http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108467917-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P10-20 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C21D8-065 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C21C7-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C21C5-5264 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C21C7-064 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C21D1-26 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C21C5-52 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C21C7-064 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C21C7-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C21D8-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C21D1-26 |
| filingDate | 2018-06-05^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-09-29^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-09-29^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-108467917-B |
| titleOfInvention | Manufacturing method of steel bar for 23CrNi3MoA drill bit |
| abstract | The invention relates to a method for manufacturing a steel bar for a 23CrNi3MoA drill bit, which is a method for manufacturing a steel bar by utilizing a large-specification alloy steel vertical continuous casting round billet (diameter: or Or ) The invention relates to a method for producing a steel bar for a 23CrNi3MoA drill bit by heating and then directly rolling and forming, which adopts a vertical continuous casting machine without a bending-straightening process, without the difference of cooling conditions of inner and outer arcs of a casting blank, the difference of temperatures of the inner and outer sides of the casting blank, the problems of uneven casting structure and internal stress, segregation of impurities and the like, the produced raw material has uniform components, structure and mechanical property, is not easy to have the defects of surface cracks and the like, directly rolls a large-size blank after heating, has enough rolling ratio, ensures sufficient deformation and grain refinement of the steel bar for the drill bit, improves the grain size of a material, has stable product quality, adopts continuous casting blank production, has high material utilization rate, low raw material cost, shortens the manufacturing and processing period and improves the production efficiency, and is used for producing the steel bar for the 23CrNi3 |
| priorityDate | 2018-06-05^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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