Innovation Of Seamless Steel Tube Production

Three-roll rolling tube billet should initially, after the extrusion sizing test, if there is no response after split on the surface of pipe need to be reduced after cutting machine, reducing expand about a meter of billet.And then get in the annealing process, annealing with acid pickling fluid, pickling when ought to take notice of whether there is a lot of bubble surface area, if there is a lot of bubbles show that the top quality of the steel tube can not fulfill the equivalent standards.Appearance on chilly rolled smooth steel tube is much shorter in hot rolled seamless steel pipeline, chilly rolled smooth steel tube wall density generally smaller sized than warm rolled seamless steel tube, yet the surface looks brighter than the thick ASTM A106 smooth steel pipeline, not a lot of rough surface area, the diameter is not a great deal of burr.

The shipment problem of hot rolled smooth steel tube is normally made after warmth treatment.Hot-rolled seamless steel tube after QC need to pass personnel stringent manual choice, after the quality examination for surface area finish of oil, and afterwards complied with by cold illustration experiment lot of times, opening of the experiments performed after hot rolling processing, if the punched opening size is also huge for correcting straightening.After straightening, the transmission tool is transmitted to the detector to accomplish the examination, and afterwards the tag and also the specification are taken into the stockroom.

Circular tube billet as well as home heating to punch, three-roll skew rolling, rolling, or pressing - pipe - sizing (or reducing) - cooling - correcting to hydrostatic test or assessment - > tag, warehousing seamless steel tube is made from strong tube ingot or the perforation blood vessel, then with hot rolling as well as chilly rolling or cool dial.The spec of smooth steel tube is indicated by the external size of the wall surface thickness millimeter.

Usually above 32 mm hot rolled smooth steel tube diameter, wall surface density 2.5 200 mm, to 6 mm cool rolled smooth steel tube size, wall surface density to 0.25 mm, to 5 mm thin wall pipeline diameter thickness much less than 0.25 mm, cool than hot rolled high dimensional accuracy.

It is generally made from the excellent quality carbon steel, such as 10, 20, 30, 35, 45, etc., such as reduced alloy steel, such as 16Mn, 5MnV, steel tube and so on, etc., which are constructed from hot rolled or cold rolled steel, such as 40Cr, 30CrMnSi, 45Mn2, 40MnB, etc.The seamless pipe made by reduced carbon steel, such as 10 and also 20, is mainly utilized for circulation pipe.The smooth job of medium carbon steel such as 45 as well as 40Cr is utilized to make mechanical components, such as vehicle as well as tractor parts.Generally make use of smooth steel tube to ensure toughness and also flattening test.Hot rolled steel pipe in hot rolled state or warm treatment.Cold rolled with heat treatment.

Hot rolled, as the name implies, the temperature level of the rolling piece is high, so the deformation resistance is tiny, can accomplish the huge deformation quantity.Take the moving system of steel plate as an example, steel sheet the thickness of the continual spreading billet has to do with 230mm, and the density is 1 ~ 20mm after roughing as well as rolling.At the same time, since the density of steel plate is smaller sized than little, the dimension precision requirement is relatively low, home plate kind issue is challenging to appear, the control convexity is provided priority.

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