SE464226B - ROLLING RING, COMPOSITION OF HEAVY METAL AND MOLDING AND SET FOR MANUFACTURING THEREOF - Google Patents

ROLLING RING, COMPOSITION OF HEAVY METAL AND MOLDING AND SET FOR MANUFACTURING THEREOF

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Publication number
SE464226B
SE464226B SE8804503A SE8804503A SE464226B SE 464226 B SE464226 B SE 464226B SE 8804503 A SE8804503 A SE 8804503A SE 8804503 A SE8804503 A SE 8804503A SE 464226 B SE464226 B SE 464226B
Authority
SE
Sweden
Prior art keywords
cemented carbide
rolling
casting
cast
iron
Prior art date
Application number
SE8804503A
Other languages
Swedish (sv)
Other versions
SE8804503L (en
SE8804503D0 (en
Inventor
G Sundstedt
Original Assignee
Sandvik Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sandvik Ab filed Critical Sandvik Ab
Priority to SE8804503A priority Critical patent/SE464226B/en
Publication of SE8804503D0 publication Critical patent/SE8804503D0/en
Priority to AU45850/89A priority patent/AU615125B2/en
Priority to BR898906357A priority patent/BR8906357A/en
Priority to ZA899448A priority patent/ZA899448B/en
Priority to JP1320708A priority patent/JPH0699776B2/en
Priority to DD89335556A priority patent/DD296011A5/en
Priority to DE89850432T priority patent/DE68907702T2/en
Priority to EP89850432A priority patent/EP0374116B1/en
Priority to CA002005220A priority patent/CA2005220C/en
Priority to AT89850432T priority patent/ATE91725T1/en
Priority to ES198989850432T priority patent/ES2042071T3/en
Priority to KR1019890018461A priority patent/KR960007504B1/en
Priority to US07/449,820 priority patent/US5044056A/en
Publication of SE8804503L publication Critical patent/SE8804503L/en
Priority to US07/658,651 priority patent/US5104458A/en
Publication of SE464226B publication Critical patent/SE464226B/en
Priority to US07/813,921 priority patent/US5167067A/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • B21B27/03—Sleeved rolls
    • B21B27/035—Rolls for bars, rods, rounds, tubes, wire or the like
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D5/00—Heat treatments of cast-iron

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Geometry (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Heat Treatment Of Articles (AREA)
  • Rolling Contact Bearings (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Glass Compositions (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)

Abstract

The present invention discloses a roll ring for hot and/or cold rolling. The rolling track comprises one or several cemented carbide rings, which are cast into a casing made by an iron alloy. The cast alloy comprisin'g a materially graphitic cast iron, which after the casting contains residual austenite. This residual austenite is at subsequent heat treatment or treatments partly or totally transformed under volume increase to mainly bainite with the aim of reducing or totally eliminating the differential shrinkage between the cast iron and the cemented carbide as a result from cooling after the casting.

Description

r .i 464 226 eller metallegering, där de båda delarna är metallurgiskt bunda med varandra (se exempelvis US patent 3, 609, 849). 464,226 or metal alloy, where the two parts are metallurgically bonded to each other (see, for example, U.S. Patents 3,609,849).

I det förstnämnda fallet krymper stommen under avsvalningen från gjutningstemperaturen mera än hårdmetallringen, vilket ger upphov till inåtriktade krafter på hårdmetallringen. Dessa krafter ger upphov till axiellt riktade dragspänningar i hårdmetallringens yttre mantelyta, vilka verkar vinkelrätt mot mikrosprickor som uppkommer i valsytan under valsningen. Under påverkan av dessa dragspänningar propagerar mikrosprickorna på djupet, vilket kan leda till valsbrott alternativt till behov av extra bortslipning, begränsande valsens totala valsningskapacitet.In the former case, the body shrinks during the cooling from the casting temperature more than the cemented carbide ring, which gives rise to inward forces on the cemented carbide ring. These forces give rise to axially directed tensile stresses in the outer circumferential surface of the cemented carbide ring, which act perpendicular to microcracks which occur in the rolling surface during rolling. Under the influence of these tensile stresses, the microcracks propagate at depth, which can lead to roll breakage or to the need for extra grinding, limiting the total rolling capacity of the roll.

