Highsilicone Austempered Ductile Iron

Kochański, Andrzej; Krzyńska, A.; Radziszewski, T.

doi:10.2478/afe-2014-0013

Cited by 7 publications

(8 citation statements)

References 11 publications

(8 reference statements)

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“…The strengths are on similar or higher level compared to the results presented for conventional silicon concentration ADI austempered in similar temperatures [1,2,12]. The current results match well with gained previously with silicon solution strengthened austempered ductile irons despite the difference in austenitisation temperature [7,9].…”

Section: Discussionsupporting

confidence: 89%

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Austempering Experiments of Production Grade Silicon Solution Strengthened Ductile Iron

Soivio

2018

MSF

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Austempered ductile iron provides a feasible way to produce high strength components. However, in heat treatments resulting in highest strengths some of the ductility is lost due to formation of bainitic carbides. The role of silicon in inhibiting the formation of iron carbides in as-cast ductile irons as well as its solution strengthening effect is well known and acknowledged in industry. The effect of silicon on austemperability, resulting microstructures, and mechanical properties of austempered ductile irons with silicon contents with 3.4-3.8 w-% was researched. Quenching and austempering heat treatments were carried out for production grade silicon solution strengthened ductile irons EN GJS 500-14. Results indicate, that it is possible to manufacture a fully ausferritic structure into a silicon solution strengthened matrix and indeed good ductility can be achieved in combination with ultimate tensile strength of 1600 MPa. Segregation of silicon reduces the solubility of carbon into the matrix especially close to the graphite nodules which reduce the stability of carbon stabilized austenite and leads into compromised machinability.

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Section: Discussionsupporting

confidence: 89%

“…There is divergence between the presented equation and equilibrium diagrams. Previous austempering experiments with silicon solution strengthened ductile irons have used austenitising temperature of 900 °C [7,9]. As Larker presented in his invention, high enough austenitising temperature should be used.…”

Section: Introductionmentioning

confidence: 99%

Austempering Experiments of Production Grade Silicon Solution Strengthened Ductile Iron

Soivio

2018

MSF

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“…Ductile iron, in all its varieties, is the fastest-growing replacement for other construction materials in many different applications for the parts of machines working under heavy loads, e.g. agricultural, automotive, mining ones (Barbosa et al, 2015;Colin García et al, 2021;Kochański et al, 2015;Wieczorek et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Rule modeling of ADI cast iron structure for contradictory data

Soroczyński¹,

Biernacki²,

Kochański³

2022

cmms

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Ductile iron is a material that is very sensitive to the conditions of crystallization. Due to this fact, the data on the cast iron properties obtained in tests are significantly different and thus sets containing data from samples are contradictory, i.e. they contain inconsistent observations in which, for the same set of input data, the output values are significantly different.The aim of this work is to try to determine the possibility of building rule models in conditions of significant data uncertainty. The paper attempts to determine the impact of the presence of contradictory data in a data set on the results of process modeling with the use of rule-based methods. The study used the well-known dataset (Materials Algorithms Project Data Library, n.d.) pertaining to retained austenite volume fraction in austempered ductile cast iron. Two methods of rulebased modeling were used to model the volume of the retained austenite: the decision trees algorithm (DT) and the rough sets algorithm (RST).The paper demonstrates that the number of inconsistent observations depends on the adopted data discretization criteria. The influence of contradictory data on the generation of rules in both algorithms is considered, and the problems that can be generated by contradictory data used in rule modeling are indicated.

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“…ADI cast iron, since the development of the technology of its production in the 1970s, has been used in elements working in difficult conditions as well as in parts that require a combination of good strength and wear parameters [7,8,9,10]. Despite good performance characteristics of austempered cast irons, methods for improving their capabilities are continuously being sought for.…”

Section: Introductionmentioning

confidence: 99%

Influence of Shot Peening on Abrasion Wear in Real Conditions of Ni-Cu-Ausferritic Ductile Iron

Wieczorek

2016

Archives of Metallurgy and Materials

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The paper presents results of the wear tests of chain wheels made of austempered ductile iron with various content of residual austenite. The aim of this study was to demonstrate the impact of the dynamic surface treatment (shot peening) on wear properties of surface layers of the chain wheels tested that were subjected to the action of quartz abrasive. Apart from determining the value of the abrasive wear, examinations of the magnetic phase content in the microstructure were carried out and plots of hardness of the surface layer as a function of the distance from the surface and microstructure of the materials were prepared. Based on the results, the following was found: an increase in the abrasive wear and a reduction in the hardness of the surface layer of chain wheels subjected to shot peening, as well as reduction of susceptibility to negative action of the shot for cast irons with the structure of upper ausferrite.

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Highsilicone Austempered Ductile Iron

Cited by 7 publications

References 11 publications

Austempering Experiments of Production Grade Silicon Solution Strengthened Ductile Iron

Austempering Experiments of Production Grade Silicon Solution Strengthened Ductile Iron

Rule modeling of ADI cast iron structure for contradictory data

Influence of Shot Peening on Abrasion Wear in Real Conditions of Ni-Cu-Ausferritic Ductile Iron

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