Hot Rolling And Cold-rolling Of Seamless Steel Tubes

The seamless steel pipe is made of steel ingot or solid tube blank through perforation and then made by hot rolling, cold rolling or cold drawing. 45 seamless steel pipe is a kind of material in steel, which belongs to high quality carbon structural steel, a large number of The mold production company will use it to make mold steel. The seamless steel pipe is made of high-quality carbon steel or alloy steel and has hot rolling and cold rolling (extraction). Let the seamless steel pipe that has been processed into a product have a small tortuosity and have to rely on a mechanical straightening machine to complete. Therefore, in order to eliminate the twists and turns of seamless steel pipes, all seamless steel pipes are required to be cold-aligned.

The tortuosity of the seamless steel tube is due to improper adjustment of the rolling mill, residual residual stress during rolling and formation due to unequal cooling along the cross section and length of the pipe. Therefore, it is not possible to obtain a straight pipe directly from the rolling mill, as long as the tortuosity of the cold straightening pipe is sufficient to satisfy the rules of the skill condition.

The welded steel pipe is formed by welding a steel plate rolled into a tubular shape by a seam or a spiral seam. In terms of the manufacturing method, it is further divided into a spiral submerged arc pipe for low-pressure fluid transportation, a spiral-welded electric steel pipe, a direct-wound welded steel pipe, an electric welded pipe, and the like. Seamless steel tubes can be used in a variety of liquids, gas pipelines, and the like.

Welded pipes can be used for water pipes, gas pipes, heating pipes, etc. From the caliber,