Jul
18
2007
IngenierÃa
The intelligent casting production: How to use automation to improve the economics of near net shape castings
Kjell Holmen
DISA Industries, Denmark
67th World Foundry Congress
In the foundry and metal working industry, globalisation has meant new and larger markets, accelerated production cycles, increased demands on product quality and standardisation, and, of course, keen competition among foundries. In order to stay competitive in this scenario, this paper suggests automation as an intelligent and cost-effective solution to timeconsuming
and arduous manual routines in the foundry. Following the introduction of t...
Jul
11
2007
Fundición
Safety cast components for the automotive industry. The metallic charge, the presence of micro elements and their most relevant effects.
Ramón Suárez Creo, Julián Izaga Maguregi, José A. Goñi Güemes.
Azterlan Metallurgical Research and Foundry Centre
67th World Foundry Congress
The Automotive Industry keeps on demanding increasing requirements to
the cast components. The critical situation generated by the extraordinary
price increase of the raw materials has not meant any flexible position, on
the contrary, new stronger demands reappear according to the constant
development of the market.
Economical reasons, market demands and weight reduction policies
introduce new concepts in the sheet steels used in the car...
Jul
11
2007
Fundición
Chunky graphite in ductile iron castings.
R Källbom *, K Hamberg ** and L-E Björkegren *
*Swedish Foundry Association, ** Chalmers University of Technology. Sweden.
Non-spherical graphite morphology is detrimental on the mechanical
properties of ductile iron castings. This includes the branched and
interconnected chunky graphite that occasionally occurs in the thermal
center of castings. In this work the graphite morphology in ferritic ductile
iron that contained chunky graphite was studied. Chunky graphite was
shown to be a progressively degenerated morphology of spherical
graphite. Attempts to inv...
Jul
11
2007
Fundición
Investigation of Crack Generation under the Influence of Thermal Stress during Cast Process.
Si-Young Kwak, Nam Jung Ho, Sung-Wook Lee, Jeong-Tae Kim, Jeong-Kil Choi
Korea Institute of Industrial Technology, South Korea. 67th World Foundry Congress
Metallugical properties of cast materials and casting conditions effect on
the various defects. Especially the stress has influence on the defect such
as hot tear or cold crack. There are lots of needs for the thermal stress
analysis in casting process to control the defects concerning crack
generation or distortion during casting. In this paper, we studied the
relationship between thermal stress and crack generation using numerical
meth...
Jul
11
2007
Tratamientos térmicos
Thermomechanical Treatment of Austempered Ductile Iron.
A A Nofal, H Nasr El-din and M M Ibrahim
Central Metallurgical Research and Development Institute, (CMRDI), Cairo, Egypt. 67th WFC
This work aims at studying the influence of thermomechanical
treatment, either by ausforming just after quenching and before the onset of
austempering reaction or either by cold rolling after austempering.
In the first part of this work, ausforming of ADI up to 25% reduction in height
during a rolling operation was found to add a mechanical processing
component to the conventional ADI heat treatment, thus increasing the rate of
ausferrit...
