rolling mill defects

Nov 16, 2017·Rolling mills•Requires very rigid construction, large motors to supply enough power (MN). ...ROLLING DEFECTSAlligatoring: • rupture of material along the length into an upper half and a lower half resembling the open mouth of an alligator. Folds: Thisdefectis …

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  • defects in hot rolled products1 rolling (metalworking

    defects in hot rolled products1 rolling (metalworking

    Transverse crackson theslab edgeslead to these defect during Hot Rolling. Origin / Root Cause • Quenching effect of the slab edges in sec. zone. •Poor ductility.• Deep oscillation marks at the edges. Remedy / Process Control • Reduce water in secondary cooling zone. • Control mould level fluctuation. Body Line Slivers

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  • chatter problems on a cold rolling mill innoval

    chatter problems on a cold rolling mill innoval

    Strip marking can result from forced vibrations acting on the work rollsand may beamplified by naturalresonances of the rolling mill. These natural resonances are typically between 500 and 1000Hz and are often referred to as the 5 th octave resonances of the mill

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  • rolling mill defects speaking of precision blog

    rolling mill defects speaking of precision blog

    Millshearing is usually detected visually and appears longer than scabs. also, the surface below thedefectis smoother and more uniform than found below scabs. Excessive rubbing of the steel as it rolls through themillcauses overheating , shearing material off the bar, which is later picked up frommillcomponents on the same or another billet

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  • different types of rolling mills and defects inrolled

    different types of rolling mills and defects inrolled

    Jun 05, 2020· 1.1 Two-highrolling mills: 1.2 Three-highrolling mills: 1.3 Four highrolling mills: 1.4 Tandemrolling mills: 1.5 Clusterrolling mills: 2Defectson rolled metals: 2.1 Wavy edges crack: 2.2 Zipper crack in the centre of the strip: 2.3 Edge crack:

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  • defects in hot rolled products1 rolling(metalworking

    defects in hot rolled products1 rolling(metalworking

    • Use of ISD in FinishingMill. 3. Sliver / Seams.DefectDescription: Irregular flaky overlapping material with non-metallic inclusions or scales under it. It is found along therollingdirection and can appear on both surfaces. Sometime also called seams, shell. Possible causes: 6 • Slag or nonmetallic material entrapment during casting

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  • defecton rolls inrollingmills

    defecton rolls inrollingmills

    1. Hotrollingandrolling defects: 1.1 Front and back. 1.8Rolling defects:Millspring is adefectin which the rolled sheet is thicker than the required thickness because, the rolls get deflected by highrollingforces. Elastic deformation of themilltakes place. If we use stiffer rolls, namely roll material of high stiffness or get price

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  • chatter problems on a coldrolling mill innoval

    chatter problems on a coldrolling mill innoval

    They looked fordefectsin the work roll bearings inner races that were likely to create similar markings to the ones experienced in the coldrolling mill, as shown in figure 3. Thesedefectswere present in all themillwork rolls and were likely created during the chocking and de-chocking operations

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  • cold rolledsheet (roll) common defects, characteristics

    cold rolledsheet (roll) common defects, characteristics

    2Rollingsteel: The residual crucible on the surface of the slab is not cleaned and remains on the steel plate afterrolling. Iron oxide scale. Thedefectsare spotted, strip-like or scaly black spots, the distribution area is not the same, and the depth of the pressing is different

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  • 6common steel defects encountered during quality

    6common steel defects encountered during quality

    May 02, 2017· The repeat distance and pattern gives clues about thedefect’s root cause. On repeating roll marks, the distance from mark to mark gives a clue as to which roll (at themillor processing line) induced the mark. Buckle. A buckle is a series of waves, usually transverse torollingdirection, varying in severity and frequency

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  • (pdf)analysis of the surface defectsin a hot rolled low

    (pdf)analysis of the surface defectsin a hot rolled low

    Sep 26, 2020· Many surfacedefectscaused by hotrollingare related to oxidation in the reheating furnace. One of these is the melting of eutectic FeO/Fe2SiO4 during reheating over 1170°C giving as a …

