| Description |
ix, 93 leaves : illustrations, photographs ; 29 cm |
| Summary |
"The purpose of this investigation was to measure the effectiveness of an inoculant alloy reacting with molten cast iron in a reaction chamber properly located in the gating system. The chemical composition of the gray iron was held constant while several metallurgical factors were varied to produce test samples with different cementite thicknesses. These chill depths were measured as an indication of the inoculation effectiveness. Appreciable differences in chilling tendency were observed within the different variables studied. The results indicate that pouring temperature, as well as the other variables studied, are of considerable importance when dealing with inoculation of gray iron where the inoculant alloy is' placed in the reaction chamber. Under the experimental conditions employed, ferrosilicon gives an adequate dissolution rate at temperatures around 1300°C. Both hemispherical and conical reaction chamber designs lead to a high and uniform dissolution. The most effective alloy size seems to be around 0.023 inches. The amount of 20 grams of FeSi shows the most efficient solution at 1300°C. Some reduction in the degree of inoculant dissolution occurred as the area of the choke increases. Sprue and reaction chamber must be separated from each other"--Abstract, leaf ii. |
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