Mechanical properties and wear resistance of ZrO2 particulate-reinforced composite layer on compacted graphite cast iron processed by selective laser alloying

In order to enhance surface property of brake materials, compacted graphite cast iron (CGI) with non-smooth surface was processed by laser local processing. This study focuses on the influence of the work media on wear resistance and thermal fatigue resistance of specimens. The results showed that when the work media were air and water respectively, laser local processing could enhance surface property of CGI. Changing work media could not change phase compositions of the laser processing area, but refined their microstructures, which enhanced their micro-hardness. By this way, the specimens’ wear resistance and resistance to thermal crack initiation were further improved, while their resistance to thermal crack propagation was influenced by cracks on bionic units.

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Mechanical properties of compacted graphite cast iron with different microstructures

International Journal of Cast Metals Research ◽

10.1179/1743133614y.0000000118 ◽

2014 ◽

Vol 27 (5) ◽

pp. 275-281 ◽

Cited By ~ 7

Author(s):

R. W. Gregorutti ◽

J. E. Grau

Keyword(s):

Mechanical Properties ◽

Cast Iron ◽

Compacted Graphite ◽

Graphite Cast Iron

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The Effect of Magnesium to Sulfur Ratio on the Graphite Morphology of Graphite Cast Iron Produced at Differrent Section Thicknesses

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.383-390.5880 ◽

2011 ◽

Vol 383-390 ◽

pp. 5880-5885

Author(s):

Omar Elmabrouk ◽

Osama M. Erfan ◽

Ali Kalkanli

Keyword(s):

Mechanical Properties ◽

Cast Iron ◽

Ductile Cast Iron ◽

Flake Graphite ◽

Factors Affecting ◽

Compacted Graphite ◽

Graphite Particles ◽

Graphite Morphology ◽

Graphite Cast Iron ◽

Flake Graphite Cast Iron

This paper is concerned with the investigation of the effect of magnesium to sulfur ratio on the graphite morphology and estimation of the ranges of this ratio use to produce graphite cast iron at different section sections. The main factors affecting shape of graphite cast iron are the metallurgical structures and the section thicknesses. Cast iron of different shapes of graphite particles directly affect its thermo-mechanical properties. The nodular shape of these graphite particles such as in ductile cast iron improve its mechanical properties, on the other hand, when the shape of these graphite particles become elongated such as in flake graphite cast iron results in improving its thermal conductivity. In between, the worm-like shape of these graphite particles such as in compacted graphite cast iron, make this type of cast iron to have thermo-mechanical properties in between those of ductile and flake graphite cast iron. The different types of ductile , compacted and flake graphite cast iron were produced by means of plunger method at different section thicknesses and the effect of Mg/S ratio on these types of graphite particles was investigated and its range was established.

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