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Factors affecting the online bright heat treatment of stainless steel welded pipes made by high frequency welded pipe machine
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- Release time：2022-11-17 11:30
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【概要描述】High frequency welded pipe machine is widely used in the production of stainless steel welded pipes for large-scale power station generator sets. Most of the production of stainless steel welded pipes in my country is the introduction or use of advanced foreign equipment and technology.
Factors affecting the online bright heat treatment of stainless steel welded pipes made by high frequency welded pipe machine
【概要描述】High frequency welded pipe machine is widely used in the production of stainless steel welded pipes for large-scale power station generator sets. Most of the production of stainless steel welded pipes in my country is the introduction or use of advanced foreign equipment and technology.
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- Auth:
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- Release time：2022-11-17 11:30
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Detail
High frequency welded pipe machine is widely used in the production of stainless steel welded pipes for large-scale power station generator sets. Most of the production of stainless steel welded pipes in my country is the introduction or use of advanced foreign equipment and technology.
Heat treatment is an important process to ensure the performance of stainless steel welded pipes. One of its purposes is to eliminate the residual stress generated during the cold working process of coiling the stainless steel strip into a tube and the welding process. The second purpose is to perform solution treatment to make the welded steel pipe The carbides produced at this time are all solid-dissolved into austenite, and then quickly cooled down to prevent the austenite from precipitation or phase change during the cooling process. At present, continuous roller hearth furnaces are generally used in the heat treatment of stainless steel pipes using high frequency welded pipe machine in my country. Since no protective atmosphere is used, and producer gas is used as fuel, then pickling is used to remove the heat generated on the surface of the steel pipe after heat treatment. Oxide skin corrodes the steel pipe surface and causes environmental pollution. Some developed countries have now widely used online bright heat treatment technology. Since it can eliminate the traditional off-line heat treatment and pickling process, it has the advantages of increasing productivity and reducing labor intensity. Therefore, my country should vigorously promote the production of stainless steel welded pipes with protective atmosphere control. System development of bright heat treatment technology. The author analyzed some of the problems that occurred during the on-line bright heat treatment of the welded pipe production line introduced in my country, in order to improve the product quality and yield rate.
The factors that affect online bright heat treatment can be divided into six kinds.We introduce the influence of cooling temperature and the influence of welded pipe surface.
③The influence of cooling temperature
After the stainless steel welded pipe is heated to 1050 ～ 1150 ℃, the welded pipe should be quickly cooled down. On the one hand, it is ensured that the austenite does not precipitate during the cooling process. On the other hand, the temperature of the pipe will be Should be reduced to a temperature that does not oxidize. Therefore, the cooling temperature is very important, and the temperature range must be strictly controlled.
④The influence of welded pipe surface
The state of the surface of the stainless steel welded pipe before entering the furnace has a great influence on the bright heat treatment. If the surface of the welded pipe has moisture, grease and other dirt attached to the furnace, a light green oxide color will appear on the surface of the welded pipe after the bright heat treatment. Therefore, before entering the heat treatment furnace, the surface of the stainless steel welded pipe must be very clean, and no moisture is allowed on the surface of the welded pipe. If necessary, it can be dried in a dryer before entering the furnace.
The main factors affecting the on-line bright heat treatment of stainless steel welded pipe made by high frequency welded pipe machine are the influence of heat treatment temperature. ②The influence of protective gas. ③The influence of cooling temperature. ④The influence of welded pipe surface. ⑤The influence of heat treatment furnace sealing. ⑥The influence of other factors on bright heat treatment.
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For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier：www.usedpipemill.com
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1.Basic construction: A typical roller type bedroom spiral hoop usually consists of two sets of rollers that form a spiral shaped channel for guiding and supporting the metal strip.
2.Operation principle: When the metal strip passes through the looper, the strip is guided and supported in the spiral path. Due to the spiral structure of the looper, the strip can be smoothly transmitted under the condition of uneven strip speed to ensure the normal progress of the subsequent process.
