An alloy with carbon and chromium in the range of 2.0 to 2.5% and 20 to 25%, respectively, with the addition of Mo and Ni in the range of 1.0 to 1.5% each when heat-treated at a quenching temperature of 1010 °C and tempering temperature of 550 °C produces a hardness in the range of 54 to 56 HRC and a microstructure that consists of discontinuous bands of …
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Abstract: The chemical composition of Cr26 high chromium cast iron and the effects of heat treatment on its hardness, impact toughness were studied in this paper. And its microstructures of this kind of high chromium cast iron treated by different heat treatment technology were studied as well. Their results show that the hardness of the experimental high chromium cast …
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The high chromium white cast iron (HCWCI) has been on the scene for decades, with expectations to remain there due to its exceptional wear resistance. HCWCI is mostly applied as-cast, but it can also be used as a coating material. The carbides in HCWCI microstructure, whose composition depends on alloying and heat treatment regime, give this special feature …
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A Review on Heat Treatment of Cast Iron: Phase Evolution and Mechanical Characterization. October 2022; Materials 15(7109) 15(7109) ... As a result, graphite cast iron's high wear resistance is.
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The detailed deformation mechanism and its microstructural modifications of white cast iron grinding balls used in comminution have been investigated using transmission electron microscopy (TEM) and XRD. De-shaping is the primary mode of ball consumption, and fracture of balls is a relatively uncommon failure mode. Deshaping is the manifestation of abrasive wear …
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The chromium in high chrome white iron reduces the cooling rate required to produce carbides throughout the material, allowing massive castings to be manufactured with carbides throughout their section-thickness …
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Martensitic White Iron (Ni-Hard) Wear Resistant ASTM A 532 High-Chromium Iron (11-28%Cr) Wear, Corrosion, and Heat Resistant ASTM A 532 Graphite Bearing Ferritic 5% Si Iron (Silal) Heat Resistant High (15%) Silicon Iron Corrosion Resistant ASTM A 518, A 518M ... chromium cast irons respond to heat treatment when the carbon and chromium contents ...
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For years it was the go-to alloy for most high wear applications. Now, with most foundries melting high chrome white iron in electric furnaces, and heat treating techniques being perfected, high chrome white iron has become much more popular than Ni-Hard. High chrome white iron alloys are more corrosion-resistant than Ni-Hard; Heat treatment ...
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Heat treatment Finishing the castings Welding Machining ... the hardness of white iron to the abrasive hardness1,2. Hardness ratio (metal: abrasive hardness) ... 0 0.2 0.4 0.6. 6 Properties and applications of Ni‑Hard alloys At a high ratio, abrasion resistance is high, but when the ratio drops below 0.6 there is a wide scatter and the slope ...
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EB specializes in High Chrome White Iron Castings for 20 years. We adopt cast process,send cast processs and so on. ... Our foundry has complete melting, heat treatment and test equipments, such as mid-frequency induction electrical furnaces, quenching and tempering furnaces, blast shot, spectrometer, Rockwell and Brinell Hardness tester ...
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Therefore, the present work highlights on the wear performance of 17 wt% chromium white cast iron modified with different boron contents. The alloys are tested and analyzed in the as-cast condition and after destabilization heat treatment to obtain a maximum hardness and wear resistance.
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XRD Investigation on Heat Treatment of High Chrome White Cast Irons. Article. Full-text available ... 23С6. Keywords: alloying elements, cast state, high-chromium cast iron, heat treatment, phase ...
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In this study, high chrome-based white cast iron (HCWCI) balls were subjected to different heat treatments to yield various amounts of retained austenite, following which they were subjected to ...
