Method of production of high-pressure seamless cylinder from corrosion-resistant steel

A seamless gas cylinder, corrosion-resistant steel technology, applied in the field of material forming, can solve the problems of complex handling, storage and transportation, low strength, high quality, etc., and achieve the effect of material saving, low quality and reduced quality

Active Publication Date: 2018-07-31
VITKOVICE CYLINDERS AS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since these processes are not able to produce sufficiently thin-walled pipes as starting semi-finished products, all such pressure bottles made using pipe-based production methods have a thick-walled structure and thus their significant disadvantage is the very high mass
Cylinders of this weight complicate handling, storage and transport, especially with increasing volume
Another disadvantage of existing thick-walled gas cylinders is their low strength

Method used

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  • Method of production of high-pressure seamless cylinder from corrosion-resistant steel
  • Method of production of high-pressure seamless cylinder from corrosion-resistant steel
  • Method of production of high-pressure seamless cylinder from corrosion-resistant steel

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Embodiment Construction

[0018] with the help of Figure 1 to Figure 4 And the production method of corrosion-resistant high-pressure seamless gas cylinders for the storage, transportation and use of natural gas described below diagrammatically shows an example of an embodiment of the present invention.

[0019] Parts of the dimensions required to manufacture gas cylinders with a production volume are first cut from a strip of corrosion-resistant steel billet with a square or circular cross-section. Each individual component, the starting steel blank 1 , is coated on at least 85% of its surface with a coating 2 of a material based on water glass. The thickness of the applied layer is 20 μm to 150 μm. Suspensions commonly referred to as water glass are used as water glass-based material. For the purposes of the present invention, a suspension based on water glass means a suspension comprising 20% ​​to 40% by weight of sodium or potassium silicate or a mixture thereof and 80% to 40% by weight of water...

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Abstract

Blank (1) of corrosion-resistant steel is coated with coating (2) of water glass with thickness of 20 to 150 microns, cured at 15 to 60 DEG C, and heated in an induction furnace to the temperature of1180 DEG C to 1260 DEG C. The heated up blank (1) is without cooling by water descaling transferred into an extrusion press and extruded here, while the coating (2) is broken to pieces and largely removed. Then drawing in a horizontal drawing press and necking are performed. After forming to the final shape of the cylinder, leftovers of coating (2) are removed by pressure blasting. A corrosion-resistant thin-walled seamless high-pressure cylinder with volume of 5 to 260 litres is manufactured.

Description

technical field [0001] The present invention relates to the field of material forming, namely the production of high-pressure gas cylinders from corrosion-resistant steels using the hot reverse extrusion method, which has been completely resolved in order specifically to obtain high-pressure seamless gas cylinders free from hydrogen embrittlement and corrosion of the inner surfaces. Background technique [0002] Currently, high pressure seamless steel gas cylinders are produced using reverse extrusion and stretching methods utilizing the process according to CZ patent 243247. [0003] When using the process according to CZ patent 243247, a steel billet is first cut from a square or circular section billet. The billet is heated in an induction furnace to an output temperature of 1000 to 1250°C, after which the billet is automatically transferred to a descaling device where high-pressure water jets are used to remove scales on the billet surface. Each individual billet is the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/20B21C23/32
CPCB21C23/32B21C23/205B21C23/20B21C23/218
Inventor 帕维尔·库希拉派特·霍福瑞克托马斯·派加诺夫斯基
Owner VITKOVICE CYLINDERS AS
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