I det sistnämnda fallet används antingen material i höljet, karak- teriserade av låg hårdhet och låg sträckgräns eller hårdmetall som är ett sprött material, ingetdera särskilt lämpligt i de för vridmomentöverföringen nödvändiga kopplingarna.In the latter case, either materials are used in the housing, characterized by low hardness and low yield strength, or cemented carbide which is a brittle material, neither of which is particularly suitable in the couplings necessary for torque transmission.

Enligt uppfinningen föreligger nu en kompositvals där de skadliga dragspänningarna kunnat elimineras eller reduceras i väsentlig utsträckning. Detta har uppnåtts genom att hårdmetallringen in- gjutits i ett väsentligen grafitiskt gjutjärn med en sammansättning som avpassats efter kolekvivalenten, C ekv. på sätt som redovisas i svenska patentet nr. 7601289-7, publiceringsnummer 399911. Gjut- järnets sammansättning är vald även med hänsyn till optimal metallur- gisk bindning till hårdmetallen, till dess hållfasthetsegenskaper och hårdhet, nödvändiga för överföringen av vridmomentet samt till dess bearbetbarhet. Genom tillsats av ferro-kisel-magnesium och/ eller nickel-magnesium erhålls i gjutlegeringen en magnesiumhalt av 0,02-0,10, företrädesvis 0,04-0,07 viktsprocent. Genom ympning med ferrokisel erhålls i gjutlegeringen en kiselhalt av 1,9-2,8, företrädesvis 2,1-2,5 viktsprocent. Därigenom erhålls ett segjärn med dispers, sfäroidiserad grafit. Detta segjärn har för använd- ningen väl avvägd hårdhet-seghet-hållfasthet. I värmebehandlat tillstånd är hårdheten HB 250-350 (brinellhårdhet). Vidare har järnet legerats med austenitbildande legeringsämnen, företrädesvis nickel i halter mellan 3-10, företrädesvis 4-8 viktsprocent, som 3 464 226 leder till en viss mängd restaustenit, nämligen 5-30, företrädesvis 10-25, helst 15-20 viktsprocent efter gjutningen. Genom Värmebe- handling i ett eller flera steg kan en lämplig mängd restaustenit under volymökning omvandlas till andra strukturelement, t ex bainit. Denna volymökning kan drivas därhän att den under avsval- ningen från gjuttemperaturen erhållna differentiella krympningen inom kompositvalsen helt eller delvis elimineras. Sättet för värmebehandling väljs efter hårdmetallsort och efter valsapplika- tion. Värmebehandlingen innebär värmning till och hållning vid 800-1000 °C, avsvalning till och hållning vid 400-550 °C samt avsvalning till rumstemperatur.According to the invention, there is now a composite roller where the harmful tensile stresses could be eliminated or reduced to a significant extent. This has been achieved by casting the cemented carbide ring in a substantially graphitic cast iron with a composition which is adapted to the carbon equivalent, C eq. in the manner reported in Swedish patent no. 7601289-7, publication number 399911. The composition of the cast iron is also chosen with regard to optimal metallurgical bonding to the cemented carbide, to its strength properties and hardness, necessary for the transmission of the torque and to its machinability. By adding ferro-silicon-magnesium and / or nickel-magnesium, a magnesium content of 0.02-0.10, preferably 0.04-0.07% by weight, is obtained in the casting alloy. By grafting with ferro-silicon, a silicon content of 1.9-2.8, preferably 2.1-2.5% by weight, is obtained in the casting alloy. Thereby a ductile iron with dispersed, spheroidized graphite is obtained. This ductile iron has a well-balanced hardness-toughness-strength for use. In the heat-treated state, the hardness is HB 250-350 (brinell hardness). Furthermore, the iron has been alloyed with austenite-forming alloying elements, preferably nickel in levels between 3-10, preferably 4-8% by weight, which leads to a certain amount of residual austenite, namely 5-30, preferably 10-25, preferably 15-20% by weight after the casting. Through heat treatment in one or more steps, a suitable amount of residual austenite during volume increase can be converted to other structural elements, eg bainite. This volume increase can be driven by completely or partially eliminating the differential shrinkage obtained during the cooling from the casting temperature within the composite roll. The method of heat treatment is selected by carbide type and by roller application. The heat treatment involves heating to and holding at 800-1000 ° C, cooling to and holding at 400-550 ° C and cooling to room temperature.

