A study was conducted to isolate the influence of pre-rough machine processing on final dimensional distortion. Methods are discussed to aid process development and minimize dimensional change during carburizing. The study examines the distortion during carburizing between five possible raw materials starting conditions. Coupons were used and manufactured from each population of material processing. All coupons were carburized and hardened at the same time. Dimensions were made before and after carburizing using a scanning coordinate measurement machine. The results show the dimensional distortion during carburizing increased with mechanical and thermal processing.
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