scholarly journals The Role of Operational Factors in Shaping of Wear Properties of Alloyed Austempered Ductile Iron Part I. Experimental Studies Abrasive Wear of Austempered Ductile Iron (Adi) in the Presence of Loose Quartz Abrasive/ Rola Czynników Eksploatacyjnych W Kształtowaniu Właściwości Zużyciowych Stopowych Żeliw Sferoidalnych Ausferrytycznych Część I. Eksperymentalne Badania Zużycia Sciernego W Obecności Lużnego Scierniwa Kwarcowego Żeliw Adi

2014 ◽  
Vol 59 (4) ◽  
pp. 1653-1662 ◽  
Author(s):  
A.N. Wieczorek
Keyword(s):  
Phase Transition ◽  
Ductile Iron ◽  
Experimental Studies ◽  
Industrial Applications ◽  
Operating Conditions ◽  
Austempered Ductile Iron ◽  
Linear Wear ◽  
Wear Properties ◽  
Plastic Properties ◽  
Austempering Temperature

Abstract The paper presents the results of the wear tests of alloyed austempered ductile iron performed on a specially designed test rig simulating real operating conditions for chain wheels which were selected for testing due to their complex rolling and sliding form of contact between elements. The chain wheels subjected to tests were operated with the use of loose quartz abrasive and without it. The studies involved the determination of strength and plastic properties, hardness distributions, microstructure and linear wear of the ADI in question considered as a function of the austempering temperature. Based on the results obtained, the following was found: phase transition of austempered ductile iron can take place for combinations typical of industrial applications, a non-linear increase in the wear as a function of the austempering temperature occurs, an increase in the hardness of all the analysed types of ADI takes place during the operation without the presence of abrasive, the phase transition of austenite into martensite in ADI with a lower content of austenite requires higher loads as compared with cast iron containing 40% of austenite.

scholarly journals The Role of Operational Factors in Shaping of Wear Properties of Alloyed Austempered Ductile Iron Part II. an Assessment of the Cumulative Effect of Abrasives Processes and the Dynamic Activity on the Wear Property of Ausferritic Ductile Iron/ Rola Czynników Eksploatacyjnych W Kształtowaniu Właściwości Zużyciowych Stopowych Żeliw Sferoidalnych Ausferrytycznych Część II. Ocena Skumulowanego Działania Scierniwa I Wymuszeń Dynamicznych Na Właściwości Zużyciowe Sferoidalnych Żeliw Ausferrytycznych

2014 ◽  
Vol 59 (4) ◽  
pp. 1663-1671
Author(s):  
A.N. Wieczorek
Keyword(s):  
Ductile Iron ◽  
Impact Resistance ◽  
Operating Conditions ◽  
Linear Wear ◽  
Wear Property ◽  
Wear Properties ◽  
Cast Irons ◽  
Combined Action ◽  
Austempering Temperature ◽  
The Impact

Abstract The study presents results of the second part of wear tests of austempered ductile irons on a specially designed test rig that allows simulating the real operating conditions of chain wheels. The chain wheels subjected to testing were operated in conditions characterized by combined action of loose quartz abrasive and an external dynamic force. The studies involved the determination of the hardness, microstructure and linear wear of the ADIs in question considered as a function of the austempering temperature and the austenite content. Based on the results obtained, the following was observed: a decrease in the wear as a function of the austempering temperature and thus in the content of austenite in ADIs; a slight deformation of graphite after completing the wear test involving external dynamic forces; a negative linear dependence between the linear wear and the impact resistance. It was found that the increased wear of cast irons with a lower content of austenite may be caused by the propagation of cracks initiated by damage to graphite nodules, while in the conditions characterized by combined action of abrasive wear and dynamic load the cast irons with a higher content of austenite and higher impact resistance have better wear properties.

Experimental Studies on Abrasive Wear of Surface-Hardened and Shot Peened Alloy Cast Steels

2016 ◽  
Vol 674 ◽  
pp. 201-206
Author(s):  
Andrzej Norbert Wieczorek
Keyword(s):  
Abrasive Wear ◽  
Cast Steel ◽  
Experimental Studies ◽  
Operating Conditions ◽  
Linear Wear ◽  
Plastic Properties ◽  
Cast Steels ◽  
Wear Tests ◽  
Alloy Cast

The paper presents the results of wear tests of shot-peened and non-shot-peened cast steels with the use of an especially designed test rig simulating real operating conditions of chain wheels. The chain wheels subjected to tests were operated with the use of loose quartz abrasive. The studies involved the determination of strength and plastic properties, hardness distributions, microstructure and linear wear of the selected cast steels. Based on the results obtained, the following was found: the abrasive wear of cast steel chain wheels increased after shot peening.

scholarly journals Austempered Ductile Iron (ADI): Influence of Austempering Temperature on Microstructure, Mechanical and Wear Properties and Energy Consumption

Metals ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 53 ◽  
Author(s):  
Prabhukumar Sellamuthu ◽  
D. Samuel ◽  
D. Dinakaran ◽  
V. Premkumar ◽  
Zushu Li ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Ductile Iron ◽  
Austempered Ductile Iron ◽  
Wear Properties ◽  
Austempering Temperature

