16Mn seamless pipe process
2014-07-09
6Mn seamless pipes are generally produced on automatic pipe rolling mills. The solid pipe blanks are inspected and surface defects are removed, then cut to the required length. The end face of the pipe blank is centered at the perforation end, and then sent to the heating furnace for heating, followed by perforation on the perforating machine. During perforation, it continuously rotates and advances, and under the action of rollers and mandrels, a cavity gradually forms inside the pipe blank, called a green tube. It is then sent to an automatic pipe rolling mill for further rolling. Finally, it is equalized in wall thickness by an equalizing machine and sized by a sizing machine to meet specification requirements. Using continuous pipe rolling mills to produce hot-rolled seamless steel pipes is a more advanced method.
1.2 If smaller dimensions and better quality seamless pipes are desired, cold rolling, cold drawing or a combination of both methods must be used. Cold rolling is usually carried out on two-roll mills, where steel pipes are rolled in an annular hole formed by variable cross-section round hole grooves and stationary conical mandrels. Cold drawing is usually performed on single-chain or double-chain cold drawing machines with capacities ranging from 0.5 to 100 tons.
1.3 The extrusion method involves placing heated pipe blanks inside a closed extrusion cylinder, where the perforating rod moves together with the extrusion rod to extrude the extruded piece from a smaller die hole. This method can produce steel pipes with smaller diameters.
Shenyang Tengfei Iron Corporation
Shenyang Tengfei Steel Pipe Co., Ltd.
Address: No.6 A 3, No.13 Road, Economic and Technological Development Zone, Shenyang City, Liaoning Province
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