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Used round tube forming machines induction heating weld normalizing treatment
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- Release time：2022-04-11 11:30
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【概要描述】Normalizing treatment is currently the most widely used heat treatment method for welded pipe welds in domestic used round tube forming machines, and is sometimes called weld annealing treatment. The difference between the two is that the heating temperature of normalizing treatment is above Ac3, and the heating temperature of annealing treatment is lower, near A c1. For pipeline steel welded pipes, weld normalizing treatment is one of the heat treatment methods in the API standard.
Used round tube forming machines induction heating weld normalizing treatment
【概要描述】Normalizing treatment is currently the most widely used heat treatment method for welded pipe welds in domestic used round tube forming machines, and is sometimes called weld annealing treatment. The difference between the two is that the heating temperature of normalizing treatment is above Ac3, and the heating temperature of annealing treatment is lower, near A c1. For pipeline steel welded pipes, weld normalizing treatment is one of the heat treatment methods in the API standard.
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- Release time：2022-04-11 11:30
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Detail
Normalizing treatment is currently the most widely used heat treatment method for welded pipe welds in domestic used round tube forming machines, and is sometimes called weld annealing treatment. The difference between the two is that the heating temperature of normalizing treatment is above Ac3, and the heating temperature of annealing treatment is lower, near A c1. For pipeline steel welded pipes, weld normalizing treatment is one of the heat treatment methods in the API standard.
Weld induction heating normalizing treatment can be divided into online normalizing treatment and offline normalizing treatment according to its production configuration. Offline normalizing can be used for products with many specifications and small batches. Online normalizing should be used when product specifications are small and large batches.
Induction heating and normalizing treatment of welds is mainly used for low carbon and low alloy steel welded pipes strengthened with vanadium, niobium and titanium elements. The chemical composition of this type of steel is listed in Table 3. The purpose of normalizing the weld is to eliminate the internal stress generated by welding, refine the grain of the weld metal, improve the plasticity and toughness of the metal, and reduce the performance difference between the weld and the pipe body.
Selection of Induction Heating Normalizing Temperature for Weld Seam
The normalizing temperature of the used round tube forming machines in the traditional low alloy steel is 30-50 ℃ above Ac3. However, when the heating rate of induction heating is 20-50℃.s-1, Ac3 will move up with the increase of heating rate. According to the experience of induction heating quenching temperature, Ac3 will increase by 20-50℃, therefore, the normalizing temperature of induction heating low alloy steel weld should be selected at 50-100℃ above Ac3. The upper limit is taken when the steel contains Cr, V, and Ti alloying elements, and the lower limit is taken when these alloying elements are not contained. The Ac3 of the normalized steel listed in Table 3 below is 860-880℃, and the normalizing temperature for induction heating can be selected at 910-980℃.
The normalizing heating temperature should not be too high. Under normal heating conditions, the initial austenite grains of low-alloy hypoeutectoid steel begin to grow from 900 ℃, and grow rapidly above 950 ℃. Therefore, too high normalizing temperature is not conducive to refining the grain structure of the weld and reducing the effect of normalizing treatment. In addition, too high normalizing temperature will also aggravate metal oxidation in the weld zone, affect the surface quality of the welded pipe and reduce the yield of steel. Similarly, if the normalizing temperature is too low, the plasticity and toughness of the weld metal cannot be improved, and the purpose of normalizing treatment cannot be achieved.
Weld seam induction heating normalizing holding time and cooling method
The selection of welding seam induction heating and normalizing holding time, quenching, solid solution and normalizing treatment are all heat treatment methods for heating the steel to austenitizing temperature and cooling it at different cooling rates. The three treatments are the same for the purpose of austenitizing. Induction heating low alloy steel quenching treatment and austenitic hot-strength steel solution treatment, the test of canceling the austenitizing holding time, the results show that as long as the induction heating quenching and solution temperature is 50- After 100 ℃, the same heat treatment effect can be achieved without holding time, the solid solution amount of the strengthening elements is consistent, and the room temperature and high temperature mechanical properties after tempering and aging treatment are higher than those of the traditional treatment process. It can be seen that the cancellation of the holding time during the induction heating and normalizing process of the used round tube forming machines will not affect the effect of the later heat treatment. Table 4 shows that the mechanical properties of 10 steel welded pipes after induction heating without holding time annealing have achieved good results.
