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Home » Defect Analysis of High-precision Cold Drawn Seamless Steel Pipe
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Defect Analysis of High-precision Cold Drawn Seamless Steel Pipe

Defect Analysis of High-precision Cold Drawn Seamless Steel Pipe
November 18, 2020
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Analysis of quality defects on the inner and outer surface of high-precision cold drawn seamless steel pipe:

Cold drawn seamless steel pipes have the characteristics of no oxide layer on the inner and outer walls, no leakage under high pressure, high precision, high finish, no deformation when cold bending, no cracks in flaring and flattening, and anti-rust treatment on the surface. They are mainly used for mechanical structures, Hydraulic equipment and pneumatic or hydraulic components of automobiles and motorcycles.

The industrial control of the production of cold-drawn seamless steel pipes includes mold design, annealing, pickling, lubrication and other conditions. At the same time, it is necessary to do a good job in capillary quality inspection and renovation.

Cold drawn seamless steel pipes are prone to some defects in the production process, which will directly lead to the performance requirements of cold drawn seamless steel pipes, and even produce certain risks during use, such as: cracks, internal Folding, external folding, crushing, separation, scarring, concave pulling, convex hull, etc. Therefore, these defects must be avoided in the production process of cold drawn seamless steel pipes.
Cause:
① Due to surface defects or internal defects of cold drawn seamless steel tube blanks.
② Produced in the production process, such as incorrect design of rolling process parameters, unsmooth mold surface, poor lubrication conditions, unreasonable pass design and adjustment.
③In the process of heating, rolling, heat treatment and straightening of the tube blank (cold drawn seamless steel pipe), if the heating temperature is not properly controlled, the deformation is uneven, the heating and cooling rate is unreasonable or the straightening deformation is too large. Residual stress may also cause surface cracks in cold drawn seamless steel pipes.
  
There are many reasons for the defects of cold drawn seamless steel pipes in the production process, which have a very large impact on the performance of cold drawn seamless steel pipes. Therefore, cold drawn seamless steel pipe manufacturers must avoid these situations during the production process.

High-precision cold-drawn precision steel pipe is a new type of high-tech energy-saving product. , The popularization and application of high-precision cold-drawn precision steel pipes can save steel, improve processing efficiency, and save energy. The so-called high-precision cold-drawn seamless steel pipe refers to strict inner and outer diameter dimensional accuracy (tolerance range), inner and outer surface smoothness, roundness, straightness The characteristics of good temperature and uniform wall thickness.

https://www.permanentsteel.com/newsshow/defects-that-may-occur-in-the-production-of-hot-rolled-seamless-steel-pipes.html
Submit your logistics, material handling, or supply chain related company news in Supply Chain Quarterly's's Industry Press Room section or New Products section
Manufacturing Oil Technology
KEYWORDS Permanent Steel Manufacturing Co.,Ltd
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