The delivery problem of hot rolled seamless steel tube is usually made after warm treatment.Hot-rolled seamless steel tube after QC need to pass personnel rigorous hands-on pick, after the top quality inspection for surface area layer of oil, and afterwards followed by cold illustration experiment sometimes, opening of the experiments conducted after warm rolling processing, if the punched hole size is as well huge for straightening out straightening.After straightening, the transmission gadget is sent to the detector to accomplish the test, and after that the label as well as the spec are taken into the warehouse.
Circular tube billet and heating to punch, three-roll skew rolling, rolling, or pushing - pipeline - sizing (or minimizing) - cooling - aligning to hydrostatic examination or evaluation - > tag, warehousing seamless steel tube is made from solid tube ingot or the opening blood vessel, after that via hot rolling as well as cold rolling or cold dial.The specification of seamless steel tube is shown by the outer diameter of the wall surface density millimeter.
Typically higher than 32 mm hot rolled smooth steel tube diameter, wall density 2.5 200 mm, to 6 mm cool rolled smooth steel tube size, wall thickness to 0.25 mm, to 5 mm slim wall pipe size thickness less than 0.25 mm, cool than hot rolled high dimensional precision.
It is generally made from the top quality carbon steel, such as 10, 20, 30, 35, 45, etc., such as low alloy steel, such as 16Mn, 5MnV, etc., and so on, which are constructed from hot rolled or cold rolled steel, such as 40Cr, 30CrMnSi, 45Mn2, 40MnB, etc.The smooth pipe made by low carbon steel, such as 10 and also 20, is generally used for circulation pipe.The seamless job of tool carbon steel such as 45 and also 40Cr is utilized to make mechanical components, such as automobile and tractor parts.Generally make use of smooth steel tube to guarantee strength and also squashing test.Hot rolled steel pipe in hot rolled state or warmth treatment.Cold rolled with warmth therapy.
Tianjin Decho International Trade Co., Ltdrolled, as the name suggests, the temperature of the rolling piece is high, so the contortion resistance is little, can attain the huge contortion quantity.Take the moving system of steel plate as an example, the density of the constant casting billet is about 230mm, and the density is 1 ~ 20mm after roughing as well as rolling.At the very same time, because the density of steel plate is smaller than small, the dimension precision requirement is fairly low, the plate kind problem is difficult to appear, the control convexity is provided concern.