To sum up, for low-alloy hypoeutectoid steel, as long as the normalizing temperature of induction heating is properly selected and the welding seam heating temperature is uniform, the normalizing holding time can be completely cancelled without affecting the heat treatment effect. Because, considering the phase transformation rate of metal structure, temperature plays a decisive role, and the effect of temperature is much greater than the time factor, and changing time with temperature is the characteristic of induction heating rapid heat treatment.
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Analysis of seven key factors affecting the effective power output of second-hand high-frequency welded pipe machines
Time of issue : 2024-08-25
High frequency welded pipe machine is widely used in modern industry, especially in the pipe manufacturing industry. It is highly favored by users for its high efficiency and precision. In order to better understand and master this technology, this article will use the keyword "second-hand welded pipe machine" and combine it with practical applications to analyze the seven key factors of its effective power output.
Firstly, we need to clarify the definition of 'second-hand welded pipe machine'. Second hand welded pipe machine refers to equipment that has been used but has been repaired and debugged before being put back into use. Due to its newer production technology and lower purchasing costs, it has become an ideal choice for many small and medium-sized enterprises. However, understanding the influencing factors of power output issues that arise during use, especially in high-frequency and high-intensity operating environments, is crucial.
1. The aging degree of the equipment itself: The components of the second-hand welding pipe machine will wear and age to varying degrees over time, which directly affects the stability of its power output. The maintenance and regular inspection of equipment can reduce this impact.
2. Operating environment: Factors such as humidity, temperature, and electromagnetic interference also have a significant impact on the operation of second-hand welded pipe machines. Maintaining a good working environment is crucial for the effective power output of equipment.
3. Debugging and Calibration: Before the second-hand welded pipe machine is put back into use, it needs to undergo strict debugging and calibration to ensure that all parameters reach their optimal state. This has a significant impact on the stability and power output of the device.
4. Operational skills: Proficient operational skills are the key to ensuring the efficient operation of second-hand welded pipe machines. Familiar with device characteristics and able to flexibly adjust operating parameters can significantly improve power output efficiency.
5. Power quality: Unstable power supply can cause fluctuations in the power output of second-hand welded pipe machines. The use of high-quality power equipment to ensure stable voltage and current is the foundation for ensuring the normal operation of the equipment.
6. Maintenance: Regular maintenance can effectively extend the service life of second-hand welded pipe machines and help stabilize power output. During maintenance, key parts such as welding joints, cooling systems, and electrical components should be carefully inspected.
7. Load adaptability: The power output of a second-hand welded pipe machine is not only affected by the equipment itself, but also by its matching with the load. Appropriate load distribution and reasonable production scheduling can comprehensively improve the operational efficiency of equipment.
In summary, a comprehensive understanding and mastery of the seven key factors mentioned above can significantly improve the effective power output of second-hand high-frequency welded pipe machines, extend equipment life, and lay a solid foundation for enterprises to save costs and improve production efficiency. Mastering these key points will undoubtedly result in twice the result with half the effort when choosing and using a second-hand welded pipe machine.
For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier：www.usedpipemill.com
JinYuJie-Used Pipe Mills Supplier（Please click the link→) :second-hand pipe mill
High frequency welded pipe machine is widely used in modern industry, especially in the pipe manufacturing industry. It is highly favored by users for its high efficiency and precision. In order to better understand and master this technology, this article will use the keyword "second-hand welded pipe machine" and combine it with practical applications to analyze the seven key factors of its effective power output.
