The problems encountered in casting grey iron parts with wall thicknesses of 0.125 in. or less are in the areas of controlling the metallurgical structure, the chemical analysis, and varying cooling rates. Special test molds have been designed to determine the structure of grey irons of varying wall thicknesses. Spectrographic chemistry determination techniques are available for fast and accurate determination of all metallic elements when they are in percentages above 0.1%. Equipment is available for determining the cooling curve of grey irons. Changes in structure and chemistry however must be evaluated by use of statistical techniques, using various charts. Dimensional control problems are handled by rules of design. Casting finish problems are controlled by engineering.
Control of Quality in Metal Properties, Dimensional Accuracy, and Surface Finish
Sae Technical Papers
Pre-1964 SAE Technical Papers ; 1906
01.01.1963
Aufsatz (Konferenz)
Englisch
AN INVESTIGATION INTO DIMENSIONAL ACCURACY AND SURFACE FINISH ACHIEVABLE IN DRY TURNING
British Library Online Contents | 2009
|EFFECT OF ADDITIONAL FACTORS ON DIMENSIONAL ACCURACY AND SURFACE FINISH OF TURNED PARTS
British Library Online Contents | 2013
|Breakthrough in aerospace machining times, accuracy and surface finish
Emerald Group Publishing | 2003
Accuracy control for the final finish of mega-yachts
Tema Archiv | 2007
|Engineering Index Backfile | 1939