3.Commissioning and maintenance: Used equipment needs to be inspected and maintained in detail before use. Includes:
Cleaning: Remove oil, dust and so on from the surface.
Lubrication: Check and add lubricating oil to ensure the normal operation of each transmission component.
Calibration: Ensure that the neutralization pressure of the roller is set correctly.
Replacement parts: Check for wear and replace necessary parts.
4.Application process: In the process of use, it is necessary to pay attention to the operation specifications, monitor the operating status of the equipment, and adjust the equipment parameters in time to meet the strip specifications and process requirements. In addition, it is also necessary to pay attention to safe operation to prevent accidents.
Through the above methods, the used roller bedroom spiral looper can continue to play its function and provide support for metal processing production.
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
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For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier：www.usedpipemill.com
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1.Molding die: used to shape steel strip into pipe. This type of mold usually consists of multiple sets of rollers, and the forming process is completed by gradual pressure.
2.Welding die: Specially used for high-frequency welding process to ensure the quality and accuracy of the weld. These molds are often used to ensure that the joint parts of the pipe are precisely aligned and soldered securely.
3.Sizing die: used for further sizing and straightening of the pipe after welding to ensure the dimensional accuracy of the final product. These molds allow the pipe to achieve the desired diameter and roundness.
4.Shaping mold: used to shape the welded pipe that has been formed to ensure that it meets the specified size and shape requirements.
5.Straightening mold: used to straighten the welded pipe and correct the bending and deformation of the pipe to ensure its flatness in the production process.
6.Surface treatment mold: These molds are used to treat the surface of the pipe, such as deburring, polishing, etc., to ensure the smooth and smooth surface of the pipe.
7.Cutting mold: used to cut the produced welded pipe to the required length according to demand. The main function of these molds is to ensure that the cutting is straight and high precision.
Each mold plays an important role in the production process, ensuring the quality and production efficiency of the welded pipe. According to the specific use and needs, different types of molds can be combined to achieve the best production results.
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
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In the early stages of roll forming technology, machining mainly relies on manual operation and simple mechanical devices. This kind of equipment has simple structure and is difficult to meet the production needs of complex profiles.
2.Mechanization improvement
With the advance of the Industrial Revolution, the degree of mechanization has gradually increased. Roller forming machines began to be equipped with electric motors and mechanical transmission systems, which increased production efficiency and output.
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In the late 20th century, the development of computer technology led to the introduction of automation and numerical control technology (CNC). CNC roller forming machine can realize high-precision and high-efficiency automatic processing through programming, reducing labor costs and improving product quality.
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For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier：www.usedpipemill.com
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1.Equipment procurement cost: The purchase price of second-hand equipment is usually lower than that of new equipment, but factors such as the service life, brand, model and functional perfection of the equipment need to be considered.
2.Transportation and installation costs: The cost of transporting the equipment from the place of purchase to the place of use and installing it, including handling, installation and calibration costs.
3.Maintenance and repair costs: Since the used equipment has been used, more maintenance and repair may be required. Therefore, regular maintenance costs and expected repair costs should be considered.
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5.Spare parts and consumables cost: Used equipment may require more frequent replacement of spare parts and consumables, which will also increase costs.
6.Upgrade and retrofit costs: In order to meet production needs, it may be necessary to upgrade or retrofit used equipment, and these costs need to be taken into account.
7.Warranty and after-sales service cost: Used equipment may have no warranty or a short warranty period, so after-sales service costs need to be taken into account.
In order to effectively control the cost of the second-hand pipe straightener, it is recommended to carry out a comprehensive cost accounting and benefit analysis, select the second-hand equipment with good reputation and good technical conditions, and do a detailed maintenance plan to extend the service life of the equipment and ensure its stable operation.
For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier：www.usedpipemill.com
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Wechat: 13392281699
Email: zty@usedpipemill.com
Company address:No. A99, East Lecong Avenue, Lecong Town, Foshan City, Guangdong Province
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