2020. 11. 11. · White cast iron is a type of carbon-iron alloy that contains carbon content greater than 2% in the form of cementite. The name white cast is derived from its white surface, which is caused by carbide impurities that allows cracks throughout the metal. When fractured it exhibits a silver-like (white) fracture.

Hypoeutectic White Iron with 25%Cr after Heat Treatments It was found that both a refined microstructure and less interconnected 

The microstructure of white CI contains massive cementite (white) and pearlite. White cast iron derives its name from the white, crystalline crack surface 

2022. 9. 8. · White iron is too brittle for use in many structural components, but with good hardness and abrasion resistance and relatively low cost, it finds use in such applications

It was shown that primary and eutectic austenite revealed a slight difference in lattice parameter and secondary carbides precipitated in the microstructural matrix of the white iron were of the form (Fe,Cr)23C6and had a cubic crystal structure.

There are also differences in composition—cast iron contains 2–4% carbon and other alloys, and 1–3% of silicon, which improves the casting performance of the 

The dark-gray areas represent the former austenite dendrites that transformed to pearlite (the eutectoid microstructure, alternating layers of Fe 3 C and α- 

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2021. 8. 16. · 2.3 Control the as-cast microstructure of solidification and phase transformation (1) the martensite is refined by multi-element alloying with V, Mo, Cu, Mn, and so on. (2) the mixture of rare earth + bismuth + magnesium + potassium + calcium was used to treat the liquid iron by a two-step method, that is, adding the modifying agent into the furnace and the ladle,

Their microstructure is characterized by the presence of Cr-rich M 7 C 3 type carbides and a modifiable (ferrite, austenite, martensite) matrix.

2013. 7. 18. · Abstract. High chromium white irons are ferrous based alloys containing 11–30 wt-% chromium and 1.8–3.6 wt-% carbon, with molybdenum, manganese, copper, and nickel sometimes added as additional alloying elements. The microstructure of these alloys typically consists of hard primary and/or eutectic carbides in a matrix of austenite or one of its

The as-cast microstructure of Fe-Cr-C-V white irons consists of [M.sub.7][C.sub.3] and vanadium rich [M.sub.6][C.sub.5] carbides in austenitic matrix.

2014. 7. 20. · The effect of alloying and cooling conditions on the microstructure and properties of complexly-alloyed iron intended for operation under the action of abrasive conditions is considered. Irons alloyed with Cr, Nb, B, Si, Mn, and Ti are studied. A change in chemical composition and crystallization conditions has a marked effect on experimental alloy

Grey cast iron is characterized by its graphitic microstructure, which causes fractures of the material to have a grey appearance. It is the most commonly used cast iron and the most widely used cast material based on weight. Most cast irons have a chemical composition of 2.5-4.0% carbon, 1-3% silicon, and the remainder is iron.

The microstructure of the high boron white cast iron comprises a dendritic matrix and interdendritic eutectic boride M 2 B in as-cast condition, where M represents Cr, Fe, or Mn. The boride morphology is much like that of carbide in high chromium white cast iron, but its microhardness is higher than carbide.

The microstructure of this so-called white cast iron therefore contains only cementite instead of graphite. Only after subsequent heat treatment, annealing, does the metastable cementite disintegrate into its final flake graphite form and then belongs to group of the grey cast iron. The micrograph below shows malleable iron with 2.7 % carbon.

Keywords: hypoeutectic white cast iron, image processing and analysis, mathematical morphology, artificial neuronal network, image quantification. Page 2. 2. 1.

Microstructure-property relationships in high chromium white iron alloys High chromium white irons are ferrous based alloys containing 11–30 

The microstructure of white CI contains massive cementite (white) and pearlite. White cast iron derives its name from the white, crystalline crack surface observed when a casting fractures. Most white cast irons contain less than 4.3% carbon, with low silicon contents to inhibit the precipitation of carbon as graphite.

Cementite is hard and brittle and dominates the microstructure of white cast iron. Thus, white cast iron is hard and brittle and has a white 

White cast iron has a Vickers hardness of 500-600 10), and so the hardness values are somewhat high, which is due to precipitation hardening by Cu in α-Fe. The hardness of annealed Cu-10 mass% Sn alloys is approximately 110 11) , in agreement with the hardness value obtained for Cu alloy areas.