In material selection, especially in low temperature conditions, one of very important factors it is a ductile to brittle transition temperature, i.e. the temperature when material becomes too brittle to use. In this paper transition temperature determined by impact energy in temperature interval from –196 to +100°C of unalloyed austempered ductile iron with different microstructures have been ...

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 ...

Present investigations involve a systematic study on the machinability of austempered ductile irons (ADI) developed from four commercially viable ductile irons alloyed with different contents of 0, 0.1, 0.3 and 0.6 wt.% of Ni. The influence of Ni content, amount of retained austenite and hardness of ADI on machining behavior has been conducted systematically. Austempering heat treatment was car...

This paper examines the influence of austempering and shot peening on wear resistance ductile iron. Samples for further testing were made from mechanically processed casts. The hardness microstructure iron examined prepared samples. Metallographic analysis cast samples in state determined pearlitic-ferritic structure matrix characteristic this type Pearlite predominates structure, rest consists...

The aim of this investigation is to study the performance of the new generation of the PVD coated grade and to map the influence of cutting conditions on the tool life in milling of ADI (Austempered Ductile Iron). The results show that chipping is the main wear mechanism which determines the tool life in dry condition and notch wear in wet condition for this application. This due to the differe...

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,...

The distribution of the castings production in world, whose total output is more than 112 million tons, considered. A steady trend to replacement rolled alloy steel, which used for critical engineering products, by Austempered Ductile Iron (ADI) outlined. latter ductile cast iron with globular graphite, austempered (isothermally quenched) produce ausferritic (bainitic) structure. dynamics price...

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,...

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...