Multi-element nitroalloy steel rolling process

Abstract

The invention discloses a multi-element nitroalloy steel rolling process, and relates to the technical field of metal material processing, the rolling process comprises the following components: raw material preparation: a multi-element nitroalloy with a specific proportion is selected as a raw material, the alloy comprises the following components in percentage by mass: 20-37% of Si, 10-22% of N, 8-21% of Ti, 4-9% of Cr, 0.5-3% of B, less than or equal to 1% of V, less than or equal to 1% of Nb, less than or equal to 0.15% of S and less than or equal to 0.15% of P; by integrating advanced temperature control equipment and an intelligent monitoring system, strict control over temperature fluctuation in the rolling process is achieved, the temperature fluctuation range is strictly limited within + / -50 DEG C, and the stability and uniformity of steel rolling are remarkably improved through the innovative design; the problems of uneven internal structure and performance difference of the steel caused by temperature fluctuation are effectively avoided, the continuity and the consistency of the steel in the rolling process are guaranteed through near-constant-temperature rolling, and the yield and the quality stability of the steel are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of metal material processing, in particular to a multi-element nitrided alloy steel rolling process. Background Art

[0002] With the continuous development of modern industrial technology, the requirements for steel performance and quality are increasing. Especially in the fields of high-end equipment manufacturing, aerospace, and automobile manufacturing, more stringent requirements are put forward for the strength, toughness, and wear resistance of steel. In order to meet these needs, it is particularly important to develop new steels with excellent comprehensive performance and their rolling processes. Among them, multi-element nitrided alloy steels have gradually become a research hotspot in the steel field due to their unique alloy composition and excellent physical and chemical properties.

[0003] However, in the traditional steel rolling process, there are often problems of inaccurate temperature control and poor rolling stability. First of all, temperature is one of the key factors affecting the rolling quality and performance of steel. Traditional rolling processes often find it difficult to achieve precise control of temperature during the rolling process, resulting in uneven internal structure of the steel and large performance differences. Secondly, temperature fluctuations during the rolling process will also cause uneven deformation of the steel, affecting the dimensional accuracy and surface quality of the product. In addition, traditional rolling processes mostly rely on manual experience for temperature adjustment and rolling parameter setting, which is difficult to achieve automated and intelligent control. Not only is the production efficiency low, but there are also major safety hazards.

[0004] Therefore, in view of the deficiencies and shortcomings of the prior art, the present invention proposes a multi-element nitrided alloy steel rolling process, which not only improves the automation level and safety of the production process, but also further improves the mechanical properties and overall quality of the steel, meeting the market's stringent demands for high-end steel. Summary of the invention

[0005] The purpose of the present invention is to make up for the shortcomings of the prior art and provide a multi-element nitriding alloy steel rolling process, which achieves a significant improvement in steel performance by precisely controlling raw material composition, heating pretreatment, near-constant temperature rolling, online quenching-tempering treatment and subsequent detection steps. In particular, the near-constant temperature rolling technology, by integrating advanced temperature control equipment and intelligent monitoring systems, strictly controls the temperature fluctuation during the rolling process within ±50°C, ensuring uniform deformation and high-quality output of the steel. This process not only improves the strength and toughness of the steel, but also further optimizes the organizational structure of the steel through online quenching-tempering treatment, meeting the stringent requirements on steel performance in the field of high-end equipment manufacturing.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a multi-element nitrided alloy steel rolling process, the process mainly comprising the following steps: Raw material preparation: a multi-element nitrided alloy containing a specific proportion is selected as the raw material. The alloy contains, by mass content: Si20-37%, N10-22%, Ti8-21%, Cr4-9%, B0.5-3%, V≤1%, Nb≤1%, S≤0.15%, P≤0.15%, and the balance is iron and unavoidable impurities; Heating and pretreatment: The raw steel billet is fed into the heating furnace and heated to a predetermined temperature through a precise temperature control system. During the heating process, the temperature of the steel billet is monitored in real time using a temperature sensor; Near constant temperature rolling: It consists of three parts: temperature control, intelligent monitoring and alarm, and rolling speed and cycle control; Online quenching and tempering treatment: Utilize the waste heat generated after steel rolling to carry out online quenching and tempering treatment. By precisely controlling the cooling rate and cooling time, fine regulation of steel structure can be achieved, further improving the strength and toughness of steel. Subsequent processing and testing: The rolled steel is cut and straightened, and the finished steel is fully tested for quality using advanced testing equipment and methods.