Sättet att gjuta in en hårdmetallring i gjutjärn följer i huvudsak gängse gjuteriteknik. Emellertid leder kraven på invändningsfri metallurgisk bindning mellan hårdmetall och gjutjärn samt på de speciella egenskaper man fordrar av gjutjärnet till noggrann styrning av gjuttekniken, bl a innebärande följande moment: - Extrem övertemperatur av järnet i skänken.The method of casting a cemented carbide ring in cast iron mainly follows standard foundry technology. However, the requirements for unobjectionable metallurgical bonding between cemented carbide and cast iron as well as the special properties required of the cast iron lead to accurate control of the casting technique, including the following steps: - Extreme overtemperature of the iron in the ladle.

- Mängd- och flödeskontrollerad genomströmning av smält järn för tidsavvägd värmning och uppsmältning av ett ytskikt av den i sandformen befintliga hårdmetallringen.Quantity- and flow-controlled flow of molten iron for time-balanced heating and melting of a surface layer of the cemented carbide ring present in the sand mold.

- Antändning av exotermt material inlagt i väl tilltaget utrymme ovan valsringsutrymmet för att hålla en viss övermängd järn i smält tillstånd för efterfyllning av valsringsutrymmet.Ignition of exothermic material placed in a large area above the rolling ring space to keep a certain amount of iron in the molten state for refilling the rolling ring space.

- Ympning i såväl skänk som gjutform.- Inoculation in both sideboard and mold.

Segjärnet och bindningen mellan segjärn och hårdmetall i den gjutna kompositvalsen kontrolleras med ultraljudmetoder.The ductile iron and the bond between ductile iron and cemented carbide in the cast composite roll are checked by ultrasonic methods.

Föreliggande kompositvals mottar i allmänhet vridmomentet via konventionella kilförband, splines, klokopplingar eller liknande, kända momentöverförande förband, utförda i den betydligt mindre anvisningskänsliga gjutjärnsdelen av kompositvalsen, varifrån 464 226 L/ vridmomentet förs vidare till hårdmetallringen via den metallur- giska bindningen mellan hårdmetallen och gjutjärnet. Dock före- kommer valsverkskonstruktioner som blott medger drivning med friktion i valsringshålet.The present composite roll generally receives the torque via conventional wedge joints, splines, claw couplings or the like, known torque transmitting joints, made in the much less instruction-sensitive cast iron part of the composite roll, from which the 464 226 L / torque is passed to the cemented carbide ring via the metallurgical bond. . However, there are rolling mill constructions that only allow driving with friction in the rolling ring hole.

