Production process of precision seamless steel tubes

Abstract

The invention relates to a production process of precision seamless steel tubes. The production process includes the following steps of feeding, wherein steel tube raw materials are pushed into a pushing machine; heating, wherein steel tube blanks are heated through a natural gas hot blast furnace, and the heating temperature is 1,180-1,200 DEG C; punch-forming, wherein the steel pipe blanks are punched through a punching machine, and steel tubes are obtained; finish rolling, wherein the steel tubes are rolled through a three-roller finish rolling machine, and the sizes of the internal diameters and the external diameters of the steel tubes are machined into designated sizes; quenching, wherein water serves as a quenching medium, the water temperature is 20-40 DEG C, and the temperatures of the quenched steel tubes are 830-850 DEG C; tempering, wherein the steel tubes are fed into a tempering furnace, the tempering temperature is 550-620 DEG C, and the time is 20-30 min; and straightening, wherein the steel tubes are straightened through a straightener. Diameter reducing and wall thickening of the seamless steel tubes are achieved in the finish rolling production procedure of the process, the production process is suitable for the steel tube blanks and waste steel tubes, and stable mechanical performance and better treatment smoothness are achieved; and compared with the existing seamless steel tubes, the precision seamless steel tubes are more durable, the hardness, plasticity and toughness are all improved, and machining is better facilitated.

Description

technical field [0001] The invention relates to the technical field of steel pipe processing, in particular to a precision seamless steel pipe production process. Background technique [0002] The traditional seamless steel pipe production process generally produces round steel billets, which are not suitable for direct transformation on seamless steel pipes, resulting in high production costs, and some waste seamless steel pipes have low value and cannot be used as products again. . Contents of the invention [0003] In order to solve the deficiencies in the prior art, the object of the present invention is to provide a precision seamless steel pipe production process. [0004] The technical solution adopted by the present invention to solve its technical problems is: [0005] A precision seamless steel pipe production process is characterized in that it comprises the following steps: [0006] Model classification: sorted according to the size of the steel pipe blank; ...

AI Technical Summary

Problems solved by technology

[0002] The traditional seamless steel pipe production process is generally produced for round steel blanks, which is not suitable for direct transformation on seamless steel pipes, resulting in high production costs, and some waste seamless steel pipes have low value and cannot be used as normal products again.