News
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Microstructure and Properties of Hot-rolled Seamless Steel Pipe
At present, domestic steel producers face enormous challenges seamless steel overcapacity, have to adjust product structure, eliminate backward production capacity and research and development of high-quality products. Experimental studies have shown: the implementation of control of the cooling ...Read more -
Passivation Process of Spiral Pipe
Since the thicker parts formed on the surface, dense and complex components of the scale, such parts pickling descaling relatively complicated. Such removal of loose oxide scale according to a pickling step of removing ash hung performed. 1, Loose scale: 2, Pickling operation: after loose scale, ...Read more -
Straight Seam Steel Pipe Processing Methods
1. Steel casting: Use forging hammer the reciprocating impact force or press pressure to the billet into a pressure change we desired shape and dimensions plus work approach. 2. Kneading: the steel metal placed in closed kneading Jane, applying pressure at one end of the metal is extruded from th...Read more -
The Advantages of Spiral Pipe for Mining
The advantages of spiral pipe for mining are following below: 1, Closed strong, stiffness. 2, Good corrosion resistance and long service life. 3, Spiral bite from the rib effect, thereby improving the strength of the tube wall thickness can be reduced, reducing the cost of installation works. 4, ...Read more -
Cold Drawn Technology of Spiral Steel Pipe
Spiral steel pipe cold drawn, hot rolled tube defects, such as cracks or spiral steel high-precision cold drawn pipe after the tank, in the course of the fracture, almost no plastic deformation occurs, it is brittle fracture. Brittle fracture is caused by a variety of reasons. Such as: the precip...Read more -
There are spiral steel annealing process in use, mainly in the following three ways
1, To stress annealing Stress relief annealing, also known as low-temperature annealing (or tempering), which is mainly used to eliminate annealing casting, forging, welding, hot-rolled, cold-drawn pieces residual stress and the like. If not eliminate these stresses will cause the steel after a c...Read more
