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The high-temperature oxidation resistance of as-cast and heat-treated specimens of a high-chromium white cast iron for hot mill work rolls was investigated by gravimetric means under isothermal oxidation conditions in dry air at 650 °C. Results from the experiments revealed that the chromium content of the matrix and the carbide area …
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Chilled cast iron rolls, work rolls/backup rolls/hss rolls/adamit rolls. LMM GROUP can supply customer with high wear resistance and stablity, high-strength quality rolls. Skip to content +86 411 84174804; info@lmmworkrolls; Mon - Fri: 8:30 - 17:30; Linkedin Youtube Facebook Twitter Instagram. HOME; PRODUCT.
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The volume fraction of eutectic M 7 C 3 type carbide of roll A without waste high chromium cast iron is 23.1%, while the volume fraction of eutectic M 7 C 3 type carbide of roll B added with high ...
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The microstructure of high-chromium cast iron is typical of a hypoeutectic cast iron structure. Fig. 2 is the microstructure of four kinds of rolls after quenching at 1100 °C and tempering at 480 °C; Fig. 3 is the XRD pattern of four kinds of rolls after heat treatment. As shown in the figure, the microstructure of four kinds of high-chromium …
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Founded in 2007, LMM GROUP mainly produces all kinds of metallurgical rolls for various types of steel, bar, high-speed wire and strip hot and cold plate and strip rolling mills. cast iron rolls
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Cast Iron. Ramesh Singh, in Applied Welding Engineering (Second Edition), 2016. High-Chromium Cast Irons (Ni-Hard) These are essentially white cast irons alloyed with 12% to 18% chromium and are popularly known in the industry as Ni-hard.Chromium imparts abrasion resistance and prevents oxidation.
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To clarify the effect of alloying elements on transformation behavior of destabilization heat treated high chromium cast irons, specimens of high chromium hypoeutectic cast irons containing copper and molybdenum were destabilization heat treated at 900, 1000 and 1100°C for 5×102 to 5×104 sec and then rapidly cooled down …
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When the material of the cast iron roll contains high chromium, nickel, and molybdenum alloy elements, it is a high-nickel-chromium infinite chilled cast iron roll, which is produced by full flushing (overflow method) Or centrifugal composite casting Process high nickel chromium infinitely chilled cast iron roll has more carbides in the matrix structure …
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High chromium cast irons (HCCI) have been a material of choice for wear-resistant components in the mining and mineral processing industries for a long time, given their outstanding wear and erosion resistance (Ref 1).The main reason for such resistance can be found in the hard M n C m reinforcement carbides embedded within the metallic …
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2.1. High-chromium white cast iron characteristics High-chromium white cast irons are ferrous alloys containing 11-30% Cr and 1.8-3.6% C along with variable amounts of molybdenum, manganese, copper and nickel [1]. The standard procedure most commonly used for the classification of this kind of cast iron alloy is ASTM A532-10 (2014).
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The HSS rolls have good thermal stability, and the roll surface has high hardness and good wear resistance at rolling temperature. The HSS rolls have good hardenability, and the hardness hardly decreases from the surface of the roll body to the inside of the working layer, thus ensuring that the roll has the same good wear resistance from the outside to …
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1. Introduction. High-chromium white irons are usually hypoeutectic ones, and they are often applied in wear environments, such as mineral processing, cement production and steel manufacturing industries, and so on [1], [2], [3], [4].The considerable M 7 C 3 chromium carbides in high-chromium white irons provide excellent wear …
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The paper is aimed to give an overview on the white cast iron alloys, and particularly high chromium white cast iron alloys, including their classifications, their standard specifications in USA ...
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High-Chromium steel rolls; Semi – steel rolls; Graphite steel rolls; ... The trial data shows that the ∮370mm high-speed steel roll produced by LMMGROUP has far exceeded the single-groove assessment value of 1,500 tons in the "Roll Ordering Technical Agreement", and the effect is good. ... Cast iron rolls; Cast steel rolls;
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High speed steel rolls (HSS) have replaced the traditional high chromium iron rolls (HCI) in many hot strip mills, showing very good results for quality and productivity improvements.
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Brand SDMT; Product origin HEBEI; Delivery time within 75 days after advanced payment; ... High chromium cast iron roll. Thanks to its high content of M7C3, type carbide in range of 20-30% and discontinuous network distribution of carbide, the roll offers a high wear resistance performance. The matrix is finely-disseminated secondary carbides ...
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Sandwich-structured composite plates, in which high-chromium cast iron (HCCI) was cladded by low-carbon steel (LCS), were newly prepared by a hot-rolling process at different reduction rates. The effects of hot-rolling deformation on the microstructure and sliding wear behavior of HCCI were investigated. Experimental …
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The trial data shows that the ∮370mm high-speed steel roll produced by LMMGROUP has far exceeded the single-groove assessment value of 1,500 tons in the "Roll Ordering Technical Agreement", and the effect is good.
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iron work rolls generally contain very high level of chromium (typically about 16–18%) as a high fraction of chromium carbides is desired to achieve a good wear resistance.
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Table 1: Chemical composition of high-chromium wear resistant irons. The mechanical properties of High chromium cast iron HCCI mainly depend on type, size, number, …
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Chromium-containing carbides are easy to precipitate at lower temperatures, reducing the thermal stability of high-speed steel. It has been found [23] that chromium increases the number of M 7 C 3 ...
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High ChromeSteel Rolls. HiCr Steel is characterized by excellent fire crack resistance and very good oxidation behaviour at rolling temperature. Very good wear resistance and constant material properties throughout the …
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High-chromium white cast iron is a common material for the manufacture of the work rolls used in the finishing stands in hot strip mills. The high temperature oxidation behaviour of as-cast and heat-treated high-chromium white cast iron was studied by gravimetric means at 650 °C in atmospheres that included dry air and a mixture of dry …
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Ni-Hard iron castings have shown outstanding in a variety of severe applications including work rolls for hot steel milling. High chromium cast irons and high-speed steel type alloy are also widely used in steel plant, …
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EN-HiCr Iron Rolls Enhanced High Chromium Iron is widely used in early finishing stands of hot strip mills.The microstructure consists of a tempered bainitic/ martensitic matrix with Cr7C3 carbides and MC type carbides …
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In this study, the hot deformation behavior of high-chromium cast iron (HCCI)/low-carbon steel laminates during hot rolling was studied via finite element simulation and experimentation. ... Table 5 shows the peak stress of the LCS/HCCI interface when the laminate passes through the roll gap. Download : Download high-res …
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Now they have basically completely replaced high-chromium cast iron rolls. . The selection of rolls for the same rolling mill is not uniform, and the most suitable …
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Our rolls have the characteristics of high precision, high wear resistance and high fatigue resistance, which can significantly improve the output and product quality of steel rolling mills. Cooperation with us will provide you with stable, reliable and efficient roll solutions to help you achieve your business goals.
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Compared with high-chromium iron rolls, the thermal expansion of high-speed steel rolls is much larger, mainly because the thermal conductivity of high-speed steel is higher than that of high-chromium cast iron (the thermal conductivity of high-speed steel is 25.5W/(m K),
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High chrome casting is a specialized form of cast iron that contains a high percentage of chromium, typically ranging from 12% to 30%. This alloyed composition provides high chrome casting with unique mechanical and physical properties, making it …
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