Production process of seamless steel pipe

Abstract

The invention discloses a production process of a seamless steel pipes; a walking beam furnace is adopted to heat a double-gauge pipe blank and heat the double-gauge pipe blank into a hot-state pipe blank; the hot-state pipe blank is sawed by a hot sawing machine and sawed into a plurality of sections of fixed-length pipe blanks; the fixed-length pipe blanks are respectively sent to two hot-rolledpipe production lines for piercing and rolling. According to the invention, the walking beam furnace and the hot sawing machine are combined to use; through using the advantages of small occupied area of the walking beam furnace, uniform pipe blank heating, double-gauge blank heating, large production capacity, easy hot charging and hot delivery and the like, the problems that the traditional annular heating furnace has large occupied area, fixed-size blank heating, limited production capacity and difficult hot charging and hot delivery are solved; and through using the advantages of energy saving, fast speed and accurate sizing of the large flywheel energy storage type hot saw machine, the sizing cutting of a high-temperature pipe blank is realized; the innovative mode that one walking beam furnace is matched with two continuous rolling pipe production lines is realized, so that the construction cost is greatly reduced, and the production efficiency of the steel pipe is improved.

Description

technical field [0001] The invention relates to the technical field of steel pipe production, in particular to a production process of seamless steel pipes. Background technique [0002] The production process of steel pipes at home and abroad is: cold cut-to-length round tube billet-heated cut-to-length billet in an annular heating furnace-single furnace and single line, and the mode in which one annular heating furnace corresponds to a pipe rolling production line is adopted. There are the problems that the annular heating furnace occupies a large area, the production capacity is low and the investment is large. The hot saws used in traditional thermal cutting have the problems of slow cutting time and low efficiency. The traditional single-furnace single-line mode after thermal sizing has the problems of long waiting time for production after cutting, large temperature drop of billets, and poor product quality. Contents of the invention [0003] In view of the above d...

AI Technical Summary

Problems solved by technology

There are problems that the annular heating furnace occupies a large area, low production capacity and large investment

The hot saw used in traditional thermal cutting has the problems of slow cutting time and low efficiency

The traditional single-furnace single-line mode after thermal sizing has the problems of long waiting time for production after cutting, large billet temperature drop, and poor product quality