Vid hårdmetallvalsringar motverkas den radiella valskraften av motriktad radiell kraft enbart från valsaxeln mot hårdmetallvals- ringens inre mantelyta. På grund av att hårdmetall har en elastici- tetsmodul som är 2-3 gånger den för stål eller gjutjärn, kommer den radiella valskraften att elastiskt deformera det mot hårdmetall- ringhålet stödande materialet med åtföljande elastisk deformation av hårdmetallringen och därav följande tangentiella dragspänningar i hårdmetallringen med maximum vid dess innerdiameter. Vid komposit- valsringar enligt uppfinningen upptar gjutjärnsmaterialet på ömse sidor om hårdmetallringen en andel av valskraften, vilket reducerar dragspänningarna i motsvarande grad.In cemented carbide rolling rings, the radial rolling force is counteracted by opposite radial force only from the rolling shaft towards the inner casing of the cemented carbide rolling ring. Because the cemented carbide has a modulus of elasticity 2-3 times that of steel or cast iron, the radial rolling force will elastically deform the material supporting the cemented carbide ring hole with consequent elastic deformation of the cemented carbide ring and consequent tangential tensile stresses in the cemented carbide ring with maximum at its inner diameter. In composite rollers according to the invention, the cast iron material on both sides of the cemented carbide ring occupies a proportion of the rolling force, which reduces the tensile stresses to a corresponding degree.

Hårdmetallringens radiella väggtjocklek kan i kompositvalsar enligt uppfinningen reduceras på grund av ovan anförda begränsningar av dragspänningarna från valskraften. Dessutom ger inte överföring av det vridande_momentet med konventionella kilförband o dyl något bidrag till de tangentiella dragspänningarna. Även vid friktions- drivning i hålet av kompositvalsar är den därav uppkommande drag- spänningen i hårdmetallringen begränsad i förhållande till densamma i valsringar helt av hårdmetall.The radial wall thickness of the cemented carbide ring can be reduced in composite rollers according to the invention due to the above-mentioned limitations of the tensile stresses from the rolling force. In addition, transmission of the torque with conventional wedge joints and the like does not contribute to the tangential tensile stresses. Even during frictional driving in the hole of composite rollers, the resulting tensile stress in the cemented carbide ring is limited in relation to the same in roller rings made entirely of cemented carbide.

I jämförelse med valsringar helt av hårdmetall med kilspår eller drivklackar i sidoytorna, kan hårdmetallringen i kompositvalsar enligt uppfinningen göras smalare genom att drivdonen förläggs till gjutjärnsdelen.In comparison with roller rings made entirely of cemented carbide with keyways or drive lugs in the side surfaces, the cemented carbide ring in composite rollers according to the invention can be made narrower by placing the drive units to the cast iron part.

Sammantaget karakteriseras kompositvalsen enligt uppfinningen av en hårdmetallring av mindre dimensioner än valsringar helt av hård- metall, resulterande i lägre kostnad. Vidare sker bearbetningen av kompositvalsens hål, sidor och drivdon i gjutjärn som är betydligt mera lättbearbetat än hårdmetall, resulterande i lägre kostnad.Overall, the composite roll according to the invention is characterized by a cemented carbide ring of smaller dimensions than roll rings made entirely of cemented carbide, resulting in a lower cost. Furthermore, the machining of the composite roller's holes, sides and actuators takes place in cast iron, which is considerably easier to machine than cemented carbide, resulting in a lower cost.

(L- 5 464 226 De för överföring av vridande moment nödvändiga spåren kan göras i kompositvalsringens hål eller i dess sidoytor. En eller flera kompositvalsringar kan monteras på en valskropp med lagertappar i båda ändar och som är försedd med delar som griper in i spåren i kompositvalsringen och därmed överför vridande momentet från axeln antingen direkt eller via en mellanhylsa. Några alternativa lös- ningar visas i figur l och 2.The grooves necessary for transmitting rotating torques can be made in the holes of the composite roller ring or in its side surfaces. One or more composite roller rings can be mounted on a roller body with bearing pins at both ends and provided with parts which engage in the grooves in composite roller ring and thus transmits the rotating torque from the shaft either directly or via an intermediate sleeve.Some alternative solutions are shown in Figures 1 and 2.

