http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102407242-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a60292d5c84216ac32394c859de7bdf1 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B21C1-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B21C43-02 |
| filingDate | 2010-09-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2013-07-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f3ace32654a56bdf6464a1c401c4805e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fb4ca9ccacd18d665c83e8190f857572 |
| publicationDate | 2013-07-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-102407242-B |
| titleOfInvention | Cold drawing method of special-shaped bearing steel bar material |
| abstract | The invention discloses a cold drawing method of a special-shaped bearing steel bar material, which comprises the following steps: (1) stripping the surface; (2) pretreating the surface; (3) cold drawing pre-stage deformation, wherein the amount of pre-stage cold drawing deformation is controlled at 7-10%, the cold drawing speed is less than or equal to 80m/minute; (4) recrystallizing and annealing; (5) pretreating the surface after annealing; (6) cold drawing and moulding; wherein the cold drawing deformation is controlled at 30-45%, the cold drawing speed is less than or equal to 40m/minute. According to the invention, the current single stage cold drawing is improved to double stages cold drawing, the phenomena of napping and big embowed blade on the surface of special-shaped bearing steel bar material can be avoided during the cold drawing process, thereby the rolling yield of the bar material is enhanced. |
| priorityDate | 2010-09-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 23.