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
CN108348971AActive Publication Date: 2018-07-31VITKOVICE CYLINDERS AS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
VITKOVICE CYLINDERS AS
Publication Date
2018-07-31

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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.
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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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