Manufacturing method of small-caliber steel pipe

A manufacturing method and small-caliber technology, which are used in manufacturing tools, metal rolling, metal rolling, etc., can solve the problems of uncontrollable cooling methods, unstable mechanical properties, and increase the size of the cooling bed, so as to avoid the phenomenon of mixed crystals. , to avoid unstable mechanical properties and improve performance

Pending Publication Date: 2022-05-17
CISDI ENG CO LTD +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The core equipment to realize the steel pipe production process includes piercing machine, pipe rolling mill and sizing and reducing machine. Among them, the sizing and reducing machine is the finishing rolling equipment in the seamless steel pipe production line, which is to expand the range of product specifications and improve the dimensional accuracy of the rolling mill , head and tail dimensional tolerance, an ideal production equipment, however, after the production of the sizing and reducing unit, the steel pipes are air-cooled on the cooling bed, so as to realize the organizational transformation and subsequent row sawing, straightening, pipe flaw detection, collection and bundling In order to improve the hourly output and production efficiency of steel pipes, domestic steel pipe factories, especially small-diameter steel pipes with a size of 180mm and below, adopt the production method of increasing the size of the cooling bed and increasing the cooling time of the cooling bed. After the cooling method and the phenomenon of unstable mechanical properties

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Manufacturing method of small-caliber steel pipe
  • Manufacturing method of small-caliber steel pipe
  • Manufacturing method of small-caliber steel pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0061] refer to figure 2 , image 3 , Fig. 4, according to the present invention, the production process production code is the small-diameter steel pipe of J55, and its sequence includes: annular heating furnace 1, piercer 2, brushing station 3, high-pressure water descaling device 4 before continuous rolling, continuous rolling pipe Machine 5, Tube removing machine 6, Induction heating device 7, High-pressure water descaling device before fixed diameter reduction 8, Fixed diameter reduction unit 9, Water cooling device between racks 10, Straight roller table after fixed diameter reduction unit 11, Fixed reduction The rear transition roller table 12 of the sizing unit, the rear rotating roller table 13 of the sizing and reducing unit, the water cooling device 14 after the sizing and reducing unit, the cooling bed 15, and the collection system 16. The process is as follows:

[0062] 1) Ring heating furnace heating

[0063] The Ф210mm billet is heated to 1050°C~1250°C by walk...

Embodiment 3

[0099] refer to figure 2 , image 3 , according to this embodiment, the production process sequence includes: annular heating furnace 1, piercer 2, brushing station 3, high-pressure water descaling device before continuous rolling 4, continuous rolling mill 5, pipe removing machine 6, induction heating device 7 , High-pressure water descaling device before fixed diameter reduction 8, fixed diameter reduction unit 9, inter-frame water cooling device 10, water cooling device after fixed diameter reduction unit 11, straight roller table after fixed diameter reduction unit 12, rear fixed diameter reduction unit Transition roller table 13, rotary roller table 14, cooling bed 15 after sizing and reducing unit. The process is as follows:

[0100] 1) Ring heating furnace heating

[0101] The Ф210mm billet is heated to 1050°C~1250°C by walking beam type annular heating furnace, and kept warm.

[0102] 2) perforation

[0103] The steel billet after step 1) heating and heat preserv...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a small-caliber steel pipe manufacturing method, and belongs to the technical field of metallurgical industry. The manufacturing method of the small-caliber steel pipe comprises the following steps: heating a steel billet; perforating the heated steel billet to obtain a hollow billet; blowing and brushing the perforated hollow billet; rolling the blown and brushed hollow billet to obtain a pierced billet; removing the pierced billet; reducing the diameter of the pierced billet after tube removal to obtain a pretreated steel tube; cooling the pretreated steel pipe; and arranging, distributing and shearing the cooled pretreated steel pipes. Pretreated steel pipes can be subjected to cooling control, the performance of the steel pipes is improved, and the crystal mixing phenomenon and the unstable mechanical property phenomenon are avoided.

Description

technical field [0001] The invention belongs to the field of metallurgical industry and relates to a method for manufacturing small-diameter steel pipes. Background technique [0002] As one of the important products in the steel industry, steel pipes are widely used in transportation, construction, machinery, automobiles, ships, oil pipelines and other fields. The core equipment to realize the steel pipe production process includes piercing machine, pipe rolling mill and sizing and reducing machine. Among them, the sizing and reducing machine is the finishing rolling equipment in the seamless steel pipe production line, which is to expand the range of product specifications and improve the dimensional accuracy of the rolling mill , head and tail dimensional tolerance, an ideal production equipment, however, after the production of the sizing and reducing unit, the steel pipes are air-cooled on the cooling bed, so as to realize the organizational transformation and subsequen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityApplications(China)
IPC IPC(8): B21B23/00B21B45/02
CPCB21B23/00B21B45/0233B21B2045/0227Y02P70/10
Inventor周民曾建敏欧阳建
OwnerCISDI ENG CO LTD