Nodular gray cast iron having properties superior to conventional can be produced by treating the molten so that, when cast, graphite will compacted rather than in flake form. One such treatment involves introduction of magnesium (Mg) into a bath composition. It is principal object present industrial experiments provide an improved process for ductile production. Another which permits efficient...

The influence of aluminium on the microstructure of austempered ductile cast iron (ADI) has been studied. The presence of well distributed graphite in the matrix, and a relatively high volume fraction of retained austenite are responsible for the good mechanical properties of the Aluminium alloyed austempered ductile irons including excellent wear resistance, higher resistance to thermal shock,...

ni-hard4 white cast iron is excellent wear resistant material and has been widely used in wearaffected equipment operated under extreme conditions, such as in mineral processing, cement, copper and iron manufacturing. in this study the effect of titanium addition (1.2, 0.7 and 0.2 wt.%) to the ni-hard 4 cast iron with the nominal composition of si= 1.5%, mn=0.5%, c=3%, p=0.05%, s= 0.05%, mo= 0....

honing is a process for finishing surfaces to obtain smooth surface. this process is used for finalpolish of inner parts such as engines cylinders. optimizing this process has always been a bigchallenge for mass production of cylinder blocks of internal combustion engines. honing processhas some variable parameters, thus to get their optimum rates the automobile cylinders were tested.in this re...

The research investigates the effect of varying amounts aluminium (1.05, 1.575, 2.29, 3.02 and 3.74 wt.%) addition heat treatment (austempering at 300, 350, 400 oC) on microstructure mechanical properties ductile cast iron alloys. graphitizing effects Al alloy varied austempering temperatures hardness, tensile strength, impact toughness (DCI) were evaluated. results influences DCI determined pr...

A phenomenological voidÐcrack nucleation model for ductile metals with second phases is described which is motivated from fracture mechanics and microscale physical observations[ The voidÐcrack nucleation model is a function of the fracture toughness of the aggregate material\ length scale parameter "taken to be the average size of the second phase particles in the examples shown in this writin...

Abstract: Ball mills are used in the last stage of ore processing for grinding raw materials. Forged 70Cr2 alloy steel and Austempered Ductile Iron (ADI) balls are materials from which grinding balls are made for Sarcheshmeh Copper Plant (SCP) ball mills. In the present study wear and impact properties of these two kinds of balls have been investigated. Some balls randomly were selected as ...

At the present stage of reforming housing and public services, toughening requirements for life reliability pipelines municipal support systems, issues developing choosing material type pipes in relation to specific operating conditions urban water supply systems become very relevant. The safety have been main applicable these as most important components health one priorities state social poli...

Abstract Solid-state transformation during heat treatment is of great practical importance because it significantly affects the final structure, properties, and thermal stability cast components. The present study highlights issue structure formation its effect on high-quality iron, namely, austempered ductile iron (ADI). In this study, experiments were carried out for castings with a 25-mm-wal...

One of the methods used to surface hardening ductile iron is chilled cast iron. Chill as fast cooling rate in mold during solidification and chill thickness greatly affects hardness layer. The main material iron, SS 304. Casting uses sand casting method. Before pouring, plate has been inserted onto pattern that formed mold, then preheated at 700°C. Pouring was carried out a melting temperature ...