Investigations of Ferritic Nodular Cast Iron Containing About 5-6% Aluminium

Abstract The work presents results of investigations concerning the production of cast iron containing about 5-6% aluminium, with the ferritic matrix in the as-cast state and nodular or vermicular graphite precipitates. The examined cast iron came from six melts produced under the laboratory conditions. It contained aluminium in the amount of 5.15% to 6.02% (carbon in the amount of 2.41% to 2.87%, silicon in the amount of 4.50% to 5.30%, and manganese in the amount of 0.12% to 0.14%). After its treatment with cerium mixture and graphitization with ferrosilicon (75% Si), only nodular and vermicular graphite precipitates were achieved in the examined cast iron. Moreover, it is possible to achieve the alloy of pure ferritic matrix, even after the spheroidizing treatment, when both the aluminium and the silicon occur in cast iron in amounts of about 5.2÷5.3%.

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Cavitation Erosion of Nodular Cast Iron − Microstructural Effects

Archives of Foundry Engineering ◽

10.1515/afe-2017-0141 ◽

2017 ◽

Vol 17 (4) ◽

pp. 119-122 ◽

Cited By ~ 1

Author(s):

A.W. Orłowicz ◽

M. Mróz ◽

M. Tupaj ◽

A. Trytek ◽

M. Jacek ◽

...

Keyword(s):

Cast Iron ◽

Cavitation Erosion ◽

Nodular Cast Iron ◽

Vibration Exciter ◽

Matrix Component ◽

Ferritic Matrix ◽

Microstructural Effects

Abstract The paper deals with susceptibility of nodular cast iron with ferritic-pearlitic matrix on cavitation erosion. Cavitation tests were carried out with the use of a cavitation erosion vibratory apparatus employing a vibration exciter operated at frequency of 20 kHz. The study allowed to determine the sequence of subsequent stages in which microstructure of cast iron in superficial regions is subject to degradation. The first features to be damaged are graphite precipitates. The ferritic matrix of the alloy turned out to be definitely less resistant to cavitation erosion compared to the pearlitic matrix component.

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Abrasive wear of ploughshare blades made of Austempered Ductile Iron

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis ◽

10.11118/actaun200755010173 ◽

2007 ◽

Vol 55 (1) ◽

pp. 173-182 ◽

Cited By ~ 5

Author(s):

Jiří Votava ◽

Michal Černý ◽

J. Filípek

Keyword(s):

Cast Iron ◽

Abrasive Wear ◽

Ductile Iron ◽

Base Material ◽

Field Tests ◽

Nodular Cast Iron ◽

Austempered Ductile Iron ◽

Spheroidal Graphite ◽

Cast State ◽

Heat Treated

The objective of this article consists in exhaustive monitoring of abrasive wear and subsequent evaluation of nodular cast iron with spheroidal graphite used as the base material for production of ploughshare blades. Nodular cast iron has a lot of convenient properties for production of these components. We have tested this material in field tests. For these tests there were manufactured ploughshare blades (directly according to original). These ploughshare blades were tested in practical conditions of agricultural company Farma Nedvězí Ltd. Three ploughshare blades were used in natural cast state and the others were heat-treated. During the test there were measured decreases of weights of the ploughshare blades and subsequently compared with decreases of original ploughshare blades, produced by company Opall Agri which are ordinarily available at our market.

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The Quantification of Galling in Forming Operations of Hot Dip Galvanized Sheet Metal under Laboratory Conditions

Materials Science Forum ◽

10.4028/www.scientific.net/msf.879.607 ◽

2016 ◽

Vol 879 ◽

pp. 607-612

Author(s):

Jochen Giedenbacher ◽

Anna Elisabeth Raab ◽

Christian Walch ◽

Aziz Huskic

Keyword(s):

Cast Iron ◽

Sheet Metal ◽

Adhesive Wear ◽

Three Dimensional ◽

Nodular Cast Iron ◽

Tool Materials ◽

Laboratory Conditions ◽

Strip Drawing ◽

Forming Tools ◽

Dimensional Surface

In the sheet metal forming industry, tools are subject to mechanical, thermal, chemical and tribological loads. One of the major problems in forming operations of hot-dip galvanized sheet metal is galling (build-up of zinc flakes on the tool). This phenomenon develops gradually as an adhesion on the tool surface. The adhesive wear leads to high rejection and reworking costs for large car body forming tools. Due to economic aspects and the easy castability, the forming tools are made of cast iron. These materials tend to high adhesive wear. The aim of this project is to find a three-dimensional surface parameter, which describes a tribologically advantageous surface of forming tools in order to reduce galling. An additional objective is to optimize tool materials, heat treatment and surface coating. The evaluation of galling under laboratory conditions is based on strip drawing tests. The characterization of tool materials was executed for grey cast iron (EN-GJL-200/250) and nodular cast iron (EN-GJS-700). Investigations demonstrate that the processing methods and test parameters like sliding speed and temperature have a significant influence on galling. Three-dimensional surface parameters have also shown an effect on galling.

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