Method for the production of hot-finished seamless pipes having optimized fatigue properties in the welded state
The invention relates to a method for the production of hot-finished, seamless pipes having optimized fatigue properties in the welded state, having an outside diameter of up to 711 mm and a nominal wall thickness of up to 100 mm, made of metal, in particular steel. After hot or finish rolling, a de...
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| creator | SOMMERKAMP OLIVER ROTT CAROLINE RING MARKUS KLOSTER GERD ERDELEN-PEPPLER MARION |
| description | The invention relates to a method for the production of hot-finished, seamless pipes having optimized fatigue properties in the welded state, having an outside diameter of up to 711 mm and a nominal wall thickness of up to 100 mm, made of metal, in particular steel. After hot or finish rolling, a defined pipe cross-section is produced on at least one pipe end across a predetermined length, having tight tolerances for inside and outside diameters, wherein the cross-section can then be welded to the pipe end of another pipe. According to the invention, in a region a wall thickness is created in a first step at the pipe end in question, the thickness being bigger than on the remaining pipe body, wherein the outside diameter is increased and/or the inside diameter is reduced. In the upsetting process, a transition region produced on the outside circumference during upsetting and the transition region produced on the inside circumference are offset with respect to the pipe body in the direction of the longitudinal |
| format | Patent |
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After hot or finish rolling, a defined pipe cross-section is produced on at least one pipe end across a predetermined length, having tight tolerances for inside and outside diameters, wherein the cross-section can then be welded to the pipe end of another pipe. According to the invention, in a region a wall thickness is created in a first step at the pipe end in question, the thickness being bigger than on the remaining pipe body, wherein the outside diameter is increased and/or the inside diameter is reduced. In the upsetting process, a transition region produced on the outside circumference during upsetting and the transition region produced on the inside circumference are offset with respect to the pipe body in the direction of the longitudinal</description><language>chi ; eng</language><subject>FORGE FURNACES ; FORGING ; HAMMERING ; MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES,RIVETS, BOLTS OR WHEELS ; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL ; PERFORMING OPERATIONS ; PRESSING METAL ; PUNCHING METAL ; RIVETING ; TRANSPORTING</subject><creationdate>2010</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20100908&DB=EPODOC&CC=CN&NR=101827666A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25563,76418</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20100908&DB=EPODOC&CC=CN&NR=101827666A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>SOMMERKAMP OLIVER</creatorcontrib><creatorcontrib>ROTT CAROLINE</creatorcontrib><creatorcontrib>RING MARKUS</creatorcontrib><creatorcontrib>KLOSTER GERD</creatorcontrib><creatorcontrib>ERDELEN-PEPPLER MARION</creatorcontrib><title>Method for the production of hot-finished seamless pipes having optimized fatigue properties in the welded state</title><description>The invention relates to a method for the production of hot-finished, seamless pipes having optimized fatigue properties in the welded state, having an outside diameter of up to 711 mm and a nominal wall thickness of up to 100 mm, made of metal, in particular steel. 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After hot or finish rolling, a defined pipe cross-section is produced on at least one pipe end across a predetermined length, having tight tolerances for inside and outside diameters, wherein the cross-section can then be welded to the pipe end of another pipe. According to the invention, in a region a wall thickness is created in a first step at the pipe end in question, the thickness being bigger than on the remaining pipe body, wherein the outside diameter is increased and/or the inside diameter is reduced. In the upsetting process, a transition region produced on the outside circumference during upsetting and the transition region produced on the inside circumference are offset with respect to the pipe body in the direction of the longitudinal</abstract><oa>free_for_read</oa></addata></record> |
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| language | chi ; eng |
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| subjects | FORGE FURNACES FORGING HAMMERING MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES,RIVETS, BOLTS OR WHEELS MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PRESSING METAL PUNCHING METAL RIVETING TRANSPORTING |
| title | Method for the production of hot-finished seamless pipes having optimized fatigue properties in the welded state |
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