http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H1058161-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d6402b23ab8782152be47b3996e48a4a |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B21C37-083 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B23K37-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B23K13-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B21C37-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B23K20-00 |
| filingDate | 1997-05-07^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a7bdb5beb8eca4dd04cfd880c44f28a3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_547a91eaefb56f2af98322647c822dfb http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d2489e2ce31c915c5a12791e9664fb16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0681c3d301985215176c573d8ade66ec http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_461dcf5753197944a9450728eef53233 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f2cd3cc0179ad5c26cd9513cdaf658de http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_62bbf6705b0d6e9a171b041c42faf007 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a0ec4132ec3d3db60dbb647a0cc4ba12 |
| publicationDate | 1998-03-03^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H1058161-A |
| titleOfInvention | Welded steel pipe and manufacturing method thereof |
| abstract | PROBLEM TO BE SOLVED: To provide a steel pipe having excellent seam quality and surface skin, and having excellent pitting corrosion resistance, and a method of manufacturing a steel pipe by an induction heating method capable of manufacturing the steel pipe with high productivity. I do. SOLUTION: A steel strip is preheated and continuously formed by a forming roll group to form an open pipe, and both edges of the open pipe are heated to a temperature higher than the Curie point by induction heating, preferably at 1300 ° C. 1300 due to edge preheating and induction heating in temperatures below After performing edge heating to a temperature range of not less than ° C and less than the melting point, the steel tube is abutted with a squeeze roll and pressed to form a steel pipe. At that time, it is preferable that after the pressure welding, the bonded portion is maintained at 1300 ° C. or higher for 0.03 seconds or longer or a time corresponding to the oxygen concentration in the atmosphere. Further, it is preferable that the preheating of the steel strip is 800 ° C. or less, and that the edge preheating, the edge heating and the pressure welding are performed in an oxygen concentration atmosphere lower than the atmosphere. As a result, the acceleration coefficient α in the corrosion test becomes 1.4 or less as an index of pitting corrosion resistance. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-0196624-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7591914-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-02103069-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-02103070-A1 |
| priorityDate | 1996-06-10^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
| Predicate | Subject |
|---|---|
| isDiscussedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/substance/SID419523291 http://rdf.ncbi.nlm.nih.gov/pubchem/compound/CID977 http://rdf.ncbi.nlm.nih.gov/pubchem/anatomy/ANATOMYID14 |
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