Figur 1 visar en valskonstruktion, där vridmomentet överförs från valsaxeln l via kilen 2 till hylsan 3, vars drivklackar 4 passande i spåren 5 för vridmomentet vidare till kompositvalsens segjärnsdel 6 och via den metallurgiska bindningen A vidare till hårdmetall- ringen 7. Valsringarnas inbördes axiella läge bestäms av hylsan 3 och fixeras via hylsan 8 av muttern 9 med extra fixeringsskruv 10.Figure 1 shows a roll construction, where the torque is transmitted from the roll shaft 1 via the wedge 2 to the sleeve 3, whose drive lugs 4 fitting in the grooves 5 for the torque further to the composite roll 6 of the composite roll and via the metallurgical bond A further to the carbide ring 7. is determined by the sleeve 3 and is fixed via the sleeve 8 by the nut 9 with extra fixing screw 10.

Figur 2 visar en valskonstruktion, där vridmomentet överförs från valsaxeln 1 via kilen 2 i kilspåret 3 till kompositvalsens seg- järnsdel 4 och via den metallurgiska bindningen A vidare till hårdmetallringen 5. Mellanhylsan 6 bestänuner Valsringarnas inbördes axiella läge, som fixeras via hylsan 7 av muttern 8 med fixerings- skruven 9.Figure 2 shows a roller construction, where the torque is transmitted from the roller shaft 1 via the wedge 2 in the wedge groove 3 to the composite roller part 4 of the composite roller and via the metallurgical bond A further to the cemented carbide ring 5. The intermediate sleeve 6 determines the mutual axial position of the roller rings. 8 with the fixing screw 9.

Figur 3 visar en kompositvalsring som monteras på fri axeltapp, dvs valsspindeln saknar bärlager på ena sidan av valsringen. Det vridande momentet överförs genom friktion i valsringens hål av den koniska hylsan 2, som drivs upp på valsaxelns 1 koniska del, till kompositvalsens segjärnsdel 3 och via den metallurgiska bindningen A till hårdmetallringen 4.Figure 3 shows a composite roll ring which is mounted on a free shaft journal, ie the roll spindle lacks bearing bearings on one side of the roll ring. The rotating torque is transmitted by friction in the hole of the roller ring of the conical sleeve 2, which is driven up on the conical part of the roller shaft 1, to the ductile iron part 3 of the composite roller and via the metallurgical bond A to the cemented carbide ring 4.

Kompositvalsar med hårdmetallringar ingjutna i segjärn har provats i trådverks slut- och mellansträckor, såväl på valskroppar med lagertappar i båda ändar som på fri axeltapp. Vidare har de provats som armeringsjärns-, rör- och matarvalsar. Deras prestanda har väl överensstämt med erfarenheterna sedan 1965 av hårdmetall i varm- valsar. De begränsade hårdmetalldimensionerna och drivningen via drivdon i segjärnet öppnar för användning även i stångvalsverk, kallvalsverk och andra valsapplikationer.Composite rollers with cemented carbide rings cast in ductile iron have been tested in the end and intermediate sections of wire mesh, both on roller bodies with bearing pins at both ends and on free shaft pins. Furthermore, they have been tested as rebar, pipe and feed rollers. Their performance has been in line with the experience since 1965 of cemented carbide in hot rollers. The limited cemented carbide dimensions and the drive via actuators in the ductile iron also allow for use in bar rolling mills, cold rolling mills and other rolling applications.

