Production method of Ck20 rolled tube and improvement of surface hardness

- Jun 18, 2019-

The outer diameter of the Ck20 rolled tube is small and there is no welded seam. The pressure resistance during operation is high. The precision of the whole product can be produced in small batches. The cold drawn product of the whole product has high precision and good surface, and the performance of the rolling tube is good. More dense.


Rolling tube manufacturing method


Rolling pipes can be effectively divided into hot rolled pipes, cold rolled pipes, cold drawn pipes, extruded pipes, etc. when used according to different production methods.


Rolled tube hot rolled seamless tubes are generally produced on automatic rolling mill units. The solid tube blank is inspected and the surface defects are removed, cut into the required length, centered on the end face of the perforated end of the tube blank, then sent to a heating furnace for heating and perforated on the punching machine. At the same time, the perforation is continuously rotated and advanced. Under the action of the roll and the head, a cavity is gradually formed inside the tube blank, which is called a capillary tube. Then send it to the automatic pipe rolling machine to continue rolling. The uniform machine is uniform in wall thickness and sizing through the sizing machine to meet the specifications. It is a good method to produce hot-rolled seamless steel tubes by using continuous rolling mills.


The surface hardness of the rolling tube is increased, the surface hardness is increased by more than 50% during the operation, the processing precision: the processing precision can reach IT8 level, the surface roughness can reach Ra0.05-0.4μm, working environment: low noise, no pollution Save labor costs.