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The effect of niobium addition up to 3.4 wt% on the microstructure and mechanical properties of heat-treated high-Cr cast iron containing 13.5 wt% Cr was investigated. Niobium addition caused small hard NbC particles to precipitate within the proeutectic austenite which impede the development of austenite dendrite growth …
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): …
The abrasive wear and corrosion behavior of as-cast, heat-treated and tempered high chromium white cast iron was studied, and the results were evaluated by means of microstructure, hardness, surface roughness and corrosion resistance. The samples were subjected to wear on the ball-on-flat tribometer test machine under …
The high-alloy white cast irons fall into two major groups: Nickel-chromium white irons, which are low-chromium alloys containing 3 to 5% Ni and 1 to 4% Cr, with one alloy modification that contains 7 to 11% Cr, Chromium-molybdenum irons containing 11 to 23% Cr, up to 3% Mo and often additionally alloyed with nickel or copper. A third group …
Heat treatment allows a precipitation of small particles, named secondary carbides, within the matrix which play a decisive role for the heat-treated high-chromium cast iron properties. In this work, we intend to study the effect of manganese on wear behaviour (friction and abrasion) of high-chromium white cast iron.
Microstructural modifications of as-cast high-chromium white iron by heat treatment. J. Mater. Eng. Perform., 18 (2009), pp. 174-181. Crossref View in ... Effects of a destabilization heat treatment on the microstructure and abrasive wear behavior of high-chromium white cast iron investigated using different characterization techniques. …
Introduction. High-chromium white irons are usually hypoeutectic ones, and they are often used in wear environments, such as mineral processing, cement production and steel manufacturing …
Soft annealing of high chromium white cast iron. Materials Science Forum, 455–456 (2004), pp. 290-294. View in Scopus Google Scholar [9] R.L. Pattyn. ... Behavior of hardness and retained austenite in heat treatment of high chromium cast iron for abrasive wear resistance. Transactions AFS, 112 (2004), pp. 899-910. Google Scholar [13]
The objective of the present work is to establish the heat treating parameters necessary to impose to a pair of high chromium white cast irons a hardness figure in the range from 35 to 40 HRC, acceptable to guarantee a reasonable machinability of the material. Samples of two high chromium white cast irons have been isothermally …
Hypereutectic High Chromium Cast Iron (HHCCI) is a new type of corrosion-wear-resistant material developed from ordinary high chromium cast iron by increasing the chromium and carbon content and is often used in abrasive environments where wear and corrosion interact. The corrosion wear resistance of the HHCCI is related to the …
High Chromium White Cast Iron, or High Cr White Iron grades are used in wear applications that require some corrosion resistance. One common application using High Chrome White Iron alloys is in Pump and Valve parts for the Mining industry. The high chromium content offers the corrosion resistance and the fine carbides dispersed …
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. ... The mechanical behaviour of a low and a high carbon high chromium cast iron was determined by …
1. Introduction. High-chromium white cast irons are ferrous alloys with Cr contents between 12 and 30% and 1.8–3.6% C. The as-cast microstructure is typically composed by a M 7 C 3 carbide network in an austenitic matrix [1, 2].This microstructure provides a good combination of properties such as high hardness, wear resistance and …
Soft annealing of high chromium white cast iron. Materials Science Forum, 455–456 (2004), pp. 290-294. View in Scopus Google Scholar [9] R.L. Pattyn. ...
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 …
Heat Treatment in High Chromium White Cast Iron Ti Alloy KhaledM.IbrahimandMervatM.Ibrahim Central Metallurgical R&D Institute (CMRDI), P.O. Box, Helwan, Cairo, Egypt ... Microstructure. e microstructure of as-cast high chromium white cast iron with no Ti-addition consists of M 7 C 3 carbides that form during solidi …
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. …
Gasan, H. and Erturk, F., Effects of a Destabilization Heat Treatment on the Microstructure and Abrasive Wear Behavior of High-Chromium White Cast Iron Investigated Using Different Characterization Techniques, Metallurgical and Materials Transactions A 44 (11) (2013) 4993 – 5005.
