Short-flow preparation process for thick-wall ring piece and thick-wall tube piece

A preparation process and short process technology, applied in the field of high-end equipment manufacturing, can solve the problems of many manufacturing processes and long production cycle, and achieve the effect of long manufacturing cycle, many heating times and reducing heating times.

Active Publication Date: 2011-09-14
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a short-process preparation process for thick-walled rings or pipes based on hollow billet continuous casting technology, so as to solve the problems of many manufacturing processes and long production cycles in the prior art.

Method used

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  • Short-flow preparation process for thick-wall ring piece and thick-wall tube piece
  • Short-flow preparation process for thick-wall ring piece and thick-wall tube piece
  • Short-flow preparation process for thick-wall ring piece and thick-wall tube piece

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preparation example Construction

[0034] 1. Preparation of continuous casting hollow billet

[0035] As shown in Figure 1(a)-(b), the hollow billet continuous casting equipment of the present invention mainly includes: a bottom drain ladle 1, molten metal 2, submerged nozzle 3, inner and outer mold connecting bridge 4, outer mold 5, inner mold Crystallizer 6, hollow billet 7, dummy bottom plate 8, core cooling device 9 and water mist cooling device 10, etc., the specific structure is as follows:

[0036] The bottom of the bottom drain ladle 1 is provided with at least one submerged nozzle 3 (three evenly distributed in this embodiment), the submerged nozzle 3 extends into the annular cavity formed between the inner mold 6 and the outer mold 5, and the inner crystallizer The crystallizer 6 and the external crystallizer 5 are connected through the connecting bridge 4 between the internal and external crystallizers. The molten metal 2 is poured at multiple points by using the submerged nozzle. The annular cavity...

Embodiment 1

[0048] Material: Q345E;

[0049] Hollow continuous casting slab inner diameter: 500mm;

[0050] Outer diameter of hollow continuous casting slab: 1200mm;

[0051] Hollow continuous casting slab cutting length: 215mm.

[0052] On the forging press, the above blanks are axially compressed to about 150mm, and the hollow continuous casting blanks are axially thickened to increase the compression ratio in the forming process of thick-walled ring parts. The forging ratio is 4.5.

[0053] Then carry out radial reaming and axial edge fixing on the prefabricated hollow billet on the ring rolling machine to produce ring flange parts for wind towers. The finished size of the ring parts is as follows:

[0054] Flange outer diameter: 4500mm;

[0055] Flange wall thickness: 100mm;

[0056] Flange height: 140mm;

[0057] Total weight of the flange: 2200kg.

Embodiment 2

[0059] Material: 508III;

[0060] Hollow continuous casting slab inner diameter: 1000mm;

[0061] Outer diameter of hollow continuous casting slab: 2000mm;

[0062] Hollow continuous casting slab cutting length: 2000mm.;

[0063] Radial reaming and axial elongation are carried out on the above blank on the forging press to produce the nuclear power evaporator cylinder. The dimensions of the finished cylinder are as follows:

[0064] Cylinder outer diameter: 4600mm;

[0065] Cylinder wall thickness: 165mm;

[0066] Cylinder height: 3600mm;

[0067] The total weight of the cylinder: 32000kg.

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Abstract

The invention belongs to the field of high-end equipment manufacturing, in particular to a hollow-ingot-continuous-casting-manufacturing-technology-based short-flow preparation process for a highly compact and purely purified thick-wall ring piece and a highly compact and purely purified thick-wall tube piece. The raw blanks of the thick-wall tube piece and the thick-wall ring piece are produced by a hollow ingot continuous casting technology, and the thick-wall ring piece and the thick-wall tube piece are produced by a ring roller machine and a forging press. Generally, the thick-wall ring piece and the thick-wall tube piece which have a large diameter is prepared from solid steel ingot by the steps of upsetting, punching, drawing-out, chambering and the like, the process is complex, themanufacturing period is long, and the heating frequency is high. The hollow steel ingot prepared by the technology has the characteristics of high compactness and purity degree, and provides high-quality raw materials for the high-end ring piece and the high-end tube piece. Through the hollow ingot continuous casting, the steps of upsetting and punching are saved, and the large-diameter tube piece and the large-diameter ring piece can be prepared only by the steps of drawing-out and chambering, the manufacturing period is greatly shortened, the heating frequency is reduced, and the short-flowmanufacturing of the high-end ring piece and the high-end tube piece is realized.

Description

technical field [0001] The invention belongs to the field of high-end equipment manufacturing, and specifically relates to a short-process preparation process for highly dense and purified thick-walled rings and pipes based on continuous casting hollow billet manufacturing technology. Background technique [0002] With the rapid development of wind power, nuclear power and other high-end equipment manufacturing industries, the amount of thick-walled rings and pipes is increasing, and the quality requirements are getting higher and higher. Taking flanges for wind towers in the field of wind power as an example, at least 10 million tons of flanges are used for newly installed wind towers in my country every year. At the same time, the pace of nuclear power development is increasing day by day, and large thick-walled forgings such as nuclear power barrels and cones are all hollow parts, and the consumption is huge. These high-end thick-walled rings and tubes are currently manu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/041
Inventor 栾义坤王佳琪傅排先孙明月夏立军李殿中李依依
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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