Blast treatment method
AssigneeKabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
InventorsKoichi Hayashi, Takao Shirakura, Kiyoshi Asahina
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Abstract
Provided is a blast treatment method with which the object to be treated can be treated more reliably and efficiently. This method includes: a step wherein an explosive is detonated inside a pressure vessel (30) comprising an elasto-plastic metal, thereby imparting to the pressure vessel (30) an initial load wherein the primary + secondary stress generated in at least a portion of the structural parts of the pressure vessel becomes a stress that is included in a plastic region exceeding the elastic region, thereby generating a shakedown state in the pressure vessel (30); and a subsequent step wherein a treatment explosive (50) is detonated within the pressure vessel (30), thereby blasting the object (10) to be treated.
Claims6
A blast treatment method for blasting an object to be treated, including:
- a process of preparing a pressure vessel that comprises a metal having elasto-plasticity, has a shape allowing the object to be treated to be contained in a closed state, and has an inner circumferential surface to receive detonation energy generated when the object to be treated is blasted in the contained state;
- an initial load giving process of giving an initial load to the extent that the sum of a primary stress and a secondary stress generated in the pressure vessel exceeds an elastic limit and reaches a plastic region at least at a part of a structural part excluding a local structural discontinuous part of the pressure vessel and generating a shakedown state in the pressure vessel by containing an explosive to give an initial load in the pressure vessel, sealing the pressure vessel, and detonating the explosive to give the initial load;
- and
- a treatment process of blasting the object to be treated in the pressure vessel by containing the object to be treated and a treatment explosive in the pressure vessel after the initial load is given, sealing the pressure vessel, and detonating the treatment explosive.
Dependencies are inferred from the claim text.