How does the precision steel tube processing process and manufacturing process steps proceed?
The production process of general precision tubes can be divided into two types: cold drawing and hot rolling. The production process of cold rolling precision tubes is generally more complicated than hot rolling. Test, if the surface does not respond to cracks, the round pipe is cut by a cutter to cut into a blank of about one meter in length. Then enter the annealing process. Annealing should be acid pickled with an acidic liquid. When pickling, pay attention to whether there is a large amount of blistering on the surface. If there is a large amount of blistering, the quality of the steel pipe cannot meet the response standard.
The appearance of cold-rolled precision tubes is shorter than that of hot-rolled precision tubes. The thickness of cold-rolled precision tubes is generally smaller than that of hot-rolled precision tubes, but the surface looks brighter than thick-walled precision tubes. The surface does not have much roughness. There are not too many glitches. The delivery state of hot-rolled precision tubes is generally the hot-rolled state after heat treatment. After the quality inspection, the hot-rolled precision tubes must be carefully selected by the staff. After the quality inspection, the surface is oiled, and then multiple cold-drawing experiments are performed. After the hot-rolling treatment, the perforation experiment is performed. If the perforation is too large, straightening is required. After straightening, it is transferred to the flaw detector by the conveying device for flaw detection experiments. Finally, the labels are labeled and the specifications are arranged and placed in the warehouse.
Hot-rolled round pipe billet → heating → perforation → three-roll diagonal rolling, continuous rolling or extrusion → stripping → sizing (or reducing) → cooling → straightening → hydraulic test (or flaw detection) → marking → storage precision The tube is made of steel ingots or solid tube blanks through perforation to make capillary tubes, and then made by hot rolling, cold rolling or cold drawing. The specifications of precision tubes are expressed in millimeters of outer diameter * wall thickness. Precision tubes are divided into hot rolled and cold rolled (dial) precision tubes.
Hot-rolled precision pipes are divided into general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, geological steel pipes and other steel pipes. Cold rolled (dial) precision tubes include general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, and other steel pipes, as well as carbon thin-walled steel pipes, alloy thin-walled steel pipes, Rusty thin-walled steel pipes and special-shaped steel pipes. The outer diameter of hot-rolled seamless pipe is generally greater than 32mm, the wall thickness is 2.5-200mm, the diameter of cold-rolled precision pipe can reach 6mm, the wall thickness can reach 0.25mm, the outer diameter of thin-walled pipe can reach 5mm, and the wall thickness is less than 0.25mm. Higher precision than hot rolled dimensions.