As the molding process of stainless steel welded pipe becomes more and more mature, many places that need to use stainless steel pipes have begun to slowly change from the original stainless steel seamless pipe to stainless steel welded pipe, the advantage of this is to reduce manufacturing costs for production enterprises, improve market competitiveness, and also allow downstream end customers to buy the products they need at a lower price.
Although stainless steel welded pipe has a variety of different advantages, but due to technical parameters or material requirements need to be optimized, some important areas still have to continue to use fine rolled pipe. For example, automobiles, motorcycles, electric vehicles, pneumatic cylinders, petrochemical, electric power, ships, aerospace, bearings, pneumatic components, low-pressure boilers and other fields.
What is finishing pipe?
Fine rolled pipe is one of the important processes for the production of seamless steel pipe, the production process does not heat up the base material, directly through the cold processing of the mill to achieve continuous tensile forming of the base material, and finally make a seamless steel pipe that meets the requirements, so we usually call the fine rolled pipe or fine drawn pipe collectively called cold rolled pipe and cold drawn pipe. The corresponding process is also called cold rolling (similar to cold rolling in the steel process).
What are the irreplaceable advantages of finishing rolled pipe?
1, based on the advantages of the cold rolling process, the dimensional accuracy of the fine rolled pipe is particularly high, the tolerance can be controlled within 0.05mm, and the finish of the internal and external walls is good, there will be no oxide layer.
2, excellent processing performance, because there are no gaps inside and outside the pipe, the entire finishing rolled pipe can withstand high pressure, even in the face of complex mechanical processing or deformation treatment can not crack, no wrinkle. Such as cold bending, flaring, flattening and so on.
3, the promotion and application of precision seamless pipe can save steel, improve processing efficiency, reduce processing processes and equipment investment, can save costs and greatly save machining hours, improve production and material utilization, while helping to improve product quality and reduce costs.
What are the limitations of finishing tubes?
1, the inevitable problem of the cold rolling process is that the internal stress will be generated during the rolling process, and the overall and local buckling strength of the fine rolled tube will be different.
2, the free torsional rigidity of the section is relatively low, and the processing is difficult.
3. The forming wall thickness of the cold-rolled finishing pipe is small, and the carrying capacity of the local concentrated load is insufficient.
Every time the finishing tube is rolled, it must go through the process of solution treatment. Ta ensure that the performance of the steel pipe meets the technical requirements. and to provide guarantee for the post-process processing or use. Bright solution treatment process of ultra-long seamless steel pipe has always been a difficulty in the industry.
Traditional electric furnace equipment is large,covers a large area, has high energy consumption and large gas consumption, so it is difficult for realize bright solution process. After years of hard work and innovative development, the use of current advanced induction heating technology and DSP power supply. Precision control of heating temperature to ensure that the temperature is controlled within t2C,to solve the technical problem of inaccurate induction heating temperature control. The heated steel pipe is cooled by "heat conduction"in a special closed cooling tunnel, which greatly reduces the gas consumption and is more environmentally friendly.
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