6
Optimization of Sand Castng Process Parameters for Ferrous Material by Using Design of Experiments
Authors: Adarsh Kumar and Jagjit Singh
Number of views: 388
ABSTRACT : Casting is a age old production technique wherein cavities are formed by a pattern into a porous
and refractive material, usually sand, and then liquid metal is poured into the cavity so that it takes up the shape
of the cavity, thus forming the required metal product. Various properties of sand such as grain fineness number,
green compressive strength, refractive ness, clay content, moisture, mould strength, etc have an appreciable effect
over the produced casting [1]. An experimental study was conducted to study the effect of three parameters,
namely, moisture content of sand mould, the clay content of sand mixture and grain fineness number of sand on
the tensile strength of the casting produced. Experiments were planned using the strategy of design of experiments,
level and range of input parameters i.e. moisture, clay content and grain size were selected and then experiments
were conducted [8,14]. In each run, the tensile strength of obtained casting was measured using the Universal
Testing Machine [12]. Some considerations were put up for the hardness number, visual blow holes, surface
finish, pin holes etc. Since we took into account three factors, the use of Taguchi method was made, a total of
nine sand mixtures were made for the application of L9 technique [14]. These samples were then put to test for
tensile strength and analysis was conducted for the collected data to study the main effects. Optimization was
done by Taguchi Technique [2].