Innovation Of Seamless Steel Tube Production

Three-roll rolling tube billet have to initially, after the extrusion sizing test, if there is no feedback after fracture on the surface of pipeline have to be cut after cutting maker, reducing expand concerning a meter of billet.And then enter the annealing process, annealing with acid pickling liquid, marinading when need to focus on whether there is a lot of bubble surface, if there is a lot of bubbles reveal that the top quality of the steel tube can not satisfy the matching standards.Appearance on cold rolled seamless steel tube is shorter in hot rolled seamless steel pipeline, chilly rolled smooth steel tube wall thickness normally smaller sized than warm rolled seamless steel tube , yet the surface looks brighter than the thick ASTM A106 smooth steel pipeline, not a lot of harsh surface area, the diameter is not a great deal of burr.

<img width="474" src="http://www.steelpipes.org/gavin/uploads/allimg/190207/220HT160-0.jpg" />

The delivery condition of warm rolled seamless steel tube is generally made after warm treatment.Hot-rolled seamless steel tube after QC must pass personnel stringent hand-operated pick, after the high quality evaluation for surface area finish of oil, and then complied with by chilly illustration experiment sometimes, opening of the experiments conducted after warm rolling handling, if the punched hole size is too large for straightening out straightening.After straightening, the transmission gadget is sent to the detector to perform the test, and afterwards the tag and the spec are put into the storehouse.

Circular tube billet as well as heating to punch, three-roll skew rolling, rolling, or pushing - pipeline - sizing (or minimizing) - cooling - straightening out to hydrostatic examination or inspection - &gt; tag, warehousing seamless steel tube is made from solid tube ingot or the opening capillary, then with hot rolling and also cold rolling or cold dial.The spec of smooth steel tube is indicated by the outer size of the wall surface density millimeter.

Typically higher than 32 mm hot rolled seamless 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 density 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, and so on, and so on, which are constructed from warm 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 seamless job of medium carbon steel such as 45 as well as 40Cr is utilized to make mechanical parts, such as automobile as well as tractor parts.Generally make use of smooth steel tube to ensure toughness as well as flattening test.Hot rolled steel pipeline in warm rolled state or warmth treatment.Cold rolled with heat therapy.

Hot rolled, as the name implies, the temperature of the rolling item is high, so the deformation resistance is tiny, can achieve the big contortion quantity.Take the moving system of steel plate as an example, the density of the constant casting billet is about 230mm, as well as the density is 1 ~ 20mm after roughing and rolling.At the very same time, due to the fact that the density of steel plate is smaller sized than small, the measurement precision requirement is fairly low, the plate kind trouble is challenging to show up, the control convexity is offered priority.