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Two heat-treated high-chromium white cast irons with different carbon contents were studied in this research work using compression at 500 °C, and wear and oxidation tests at 500 and 600 °C. The ...
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…
This work analyzes the rate of secondary carbides precipitation during the destabilization heat treatment of a 17% Cr white iron. The experimental iron was characterized in the as-cast conditions to have comparable parameters with the heat treated samples. Destabilization heat treatments were undertaken at temperatures of 900, 1000, and …
One solution to make the work roll wear better is to change the roll material from high-chromium cast iron to high-speed steel (HSS) with better wear resistance [7, 8].
The effect of different tempering temperatures on the microstructure and mechanical properties of high boron white cast iron after air quenching was studied. The experimental results indicate that the high boron white cast iron comprises a dendritic matrix and interdendritic boride M 2 B that distributed in the form of continuous network …
Keywords: High chromium iron roll Chromium carbides Concave fracture 1. Introduction In this article, the results of the failure analysis of HiCr Iron work roll in finishing stand F4 (top position) of a CSP mill have been …
High speed steel rolls have excellent wear resistance, and their service life in finishing mill stands of hot rolling mills is 3~6 times that of high chromium iron rolls, so they are highly ...
Because of the added alloy element such as manganese, chromium, nickel molybdenum, the metallurgical properties of the outer layer is rather high, the work layer of roller almost no change in the depth direction, the number of graphite and working layer with high strength, good toughness and high hardness and degree of hardness drop small features.
Work rolls of hot strip mill: The large- -size high chromium cast iron roll sleeve adopts static casting, and it depends on internal and external cooling to ensure the difference of internal and external performance. This kind of material has better hardness drop, and it guarantees excellent abrasion resistance and anti-spot performance and good red …
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A high chromium (HiCr) iron work roll broke in three pieces in finishing stand 4 in a compact strip production (CSP) mill of a steel company. This roll breakage was examined by means of visual ...
In order to improve the production efficiency and reduce the roll consumption, the test application of high chromium cast iron roll in section steel medium line was carried out.By comparison, the ...
This paper compares and analyzes the solidification structure of two rolls of the same size produced by the same process: one is made of high-carbon sponge iron, a small amount of scrap steel and ...
The effect of tempering and of quenching + tempering including step tempering on the microstructure and properties of centrifugally cast rolls made of high-chromium cast iron HCCI is studied. It is shown that the cast iron microstructure is a matrix consisting of retained austenite and martensite and surrounded by a eutectic.
For example, using disc-on-disc method, Kang et al. (2001) has studied the effect of carbon and chromium additions on the wear resistance and surface roughness of cast high–speed steel rolls, and Pellizzari et al. (2009) has studied hot friction and wear behaviour of high speed steel and high chromium iron for rolls.
High-chromium (Hi-Cr) iron rolls have good wear resistance, but have certain disadvantages in their application to roughing mills. The influence of C and Cr contents on material and mechanical properties were examined.
High speed steel rolls have excellent wear resistance, and their service life in finishing mill stands of hot rolling mills is 3~6 times that of high chromium iron rolls, so they are highly ...
High-speed steel rolls have higher steel passing per groove (times) due to their good wear resistance, which saves roll changing time, improves rolling mill operation rate, reduces roll consumption, and improve the overall efficiency of the factory. Generally, the amount of steel passing in a single groove (times) is 3 to 5 times that of cast iron rolls.
This article investigates the effect of N content on the microstructure, mechanical properties and wear resistance of hypereutectic high chromium cast iron (HHCCI). With the increase of N content, the primary carbides are obviously refined, the austenite content increases, and the dispersed granular Cr 2 N precipitates.
High endurance of the rolls of the last finishing stands is provided by the working layer cast from toughened chromium-nickel iron the structure of which is represented by martensite, eutectic and secondary …
High-chromium cast iron has high hardness and excellent wear resistance and corrosion resistance, and is widely used in slurry pumps, mineral processing, cement production, paper-making and other steel manufacturing industries (Ref 1-3).
Microstructure, hardness and fracture toughness of low and high chromium high speed steel used in hot strip mills and subjected to conventional heat treatment have been examined. The influence of tempering temperatures on the mechanical properties of these products, determined using tensile and fracture toughness tests, was studied in this ...
WISCO ROLL LLC FZ is a leading supplier of cast rolls of high-speed steel, high chrome steel, high chrome iron, high nickel & chrome and BD rolls.
When the chromium levels exceed 20%, high-chromium cast irons exhibit good resistance to oxidizing acids, particularly HNO 3. High-chromium cast irons are resistant to reducing acids. They are used in saline solutions, organic acids, and marine and other acidic industrial atmospheres. These materials exhibit excellent resistance to abrasion, …
Compared with traditional ductile iron rolls and high-nickel-chromium rolls, high-speed steel rolls have higher steel passing per groove (times) due to their good wear resistance, which saves roll changing time, improves rolling mill operation rate, reduces roll consumption, and reduces production. cost, and improve the overall efficiency of the …
cas al alto cromo, desestabilización, recocido, resistencia al desgasteABSTRACT: High chromium white cast iron alloy used in coal grinding components is a material that may present different wear. resistance depending on the thermal treatment used in its manufacturing. In this context, the properties of this alloy, containing 22% chromium …
This study is devoted to the graphite formation in high chromium cast iron (8% Cr) and especially to the determination of the conditions for secondary graphite formation using suitable thermal treatments. The solidification of the studied iron was examined by differential thermal analysis (DTA).
This work analyzes the rate of secondary carbides precipitation during the destabilization heat treatment of a 17% Cr white iron. The experimental iron was characterized in the as-cast conditions to have comparable parameters with the heat treated samples. Destabilization heat treatments were undertaken at temperatures of 900, 1000, …
High-chromium irons have good mechanical properties, high hardness in a cast state, low fluctuation of hardness when properties change. High-chromium irons almost don't concede in fluidity to regular gray cast iron that allows using parts sufficiently difficult form directly after casting without the following machining.
High chromium steel roll is produced by centrifugal compound casting technology, with more than 12% Cr content for the shell's material and high strength nodular cast iron for the core.
Read the latest articles of Case Studies in Engineering Failure Analysis at ScienceDirect, Elsevier's leading platform of peer-reviewed scholarly literature
Based on the performed studies, it was found that the main criteria describing the quality and wear resistance of a roll with working layer of chromium cast iron are: proportion of residual austenite; degree of structure dispersion; chemical composition (ratios Cr/C, Ni/ (Cr/C) and Cr/Ni); carbide phase; mechanical properties; …
