Innovation Of Seamless Steel Tube Production
Three-roll rolling tube billet need to first, after the extrusion sizing examination, if there is no reaction after crack on the surface of pipe have to be reduced after reducing machine, reducing grow regarding a meter of billet.And after that get in the annealing process, annealing with acid pickling liquid, pickling when need to focus on whether there is a lot of bubble surface area, if there is a great deal of bubbles show that the high quality of the steel tube can not meet the matching standards.Appearance on chilly rolled smooth steel tube is much shorter in warm rolled smooth steel pipeline, chilly rolled smooth steel tube wall surface thickness normally smaller sized than warm rolled smooth steel tube, however the surface area looks brighter than the thick ASTM A106 seamless steel pipeline, not a lot of rough surface, the diameter is not a great deal of burr.
The shipment condition of hot rolled seamless steel tube is generally made after warmth treatment.Hot-rolled smooth steel tube after QC should pass personnel rigorous hand-operated choice, after the high quality examination for surface covering of oil, and then adhered to by cool illustration experiment sometimes, opening of the experiments conducted after hot rolling processing, if the punched opening size is also big for aligning straightening.After straightening, the transmission gadget is transmitted to the detector to perform the examination, and afterwards the tag as well as the spec 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 minimizing) - cooling - aligning to hydrostatic test or evaluation - > tag, warehousing smooth steel tube is made from strong tube ingot or the perforation capillary, then with warm rolling and also cold rolling or chilly dial.The spec of seamless steel tube is suggested by the outer size of the wall density millimeter.
Typically more than steel rod rolled smooth steel tube size, wall surface density 2.5 200 mm, to 6 mm cool rolled seamless steel tube diameter, wall thickness to 0.25 mm, to 5 mm slim wall pipeline size thickness less than 0.25 mm, chilly than warm rolled high dimensional accuracy.
It is usually made from the premium quality carbon steel, such as 10, 20, 30, 35, 45, etc., such as reduced alloy steel, such as 16Mn, 5MnV, and so on, etc., which are made of hot rolled or chilly rolled steel, such as 40Cr, 30CrMnSi, 45Mn2, 40MnB, etc.The seamless pipeline made by low carbon steel, such as 10 and also 20, is generally made use of for flow pipe.The smooth job of medium carbon steel such as 45 and also 40Cr is utilized to make mechanical parts, such as vehicle and also tractor parts.Generally utilize smooth steel tube to make sure stamina and flattening test.Hot rolled steel pipeline in hot rolled state or heat treatment.Cold rolled with heat therapy.
Warm rolled, as the name suggests, the temperature level of the rolling piece is high, so the deformation resistance is small, can achieve the big contortion quantity.Take the moving system of steel plate as an instance, the thickness of the continual spreading billet has to do with 230mm, and also the thickness is 1 ~ 20mm after roughing and also rolling.At the very same time, because the density of steel plate is smaller than small, the measurement accuracy demand is reasonably reduced, the plate kind trouble is challenging to show up, the control convexity is given priority.