Claims (1)

1. 464 226 'ß Pantentkrav Valsring företrädesvis för varm- och/eller kallvalsning, vid vilken valsbanan utgörs av en eller flera hårdmetallringar ingjutna i en valsstomme av en järnlegering, kännetecknad av att gjutlegeringen består av ett väsentligen grafitiskt gjutjärn, som efter gjutningen innehåller 5-30, företrädesvis 15-20 viktsprocent restaustenit, vilken vid efterföljande ett eller flera värmebehandlingssteg helt eller delvis under volymökning omvandlas till huvudsakligen bainit i avsikt att reducera eller helt eliminera den efter avsvalningen efter gjutningen uppkomna differentiella krympningen hos gjutjärnet relativt hårdmetallen. iM1. 464 226 'ß Patent claim Rolling ring preferably for hot and / or cold rolling, in which the rolling path consists of one or more cemented carbide rings cast in a rolling body of an iron alloy, characterized in that the casting alloy consists of a substantially graphitic cast iron, which after casting contains 5 -30, preferably 15-20% by weight of residual austenite, which in subsequent one or more heat treatment steps is completely or partially converted during volume increase to mainly bainite in order to reduce or completely eliminate the differential shrinkage of the cast iron relative to the cemented carbide after cooling after casting. iM
SE8804503A 1988-12-13 1988-12-13 ROLLING RING, COMPOSITION OF HEAVY METAL AND MOLDING AND SET FOR MANUFACTURING THEREOF SE464226B (en)

Priority Applications (15)

Application Number Priority Date Filing Date Title
SE8804503A SE464226B (en) 1988-12-13 1988-12-13 ROLLING RING, COMPOSITION OF HEAVY METAL AND MOLDING AND SET FOR MANUFACTURING THEREOF
AU45850/89A AU615125B2 (en) 1988-12-13 1989-12-04 Roll ring, comprising cemented carbide and cast iron, and method for manufacture of the same.
BR898906357A BR8906357A (en) 1988-12-13 1989-12-08 LAMINATION RING
ZA899448A ZA899448B (en) 1988-12-13 1989-12-11 Roll ring,comprising cemented carbide and cast iron
ES198989850432T ES2042071T3 (en) 1988-12-13 1989-12-12 ROLLER RING, INCLUDING CEMENTED CARBIDE AND CAST IRON AND METHOD FOR THE MANUFACTURE OF SUCH RING.
DE89850432T DE68907702T2 (en) 1988-12-13 1989-12-12 Tungsten carbide and cast iron rolling ring and manufacturing method.
DD89335556A DD296011A5 (en) 1988-12-13 1989-12-12 ROLLING RING
JP1320708A JPH0699776B2 (en) 1988-12-13 1989-12-12 Composite roll ring
EP89850432A EP0374116B1 (en) 1988-12-13 1989-12-12 Roll ring, comprising cemented carbide and cast iron, and method for manufacture of the same
CA002005220A CA2005220C (en) 1988-12-13 1989-12-12 Roll ring, comprising cemented carbide and cast iron, and method for manufacture of the same
AT89850432T ATE91725T1 (en) 1988-12-13 1989-12-12 ROLLING RING OF CARBIDE AND CAST IRON AND METHOD OF MANUFACTURE.
KR1019890018461A KR960007504B1 (en) 1988-12-13 1989-12-13 Roll ring comprising a ring of cemented carbide
US07/449,820 US5044056A (en) 1988-12-13 1989-12-13 Roll ring comprising a ring of cemented carbide metallurgically bonded to a cast iron body
US07/658,651 US5104458A (en) 1988-12-13 1991-02-21 Method for manufacture of a roll ring comprising cemented carbide and cast iron
US07/813,921 US5167067A (en) 1988-12-13 1991-12-27 Method of making a roll with a composite roll ring of cemented carbide and cast iron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8804503A SE464226B (en) 1988-12-13 1988-12-13 ROLLING RING, COMPOSITION OF HEAVY METAL AND MOLDING AND SET FOR MANUFACTURING THEREOF

Publications (3)

Publication Number Publication Date
SE8804503D0 SE8804503D0 (en) 1988-12-13
SE8804503L SE8804503L (en) 1990-06-14
SE464226B true SE464226B (en) 1991-03-25

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Application Number Title Priority Date Filing Date
SE8804503A SE464226B (en) 1988-12-13 1988-12-13 ROLLING RING, COMPOSITION OF HEAVY METAL AND MOLDING AND SET FOR MANUFACTURING THEREOF

