the G102 steel to be evaluated;
it can be seen from the above technical solutions that the rapid high-temperature life evaluation system provided in this embodiment can rapidly evaluate the high-temperature life of the G102 steel heating surface in a short time, and specifically, according to the provided normal-temperature physicochemical characteristic data range, the correlation between the normal-temperature physicochemical data and the high-temperature creep rupture work and the high-temperature creep data is established, which means that before the heating surface evaluation, the characteristic data can be matched in the correlation database, and once the matching data is successful, the high-temperature creep performance test of the metal material can be reduced. Taking each high-temperature performance test as an example, each test needs 15 high-temperature samples, the average cost of each sample is about 0.5 ten thousand yuan, the cost is saved by about 8 ten thousand yuan, and the economic benefit is obvious. More importantly, the time of the whole process is shortened from about 3000 hours to about 140 hours, and the evaluation efficiency is greatly improved.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one of skill in the art, embodiments of the present application may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the true scope of the embodiments of the application.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The technical solutions provided by the present application are introduced in detail, and specific examples are applied in the description to explain the principles and embodiments of the present application, and the descriptions of the above examples are only used to help understanding the method and the core ideas of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (2)
1. A method for rapidly evaluating the high-temperature service life of a G102 steel heating surface is characterized by comprising the following steps:
analyzing and summarizing a large amount of normal-temperature physical and chemical characteristic data and high-temperature performance data accumulated in long-term heating surface evaluation work according to a high-temperature creep damage mechanism, determining a normal-temperature physical and chemical characteristic data range associated with the high-temperature performance data, and finally determining high-temperature creep data associated with the normal-temperature physical and chemical characteristic data range by combining test verification, wherein the normal-temperature physical and chemical characteristic data comprises part or all of chemical composition data, metallographic characteristic data, carbide size data and mechanical performance data;
carrying out a high-temperature creep rupture work test on a high-temperature creep sample again by adopting a small sample creep testing machine to obtain a high-temperature creep rupture work standard range, and obtaining a normal-temperature physicochemical characteristic data standard range according to the high-temperature creep rupture work standard range and the normal-temperature physicochemical characteristic data range, wherein the normal-temperature physicochemical characteristic data range is as follows: the chemical composition of the heating surface of the G102 steel to be evaluated conforms to the alloy composition range in GB 5310; the metallographic structure of the heating surface of the G102 steel to be evaluated is that carbide particles are precipitated on crystal grains and crystal boundaries, the crystal boundaries are provided with long chain-shaped carbides, the average size of the carbides is 3.0-4.0 mu m, and the grain size is 4-5 grade; the mechanical property of the heated surface of the G102 steel to be evaluated is 541-567MPa, and the high-temperature creep rupture work of the high-temperature creep test sample is 10.7J-12.3J;
establishing a correlation database for the standard range of the normal-temperature physicochemical characteristic data, the high-temperature creep rupture work and the high-temperature creep data;
carrying out normal-temperature physicochemical inspection and high-temperature creep test on a heating surface of G102 steel to be evaluated to obtain actual normal-temperature physicochemical characteristic parameter data and actual high-temperature creep rupture work of the heating surface of the G102 steel to be evaluated, and judging whether the actual normal-temperature physicochemical characteristic parameter data and the actual high-temperature creep rupture work respectively accord with the normal-temperature physicochemical characteristic data standard range and the high-temperature creep rupture work standard range;
and if the actual normal-temperature physicochemical characteristic parameter data accord with the normal-temperature physicochemical characteristic data standard range, and the actual high-temperature creep rupture work accords with the high-temperature creep rupture work standard range, searching target high-temperature creep data corresponding to the high-temperature creep rupture work standard range in the association database according to the actual normal-temperature physicochemical characteristic parameter, and evaluating the heating surface of the G102 steel to be evaluated by utilizing the target high-temperature creep data and adopting an isotherm extrapolation method to obtain the high-temperature service life of the heating surface of the G102 steel to be evaluated.
2. A rapid high-temperature life evaluation system for a G102 steel heating surface is characterized by specifically comprising:
the data statistics module is used for analyzing and summarizing a large amount of normal-temperature physicochemical characteristic data and high-temperature performance data accumulated in long-term heating surface evaluation work according to a high-temperature creep damage mechanism, determining a normal-temperature physicochemical characteristic data range associated with the high-temperature performance data, and finally determining high-temperature creep data associated with the normal-temperature physicochemical characteristic data range by combining test verification, wherein the normal-temperature physicochemical characteristic data comprises part or all of chemical composition data, metallographic characteristic data, carbide size data and mechanical property data;
the first test control module is used for carrying out a high-temperature creep rupture work test on a high-temperature creep sample again by adopting a small sample creep testing machine to obtain a high-temperature creep rupture work standard range, and obtaining a normal-temperature physicochemical characteristic data standard range according to the high-temperature creep rupture work standard range and the normal-temperature physicochemical characteristic data range, wherein the normal-temperature physicochemical characteristic data range is as follows: the chemical composition of the heating surface of the G102 steel to be evaluated conforms to the alloy composition range in GB 5310; the metallographic structure of the heating surface of the G102 steel to be evaluated is that carbide particles are precipitated on crystal grains and crystal boundaries, the crystal boundaries are provided with long chain-shaped carbides, the average size of the carbides is 3.0-4.0 mu m, and the grain size is 4-5 grade; the mechanical property of the heated surface of the G102 steel to be evaluated is 541-567MPa, and the high-temperature creep rupture work of the high-temperature creep test sample is 10.7J-12.3J;
the data association module is used for establishing an association database by utilizing the normal-temperature physicochemical characteristic data standard range, the high-temperature creep rupture work and the high-temperature creep data;
the second test control module is used for carrying out normal-temperature physicochemical inspection and high-temperature creep test on the heating surface of the G102 steel to be evaluated, obtaining actual normal-temperature physicochemical characteristic parameter data and actual high-temperature creep rupture work of the heating surface of the G102 steel to be evaluated, and judging whether the actual normal-temperature physicochemical characteristic parameter data and the actual high-temperature creep rupture work respectively meet the normal-temperature physicochemical characteristic data standard range and the high-temperature creep rupture work standard range;
and the evaluation execution module is used for searching target high-temperature creep data corresponding to the high-temperature creep rupture work standard range in the association database according to the actual normal-temperature physicochemical characteristic parameters if the actual normal-temperature physicochemical characteristic parameter data conforms to the normal-temperature physicochemical characteristic data standard range and the actual high-temperature creep rupture work conforms to the high-temperature creep rupture work standard range, evaluating the heating surface of the G102 steel to be evaluated by utilizing the target high-temperature creep data and adopting an isothermal line extrapolation method, and obtaining the high-temperature service life of the heating surface of the G102 steel to be evaluated.
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Address after: No. 2096, Beijing New Energy Technology Research Institute Patentee after: Guoneng boiler and Pressure Vessel Inspection Co.,Ltd. Address before: No. 2096, Beijing New Energy Technology Research Institute Patentee before: GUODIAN BOILER AND PRESSURE VESSEL INSPECTION Co.,Ltd. Address after: No. 2096, Beijing New Energy Technology Research Institute Patentee after: GUODIAN BOILER AND PRESSURE VESSEL INSPECTION Co.,Ltd. Address before: No. 2096, Beijing New Energy Technology Research Institute Patentee before: GUODIAN BOILER AND PRESSURE VESSEL INSPECTION CENTER |