The wear block was cast by high chromium cast iron, and it is properly heat treatment and surface cleaning before casting, but Into the mold after re-heated to temperature above 600 °C,At the ...
There is a huge demand for high-performance materials in extreme environments involving wear and corrosion. High chromium white cast irons (HCWCIs) display better performance than many materials since they are of sufficient hardness for wear protection and can be tailored in chemical compositions to improve corrosion …
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 …
High chromium white cast irons (HCWCI) are widely used as abrasion resistant materials in cement manufacturing, mineral processing and slurry pumping industries. Their high resistance to wear in these demanding situations stems from the presence of hard eutectic (Cr, Fe)7C3 carbides in their microstructures. In this context, …
The influence of heat treatment on microstructure and mechanical properties of high chromium white cast iron alloyed with titanium was investigated.
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 …
white iron were of the form (Fe,Cr)23C6 and had a cubic crystal structure. INTHIDECH, et al[12],studied the effect of alloying elements(Ni, Cu, Mo, V) on heat treatment behavior …
The effects of chromium, nickel, manganese, molybdenum and silicon are discussed in relation to recently developed heat …
Microstructural Investigation on Heat Treatment of Hypoeutectic High Chromium White Cast Irons ... FeTi-FeB was added to molten high chromium white cast iron in amounts of 0.5–2.5 wt% at 50 °C ...
ZHOU Shaoping, et al: Heat Treatment Effect on Microstructure, Hardness and Wear Resistance of Cr26 White Cast Iron ·142· Table 2. Hardness of Cr26 high chromium cast iron with different quenching temperature(HRC) Specimen code Quenching temperatures T/℃ Average hardness H/HRC Range of hardness H/HRC S1 950 59.7 58.9–60.1
The effect of heat treatment temperature on the microstructure and mechanical properties of a Fe–4.0C–18.0Cr–1.0Mo–1.0Ti (wt.%) hypereutectic high chromium white cast iron was investigated. The response of the alloy to heat treatment and, therefore, the microstructures developed, differed significantly.
A detail of the microstructure of iron 4 is shown in Fig. 3 a where a high amount of martensite is observed in the vicinity with the eutectic carbide. The increase of the martensite volume fraction with the increase of the boron addition could seem contradictory with the boron effect reported by the literature for white irons [13] where …
The impact toughness of the alloy increased significantly compared with the conventional cast hypereutectic high chromium white iron (containing 4.0 wt.% C and 17.0 wt.% Cr) without titanium and ...
This work analyzes the effect of different additions of silicon (0 to 5.0 pct) on the structure of a high-Chromium white cast iron, with chromium content of 16.8 pct and carbon 2.56 pct. The alloys were analyzed in both as-cast and heat-treated conditions. Casting was undertaken in metallic molds that yielded solidification rates faster than in …
Moreover, Fernández et al. 12 investigated the wear behaviors of high chromium white cast iron with high and low carbon content. It was found that during …
For example, the hardness (HV 30) of a white cast iron of Fe–3.08C–14.8% Cr (mass%) is 507±15, and the hardness of the cast iron subjected to destabilizing heat treatment at 1100 °C for 2 h following air cooling is only 535±16 [8]. As a consequence, both the avoiding of cracking and markedly improving of the hardness …
High-chromium cast iron (HCCI) is widely used for manufacturing mill rolls due to its high wear resistance, hardness, low cost and good adaptability to manufacture [1,2,3,4].Despite the active application of rolls from high-speed steels, HCCI rolls still occupy a large share of the market [].The cast microstructure of the external layer of …
This article discusses three major groups of the high-alloy white cast irons: nickel-chromium white irons, chromium-molybdenum irons, and high-chromium white irons. Mechanical properties for three white irons representing each of these three general groups are presented as bar graphs.
The influence of heat treatment on microstructure and mechanical properties of high chromium white cast iron alloyed with titanium was investigated. The austenitizing temperatures of 980°C and 1150°C for 1 hour each followed by tempering …