Effect of Si Content on the Microstructure and Wear Resistance of High Chromium Cast Iron

Optimization, by Means of a Design of Experiments, of Heat Processes to Increase the Erosive Wear Resistance of White Hypoeutectic Cast Irons Alloyed with Cr and Mo

“…During the process of erosive wear peeling of this layer could occur, thus failing to provide further wear resistance. Spectra 5,6,9,12,13 and14 show the approximate weight percentages of the elements that constitute the eutectic carbides M7C3 and the eutectic constituent, formed by martensite, retained austenite and secondary carbides, which are located outside the nitride layer. Figure 5 shows the phases and constituents that were analyzed semi-quantitatively by energy-dispersive X-ray (EDX) microanalysis in the nitrided layers of Experiments 5 to 8.…”

“…One such alloying element is chromium, which allows martensite to form by air cooling [1]. However, wear resistance is improved if the precipitation of chromium-rich secondary carbides [6,7], uniformly distributed in a predominantly martensitic matrix, is promoted and if the percentage of retained austenite is reduced [8].These secondary carbides are precipitated as a result of the destabilization of austenite at temperatures around 1000 • C or higher [4,7,[9][10][11][12][13][14][15][16][17][18][19]. This precipitation favors an increase in the M s temperature, reducing the risk of cracking in cooling media with harsher cooling conditions than air [1].…”

Effect of (Ti, Mo)_xC Particle Size on Wear Performance of High Titanium Abrasion-resistant Steel

“…Particle-reinforced steels containing a high volume fraction of carbide, nitride, boride, and/or oxide particles have garnered increasing interest, because of their high specific modulus and strength, thermal stability, and excellent wear resistance. [1][2][3][4] Similarly, TiC is attractive as a reinforcing material in particle-reinforced steel because of its low density (~4.93 g/cm 3 ), high melting point (~3 430 K), extreme hardness (2 859-3 200 HV), high Young's modulus (~440 GPa), and high resistance to oxidation and wear. [5][6][7][8] There are two main ways to obtain a high volume fraction of TiC particles in an alloy: through liquid state processing or solid state processing.…”

UQ eSpace

“…For alloy A the carbides are of hexagonal shape and exhibited different structures with different orientations. For alloy B, the microstructure had finer eutectic carbides as compared to alloy A [10]. On observation using an SEM, austenitic matrix was observed in alloy A and pearlitic matrix in the alloy B.…”

“…% were studied. These alloys were melted in the induction furnace and cast into a cylindrical metal mould [10]. The chemical composition of the HCCI has been provided in Table 3.…”