CN-121976019-A - Method for dynamically regulating and controlling normalizing temperature of wind power flange based on furnace number component

CN121976019ACN 121976019 ACN121976019 ACN 121976019ACN-121976019-A

Abstract

The invention belongs to the technical field of heat treatment manufacturing of large-scale forgings, in particular to a method for dynamically regulating and controlling the normalizing temperature of a wind power flange based on furnace number components, which comprises the following steps of obtaining furnace number component data of raw materials of the wind power flange to be treated; the method comprises the steps of establishing a normalizing process temperature window, carrying out process robustness grading judgment on a furnace number material based on the content of core microalloy elements in furnace number component data to determine the grain growth or strengthening phase dissolution behavior tendency of the furnace number material at different temperatures, dynamically matching and locking the optimal normalizing temperature of the furnace number material in the normalizing process temperature window according to the process robustness grading judgment result, and outputting the optimal normalizing temperature as a process instruction to a heat treatment execution unit. The invention realizes the accurate regulation and control of one-furnace one-process, effectively inhibits the coarsening of crystal grains of the low-niobium material, ensures the full dissolution of the reinforced phase of the high-vanadium material, and remarkably improves the grain size and the stability of mechanical properties of the wind power flange.

Inventors

AN FENGJUN
YANG KEZHEN
PAN TIANFU
Shao Suo
XU QIANGQIANG

Assignees

丹东丰能工业股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260407

Claims (9)

1. The method for dynamically regulating and controlling the normalizing temperature of the wind power flange based on the furnace number component is characterized by comprising the following steps of: Step S1, furnace number component data of a raw material of a wind power flange to be processed is obtained, wherein the furnace number component data is the content of key microalloy elements; step S2, determining a lower normalizing process temperature limit and an upper normalizing process temperature limit corresponding to the furnace number material through thermodynamic calculation based on the furnace number component data so as to construct a normalizing process temperature window; Step S3, based on the content of core microalloy elements in the furnace number component data, carrying out process robustness grading judgment on the furnace number material so as to determine the grain growth or the behavior tendency of strengthening phase dissolution of the furnace number material at different temperatures; Step S4, dynamically matching and locking the optimal normalizing temperature of the furnace number material in the normalizing process temperature window according to the process robustness grading judgment result; and S5, outputting the optimal normalizing temperature as a process instruction to a heat treatment executing unit.
2. The method for dynamically regulating and controlling the normalizing temperature of the wind power flange based on the furnace number component, which is disclosed by claim 1, is characterized by comprising the steps of obtaining furnace number component data of raw materials of the wind power flange to be processed, and specifically obtaining smelting analysis components by scanning two-dimensional codes of a steel mill material book or detecting by using a direct-reading spectrometer; the key microalloy element content comprises the contents of niobium, vanadium, carbon, silicon, manganese, aluminum and nitrogen.
3. The method for dynamically regulating and controlling the normalizing temperature of the wind power flange based on the furnace number component according to claim 1, wherein the determining the normalizing process temperature lower limit corresponding to the furnace number material is specifically as follows: based on the furnace number component data, calculating the complete austenitizing critical temperature of the furnace number material by using a modified Andrews empirical formula The method comprises the following steps: ; Wherein each element symbol represents the mass fraction thereof; in combination with the large-section diathermanous hysteresis characteristic of the wind power flange A temperature compensation value delta T is increased based on the temperature, and Is determined as the lower limit of the normalizing process temperature The value range of the temperature compensation value delta T is 30-50 ℃.
4. A method for dynamically regulating and controlling normalizing temperature of wind power flange based on furnace number component according to claim 3, wherein the lower limit of the normalizing process temperature window From the following components The value of DeltaT is positively correlated with the wall thickness of the wind power flange, 30 ℃ is taken by DeltaT when the wall thickness is in the range of 300-400mm, 40 ℃ is taken by DeltaT when the wall thickness is in the range of 400-500mm, and 50 ℃ is taken by DeltaT when the wall thickness is greater than 500 mm.
5. The method for dynamically regulating and controlling the normalizing temperature of the wind power flange based on the furnace number component according to claim 1, wherein the determining the normalizing process temperature upper limit corresponding to the furnace number material specifically comprises the following steps: based on the content of microalloy elements in the furnace number component data, calculating the critical dissolution temperature of massive dissolution of the carbonitride and losing the pinning effect of the grain boundary by adopting a solid solubility product formula The method comprises the following steps: ; Wherein, the 、、 Respectively corresponding element mass fractions, wherein T is thermodynamic temperature; to ensure that the crystal grains are not coarsened, an upper limit of the normalizing process temperature is set At least 20 ℃ below the critical dissolution temperature.
6. The method for dynamically regulating and controlling the normalizing temperature of a wind power flange based on furnace number components according to claim 1, wherein the step of carrying out process robustness grading judgment on furnace number materials comprises the following steps: Taking the content of the core microalloy element niobium as a main judging index, and carrying out comprehensive grading by assisting with the content of aluminum-nitrogen ratio or vanadium, and dividing the material into at least three categories: The first type is sensitive material, and the judging condition is that the content of niobium is lower than 0.015%; The second type is a standard material, and the judgment condition is that the content of niobium is between 0.015 and 0.030 percent; The third type is a reinforced material, and the judgment condition is that the content of niobium is higher than 0.030% or the content of vanadium is higher than 0.06%.
7. The method for dynamically regulating and controlling the normalizing temperature of a wind power flange based on the furnace number component according to claim 6, wherein the optimal normalizing temperature of the furnace number material is dynamically matched and locked, specifically: For the material judged to be the first sensitive type, the lower limit of the normalizing process temperature window is used for preventing coarsening of grains Determining the optimum normalizing temperature thereof The optimal normalizing temperature The value is 890-900 ℃; For materials determined to be of the second standard type, a preset standard process temperature of 910 ℃ is determined to be the optimal normalizing temperature ; For the material judged to be the third type of strengthening, the upper limit of the normalizing process temperature is not exceeded in order to promote the sufficient dissolution of the strengthening phase On the premise of that a certain temperature value in a preset high temperature range of 930 ℃ to 940 ℃ which is higher than the standard process temperature is determined as the optimal normalizing temperature 。
8. The method for dynamically regulating and controlling the normalizing temperature of a wind power flange based on the furnace number component according to claim 1, wherein the ratio Al/N of the aluminum content to the nitrogen content in the furnace number component data is used as an auxiliary judging index; When Al/N is less than 2, judging that the material has a coarsening risk of crystal grains, and comprehensively grading by combining the content of niobium; when Al/N >4, judging that the material has insufficient dissolution risk of aluminum nitride AlN, and compensating and correcting the optimal normalizing temperature after grading judgment.
9. A system for dynamically regulating wind power flange normalizing temperature based on furnace number composition for implementing the method of any one of claims 1-8, comprising: The component acquisition module is used for acquiring furnace number component data of the raw material of the wind power flange to be processed; The temperature calculation module is connected with the component acquisition module and is used for determining the lower limit of the normalizing process temperature through thermodynamic calculation based on the furnace number component data And upper limit of normalizing process temperature ; The grading judgment module is connected with the component acquisition module and is used for carrying out grading judgment on the process robustness of the material based on the content of the core microalloy element in the furnace number component data; the temperature matching module is respectively connected with the temperature calculation module and the grading judgment module and is used for judging whether the temperature is higher than the grading judgment result according to the grading judgment result And Dynamic matching and locking of optimal normalizing temperature in a structured window ; The instruction output module is in communication connection with the temperature matching module and the PLC control system of the heat treatment furnace and is used for converting the optimal normalizing temperature into a control instruction and issuing and executing the control instruction.