[0007] Furthermore, in the raw material preparation, the storage environment of the raw materials is strictly controlled, with the humidity not exceeding 60% and the temperature between 10-30°C.

[0008] Furthermore, the heating and pretreatment determine the predetermined temperature of the steel billet to be 1100°C according to the characteristics of the multi-element nitrided alloy steel and the subsequent rolling process requirements. In the initial stage of heating, it is heated to 500°C at a slower heating rate of 10°C per minute. After reaching 500°C, it is heated at a rate of 15°C per minute until it approaches 1100°C. During the entire heating process, temperature sensors at different positions in the heating furnace are used to collect data every 10 seconds and transmit it to the system in real time. When approaching 1100°C, the heating rate is reduced and fine-tuned for 5-10 minutes, so that the steel billet is finally stabilized at 1100°C.

[0009] Furthermore, the near-constant temperature rolling includes: Temperature control: Using advanced temperature control equipment, the temperature fluctuation during rolling is strictly controlled within ±50℃; Intelligent monitoring and alarm: Multiple high-precision temperature sensors installed at different parts of the rolling mill, combined with an intelligent control system, can realize dynamic multi-directional real-time temperature monitoring of steel. Once the temperature exceeds the set range, an alarm will be issued immediately and corresponding control measures will be automatically initiated; Rolling speed and cycle control: Based on real-time temperature data and steel deformation, the intelligent control system accurately adjusts the rolling speed and the duration of each rolling cycle to ensure uniform deformation of the steel.

[0010] Furthermore, the temperature control in the near-constant temperature rolling sets the ideal temperature in the rolling process to 900°C and the actual temperature to 850-950°C according to the characteristics of the steel and the process requirements. The temperature data of the steel is collected in real time through the temperature sensor. If the detected temperature is lower than 850°C, the temperature control equipment will automatically increase the heating power to increase the temperature. If the temperature is higher than 950°C, the heating power will be reduced to drop the temperature.

[0011] Furthermore, for the intelligent monitoring and alarm in the near-constant temperature rolling, multiple high-precision temperature sensors are installed at the entrance, exit and different parts in the middle of the rolling mill. When the steel enters the rolling mill and starts rolling, the temperature sensor collects temperature data at different positions of the steel every 10 seconds, and immediately analyzes and processes it. If the detected temperature is lower than 850°C, the system will determine that the temperature is too low and immediately issue a low temperature alarm. If the temperature is higher than 950°C, the system will determine that the temperature is too high and issue a high temperature alarm.

[0012] Furthermore, the rolling speed and cycle control in the near-constant temperature rolling, according to the material, specifications and expected performance requirements of the steel, determines the initial rolling speed to be 10 meters / minute and the rolling cycle duration to be 30 seconds. During the rolling process, real-time temperature data is continuously transmitted to the intelligent control system through the temperature sensor. When the temperature is in the lower range of 850°C to 900°C, the intelligent control system will appropriately reduce the rolling speed and adjust it to 8 meters / minute. At the same time, it will extend the duration of each rolling cycle to 35 seconds to slow down the rolling process. When the temperature is in the higher range of 900°C to 950°C, the intelligent control system will increase the rolling speed to 12 meters / minute, shorten the rolling cycle duration to 25 seconds, and speed up the rolling process.

[0013] Furthermore, after the steel is rolled, the online quenching-tempering treatment begins with the waste heat generated after the steel is rolled. During the quenching process, the steel is cooled at a faster cooling rate, and the cooling rate is controlled at 100-150°C / second. The cooling time is 5-10 seconds depending on the specifications and composition of the steel, so that the temperature of the steel drops rapidly to 400-500°C. After the quenching is completed, the tempering treatment is immediately carried out, and the tempering temperature is set at 500-600°C, and the holding time is 20-30 minutes.

[0014] Furthermore, the subsequent processing and testing is to cut the steel into suitable lengths according to the predetermined size requirements using high-precision cutting equipment after the steel is rolled, and put the cut steel into straightening equipment to eliminate the bending and twisting of the steel during rolling and cutting by applying pressure and adjusting the position of the straightening rollers, so that the steel can remain straight. After completing the above processing, the finished steel is fully quality tested using advanced testing equipment and methods.

