| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d9de52bba13e16028dffa8775e3f3f28 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22C38-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C21D2211-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C21D2221-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C21D2211-009
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C21D2211-002
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C21D2211-001 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C21D9-28
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C21D9-085
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C21D1-60
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C21D1-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22C38-44
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22C38-22 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C21D1-60
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22C38-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C21D1-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22C38-44
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22C38-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C21D9-28
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C21D9-08 |
| filingDate |
2020-03-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2021-08-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fc65a5ff62684801206e8267b1d32693
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a708c4406f6b6889edb159231640c8fe
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1b496adc2c7b060f21361305a2a2fc02 |
| publicationDate |
2021-08-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-11085096-B2 |
| titleOfInvention |
Method for preventing cracking along the surface at the inner hole of a hollow shaft during horizontal water quenching |
| abstract |
A method is provided for preventing cracking along the surface at the inner hole of a hollow shaft during water quenching, including: a step of water-quenching the inner hole of the shaft placed horizontally, while the outer circle of the shaft is in a state of air cooling, in which the cooling time of the outer circle is selected to be not lower than its Ar1 temperature so as to induce a compressive stress in the surface layer of the inner hole; and a step of water-quenching the outer circle and the inner hole of the shaft simultaneously, moreover, the quenching intensity of the inner hole is gradually reduced to cause a temperature rise in the surface layer of the inner hole to allow martensite in the surface layer to undergo self-tempering, which prevents the formation of quenching cracks along the surface of the inner hole. |
| priorityDate |
2019-03-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |