http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2007074984-A9
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_694f81756e92c09f407b691917f41467 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4d26d1575ffcdb125aba771e831d392f http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_177a7eb18c38361cedf3d93838be22a3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_96033d1b0d0b7472fdb909f5e6ecdcd7 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22C38-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22C38-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22C38-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22C38-00 |
| filingDate | 2006-12-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b4b0bcfcb0c767061c4143ed511bdddb http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_80053ddebc1f5d8902f2aac651161d15 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_affd3325289276b869849d8fedc5e55e |
| publicationDate | 2010-07-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | WO-2007074984-A9 |
| titleOfInvention | High-strength steel bolt having excellent resistance for delayed fracture and method for producing the same |
| abstract | A bolt for use in connection of steel structures and for use as automotive parts and components, and a method for producing the same are disclosed. More specifically, provided is a steel bolt which is capable of achieving high strength simultaneously with an excellent delayed fracture resistance, by appropriate control of the steel microstructure. The bolt has a composition comprising (i) 0.35-0.55 wt% of carbon, 0.05-2.0 wt% of silicon, 0.1-0.8 wt% of manganese, 0.001-0.004 wt% of boron, 0.3-1.5 wt% of chromium, 0.005 wt% and less of oxygen (T.O), 0.015 wt% and less of phosphorous, 0.010 wt% and less of sulfur, and the balance of Fe with inevitable impurities; and further comprising (ii) at least one selected from the group consisting of 0.05-0.5 wt% of vanadium, 0.05-0.5 wt% of niobium, 0.1-0.5 wt% of nickel, 0.1-1.5 wt% of molybdenum and 0.01-0.1 wt% of titanium, wherein the bolt has an internal structure composed of ferrite and tempered martensite, and a content of ferrite in the internal structure is 3 to 10% in terms of an area fraction. The present invention can provide a high-strength bolt which is capable of simultaneously achieving an excellent delayed fracture resistance and a high strength without addition of large amounts of alloying elements, and also exhibits no deterioration of notch toughness. Further, the present invention can provide a method for preparing such a bolt which is simply and conveniently carried out without complicated heat treatment processes. |
| priorityDate | 2005-12-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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