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  • clamping down on thealligatoring defectin sheet metal

    clamping down on thealligatoring defectin sheet metal

    Clamping Down on theAlligatoring Defectin Sheet MetalRolling. When you are using arolling mill, you want smooth and perfectly-shaped metal for one of many different applications. If the rolled metal moves out of place or the machine malfunctions, you might end up with a split piece of metal through its width, leading a dent or thinned out area

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  • rolling of metals process and principles (with diagram)

    rolling of metals process and principles (with diagram)

    Therollingprocess is shown in Fig. 2.1:Rollingis done both hot and cold. It is accomplishes inrolling mills. Arolling millis a complex machine having two or more working rollers, supporting rollers, roll stands, drive motor, reducing gear, flywheel, coupling gear etc. Rollers may be plain or grooved depends upon the shape of rolled product

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  • full surface defect detection in hot conditionsfor steel

    full surface defect detection in hot conditionsfor steel

    The industrial conditions make the surface of therolling milldirty for inspection, causing spots and marks that are difficult to differentiate from true surfacedefects. Likewise, based on the type of material (batch, thickness, diameter), the product’s surface can greatly vary …

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  • defecton rolls inrollingmills

    defecton rolls inrollingmills

    1. Hotrollingandrolling defects: 1.1 Front and back. 1.8Rolling defects:Millspring is adefectin which the rolled sheet is thicker than the required thickness because, the rolls get deflected by highrollingforces. Elastic deformation of themilltakes place. If we use stiffer rolls, namely roll material of high stiffness or get price

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  • explain rolling defects

    explain rolling defects

    Defectsinrollingcan be primarily categorized as . a. General. b. Operational . a. General. Thedefectsmay arise due to. i. Surface irregularities: The ingot or the raw material may be having irregularities due to scaling which will get trapped in the metal and remain inside the metal surface as laps. This needs to be removed by grinding and there will be metal loss.If thedefectis deep

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  • rollingprocess definition, types, coldrolling defects

    rollingprocess definition, types, coldrolling defects

    Nov 29, 2020· The rolls are supported in bearings housed in sturdy upright frames (called stands) which are grouted to therolling millfloor. The provision for adjusting the gap between the rolls is available. ... Mention the two types ofrolling defects. Surfacedefects. Structuraldefects

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  • detect and identify all periodicdefectsin the hot

    detect and identify all periodicdefectsin the hot

    Hot Rolling. Optimized material and production costs are achieved by early detection of periodicdefectsin thehot rolling mill. Our inspection solution provides early and precisedefectidentification throughout the entire production step. This allows users to pinpoint thedefect…

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  • clamping down on thealligatoring defectin sheet metal

    clamping down on thealligatoring defectin sheet metal

    Clamping Down on theAlligatoring Defectin Sheet MetalRolling. When you are using arolling mill, you want smooth and perfectly-shaped metal for one of many different applications. If the rolled metal moves out of place or the machine malfunctions, you might end up with a split piece of metal through its width, leading a dent or thinned out area

    Learn More
  • steeldefects speaking of precision blog

    steeldefects speaking of precision blog

    Typicallyrolling millreheat cycles offer plenty of time to develop a subscale in a prior existingdefect. However, fordefectsthat are created duringrolling, the limited time at temperature and the decreasing temperatures on cooling make formation of subscales unlikely. Reading Decarb and Subscale to Understand theDefect

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  • everything you need to know about flatteners and levelers

    everything you need to know about flatteners and levelers

    Sources of ShapeDefects. Themillshave come a long way in the last few years in controlling shape and thickness, but perfection is difficult. You need to understand this--not because you're going to be in therolling millbusiness, but because you must be realistic when talking to themillsabout your expectations for product quality

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  • highest anti pressure strength jaw crusher in Tamil Nadu

    highest anti pressure strength jaw crusher in Tamil Nadu

    Single ToggleJaw Crusheris ideally suitable for primary and secondarycrusherfor material with compressionstrengthless than 320mpa.Jaw crusheris ofhighcrushing ratio, larger capacity, well-distributed final product size, simple structure, reliable performance, convenient maintenance, lower operation cost, etc. it is widely used in

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    used mobile stone crushers in german for sale

    Henan Liming Heavy Industry Science & Technology Co., Ltd., Experts in Manufacturing and ExportingMobile Crusherplant,Stone Crusherand 1200 more Products. A Verified CN …

