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 …
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 of hypoeutectic high chromium cast iron, and established the relationship between the amount of alloying elements and hardness as well as the volume fraction of
Carbon (C): White cast iron usually contains a high carbon content ranging from 2.7% to 3.6%.The carbon content contributes to the hardness and abrasion resistance of the material. Chromium (Cr): Chromium is commonly added to white cast iron to enhance its wear resistance and corrosion resistance. The chromium content can range …
68. 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 …
High hardness-toughness and wear resistance of white cast iron treated by a multicycle quenching-partitioning-tempering …
The objective of this study is to investigate effects of heat treatment on wear resistance and fracture toughness in duo-cast materials composed of a high-chromium white cast iron and a low-chromium steel as a wear-resistant part and a ductile part, respectively. Different size, volume fraction, and distribution of M7C3 carbides were employed in the …
High chromium cast iron (HCCI) generally refers to white cast iron with Cr content greater than 12 wt.% and C content of 2 wt.%-4 wt.%, its as-cast structure is mainly composed of M 7 C 3 eutectic carbides and austenite matrix. 1 Due to the presence of these hard carbides, HCCI has excellent wear resistance and has been widely used in …
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 industries, and so on [Citation 1–4].The large quantities of M 7 C 3 chromium carbides in high-chromium white irons provide excellent wear resistance. …
[1] Chen X., Li Y. and Zhang H. 2011 Microstructure and Mechanical Properties of High Boron White Cast Iron with about 4 wt. % chromium Journals of Materials Science 46 957-963 Google Scholar [2] Ngqase M. and Pan X. 2019 ICMM 19 (Hyderabad, India) An overview on high chromium white cast irons Google Scholar [3] …
Tribological performance of high chromium white cast iron and heat‐treated steel used in barite crushing industry. F. Zouch, A. Bahri *, Z. Antar & K. Elleuch. Barite sulfate …
Different combinations of critical and subcritical heat treatments variously modify the initial as cast microstructure of high chromium white cast irons leading to secondary carbide...
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 influence of heat treatment on microstructure and mechanical properties of high chromium white cast iron alloyed with titanium was investigated. …
Tribological performance of high chromium white cast iron and heat-treated steel used in barite crushing industry. F. Zouch, A. Bahri, Z. Antar & K. Elleuch. Scientific …
The initial as-cast microstructure of a high-chromium (2.35% C, 18.23% Cr) white cast iron consisting of primary austenitic dendrites and a eutectic mixture of M 7
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 tempering heat treatment that gives the highest hardness in each product was selected: a double tempering at 525 °C for the low-carbon …
As high chromium irons are quite brittle, the castings are heated slowly in a cold furnace to 650°C to avoid thermal cracking (as these are bad conductors of heat). Complex-castings are allowed a maximum heating rate of 30°C/h, although simple shapes and fully-pearlitic castings can be heated faster.
Abstract. The high chromium white cast iron (HCWCI) has been on the scene for decades, with expectations to remain there due to its exceptional wear …
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 at 260∘ C for 2 hours have been performed and the effect of these treatments on wear resistance ...
Microstructural Investigation on Heat Treatment of Hypoeutectic High Chromium White Cast Irons; An Overview on Types of White Cast Irons and High …
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 rolls …
The effect of heat treatment on the microstructure, hardness and wear resistance of modified hypereutectic high chromium cast iron (HCCI) was investigated. The results show that the quenching treatment partially dissolves the edges of the primary carbides, and the sharp corners become rounded and blunt. As the quenching temperature …
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 ...
K.M. Ibrahim and M.M. Ibrahim [11] studied the effects of heat treatment on the microstructure and mechanical properties of high chromium white cast iron alloyed with titanium. The austenitization ...
This article provides a brief discussion on the heat treatment, mechanical properties, and chemical compositions of high-alloy white cast irons such as nickel-chromium white …
The SEM micrographs of heat-treated basic high-chromium cast iron and 3.66 % Mn-alloyed high-chromium cast iron are shown in Figure 12. Fine particulates in heterogeneous shape are homogenously distributed in the matrix and appear in the basic material (Figure 12a). They are secondary carbides of M 7 C 3 type resulting from heat …
For example, nickel-chromium white-iron castings are given a stress-relief heat treatment because adequately made, they have an as-cast martensitic matrix structure. Tempering is performed between 205°C (400°F) and 260°C (450°F) for at least 4 hours. This tempers the martensite, relieves some of the transformation stresses, and increases ...
Heat treatment. 1. Introduction. The objective of this paper is to present a methodology to apply computational thermodynamics techniques to adjust compositions and heat treatments of high chromium cast irons, obtaining the required properties …
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 …
High chromium cast iron (HCCI) has been widely used as an antiwear material in the industry. Adding inoculants is an effective way to improve the microstructure and mechanical properties of HCCI. In this paper, a new multi-element V-Fe-Ti-Nb-C-Zr-B ribbon inoculant was prepared by the melt-spinning method, and the effect of inoculant …
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 …