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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 matrix, being …
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In the present work, a methodology was developed combining the practical knowledge on the production technology of high Cr cast iron castings with the use of CT to …
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1 Introduction. Cast irons can generally be described as ferrous alloys containing carbon content of ≥2.11 wt.%. They are typically classified into five basic types based on by their graphite morphology [].This includes grey cast iron which has graphite in the form of flakes, ductile or nodular cast iron with graphite present in globular form, malleable cast iron which …
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After heat treatment, discal samples with a diameter of 80 mm for hardness test and samples with a dimension of 10×10×55 mm 3 without groove for Charpy impact test were prepared by cutting balls along their radial directions. The HRC hardness was measured using a Rockwell hardness tester with a load of 150 kg, and the impact toughness was measured with …
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The high chromium white cast iron (HCWCI) has been on the scene for decades, with expectations to remain there due to its exceptional wear resistance. HCWCI is mostly …
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2.1 Sample Preparation and Heat Treatment. Hypereutectic high chromium cast iron was smelted in a 15 kg medium frequency induction furnace. Part of high-carbon ferrochromium and scrap steel was first placed at the bottom of the electric furnace, then ferromolybdenum and ferromanganese were added to mix and heat to melt, and the remaining …
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Explore the production, use, and properties of high-alloy cast irons, particularly high-alloy white irons used in abrasion-resistant applications. Learn about the role of various alloying elements, heat treatment processes, and the three major groups of high-alloy white irons.
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High Chromium Iron is recommended for applications which involve both corrosion and abrasion. Townley's . HC28 alloy is particularly well suited for slurry pump parts and pipe fittings in coal prep operations and coal fired power stations. HC28's abrasion resistance is comparable to chrome-nickel irons (ASTM A-532 Class
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By varying composition and heat treatment, these properties can be ... All high-alloy white irons contain chromium to prevent formation of ... When a martensitic white iron is desired for superior abrasion resistance, additions of 0.5 to 3.0%
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High-chromium white irons are extensively used in applications where good resistance to abrasion wear is required, for example mineral processing, cement manufacturing, and slurry pumping (Ref 1-3).This …
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High chrome white iron grades are commonly used in pump and valve parts for the mining, agricultural, and paper industries with applications that work with stones, rocks, slurry, and cement. ... 25% chrome white iron, are corrosion …
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AI Yunlong, DING Jiayuan, HE Wen, et al. Effects of heat treatment on sliding wear of high chromium white cast iron[J]. Thermal Processing, 2010, 39(3): 46–48. (in Chinese) Google Scholar ZEYTIN H K, YILDIRIM H, BERME B, et al. Effect of boron and heat treatment on mechanical properties of white cast iron for mining application[J].
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The heat treatment of these products consists of a high temperature austenisation followed by quenching and two temperings, required in order to increase their overall hardness and to completely eliminate residual austenite. ... High chromium white cast irons are cast products with hard microstructures composed of an important fraction of ...
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High chrome white cast iron with 90 mm diameter ball sample supplied by Çemaş A.Ş from Turkey has been used. ... in which various heat treatment conditions are established for the samples, is ...
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R.L. Pattyn, Heat treatment of high-Cr white irons, AFS Transactions 93 (1988) 161–167. [10] P.G. Winchell, M. Cohen, The effect of carbon on the hardness of martensite and austenite, Transactions of the Metallurgical Society of AIME 224 (1962) 639. [11] ... Inthidech, P. Sricharoenchai, N. Sasaguri, Y. Matsubara, Behavior of hardness and ...
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30% chrome white iron is the most corrosion resistant of the ASTM A532 iron alloys. It has found a real niche in flue-gas desulfurization, as well as other oxidizing environments and some reducing environments. It is not as abrasion resistant as the other high chrome white iron alloys. Learn More: ASTM A532 Data Sheet 30% Cr
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The high chromium white iron, Cr26, was cast from 1500 ℃ as 80 mm diameter balls into a chilled mold. The chemical composition was given in Table 1. The specimens with dimensions of 12 mm´12 mm´19 mm were used for heat treatment and wear tests, and the specimens were cut from the cast bars, respectively. Cutting was done as slow
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