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  • commercial micro gold wash plant in Chattisgarh

    commercial micro gold wash plant in Chattisgarh

    Feb 08, 2018· JXSC Small and Portable gold wash plant withtrommel,fully Customizable & moveable. Equip with the sluice box, gold centrifugal concentrator, shaker table, goldtrommel, sand washing machine, vibrating feeders, vibrating screen, pumps, and the like portable mining equipment according to different conditions. 【 Capacity 】Customizable 1-300TPH

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    10x36 single pass jaw crusher detroit diesel sand conveyor

    10x36 single pass jaw crusher detroit dieselmobilejaw crusheris designed to crush the large materials and screen the crushed materials 10 21536 single pass jaw crusher detroit diesel sand conveyorheavy equipment for sale

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    mineral processing systems in Assam crusher for sale

    StoneCrusherMachine Cost, Ore Crushing Plant Equipment Price. cementcrushermachines price in Kenya. 10–100 TPH stone crushing machine supplier cost for stonecrusherplant DBM . Japan 300 tph vertical cement grinding mill prices,Grinding mill maintenance and . What is the factory price of jawcrusher for salein Kenya crushing plant

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  • Rock crusher Plant 45 El Jay cone

    Rock crusher Plant 45 El Jay cone

    Rock Crusher's/ Screen.El-Jaymodel 1145 portable closed-circuit crushing and screeningplantcomplete withEl-Jay45" Rollercone Classic standard cone crusher with 125 h.p. electric motor …

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    performance used granite crusher machine for sale

    21,443crusherforgraniteproducts are offered forsaleby suppliers on Alibaba.com, of whichcrusheraccounts for 86%, plastic crushingmachinesaccounts for 1%. A wide variety ofcrusherforgraniteoptions are available to you, such as 6 months, 3 months

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  • jaw crusher manual grinding mill Delhi

    jaw crusher manual grinding mill Delhi

    Pulverizer,Crushermanufacturers,Crushersuppliers,Crusher…. This increases the use frequency of the concretecrusher… the application range of thejaw crusherChina …

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  • stone primary jaw crusher machine supplier for sale in Sikkim

    stone primary jaw crusher machine supplier for sale in Sikkim

    Jaw Crusher[ Capacity ]: 1-700 t/h [ Applicable Material ]:Jaw crusheris a kind ofstonecrushingmachinewhich is widely used asprimaryor secondarycrusher. Baichy manufactures coarsejaw crusherand finejaw crusherin stationary type or mobile type

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  • China Fluorite Dryer

    China Fluorite Dryer

    ChinaBall Press supplier,Dryer, Crusher Manufacturers/ Suppliers - Gongyi Cowin Heavy Manufacturing Plant

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  • netzch ball milling

    netzch ball milling

    RETSCH is the world leading manufacturer of laboratoryballmills and offers the perfect product for each application. The High EnergyBall MillE max and MM 500 were developed for grinding with the highest energy input. The innovative design of both, the mills and the grinding jars, allows for continuous grinding down to the nano range in the shortest amount of time - with only minor warming

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    iron ore mobile crushing plants kenya

    Tph goldore crushing plantinkenyadec 25 2018iron crushing crusher plant kenyagambeleonardoiron crushing crusher plant kenyatph basalt crusherplantinkenyathe gypsum ores is first to be crusher portable rock crusher crusher for salekenyagoldore crusher mobile crusherand sorters complete ore beneficiationplant400tph in sharda

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    understanding and use of the secondary crusher

    Depending on the application, impactcrusherscan have higher wear costs, higher maintenance, and produce more fines. Impactcrushersmay be used as a primary,secondary, or tertiarycrusherdepending on the producer’s final-product-size needs. Thesecrushersare available in …

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  • coal crusher for coal jaw crusher in Maharashtra

    coal crusher for coal jaw crusher in Maharashtra

    Smart Automation OfferingCoalCrushing EquipmentCoalCrushing Machine कोयला को कुचलने वाली मशीन Mining Metals in Kothrud PuneMaharashtraRead about company Get contact details and address ID 5808944433...We are a professional mining machinery manufacturer, the main equipment including:jaw crusher, conecrusherand other sandstone equipment;Ball

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