METHOD FOR MANUFACTURING HIGH-CARBON CHROMIUM STEEL WIRE AND STRUCTURAL PARTS OF MACHINE
PROBLEM TO BE SOLVED: To provide a method for manufacturing a high-carbon chromium steel wire having good spheroidized structure by single spheroidizing annealing without generating cracks in the inside and to provide the structural parts of a machine such as bearings and various types of shafts exc...
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| creator | NISHIMURA SHOJI ONO NORIMASA |
| description | PROBLEM TO BE SOLVED: To provide a method for manufacturing a high-carbon chromium steel wire having good spheroidized structure by single spheroidizing annealing without generating cracks in the inside and to provide the structural parts of a machine such as bearings and various types of shafts excellent in wear resistance and fatigue characteristics. SOLUTION: After finishing a wire containing >=0.7% C and >=0.5% Cr after hot rolling into a prescribed shape by performing elongation the total reduction of area of which is 30-80% at a temperature not higher than the transformation point Ac1, spheroidizing annealing is performed. Elongation the reduction of area of which is >=30% is performed to the resultant wire at a temperature not higher than the transformation point Ac1. When expressing the reduction of area of wire drawing by DR and the total reaction (%) of area obtained by adding the reduction of area of the elongation to that of the wire drawing by TR, the wire drawing is performed at the reduction of area which satisfies DR=0.5% Cr and is manufactured by the above process is adopted as the base stock. |
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SOLUTION: After finishing a wire containing >=0.7% C and >=0.5% Cr after hot rolling into a prescribed shape by performing elongation the total reduction of area of which is 30-80% at a temperature not higher than the transformation point Ac1, spheroidizing annealing is performed. Elongation the reduction of area of which is >=30% is performed to the resultant wire at a temperature not higher than the transformation point Ac1. When expressing the reduction of area of wire drawing by DR and the total reaction (%) of area obtained by adding the reduction of area of the elongation to that of the wire drawing by TR, the wire drawing is performed at the reduction of area which satisfies DR<=0.0011×TR2-0.3603×TR+21.701 and also the total reduction TR of area of <=80% and, after finishing the wire into the prescribed shape, the spheroiding annealing may be performed. In the structural parts of the machine, the steel wire which contains >=0.7% C and >=0.5% Cr and is manufactured by the above process is adopted as the base stock.</description><edition>7</edition><language>eng</language><subject>ALLOYS ; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL ; CHEMISTRY ; FERROUS OR NON-FERROUS ALLOYS ; MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING ; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL ; METALLURGY ; PERFORMING OPERATIONS ; PUNCHING METAL ; TRANSPORTING ; TREATMENT OF ALLOYS OR NON-FERROUS METALS</subject><creationdate>2001</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=20010821&DB=EPODOC&CC=JP&NR=2001225105A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,778,883,25547,76298</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20010821&DB=EPODOC&CC=JP&NR=2001225105A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>NISHIMURA SHOJI</creatorcontrib><creatorcontrib>ONO NORIMASA</creatorcontrib><title>METHOD FOR MANUFACTURING HIGH-CARBON CHROMIUM STEEL WIRE AND STRUCTURAL PARTS OF MACHINE</title><description>PROBLEM TO BE SOLVED: To provide a method for manufacturing a high-carbon chromium steel wire having good spheroidized structure by single spheroidizing annealing without generating cracks in the inside and to provide the structural parts of a machine such as bearings and various types of shafts excellent in wear resistance and fatigue characteristics. SOLUTION: After finishing a wire containing >=0.7% C and >=0.5% Cr after hot rolling into a prescribed shape by performing elongation the total reduction of area of which is 30-80% at a temperature not higher than the transformation point Ac1, spheroidizing annealing is performed. Elongation the reduction of area of which is >=30% is performed to the resultant wire at a temperature not higher than the transformation point Ac1. When expressing the reduction of area of wire drawing by DR and the total reaction (%) of area obtained by adding the reduction of area of the elongation to that of the wire drawing by TR, the wire drawing is performed at the reduction of area which satisfies DR<=0.0011×TR2-0.3603×TR+21.701 and also the total reduction TR of area of <=80% and, after finishing the wire into the prescribed shape, the spheroiding annealing may be performed. 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SOLUTION: After finishing a wire containing >=0.7% C and >=0.5% Cr after hot rolling into a prescribed shape by performing elongation the total reduction of area of which is 30-80% at a temperature not higher than the transformation point Ac1, spheroidizing annealing is performed. Elongation the reduction of area of which is >=30% is performed to the resultant wire at a temperature not higher than the transformation point Ac1. When expressing the reduction of area of wire drawing by DR and the total reaction (%) of area obtained by adding the reduction of area of the elongation to that of the wire drawing by TR, the wire drawing is performed at the reduction of area which satisfies DR<=0.0011×TR2-0.3603×TR+21.701 and also the total reduction TR of area of <=80% and, after finishing the wire into the prescribed shape, the spheroiding annealing may be performed. In the structural parts of the machine, the steel wire which contains >=0.7% C and >=0.5% Cr and is manufactured by the above process is adopted as the base stock.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| subjects | ALLOYS AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL CHEMISTRY FERROUS OR NON-FERROUS ALLOYS MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY PERFORMING OPERATIONS PUNCHING METAL TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS |
| title | METHOD FOR MANUFACTURING HIGH-CARBON CHROMIUM STEEL WIRE AND STRUCTURAL PARTS OF MACHINE |
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