Microstructure, wear behavior and surface hardening of austempered ductile iron

Laboratory abrasive wear tests have been reported on permanent moulded toughened austempered ductile iron. The influence of austempering temperature on the abrasive wear behavior have been studied and discussed. The results indicate that with increase in austempering temperature from 300°C to 350°C, the abrasive wear resistance increased, and as the austempering temperature increased to 400°C, there was reduction in the abrasive wear resistance. These results have been interpreted based on the structural features and graphite morphology.

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Effect of laser surface hardening on the microstructure, hardness and residual stresses of austempered ductile iron grades

Applied Surface Science ◽

10.1016/j.apsusc.2011.03.059 ◽

2011 ◽

Vol 257 (16) ◽

pp. 7101-7106 ◽

Cited By ~ 58

Author(s):

C. Soriano ◽

J. Leunda ◽

J. Lambarri ◽

V. García Navas ◽

C. Sanz

Keyword(s):

Residual Stresses ◽

Ductile Iron ◽

Surface Hardening ◽

Laser Surface ◽

Austempered Ductile Iron ◽

Laser Surface Hardening

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Effect of Phenomena Accompanying Wear in Dry Corundum Abrasive on the Properties and Microstructure of Austempered Ductile Iron with Different Chemical Composition

Archives of Metallurgy and Materials ◽

10.1515/amm-2015-0078 ◽

2015 ◽

Vol 60 (1) ◽

pp. 483-490 ◽

Cited By ~ 1

Author(s):

D. Myszka ◽

A. Wieczorek

Keyword(s):

Mechanical Properties ◽

Wear Resistance ◽

Ductile Iron ◽

Surface Hardening ◽

The Other ◽

Austempered Ductile Iron ◽

High Wear Resistance ◽

New Materials ◽

Heat Treated ◽

Mining Machinery

Abstract The research described in this article is a fragment in the series of published works trying to determine the applicability of new materials for parts of the mining machinery. Tests were performed on two groups of austempered ductile iron - one of which contained 1.5% Ni and 0.5% Mo, while the other contained 1.9% Ni and 0.9% Cu. Each group has been heat treated according to the three different heat treatment variants and then the material was subjected to detailed testing of mechanical properties and abrasion wear resistance, measuring also hardness and magnetic properties, and conducting microstructural examinations. The results indicated that each of the tested materials was senstive to the surface hardening effect, which resulted in high wear resistance. It has been found that high temperature of austempering, i.e. 370°C, favours high wear resistance of ductile iron containing nickel and molybdenum. Low temperature of austempering, i.e. 270°C, develops high wear resistance in ductile iron containing nickel and copper. Both these materials offer completely different mechanical properties and as such can be used for different and specific applications.

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Abrasive wear behavior of austempered ductile iron with niobium additions

Wear ◽

10.1016/j.wear.2019.203065 ◽

2019 ◽

Vol 440-441 ◽

pp. 203065 ◽

Cited By ~ 1

Author(s):

Amanda Souza Oliveira Pimentel ◽

Wilson Luiz Guesser ◽

William José Rodrigues Custódio da Silva ◽

Pedro Dolabella Portella ◽

Mathias Woydt ◽

...

Keyword(s):

Abrasive Wear ◽

Ductile Iron ◽

Wear Behavior ◽

Austempered Ductile Iron ◽

Abrasive Wear Behavior

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The Role of Bainite in Wear and Friction Behavior of Austempered Ductile Iron

Materials ◽

10.3390/ma12050767 ◽

2019 ◽

Vol 12 (5) ◽

pp. 767 ◽

Cited By ~ 3

Author(s):

Fulin Wen ◽

Jianhua Zhao ◽

Dengzhi Zheng ◽

Ke He ◽

Wei Ye ◽

...

Keyword(s):

Wear Resistance ◽

Ductile Iron ◽

Volume Fraction ◽

Wear Behavior ◽

Lower Bainite ◽

Austempered Ductile Iron ◽

Isothermal Quenching ◽

Micro Hardness ◽

Friction Behavior ◽

Upper Bainite

The austempered ductile iron was austenitized at 900 °C for 1 h and quenched in an isothermal quenching furnace at 380 °C and 280 °C, respectively. This paper aims to investigate the effects of bainite on wear resistance of austempered ductile iron (ADI) at different loads conditions. The micro-structure and phase composition of ADI was characterized and analyzed by metallographic microscope (OM), X-ray diffractometer (XRD) and scanning electron microscope (SEM) with energy dispersive spectroscopy (EDS). The results showed that the volume fraction of retained austenite in ADI is reduced with the increase of austenitizing temperature. Meanwhile, the two kinds of ADI samples showed varied wear resistance when they were worn at different loads conditions. For wearing at a load of 25 N, the wear resistance of ADI mainly depends on matrix micro-hardness. Thus, ADI with lower bainite structure has higher hardness and leads to better wear resistance. When wearing at a load of 100 N, the increase of micro-hardness of upper bainite was significant. As a consequence, upper bainite showed superior friction and wear behavior. It was also found that the form of wear behavior of ADI changed from abrasive wear to fatigue delamination as the wear load increased from 25 N to 100 N according to the observation on worn surface.

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Wear Behavior of an Austempered Ductile Iron Containing Mo-Ni-Cu

Materials Science Forum ◽

10.4028/www.scientific.net/msf.475-479.199 ◽

2005 ◽

Vol 475-479 ◽

pp. 199-202 ◽

Cited By ~ 4

Author(s):

Sasan Yazdani ◽

M.A. Rahimi

Keyword(s):

Ductile Iron ◽

Applied Load ◽

Wear Behavior ◽

Strong Dependence ◽

Wear Test ◽

Ring Test ◽

Austempered Ductile Iron ◽

Test Machine ◽

Controlling Mechanism ◽

Austempering Temperature

The aim of the this investigation is to study the influence of Ni on tribiological behavior of an austempered ductile iron (ADI) containing Mo, Ni and Cu. Ductile irons with chemical composition Fe-3.56%C– 2.67%Si –0.25%Mo–0.5%Cu and Ni contents of 0.8 and 1.5% were cast into standard Y-blocks. Wear test samples were machined off from the bottom section of blocks. Austenitizing heat treatment was carried out at 870°C temperature followed by austempering at 270, 320, and 370°C for 5-1140 minutes. The wear test was carried out by using block-on-ring test machine. Sliding dry wear behavior was studied under applied loads of 50, 100 and 150N. The results show that wear resistance is independent of austempering temperature with an applied load of 50N, but there is a strong dependence at higher austempering temperatures with applied loads of 100 and 150N. Wear mechanism is described as being due to subsurface fatigue, with cracks nucleated at plastically, deformed graphite interfaces. The wear controlling mechanism is the crack growth when wear shows a dependence on applied load and austempering temperature.

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