Description

Method for dynamically regulating and controlling normalizing temperature of wind power flange based on furnace number component Technical Field The invention belongs to the technical field of heat treatment manufacturing of large forgings, and particularly relates to a method for dynamically regulating and controlling the normalizing temperature of a wind power flange based on furnace number components. Background In the field of manufacturing large-scale wind power flanges, microalloyed steel such as S355NL, Q355NE and the like is widely adopted due to good comprehensive mechanical properties. The normalizing heat treatment is a key process for regulating the grain size of the material and ensuring the low-temperature impact toughness and strength. Currently, an "empirically" fixing process is commonly adopted in the industry for the normalizing treatment of such materials, i.e. the normalizing temperature is set to be approximately 910 ℃ plus or minus 10 ℃ regardless of the specific furnace number of the raw materials, the source of the steel mill and the fine fluctuation of the chemical components thereof. The mode of 'one-cut' can be maintained when dealing with thin-wall parts or raw materials with consistent components, but the limitation is increasingly prominent when facing the thick-wall flange (the wall thickness is more than or equal to 300 mm) required by a large megawatt unit and the current situation that the components of the current raw material market fluctuate frequently: 1) The problem of 'over-firing' of the low-niobium material is that a part of furnace numbers are used for controlling the cost, and the microalloy element niobium (Nb) is controlled at the standard lower limit (such as < 0.015%). When the material is normalized at 910 ℃, grains are extremely easy to lose pinning effect and grow up abnormally, mixed crystals or coarse crystals are caused, and the low-temperature impact toughness of-40 ℃ and below is seriously deteriorated. 2) The 'underburn' problem of the high vanadium material is that part of furnace numbers adopt a high vanadium (V) route to ensure the strength. If the material is still normalized at 910 ℃, the carbonitride of vanadium cannot be fully dissolved in solid, so that the precipitation strengthening effect is greatly reduced, and finally the yield strength of the material is difficult to reach the standard. 3) The process adjustment depends on manual experience, when the performance is unqualified, the adjustment of process parameters often depends on the experience estimation of technicians, and the quantitative scientific basis is lacked, so that the efficiency is low, and mass quality accidents are easily caused. Therefore, how to overcome the defects and realize the accurate matching of the normalizing process and the raw material gene becomes an industry common problem for improving the quality stability of the large megawatt wind power flange. Disclosure of Invention The invention aims to provide a method for dynamically regulating and controlling the normalizing temperature of a wind power flange based on furnace number components, which aims to solve the technical problems that the traditional fixed normalizing process cannot adapt to chemical component fluctuation of raw materials with different furnace numbers, low-niobium materials are easy to generate coarse crystals after burning, high-vanadium materials are easy to generate underburn strength, process regulation depends on manual experience, large-section forgings are uneven in diathermy and the like, and realize the accurate and automatic regulation of one-furnace one-process of the wind power flange normalizing process. The technical scheme adopted by the invention for achieving the purpose is that the method for dynamically regulating and controlling the normalizing temperature of the wind power flange based on the furnace number component comprises the following steps: Step S1, furnace number component data of a raw material of a wind power flange to be processed is obtained, wherein the furnace number component data is the content of key microalloy elements; step S2, determining a lower normalizing process temperature limit and an upper normalizing process temperature limit corresponding to the furnace number material through thermodynamic calculation based on the furnace number component data so as to construct a normalizing process temperature window; Step S3, based on the content of core microalloy elements in the furnace number component data, carrying out process robustness grading judgment on the furnace number material so as to determine the grain growth or the behavior tendency of strengthening phase dissolution of the furnace number material at different temperatures; Step S4, dynamically matching and locking the optimal normalizing temperature of the furnace number material in the normalizing process temperature window according to the process robustness grading judgment result;