Technology Of Seamless Steel Tube Production
Three-roll rolling tube billet have to first, after the extrusion sizing examination, if there is no feedback after fracture on the surface of pipe have to be cut after reducing machine, reducing grow regarding a meter of billet.And then get in the annealing procedure, annealing with acid pickling fluid, marinading when need to focus on whether there is a great deal of bubble surface, if there is a lot of bubbles reveal that the quality of the steel tube can not fulfill the corresponding standards.Appearance on cool rolled smooth steel tube is shorter in hot rolled smooth steel pipe, chilly rolled seamless steel tube wall surface thickness typically smaller than warm rolled smooth steel tube, but the surface area looks brighter than the thick ASTM A106 seamless steel pipe, not a lot of rough surface, the size is not a lot of burr.
The distribution problem of warm rolled smooth steel tube is usually made after warm treatment.Hot-rolled seamless steel tube after QC should pass staff rigorous hands-on pick, after the quality evaluation for surface coating of oil, and after that complied with by chilly drawing experiment often times, opening of the experiments performed after hot rolling handling, if the punched hole diameter is also huge for straightening straightening.After straightening, the transmission tool is transferred to the detector to accomplish the examination, and after that the label and also the requirements are put into the stockroom.
Round tube billet and home heating to punch, three-roll alter rolling, rolling, or pushing - pipeline - sizing (or minimizing) - cooling - correcting to hydrostatic test or examination - > tag, warehousing smooth steel tube is made from strong tube ingot or the opening blood vessel, then through hot rolling as well as cold rolling or chilly dial.The requirements of smooth steel tube is shown by the outer diameter of the wall surface thickness millimeter.
Generally above website link rolled smooth steel tube diameter, wall surface thickness 2.5 200 mm, to 6 mm cool rolled seamless steel tube diameter, wall surface thickness to 0.25 mm, to 5 mm slim wall pipe size thickness less than 0.25 mm, cool than warm rolled high dimensional precision.
It is typically made from the top quality carbon steel, such as 10, 20, 30, 35, 45, and so on, such as reduced alloy steel, such as 16Mn, 5MnV, etc., etc., which are constructed from hot rolled or chilly rolled steel, such as 40Cr, 30CrMnSi, 45Mn2, 40MnB, etc.The smooth pipe made by reduced carbon steel, such as 10 and also 20, is mainly utilized for flow pipe.The smooth work of tool carbon steel such as 45 as well as 40Cr is used to make mechanical parts, such as car and also tractor parts.Generally use smooth steel tube to guarantee strength and squashing test.Hot rolled steel pipe in hot rolled state or warmth treatment.Cold rolled with warm therapy.
Warm rolled, as the name suggests, the temperature of the rolling item is high, so the contortion resistance is small, can accomplish the large deformation quantity.Take the moving system of steel plate as an instance, the thickness of the continuous casting billet is about 230mm, and the thickness is 1 ~ 20mm after roughing and rolling.At the exact same time, because the density of steel plate is smaller sized than little, the dimension precision demand is reasonably reduced, the plate kind trouble is not easy to show up, the control convexity is offered top priority.