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Production method of hot-rolled seamless steel pipes

A technology of seamless steel pipe and production method, applied in the direction of metal rolling, etc., can solve the problems of high manufacturing cost per unit finished product, long sawing steel pipe head and tail, limited production capacity increase, etc., to improve production capacity, low manufacturing cost, and production capacity high effect

Inactive Publication Date: 2021-05-11
TAIYUAN HEAVY IND TECH IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The prior art seamless steel pipe manufacturing process has the following disadvantages in the entire manufacturing process from billet to finished product: ① due to the limitation of the production process, only single-length or shorter fixed-length double-length production can be realized; ② sawing The head and tail of the cut steel pipe are long, the metal consumption is large, and the finished product rate is low; ③The unit finished product manufacturing cost is high; ④The capacity increase is limited

Method used

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  • Production method of hot-rolled seamless steel pipes
  • Production method of hot-rolled seamless steel pipes

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Embodiment Construction

[0012] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0013] Such as figure 2 As shown, the production method of the hot-rolled seamless steel pipe of the present invention includes the following process steps: heating the billet in a heating furnace → using a piercer to perforate the billet into a capillary pipe → rolling pipe extension → fixed diameter reduction → hot sawing and cutting → cooling bed Cooling → ...

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Abstract

The invention discloses a production method of hot-rolled seamless steel pipes. The production method comprises the following steps: heating a steel billet in a heating furnace; perforating the steel billet into a hollow billet by using a perforating machine; rolling pipes and extending; sizing and reducing; thermally sawing and cutting; cooling by using a cooling bed; straightening by using a straightening machine; sawing the heads and the tails of the steel pipes to saw the steel pipes into required lengths; checking and accepting, and completing production of finished products of seamless steel pipes. According to the production method of the hot-rolled seamless steel pipes, the shortcomings and the defects that the hot-rolled seamless steel pipe manufacturing process in the prior art can only achieve single-length production, the production efficiency is low, the yield is low, and the productivity improvement of a production line is restricted are overcome; upgrading and transformation from single-length production to double-length or multi-length production are achieved; and the production method of the hot-rolled seamless steel pipes has the advantages of small cutting loss, high yield, low unit product manufacturing cost and high production line productivity.

Description

technical field [0001] The invention belongs to the technical field of metal thermal processing technology, and more specifically relates to a production method of a hot-rolled seamless steel pipe. Background technique [0002] The production of hot-rolled seamless steel pipes is generally divided into three steps: piercing, rolling, and diameter reduction, such as figure 1 As shown, the specific process steps include: heating the steel billet in the heating furnace → using a piercer to perforate the steel billet into a capillary tube → rolling the tube and extending it → sizing and reducing → cooling, straightening → sawing the head and tail of the steel pipe (sawing into the required length)→flaw detection, testing→measurement, marking→production of finished seamless steel pipes. [0003] The prior art seamless steel pipe manufacturing process has the following disadvantages in the entire manufacturing process from billet to finished product: ① due to the limitation of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B23/00
CPCB21B23/00
Inventor 李秀玲李安全张海啸
Owner TAIYUAN HEAVY IND TECH IND CO LTD
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