Effects of Sequential Operation with Heat Treatment and Mechanical Milling on Work Hardening for Superalloy GH4169

Engineering components are usually manufactured with sequential production processes. Work hardening due to previous processes affects the machinability of workpiece in subsequent operations. In this research, surface work a by two heat treatment/milling (HT + M) and milling/heat treatment (M HT) superalloy GH4169 was investigated. First, microstructure characteristics, including plastic deformation grain size machined processed processes, were quantitatively presented. Then, microhardness on its cross-section measured analyzed. Finally, calculation model considering twin boundary proposed. Here, we also present evolution principle It found that degree HT M machining 179%, whereas only 101%. The research results can be applied optimized selection process sequence for manufacturing GH4169.