Dec
17
2007
Engineering
HIPing – A potent post casting treatment for high integrity aluminium castings
R.M.PILLAI
Regional Research Laboratory (CSIR), India
67th World Foundry Congress
The increasing use of high integrity Al castings for repeated loading
applications warrants improved fatigue properties as well. The principal
cause for the lower fatigue properties and reliability of aluminium castings
is the presence of defects and inhomogenities, which are the preferred
fatigue initiation sites. Hot Isostatic Pressing (HIPing) is a powerful post
casting treatment for eliminating defects like shrinkage porosity and
hyd...
Dec
17
2007
Engineering
Production of ductile iron castings without feeders
Rudolf Val. Sillén*
* NovaCast Technologies AB, Sweden
67th World Foundry Congress
The paper focuses on the mechanisms behind shrinkages in cast iron and
how they can be avoided. Grey and ductile iron are unique casting alloys
due to their solidification behaviour. During solidification the alloys initially
contract when the temperature drops from the pouring temperature to the
liquidus temperature. This contraction must always be compensated for by
supply of feed metal from the gating system and often also from a feede...
Dec
10
2007
Management and marketing
Metal Casting’s Secret Ingredient
William W. Sorensen
Executive Director, Foundry Educational Foundation, Schaumburg, IL USA
67th World Foundry Congress
This paper describes the work of the Foundry Educational Foundation
FEF, in the USA to support students working in the metal castings industry.
The paper describes how the FEF works in conjunction with the American
Foundrymen’s Society, AFS, the castings industry and educational
establishments to support the developments of the industry future leaders
in the American castings industry.
Dec
10
2007
Management and marketing
Aerospace Castings – The Future Challenge
David E. Jakstis
Spirit Aerosystems Wichita, Kansas USA
67th World Foundry Industry
Castings have been employed on the earliest airplanes produced and
continue to contribute to the structural systems of aircraft today. With the
competitive drive to reduce aircraft costs, castings have been able to
provide production solutions that reduce manufacturing costs, reduce part
requirements, reduce assembly cycle time, and even reduce the weight.
Despite these contributions, there has been a reluctance to design aircraft
with c...
Dec
10
2007
Light alloys
Effect of melting and casting conditions on aluminium metal quality
Derya DISPINAR, John CAMPBELL
Department of Metallurgy and Materials, University of Birmingham, UK.
67th World Foundry Congress
A study in a secondary alloy ingot producing plant was targeted to
investigate the metal quality change in the holding furnace during
secondary remelting of aluminum alloy LM24 (Al-8Si-3Cu-Fe). The
investigation was an attempt to understand the effect of (i) the use of
diffusers (porous plugs integrated into the body of the furnace) and (ii)
casting techniques involving different degrees of turbulence.
Casting density and bifilm index we...
