Machining and producing process of seamless steel pipe

Abstract

The invention discloses a machining and producing process of a seamless steel pipe. The machining and producing process includes the following steps that a steel pipe raw material is selected; pipe blank cut-off and stripping are conducted on the surface layer of the steel pipe material; the steel pipe material is heated; and high pressure water phosphorous removal, perforation, hole enlarging, hot extrusion, demolding, thermal treatment, steel tube saw cutting, cooling, secondary acid pickling, inspecting, coping, cold rolling, oil removal, secondary straightening and water pressure test crack detection are conducted. The machining and producing process of the seamless steel pipe is reasonable in flow design, high in machining work efficiency, high in workpiece deformation speed and capable of avoiding cracks generated in the inner surface and the outer surface.

Description

technical field [0001] The invention relates to the field of steel pipe processing, in particular to a seamless steel pipe processing production process. Background technique [0002] Seamless steel pipe is a long strip of steel without joints around it. It has a hollow cross section and is most widely used in oil pipelines. As a fluid conveying pipe, it can also be used as a general seamless pipe for conveying water, oil, gas and other fluids. In the boiler industry , The chemical industry is also widely used. At the same time, it is also often used in the fields of machinery and construction scaffolding. The seamless steel pipe is generally provided with a circular cross section inside, and also has a square or other special-shaped structure. [0003] The production of seamless steel pipes is generally divided into solid tube blanks, which are perforated, and then made into capillaries, which are made by hot rolling, cold rolling, and cold drawing. The existing seamless st...

AI Technical Summary

Problems solved by technology

[0003] The production of seamless steel pipes is generally divided into solid tube blanks, which are perforated, and then made into capillary tubes, which are made by hot rolling, cold rolling, and cold drawing. The existing seamless steel pipes have a high waste material rate during processing, which increases production costs and losses. , increasing the cost burden of the enterprise

Moreover, the finished product has low bending strength, and under heavy pressure, it is easy to cause tensile deformation of the steel pipe, which seriously affects the quality of later use