Composite article having a tubular sheath containing a compacted material, for the treatment of liquid metals, and process for the production of said article
AssigneeVallourec
InventorsMichel Douchy, Edmond Vachiery
Life of this patent
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Abstract
The invention concerns a composite article with a tubular metal sheath containing a compacted powdery or granular material. The article is of substantially circular cross section (153). Its sheath comprises at least one closed fold (154), the fold edge (156) of which is within the compacted material. The article is produced by forming an open fold along a generatrix of a circular metal sheath containing a non-consolidated powdery or granular material and then constricting the sheath so as to close the fold. The article is used for the treatment of meal baths, for example for the treatment of steel in a ladle.
Claims37
A process for the production of a composite article for the treatment of liquid metals, the process comprising the steps of:
- (a) creating an elongated tubular metal sheath having substantially circular cross-section and with sheath securely closed to contain a non-consolidated material;
- (b) deforming the metal sheath in a hollow configuration along at least one generatrix;
- (c) at least partially folding the sheath along the deformation, the fold edge being disposed in the interior of the material;
- wherein folding the sheath reduces the outside diameter of the tubular sheath without substantially changing the length of the sheath perimeter and wherein the material is sufficiently compacted to avoid movement of the material within the sheath prior to use.
A process to produce an improved composite article for the treatment of liquid metals, the composite article being a closed tubular metal sheath securely containing a non-consolidated material and having a substantially circular cross-section, the process for improvement comprising:
- (a) deforming the metal sheath along at least one generatrix;
- and
- (b) at least partially folding the sheath along the deformation, the fold edge being disposed in the interior of the material;
- wherein the outside diameter of the tubular sheath is reduced without substantially changing the length of the sheath and wherein the material is sufficiently compacted to avoid movement of the material in the sheath prior to use.
A process for the production of a composite article for the treatment of liquid metals, the process comprising the steps of:
- (a) forming a tubular metal sheath containing a non-consolidated material;
- (b) securely clasping the edges of the tubular metal sheath;
- (c) producing grooves along the clasped edge of the sheath;
- (d) deforming the sheath along at least one generatrix;
- and
- (e) at least partially folding the sheath along the deformation, the fold edge being disposed in the interior of the material;
- wherein the outside diameter of the tubular sheath is reduced without substantially changing the length of the sheath perimeter and wherein the material is sufficiently compacted to avoid movement of the material within the sheath prior to use.
A process for the production of a composite article containing a compacted material for the treatment of liquid metals, the process comprising the steps of:
- (a) creating an elongated tubular metal sheath having substantially circular cross-section by deforming the sheath and securely joining its edges, the sheath containing a non-consolidated material;
- (b) deforming the tubular metal sheath in a hollow configuration along at least one generatrix without subjecting the sheath to substantial axial elongation to produce at least one open fold;
- (c) at least partially folding the sheath along the deformation by applying radial pressure to the sheath, the fold edge being disposed in the interior of the material;
- wherein folding the sheath reduces the outside diameter of the tubular sheath without substantially changing the length of the sheath perimeter and wherein the material is sufficiently compacted to avoid movement of the material within the sheath prior to use.
A process to produce an improved composite article for the treatment of liquid metals which can be rolled and unrolled without damage to the article, the composite article being a tubular metal sheath containing a compacted material and having substantially circular cross-section, the article formed from a metal sheath containing material which has its edges securely joined, the process for improvement comprising:
- (a) deforming the metal sheath in a hollow configuration along at least one generatrix;
- and
- (b) at least partially folding the sheath along the deformation, the fold edge being disposed in the interior of the material;
- wherein the outside diameter of the tubular sheath is reduced without substantially changing the length of the sheath and wherein the material is sufficiently compacted to avoid movement of the material within the sheath prior to use.
Dependencies are inferred from the claim text.