Prediction of Metallurgic Quality of ICDP Material before Tapping

Válek, Tomáš; Hampl, Jiří

doi:10.1016/j.phpro.2011.11.030

Cited by 5 publications

(4 citation statements)

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“…One of the quality indicators established for the working layer of these rolls is the volume fraction of graphite. Optimal quality is achieved when this percentage falls within the 2 to 5% range [14]. Hence, one of the objectives of manufacturers and users of this type of work roll should be to control both the volume fraction of graphite and its geometry, in addition to knowing how the different variables of the manufacturing process affect these parameters.…”

Section: Introductionmentioning

confidence: 99%

Control over the Percentage, Shape and Size of the Graphite Particles in Martensitic White Castings Alloyed with Cr, Nb and Mg

et al. 2019

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This paper presents the results obtained regarding the control by manufacturers of the percentage, shape, and size of the precipitated graphite in the working layer of duplex work-rolls used in hot strip mill finishing stands. This working layer is manufactured in a martensitic white cast iron alloyed with Cr and Nb to promote the precipitation of M3C and MC carbides, which provide a high wear resistance. The thermal cycling behavior of this layer also has a decisive influence on its service life. In this context, the percentage of graphite and its morphology play a very important role against said thermal cycling. With the aim of studying their effect on the sphericity of graphite, the analyzed industrial manufacturing factors worth highlighting include the liquidus temperature, the %Si, the use of an FeSi inoculant with traces of Lanthanum, inoculation with different amounts of FeB and SiCaMn, and the addition of Mg. At the periphery of the working layer, it was found that the use of the FeSi inoculant with traces of La promoted an increase in the density of counts of graphite, and that inoculation with FeB and the addition of 0.02% Mg diminished the nodularity of the graphite. Furthermore, throughout the entire thickness of the working layer, an increase in the amount of SiCaMn of up to 0.6 kg/T produced an increase in the size of the graphite particles and a marked improvement in their nodularity.

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Section: Introductionmentioning

confidence: 99%

Control over the Percentage, Shape and Size of the Graphite Particles in Martensitic White Castings Alloyed with Cr, Nb and Mg

et al. 2019

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“…14c). The CE-ICDP iron is preferred in hot metal forming as CE-ICDP iron contain free graphite which is perceived to lubricate the contact between the CE-ICDP iron tool and counter surface to avoid sticking and micro-welding [28,43]. Sticking could result in the surface defects of tools and products [44,45].…”

Section: Discussionmentioning

confidence: 99%

“…The microstructure of the cast CE-ICDP iron consists of a martensite matrix, coarse carbides M 3 C type-Fe 3 C (cementite-white), free graphite and secondary carbides along with residual austenite [28,29], see Fig. 3d.…”

Section: Microstructural Investigationmentioning

confidence: 99%

Laser metal deposition of vanadium-rich high speed steel: Microstructural and high temperature wear characterization

Rahman

Capuano

Rooij

et al. 2019

Surface and Coatings Technology

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“…The core layer is casting from cast iron or spheroidal graphite cast iron. The core iron is alloyed with nickel, chromium, manganese and molybdenum [1]. Schematic drawing of the roll and the distribution of layers is in Fig.…”

Section: Introductionmentioning

confidence: 99%

The Comparison of Selected Methods of Cast Iron Spheroidization in Industrial Conditions

Válek¹,

Simon²,

Střílková³

2012

Archives of Foundry Engineering

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Production of spheroidal graphite cast iron is today quite mastered technology. There are many methods achieving the nodular graphite morphology. Each of these methods have specific characteristics and requirements to technical support, properties and the type of applied modifier. Selection of the spheroidization method is dependent on foundry disposition, production character, economic balance, quality requirements, etc. In case of centrifugally casting the core, which fills body and neck of the roll, is created by ductile iron. Considering the sophisticated production of centrifugally cast rolls for hot rolling mills it is necessary to ensure a high reproducibility and reliability of ductile cast iron production quality in the bulk range of 9-18 t per tapping. These conditions are in the Roll Foundry in Vítkovicke Slevarny, spol. s r.o. provided and verified mastered overpour method and the newly injection of cored wire in the melt.

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Prediction of Metallurgic Quality of ICDP Material before Tapping

Cited by 5 publications

References 1 publication

Control over the Percentage, Shape and Size of the Graphite Particles in Martensitic White Castings Alloyed with Cr, Nb and Mg

Control over the Percentage, Shape and Size of the Graphite Particles in Martensitic White Castings Alloyed with Cr, Nb and Mg

Laser metal deposition of vanadium-rich high speed steel: Microstructural and high temperature wear characterization

The Comparison of Selected Methods of Cast Iron Spheroidization in Industrial Conditions

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