Effect of austempering temperature on microstructure of ausferrite in austempered ductile iron

2019 ◽  
Vol 35 (11) ◽  
pp. 1329-1336 ◽  
Author(s):  
Chengduo Wang ◽  
Ruizhuo Liu ◽  
Songjie Li ◽  
Chang Gu ◽  
Xueshan Du ◽  
...  
Keyword(s):  
Ductile Iron ◽  
Austempered Ductile Iron ◽  
Austempering Temperature

Research on the Effective Rules for the Impact Toughness and Hardness of Austempered Ductile Iron (ADI) by Austempering Parameters

2014 ◽  
Vol 488-489 ◽  
pp. 3-8 ◽  
Author(s):  
Gao Lian Shi ◽  
Shao Hua Wu ◽  
Xu Hong Guo ◽  
Xing Huang
Keyword(s):  
Impact Toughness ◽  
Ductile Iron ◽  
Austempered Ductile Iron ◽  
Finite Element Software ◽  
Hardness Tests ◽  
Numerical Simulation Methods ◽  
The Common ◽  
Austempering Temperature ◽  
The Impact ◽  
Ansys Workbench

With the common engineering-purpose ductile iron used as research subject, the research on rules of austempering parameters to influence the impact toughness and hardness of austempered ductile iron (ADI) was implemented in this paper by adopting the combination of theoretical, experimental and numerical simulation methods, and setting series of austempering parameters; After the impact tests and hardness tests simulated by the finite element software - ANSYS Workbench, the simulation data were analyzed by comparing with the experimental data. The experimental results showed that: austenitizing time was longer, ADI hardness was smaller while impact toughness remained unchanged; hardness was in linearly-decreasing trend with rise of austempering temperature, while impact toughness first increased and then decreased as the austempering temperature rose, with the maximum at the temperature 350°C; The effect of austempering time on the impact toughness was very few; extension of austempering time allows the hardness to increase slightly, but only a little.

Abrasive Wear Behavior of Permanent Moulded Toughened Austempered Ductile Iron

2009 ◽  
Author(s):  
T. R. Uma ◽  
J. B. Simha ◽  
K. Narasimha Murthy
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Ductile Iron ◽  
Wear Behavior ◽  
Structural Features ◽  
Abrasive Wear Resistance ◽  
Austempered Ductile Iron ◽  
Graphite Morphology ◽  
Abrasive Wear Behavior ◽  
Austempering Temperature

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.

EXPERIMENTAL STUDIES ON THE INFLUENCE OF ABRASIVE MATERIALS ON THE WEAR OF HARD-WEARING STEELS

Tribologia ◽  
2018 ◽  
Vol 281 (5) ◽  
pp. 133-141 ◽  
Author(s):  
Andrzej N. WIECZOREK
Keyword(s):  
Experimental Studies ◽  
Structural Steels ◽  
Operating Conditions ◽  
Ring Test ◽  
Test Rig ◽  
Wear Properties ◽  
Aggressive Action ◽  
Low Wear ◽  
Loss Of Mass ◽  
Wear Tests

The paper presents the wear properties of hard-wearing steels and structural steels used in mining and transport machines exposed to the aggressive action of the environment, which have been determined experimentally in the presence of diverse abrasive materials. The wear tests were carried out on a ring-on-ring test rig simulating the operating conditions of elements exposed to abrasive wear. The samples were subjected to tests in conditions of sliding contact, and the main destructive process was micro-cutting of the surface with loose corundum or quartz grain. In the case of the coal abrasive, only slight grinding in of the mating surfaces was observed. The loss of mass in the samples was measured as the parameter characterizing the wear. It was then used to determine the volume loss. Based on the results obtained, it was found that the wear resistance of hard-wearing steels was approximately four times higher as compared to S355J2 structural steel for the corundum and quartz abrasives. In the case of the coal abrasive, there was a relatively low wear for all of the materials examined.

Effect of Austempering Temperature on Microstructure and Properties of Carbidic Austempered Ductile Iron

2011 ◽  
Vol 284-286 ◽  
pp. 1085-1088 ◽  
Author(s):  
Jin Hai Liu ◽  
Guo Lu Li ◽  
Xue Bo Zhao ◽  
Xiao Yan Hao ◽  
Jian Jun Zhang
Keyword(s):  
Impact Toughness ◽  
Ductile Iron ◽  
Abrasion Resistance ◽  
Field Testing ◽  
Austempered Ductile Iron ◽  
Abrasive Resistance ◽  
Microstructure And Properties ◽  
Zero Rate ◽  
Austempering Temperature ◽  
The Impact

The microstructure and properties of austempered ductile iron with carbides was studied to increase the abrasive resistance of ADI. It was proven that the austempering temperature influences greatly the microstructure, impact toughness, hardness and abrasion resistance of CADI. With increase of austempering temperature, the acicular ferrite becomes thicker and bigger, the impact toughness rises, and the hardness decreases. But there is a complicated effect of austempering temperature on wet abrasion resistance. In addition, the CADI grinding balls were cast and the field testing was performed. The CADI ball is one third of abrasion loss of low chromium cast iron, zero rate of breakage and no loosing round.

Sign in / Sign up

Export Citation Format

Share Document