Notes

Technology Of Seamless Steel Tube Production

Three-roll rolling tube billet should first, after the extrusion sizing examination, if there is no feedback after fracture on the surface of pipeline need to be cut after cutting machine, cutting expand about a meter of billet.And then go into the annealing process, annealing with acid pickling fluid, pickling when ought to take notice of whether there is a great deal of bubble surface, if there is a great deal of bubbles reveal that the quality of the steel tube can not meet the equivalent standards.Appearance on cool rolled seamless steel tube is much shorter in warm rolled smooth steel pipe, cool rolled smooth steel tube wall thickness typically smaller than hot rolled smooth steel tube, but the surface area looks brighter than the thick ASTM A106 seamless steel pipe, not a lot of harsh surface area, the diameter is not a great deal of burr.

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The delivery problem of warm rolled smooth steel tube is typically made after heat treatment.Hot-rolled smooth steel tube after QC must pass team rigorous hand-operated pick, after the top quality assessment for surface area covering of oil, and then complied with by cold illustration experiment lot of times, opening of the experiments performed after warm rolling processing, if the punched hole size is too big for aligning straightening.After straightening, the transmission tool is transmitted to the detector to carry out the examination, and after that the tag as well as the specification are put into the storehouse.


Circular tube billet and home heating to punch, three-roll skew rolling, rolling, or pressing - pipeline - sizing (or minimizing) - cooling down - correcting to hydrostatic test or inspection - &gt; tag, warehousing smooth steel tube is made from strong tube ingot or the opening capillary, after that through hot rolling as well as cool rolling or cold dial.The spec of seamless steel tube is indicated by the external diameter of the wall density millimeter.


Usually above 32 mm warm rolled seamless steel tube diameter, wall thickness 2.5 200 mm, to 6 mm cold rolled smooth steel tube diameter, wall density to 0.25 mm, to 5 mm thin wall surface pipe diameter density much less than 0.25 mm, chilly than warm rolled high dimensional accuracy.


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


tjdecho.com rolled, as the name suggests, the temperature of the rolling item is high, so the contortion resistance is tiny, can accomplish the large deformation quantity.Take the rolling system of steel plate as an instance, the density of the continual spreading billet is about 230mm, and the density is 1 ~ 20mm after roughing and rolling.At the exact same time, because the density of steel plate is smaller than tiny, the measurement accuracy demand is relatively low, home plate type issue is not easy to show up, the control convexity is offered top priority.


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