[0015] Furthermore, in the subsequent processing and testing, advanced testing equipment and methods are used to conduct comprehensive quality testing on the finished steel products, including visual inspection at room temperature, dimensional measurement using calipers, chemical composition analysis using a spectrometer to detect the content of each element, and verification of whether the chemical composition meets the standards. Mechanical property testing is performed using a tensile testing machine at room temperature to determine the tensile strength, yield strength, and elongation indicators, and Rockwell hardness testing is used to evaluate the hardness of the steel.

[0016] Compared with the prior art, this multi-element nitrided alloy steel rolling process has the following beneficial effects: 1. The present invention achieves strict control of temperature fluctuations during the rolling process by integrating advanced temperature control equipment and intelligent monitoring systems, and strictly limits the temperature fluctuation range to within ±50°C. This innovative design significantly improves the stability and uniformity of steel rolling, and effectively avoids the problems of uneven internal structure and performance differences of steel caused by temperature fluctuations. Near-constant temperature rolling not only ensures the continuity and consistency of steel during the rolling process, but also greatly improves the yield and quality stability of steel, bringing higher production efficiency and lower scrap rate to the enterprise, thereby significantly improving economic benefits.

[0017] 2. The present invention realizes real-time, dynamic and multi-directional monitoring of the temperature during the steel rolling process through an intelligent monitoring and alarm system combined with a high-precision temperature sensor. Once the temperature exceeds the preset range, the system will immediately issue an alarm and automatically start control measures to ensure that the steel is always rolled within the optimal temperature range. This intelligent and automated temperature control method greatly reduces the frequency and difficulty of manual intervention, improves the automation level and safety of the production process, and the accuracy of intelligent control also ensures the optimization of steel performance at different rolling stages, further improves the mechanical properties and overall quality of steel, and meets the market's stringent demands for high-end steel.

[0018] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1The figure is a flow chart of a rolling process of a multi-element nitriding alloy steel. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Embodiment 1: A multi-element nitrided alloy steel rolling process, the rolling process includes the following steps: raw material preparation, heating and pretreatment, near constant temperature rolling, online quenching-tempering treatment, subsequent treatment and detection processing procedures, the specific process steps are as follows: Raw materials preparation: Raw material selection and proportion: A multi-element nitride alloy containing a specific proportion is selected as the raw material. The specific proportion of the alloy is: Si30%, N16%, Ti15%, Cr6%, B2%, V0.5%, Nb0.5%, S0.1%, P0.1%, and the balance is iron and inevitable impurities.

[0023] Raw material storage: Raw materials are stored in a strictly controlled environment with humidity not exceeding 60% and temperature maintained at 20℃.

[0024] Heating and pretreatment: Heating process: The raw steel billet is fed into the heating furnace and heated by a precise temperature control system. In the initial stage of heating, the steel billet is heated from room temperature to 500°C at a rate of 10°C per minute, and then continued to be heated to nearly 1100°C at a rate of 15°C per minute. During the heating process, temperature sensors at different positions in the heating furnace collect data every 10 seconds and transmit it to the system in real time to ensure the accuracy of temperature control. When it approaches 1100°C, the heating rate is reduced for fine-tuning, which lasts for 8 minutes until the steel billet is finally stabilized at 1100°C.

[0025] Nearly constant temperature rolling: Temperature control: Using advanced temperature control equipment, the temperature fluctuation during the rolling process is strictly controlled within ±50℃. The ideal temperature during the rolling process is set at 900℃, and the actual temperature is controlled at 850-950℃. High-precision temperature sensors installed in different parts of the rolling mill collect temperature data of the steel in real time and feed it back to the temperature control equipment. When the temperature is lower than 850℃, the heating power is automatically increased, and when the temperature is higher than 950℃, the heating power is reduced.

[0026] Intelligent monitoring and alarm: Multiple high-precision temperature sensors are installed at the entrance, exit and different parts of the rolling mill. The temperature data of different positions of the steel are collected every 10 seconds and analyzed immediately. When the temperature is detected to be lower than 850℃ and higher than 950℃, the system will issue low temperature and high temperature alarms respectively, and automatically start corresponding control measures.

