http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0308496-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3210f396233af067383f731c1e3336e3 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C21D2221-10 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C21D8-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22F1-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C21D7-13 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22F1-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C21D8-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C21D7-13 |
| filingDate | 1988-03-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2126fed38ecf26dcb21cd5c1c07ff86c |
| publicationDate | 1989-03-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0308496-A1 |
| titleOfInvention | Apparatus and methods for forming variable strength materials through rapid deformation. |
| abstract | The present invention relates to an apparatus and corresponding methods of using said apparatus, which serve to form a material (504), having high strength and good workability, by rapid deformation of a suitable base metal. (501) having a band structure, such as the alloy illustrated here which is an ordinary low carbon carbon steel alloy previously worked cold, so as to produce a high rate of modification in its internal energy which lowers the transformation temperatures of the base metal and consequently causes in the metal a transformation by allotropic phases. This rapid deformation can be obtained by rolling, extrusion or forging and produces an extremely high heating rate on each surface of the base metal. Before being deformed, the base metal is kept at a fairly low temperature, for example equal to or close to ambient temperature. The machining, preferably by rolling, which is used to obtain the deformation is maintained at a moderately high temperature. The subsequent rapid deformation of the base metal produces an extremely high heating rate on each surface of the metal, which in turn lowers the upper and lower temperatures during the transformation by heating at the surface regions of the metal. base and consequently allows the transformation into equiaxed grains of the band structure of the metal located in these surface regions. If the heating rate is insufficient to raise the temperature of the core of the base metal, which contains the grains in bands to a level allowing the transformation of the metal being in the other core, the core will then preserve its structure in worked bands Cold. Consequently, the transformed surface regions (510, 510 ′) will have an equiaxed grain structure which gives them increased ductility; while the core (511) of the material retains its grain structure |
| priorityDate | 1987-03-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 24.