Country Status (12)

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EP (1) EP0374116B1 (en)
JP (1) JPH0699776B2 (en)
KR (1) KR960007504B1 (en)
AT (1) ATE91725T1 (en)
AU (1) AU615125B2 (en)
BR (1) BR8906357A (en)
CA (1) CA2005220C (en)
DD (1) DD296011A5 (en)
DE (1) DE68907702T2 (en)
ES (1) ES2042071T3 (en)
SE (1) SE464226B (en)
ZA (1) ZA899448B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU657296B2 (en) * 1991-02-11 1995-03-09 Sandvik Ab A roll including a cemented carbide ring cast into a cast iron body
GB9409322D0 (en) * 1994-05-10 1994-06-29 Keg Services Ltd Container
CN1050074C (en) * 1994-11-17 2000-03-08 宝山钢铁(集团)公司 Combined rollers for continuous rolling of alloyed nodular iron
SE504707C2 (en) * 1995-07-14 1997-04-07 Sandvik Ab Composite wall with cemented carbide and cast iron
CN1067443C (en) * 1998-10-15 2001-06-20 冶金工业部北京冶金设备研究院 Multi-element w-alloy cast iron roll collar and its making technology
EP2508670B1 (en) 2011-04-04 2013-08-21 Cellwood Machinery AB Refining disc or refining disc segment
PL2508262T3 (en) 2011-04-04 2014-05-30 Cellwood Machinery Ab Method of provision of a fuel
JOP20200150A1 (en) 2011-04-06 2017-06-16 Esco Group Llc Hardfaced wearpart using brazing and associated method and assembly for manufacturing
DE102014214640A1 (en) 2014-07-25 2016-01-28 Ford Global Technologies, Llc Method for producing a component from heat-treated cast iron

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3549430A (en) * 1967-11-14 1970-12-22 Int Nickel Co Bainitic ductile iron having high strength and toughness
US3609849A (en) * 1969-04-09 1971-10-05 Jan M Krol Forming rolls
SE371114B (en) * 1971-01-08 1974-11-11 Seco Tools Ab
US3860457A (en) * 1972-07-12 1975-01-14 Kymin Oy Kymmene Ab A ductile iron and method of making it
SE399911C (en) * 1976-02-05 1980-02-18 Sandvik Ab Wear detail with high durability and good toughness, composed of solid metal and cast iron
JPS5767145A (en) * 1980-10-09 1982-04-23 Toshiba Tungaloy Co Ltd Superhard alloy for plastic working
JPS61176408A (en) * 1985-01-31 1986-08-08 Kubota Ltd Composite ring roll
JPH0627289B2 (en) * 1985-02-28 1994-04-13 株式会社クボタ Method for producing a strong paddy composite roll for the net part
SE8502514L (en) * 1985-05-22 1986-11-23 Volvo Ab PROCEDURE FOR MANUFACTURING A BAINITHERED SAIL

Also Published As

Publication number Publication date
DE68907702D1 (en) 1993-08-26
DE68907702T2 (en) 1993-10-28
AU4585089A (en) 1990-06-21
DD296011A5 (en) 1991-11-21
CA2005220C (en) 2000-03-14
EP0374116B1 (en) 1993-07-21
JPH02243736A (en) 1990-09-27
ES2042071T3 (en) 1993-12-01
KR900010021A (en) 1990-07-06
ATE91725T1 (en) 1993-08-15
KR960007504B1 (en) 1996-06-05
AU615125B2 (en) 1991-09-19
EP0374116A1 (en) 1990-06-20
JPH0699776B2 (en) 1994-12-07
CA2005220A1 (en) 1990-06-13
ZA899448B (en) 1990-09-26
SE8804503L (en) 1990-06-14
BR8906357A (en) 1990-08-21
SE8804503D0 (en) 1988-12-13

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