[0027] Rolling speed and cycle control: The initial setting rolling speed is 10 m / min, and the rolling cycle is 30 seconds. According to the real-time temperature data and the deformation of the steel, the intelligent control system adjusts the rolling speed and cycle in real time. When the temperature is 850-900°C, the rolling speed is reduced to 8 m / min and the rolling cycle is extended to 35 seconds. When the temperature is 900-950°C, the rolling speed is increased to 12 m / min and the rolling cycle is shortened to 25 seconds.

[0028] Online quenching and tempering treatment: Quenching treatment: After the steel is rolled, the residual heat generated after rolling is used for online quenching treatment. During the quenching process, the steel is cooled rapidly at a cooling rate of 120°C / second, so that the temperature of the steel drops rapidly to 450°C. The cooling time is 8 seconds.

[0029] Tempering treatment: After quenching, tempering treatment is carried out immediately. The tempering temperature is set to 550℃ and the holding time is 25 minutes to eliminate quenching stress and improve the toughness and stability of the steel.

[0030] Subsequent processing and testing: Cutting and straightening: Use high-precision cutting equipment to cut the steel into appropriate lengths according to predetermined size requirements, place the cut steel into straightening equipment, and eliminate the bending and twisting of the steel during the rolling and cutting process by applying pressure and adjusting the position of the straightening rollers.

[0031] Quality inspection: The finished steel products are subjected to comprehensive quality inspection, including appearance inspection at room temperature, dimensional measurement with calipers, chemical composition analysis with a spectrometer, mechanical property testing (determination of tensile strength, yield strength, elongation) and Rockwell hardness testing with a tensile testing machine at room temperature.

[0032] Embodiment 2: A multi-element nitrided alloy steel rolling process, the rolling process includes the following steps: raw material preparation, heating and pretreatment, near constant temperature rolling, online quenching-tempering treatment, subsequent treatment and detection processing procedures, the specific process steps are as follows: Raw material preparation: Multi-element nitride alloy is selected as the raw material, and its mass content is adjusted to: Si25%, N15%, Ti15%, Cr6%, B1.5%, V0.5%, Nb0.5%, S≤0.1%, P≤0.1%, the remainder is iron and unavoidable impurities. The storage environment humidity is controlled at 55%, and the temperature is between 15-25℃.

[0033] Heating and pretreatment: The raw steel billet is fed into the heating furnace with the predetermined temperature set at 1150°C. In the initial stage of heating, the temperature is raised to 550°C at a rate of 8°C per minute, and then continued to rise to close to 1150°C at a rate of 18°C ​​per minute. During the whole process, the temperature sensor is used to collect data every 8 seconds and make real-time adjustments, and finally stabilized at 1150°C for 7 minutes.

[0034] Near-constant temperature rolling: The temperature control is set to an ideal temperature of 920°C, and the actual control is 870-970°C. The intelligent monitoring system collects temperature data every 8 seconds and adjusts the rolling speed and cycle according to the real-time temperature. The initial rolling speed is 11 m / min and the cycle time is 28 seconds. When the temperature is lower than 870°C, it is reduced to 9 m / min and the cycle time is extended to 32 seconds. When the temperature is higher than 970°C, it is increased to 13 m / min and the cycle time is shortened to 23 seconds.

[0035] Online quenching-tempering treatment: The cooling rate is controlled at 120℃ / s for 7 seconds, so that the steel temperature drops to 450℃. The tempering temperature is set at 550℃ and kept at this temperature for 25 minutes.

[0036] Subsequent processing and testing: Use high-precision cutting equipment to cut according to the predetermined size. After straightening, use appearance inspection, size measurement, chemical composition analysis by spectrometer, as well as tensile test and Rockwell hardness test for quality inspection.

[0037] Embodiment three: A multi-element nitrided alloy steel rolling process, the rolling process includes the following steps: raw material preparation, heating and pretreatment, near constant temperature rolling, online quenching-tempering treatment, subsequent treatment and detection processing procedures, the specific process steps are as follows: Raw material preparation: adjust the raw material ratio to: Si32%, N18%, Ti12%, Cr7%, B2%, V0.8%, Nb0.8%, S≤0.12%, P≤0.12%, storage environment humidity 50%, temperature 12-28℃.

[0038] Heating and pretreatment: The preset temperature is set at 1080°C. In the initial stage, it is increased to 520°C at 12°C per minute, and then increased to nearly 1080°C at 14°C per minute. Data is collected every 12 seconds during the whole process, and the final stabilization lasts for 6 minutes.