Firstly, we need to clarify the definition of 'second-hand welded pipe machine'. Second hand welded pipe machine refers to equipment that has been used but has been repaired and debugged before being put back into use. Due to its newer production technology and lower purchasing costs, it has become an ideal choice for many small and medium-sized enterprises. However, understanding the influencing factors of power output issues that arise during use, especially in high-frequency and high-intensity operating environments, is crucial.
1. The aging degree of the equipment itself: The components of the second-hand welding pipe machine will wear and age to varying degrees over time, which directly affects the stability of its power output. The maintenance and regular inspection of equipment can reduce this impact.
2. Operating environment: Factors such as humidity, temperature, and electromagnetic interference also have a significant impact on the operation of second-hand welded pipe machines. Maintaining a good working environment is crucial for the effective power output of equipment.
3. Debugging and Calibration: Before the second-hand welded pipe machine is put back into use, it needs to undergo strict debugging and calibration to ensure that all parameters reach their optimal state. This has a significant impact on the stability and power output of the device.
4. Operational skills: Proficient operational skills are the key to ensuring the efficient operation of second-hand welded pipe machines. Familiar with device characteristics and able to flexibly adjust operating parameters can significantly improve power output efficiency.
5. Power quality: Unstable power supply can cause fluctuations in the power output of second-hand welded pipe machines. The use of high-quality power equipment to ensure stable voltage and current is the foundation for ensuring the normal operation of the equipment.
6. Maintenance: Regular maintenance can effectively extend the service life of second-hand welded pipe machines and help stabilize power output. During maintenance, key parts such as welding joints, cooling systems, and electrical components should be carefully inspected.
7. Load adaptability: The power output of a second-hand welded pipe machine is not only affected by the equipment itself, but also by its matching with the load. Appropriate load distribution and reasonable production scheduling can comprehensively improve the operational efficiency of equipment.
In summary, a comprehensive understanding and mastery of the seven key factors mentioned above can significantly improve the effective power output of second-hand high-frequency welded pipe machines, extend equipment life, and lay a solid foundation for enterprises to save costs and improve production efficiency. Mastering these key points will undoubtedly result in twice the result with half the effort when choosing and using a second-hand welded pipe machine.
For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier：www.usedpipemill.com
JinYuJie-Used Pipe Mills Supplier（Please click the link→) :second-hand pipe mill
Analysis of the problem of non squareness in the adjustment of square and rectangular tubes and the method of correcting vertical rollers
Time of issue : 2024-08-24
Product feature introduction
Economical and cost-effective
Firstly, the price of second-hand welded pipe machines is relatively low, which is their most intuitive advantage. For small and medium-sized enterprises, purchasing second-hand equipment can effectively reduce initial investment costs while ensuring the basic functions and production efficiency of the equipment. This makes second-hand square tube machines highly competitive and cost-effective in the market.
Multi functional and easy to maintain
Another major selling point of second-hand welded pipe machines is their versatility. After appropriate adjustments and maintenance, these machines can produce steel pipes of different specifications and shapes to meet diverse market demands. In addition, the maintenance cost of second-hand equipment is usually lower because at the time of purchase, suppliers often provide detailed usage records and maintenance guidelines for the equipment, making it easier for users to perform daily maintenance and repair minor faults.
The issue of 'non square' in the adjustment process
In the process of using a second-hand square tube machine to produce square and rectangular tubes, a common problem is the phenomenon of "square and rectangular tubes not being square". Specifically, this means that the produced square or rectangular pipes have uneven edges, angles, or lengths on each side, which can affect the quality and aesthetics of the product. The main reasons for this problem are improper machine tool parameter settings, roller wear, and differences in material quality.
Correction method of vertical roller
In order to solve the problem of "non square", the use of standing rollers is particularly important. Vertical roller is a tool used to adjust the shape of pipes. By setting the pressure and position of the vertical roller reasonably, the formed square tube can be calibrated to meet the standard requirements in terms of appearance. In the specific operation, the staff need to gradually adjust the angle and force of the vertical roller according to the actual deviation of the square tube, until the various dimensions of the square tube meet the standards.
