Grinding carburization surface removal mechanism considering mechanical—thermal effect and carbon diffusion hardening
摘要
20CrMnTi is applied in the manufacturing industry for hardenability and ductility. However, surface strengthening and precision machining are separated, which affects manufacturing efficiency, extra pollution, and energy consumption. An integrated grinding carburization is proposed, and a material fluent model with experiment is established, considering the mechanical—thermal and carbon diffusion hardening. The surface material removal mechanism varies from ductility to brittleness due to stronger mechanical—thermal coupling. Results denote that the hardness is enhanced by 3.5 times than that of the matrix. The surface material with a thinner and finer structure is beneficial for roughness and residual stress. This study presents not only a surface-integrated modeling method but also an efficient strategy for extreme manufacturing.