[0039] Near-constant temperature rolling: The ideal temperature is set at 880℃, the control range is 830-930℃, intelligent monitoring is performed every 12 seconds, the initial rolling speed is 10.5 m / min, the cycle is 31 seconds, and the rolling speed and cycle are adjusted according to the temperature.

[0040] Online quenching-tempering treatment: cooling rate 130℃ / s, time 8 seconds to 420℃, tempering 520℃, keeping warm for 27 minutes.

[0041] Subsequent processing and testing: Use high-precision cutting equipment to cut according to the predetermined size. After straightening, use appearance inspection, size measurement, chemical composition analysis by spectrometer, as well as tensile test and Rockwell hardness test for quality inspection.

[0042] Embodiment 4: A multi-element nitrided alloy steel rolling process, the rolling process includes the following steps: raw material preparation, heating and pretreatment, near constant temperature rolling, online quenching-tempering treatment, subsequent treatment and detection processing procedures, the specific process steps are as follows: Raw material preparation: The raw material ratio is adjusted to: Si35%, N20%, Ti18%, Cr5%, B2.5%, V0.7%, Nb0.7%, S≤0.14%, P≤0.14%, storage environment humidity 45%, temperature 18-22℃.

[0043] Heating and pretreatment: The preset temperature is 1060°C, the initial heating rate is 11°C per minute to 530°C, and then it is increased to nearly 1060°C at 16°C per minute. Data is collected every 9 seconds during the whole process, and the temperature is kept stable for 9 minutes.

[0044] Near-constant temperature rolling: ideal temperature 910℃, control range 860-960℃, intelligent monitoring every 9 seconds, initial rolling speed 9.5m / min, cycle 33 seconds, flexible adjustment according to temperature.

[0045] Online quenching and tempering treatment: cooling rate 140℃ / s, time 6 seconds to 480℃, tempering 580℃, keeping warm for 22 minutes.

[0046] Subsequent processing and testing: Use high-precision cutting equipment to cut according to the predetermined size. After straightening, use appearance inspection, size measurement, chemical composition analysis by spectrometer, as well as tensile test and Rockwell hardness test for quality inspection.

[0047] In addition, the comparison table of time and temperature parameters of the rolling process of multi-element nitrided alloy steel obtained through Examples 1 to 4 is shown in Table 1.

[0048] ; Table 1 Comparison table of time and temperature parameters of rolling process of multi-element nitrided alloy steel of Example 1-4 It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A multi-element nitrided alloy steel rolling process, characterized in that: The process mainly includes the following steps: Raw material preparation: a multi-element nitrided alloy containing a specific proportion is selected as the raw material. The alloy contains, by mass content: Si20-37%, N10-22%, Ti8-21%, Cr4-9%, B0.5-3%, V≤1%, Nb≤1%, S≤0.15%, P≤0.15%, and the balance is iron and unavoidable impurities; Heating and pretreatment: The raw steel billet is fed into the heating furnace and heated to a predetermined temperature through a precise temperature control system. During the heating process, the temperature of the steel billet is monitored in real time using a temperature sensor; Near constant temperature rolling: It consists of three parts: temperature control, intelligent monitoring and alarm, and rolling speed and cycle control; Online quenching and tempering treatment: Utilize the waste heat generated after steel rolling to carry out online quenching and tempering treatment. By precisely controlling the cooling rate and cooling time, fine regulation of steel structure can be achieved, further improving the strength and toughness of steel. Subsequent processing and testing: The rolled steel is cut and straightened, and the finished steel is fully tested for quality using advanced testing equipment and methods.

2. A multi-element nitrided alloy steel rolling process according to claim 1, characterized in that: The raw material preparation strictly controls the storage environment of the raw materials, with the humidity not exceeding 60% and the temperature between 10-30°C.

3. The multi-element nitrided alloy steel rolling process according to claim 1, characterized in that: The heating and pretreatment determines the predetermined temperature of the steel billet to be 1100°C according to the characteristics of the multi-element nitrided alloy steel and the subsequent rolling process requirements. In the initial stage of heating, the steel billet is heated to 500°C at a slower heating rate of 10°C per minute. After reaching 500°C, the temperature is increased at a rate of 15°C per minute until it approaches 1100°C. During the entire heating process, temperature sensors at different positions in the heating furnace are used to collect data every 10 seconds and transmit the data to the system in real time. When approaching 1100°C, the heating rate is reduced and fine-tuned for 5-10 minutes, so that the steel billet is finally stabilized at 1100°C.