Application scenarios and instance analysis
The second-hand welded pipe machine is not only suitable for standardized production, but also meets personalized customization needs. Taking construction sites and pipeline installation projects as examples, these fields often require steel pipes of different sizes and shapes. By adjusting the vertical rollers, the second-hand welded pipe machine can quickly produce square and rectangular pipes that meet specific requirements, greatly improving production efficiency and product quality.
Overall, second-hand square tube machines have become an ideal choice in the market due to their affordability, versatility, and ease of maintenance. By setting up and using vertical rollers reasonably, it is possible to effectively address the issue of "non square" in production and ensure product quality. These unique selling points not only make second-hand welded pipe machines shine in industrial manufacturing, but also bring significant economic benefits to enterprises.
For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier：www.usedpipemill.com
JinYuJie-Used Pipe Mills Supplier（Please click the link→) :second-hand pipe mill
Product feature introduction
Economical and cost-effective
Firstly, the price of second-hand welded pipe machines is relatively low, which is their most intuitive advantage. For small and medium-sized enterprises, purchasing second-hand equipment can effectively reduce initial investment costs while ensuring the basic functions and production efficiency of the equipment. This makes second-hand square tube machines highly competitive and cost-effective in the market.
Multi functional and easy to maintain
Another major selling point of second-hand welded pipe machines is their versatility. After appropriate adjustments and maintenance, these machines can produce steel pipes of different specifications and shapes to meet diverse market demands. In addition, the maintenance cost of second-hand equipment is usually lower because at the time of purchase, suppliers often provide detailed usage records and maintenance guidelines for the equipment, making it easier for users to perform daily maintenance and repair minor faults.
The issue of 'non square' in the adjustment process
In the process of using a second-hand square tube machine to produce square and rectangular tubes, a common problem is the phenomenon of "square and rectangular tubes not being square". Specifically, this means that the produced square or rectangular pipes have uneven edges, angles, or lengths on each side, which can affect the quality and aesthetics of the product. The main reasons for this problem are improper machine tool parameter settings, roller wear, and differences in material quality.
Correction method of vertical roller
In order to solve the problem of "non square", the use of standing rollers is particularly important. Vertical roller is a tool used to adjust the shape of pipes. By setting the pressure and position of the vertical roller reasonably, the formed square tube can be calibrated to meet the standard requirements in terms of appearance. In the specific operation, the staff need to gradually adjust the angle and force of the vertical roller according to the actual deviation of the square tube, until the various dimensions of the square tube meet the standards.
Application scenarios and instance analysis
The second-hand welded pipe machine is not only suitable for standardized production, but also meets personalized customization needs. Taking construction sites and pipeline installation projects as examples, these fields often require steel pipes of different sizes and shapes. By adjusting the vertical rollers, the second-hand welded pipe machine can quickly produce square and rectangular pipes that meet specific requirements, greatly improving production efficiency and product quality.
Overall, second-hand square tube machines have become an ideal choice in the market due to their affordability, versatility, and ease of maintenance. By setting up and using vertical rollers reasonably, it is possible to effectively address the issue of "non square" in production and ensure product quality. These unique selling points not only make second-hand welded pipe machines shine in industrial manufacturing, but also bring significant economic benefits to enterprises.
For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier：www.usedpipemill.com
JinYuJie-Used Pipe Mills Supplier（Please click the link→) :second-hand pipe mill
Analysis of the problem of non squareness in the adjustment of square and rectangular tubes by second-hand square tube machines and the method of correcting vertical rollers
Innovation of intelligent heat treatment for welds: detailed explanation of online quenching+tempering (Q+T) technology
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Company address:No. A99, East Lecong Avenue, Lecong Town, Foshan City, Guangdong Province
Wechat: 13392281699
Email: zty@usedpipemill.com
Company address:No. A99, East Lecong Avenue, Lecong Town, Foshan City, Guangdong Province
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