Nov
22
2007
The foundry industry and the environment
Occupational exposure to chemical agents in the portuguese foundry industry
J C Costa
Instituto de Soldadura e Qualidade, Pt.
67th World Foundry Congress
This paper reports on a project on occupational exposure to chemical
agents developed in the Portuguese foundry industry on 2000-2002,
involving a sample of 15 foundries. A total of 148 exposure profiles to
crystalline silica, metallic dust and fumes, total dust and mineral oil mist
were determined through monitoring within the 234 similar exposure
groups identified. The profiles are described in terms of statistical
distributions whenev...
Nov
22
2007
Advanced simulation techniques
Prediction of the influence of microstructure, porosity and residual stresses on strength properties of aluminum castings
R Baehr *, M Todte * and H Stroppe **.
* University of Magdeburg, Germany, ** Institute of High Technologies and Edu. Germany
67th World Foundry Congress
It is necessary for a design engineer of castings to precisely know the mechanical
properties (yield strength, tensile strength, elongation to fracture,
strain hardening exponent and so on) of every part of the casting. These
are very closely connected to the locally very different cooling- and solidification
preconditions of the melt. Estimating strength properties through all
the varying characteristics of the cast structure (dendrite s...
Nov
22
2007
The foundry industry and the environment
How to link OSHA requirements to Kyoto`s demands for protection of climate?
Rolf Kurtsiefer.
KMA GmbH, Koenigswinter, Germany.
67th World Foundry Congress
Since the idea of the “white foundry” was born, managers focussed a lot of
their environmental activities on meeting the OSHA-requirements for
occupational health: A look into a modern foundry shows impressive
improvements of air quality inside the shop.
Nevertheless the foundries activities for fume removal often could not yet
solve the problem of working in accordance with the aims of sustainability:
Increasing exhaust air rates in mod...
Nov
22
2007
Advanced simulation techniques
Research on mould filling process of melt in vertical centrifugal casting
Guo Jingjie, Li Changyun, Wu Shiping, Fu Hengzhi
Harbin Institute of Technology, Harbin, P.R.China
67th World Foundry Congress
Mould filling of melt in vertical centrifugal casting is a complex process,
which is governed by a number of processing variables. In this paper, a
complete analysis of mold filling process of melt in vertical centrifugal
casting is accomplished by combining theoretical analysis, numerical
simulation and experiments. Results show that the melt fills the cavity with
varying cross-sectional area and inclined angle. The filling process is
d...
Nov
22
2007
Light alloys
Study on vacuum die casting process of aluminum alloys
HU Bo*, XIONG Shoumei1*, Masayuki Murakami**, Yoshihide Matsumoto**, and Shingo Ikeda**.
*Tsinghua University, Beijing , P.R. China; ** TOYO Machinery & Metal Co. Ltd, Japan
67th World Foundry Congress
The influences of process parameters and vacuum level in vacuum die
casting technology on the density and mechanical properties of ADC12
alloy die castings were studied. Standard die casting tensile testing
specimens were produced on a 650t cold chamber die casting machine
with different vacuum pressures from 5kPa to 100kPa and different casting
pressures from 66.7MPa to 22.7MPa. Other operating conditions were
kept constant. Density, ul...