4. The multi-element nitrided alloy steel rolling process according to claim 1, characterized in that: The nearly constant temperature rolling includes: Temperature control: Using advanced temperature control equipment, the temperature fluctuation during rolling is strictly controlled within ±50℃; Intelligent monitoring and alarm: Multiple high-precision temperature sensors installed at different parts of the rolling mill, combined with an intelligent control system, can realize dynamic multi-directional real-time temperature monitoring of steel. Once the temperature exceeds the set range, an alarm will be issued immediately and corresponding control measures will be automatically initiated; Rolling speed and cycle control: Based on real-time temperature data and steel deformation, the intelligent control system accurately adjusts the rolling speed and the duration of each rolling cycle to ensure uniform deformation of the steel.

5. A multi-element nitrided alloy steel rolling process according to claim 4, characterized in that: The temperature control in the near-constant temperature rolling sets the ideal temperature in the rolling process to 900°C and the actual temperature to 850-950°C according to the characteristics of the steel and the process requirements. The temperature data of the steel is collected in real time through the temperature sensor. If the detected temperature is lower than 850°C, the temperature control equipment will automatically increase the heating power to increase the temperature. If the temperature is higher than 950°C, the heating power will be reduced to drop the temperature.

6. A multi-element nitrided alloy steel rolling process according to claim 4, characterized in that: The intelligent monitoring and alarm in the near-constant temperature rolling is achieved by installing multiple high-precision temperature sensors at the entrance, exit and different parts of the rolling mill. When the steel enters the rolling mill and starts rolling, the temperature sensor collects temperature data at different positions of the steel every 10 seconds, and immediately analyzes and processes it. If the detected temperature is lower than 850°C, the system will determine that the temperature is too low and immediately issue a low temperature alarm. If the temperature is higher than 950°C, the system will determine that the temperature is too high and issue a high temperature alarm.

7. A multi-element nitrided alloy steel rolling process according to claim 4, characterized in that: The rolling speed and cycle control in the near-constant temperature rolling is determined based on the material, specifications and expected performance requirements of the steel, and the initial rolling speed is 10 meters per minute and the rolling cycle is 30 seconds. During the rolling process, real-time temperature data is continuously transmitted to the intelligent control system through the temperature sensor. When the temperature is in the lower range of 850°C to 900°C, the intelligent control system will appropriately reduce the rolling speed and adjust it to 8 meters per minute. At the same time, it will extend the duration of each rolling cycle to 35 seconds to slow down the rolling process. When the temperature is in the higher range of 900°C to 950°C, the intelligent control system will increase the rolling speed to 12 meters per minute, shorten the rolling cycle to 25 seconds, and speed up the rolling process.

8. The multi-element nitrided alloy steel rolling process according to claim 1, characterized in that: After the steel is rolled, the online quenching-tempering treatment begins with the waste heat generated after the steel is rolled. During the quenching process, the steel is cooled at a faster cooling rate, which is controlled at 100-150°C / second. The cooling time is 5-10 seconds depending on the specifications and composition of the steel, so that the temperature of the steel drops rapidly to 400-500°C. After the quenching is completed, the tempering treatment is immediately carried out, and the tempering temperature is set at 500-600°C for 20-30 minutes.

9. A multi-element nitrided alloy steel rolling process according to claim 1, characterized in that: The subsequent processing and testing is carried out after the steel is rolled. According to the predetermined size requirements, high-precision cutting equipment is used to cut it into appropriate lengths. The cut steel is placed in the straightening equipment. By applying pressure and adjusting the position of the straightening rollers, the bending and twisting of the steel during rolling and cutting are eliminated, so that the steel can remain straight. After completing the above processing, advanced testing equipment and methods are used to conduct comprehensive quality testing on the finished steel.

10. A multi-element nitrided alloy steel rolling process according to claim 9, characterized in that: In the subsequent processing and testing, advanced testing equipment and methods are used to conduct comprehensive quality testing on the finished steel products, including visual inspection at room temperature, dimensional measurement using calipers, chemical composition analysis using a spectrometer to detect the content of each element and verify whether the chemical composition is up to standard, mechanical property testing using a tensile testing machine at room temperature to measure the tensile strength, yield strength, and elongation, and Rockwell hardness testing to evaluate the hardness of the steel.

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