Notes

Modern Technology Of Seamless Steel Tube Manufacturing

https://www.tjdecho.com -roll rolling tube billet must first, after the extrusion sizing examination, if there is no response after split on the surface of pipe have to be reduced after cutting equipment, reducing grow regarding a meter of billet.And then get in the annealing procedure, annealing with acid pickling liquid, marinading when should take notice of whether there is a lot of bubble surface area, if there is a lot of bubbles reveal that the quality of the steel tube can not meet the corresponding standards.Appearance on cool rolled seamless steel tube is much shorter in hot rolled smooth steel pipeline, cold rolled seamless steel tube wall surface density usually smaller than warm rolled seamless steel tube, but the surface looks brighter than the thick ASTM A106 seamless steel pipeline, not a lot of rough surface, the diameter is not a lot of burr.


The delivery problem of warm rolled smooth steel tube is generally made after heat treatment.Hot-rolled smooth steel tube after QC ought to pass team stringent hands-on pick, after the quality inspection for surface finishing of oil, and then complied with by chilly illustration experiment sometimes, perforation of the experiments performed after warm rolling handling, if the punched opening diameter is as well large for correcting the alignment of straightening.After straightening, the transmission gadget is transmitted to the detector to carry out the test, and then the label and also the spec are put into the stockroom.


Circular tube billet and heating to punch, three-roll skew rolling, rolling, or pushing - pipe - sizing (or minimizing) - cooling - straightening to hydrostatic examination or assessment - > tag, warehousing seamless steel tube is made from solid tube ingot or the perforation vein, then with hot rolling and also chilly rolling or cool dial.The spec of seamless steel tube is shown by the external size of the wall density millimeter.


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


It is normally made from the high quality carbon steel, such as 10, 20, 30, 35, 45, etc., such as low alloy steel, such as 16Mn, 5MnV, etc., etc., which are made from hot rolled or cool rolled steel, such as 40Cr, 30CrMnSi, 45Mn2, 40MnB, etc.The seamless pipeline made by low carbon steel, such as 10 and 20, is generally made use of for flow pipe.The smooth job of medium carbon steel such as 45 as well as 40Cr is used to make mechanical components, such as car as well as tractor parts.Generally make use of seamless steel tube to guarantee toughness as well as flattening test.Hot rolled steel pipeline in hot rolled state or heat treatment.Cold rolled with warmth therapy.


Hot rolled, as the name suggests, the temperature of the rolling piece is high, so the contortion resistance is tiny, can accomplish the big deformation quantity.Take the rolling system of steel plate as an instance, the thickness of the continual spreading billet is about 230mm, and the density is 1 ~ 20mm after roughing as well as rolling.At the same time, because the thickness of steel plate is smaller sized than small, the dimension accuracy requirement is fairly low, the plate kind issue is not easy to appear, the control convexity is given concern.


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