Innovation Of Seamless Steel Tube Production
alloy sheet manufacturer -roll rolling tube billet need to initially, after the extrusion sizing test, if there is no response after crack externally of pipe have to be cut after reducing machine, reducing expand concerning a meter of billet.And after that enter the annealing process, annealing with acid pickling fluid, marinading when need to pay attention to whether there is a great deal of bubble surface area, if there is a lot of bubbles show that the high quality of the steel tube can not fulfill the equivalent standards.Appearance on cold rolled seamless steel tube is shorter in hot rolled smooth steel pipe, cold rolled seamless steel tube wall surface thickness normally smaller than warm rolled seamless steel tube, however the surface area looks brighter than the thick ASTM A106 seamless steel pipeline, not a great deal of harsh surface, the size is not a lot of burr.
steel tube China of hot rolled seamless steel tube is typically made after warmth treatment.Hot-rolled smooth steel tube after QC must pass staff stringent manual pick, after the quality assessment for surface area layer of oil, and after that followed by cold illustration experiment often times, opening of the experiments conducted after hot rolling processing, if the punched opening size is as well large for correcting straightening.After straightening, the transmission gadget is transmitted to the detector to execute the test, and after that the tag as well as the spec are put into the storage facility.
Circular tube billet and home heating to punch, three-roll alter rolling, rolling, or pressing - pipeline - sizing (or decreasing) - cooling - aligning to hydrostatic examination or inspection - > tag, warehousing smooth steel tube is made from solid tube ingot or the perforation capillary, then through warm rolling and also cold rolling or cold dial.The spec of seamless steel tube is shown by the outer diameter of the wall surface density millimeter.
Normally above 32 mm hot rolled smooth steel tube size, wall density 2.5 200 mm, to 6 mm chilly rolled seamless steel tube diameter, wall thickness to 0.25 mm, to 5 mm slim wall pipe size density less than 0.25 mm, chilly than hot rolled high dimensional precision.
It is typically made from the premium quality carbon steel, such as 10, 20, 30, 35, 45, etc., such as low alloy steel, such as 16Mn, 5MnV, and so on, etc., which are made from hot rolled or chilly rolled steel, such as 40Cr, 30CrMnSi, 45Mn2, 40MnB, etc.The seamless pipeline made by low carbon steel, such as 10 as well as 20, is mainly used for circulation pipe.The smooth job of tool carbon steel such as 45 and also 40Cr is made use of to make mechanical parts, such as cars and truck and also tractor parts.Generally utilize smooth steel tube to ensure strength and also squashing test.Hot rolled steel pipe in warm rolled state or heat treatment.Cold rolled with warmth treatment.
Hot rolled, as the name implies, the temperature level of the rolling piece is high, so the contortion resistance is tiny, can achieve the big contortion quantity.Take the rolling system of steel plate as an example, 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, since the thickness of steel plate is smaller sized than tiny, the dimension precision requirement is reasonably reduced, the plate type problem is hard to show up, the control convexity is given top priority.