【摘要】 本研究以压铸AlSi10MnMg合金为基础，重点关注压室预结晶（ESCs-α_I和ESCs-IMC_I）的组织特征和断裂行为。研究发现，粗大的压室预结晶组织在压铸AlSi10MnMg合金断裂过程中发挥着重要作用。在此基础上，通过微合金化的方式细化ESCs-α_I并优化ESCs-IMC_I，开发出了新型免热处理THAS-1压铸合金并实现了其在减震塔零部件上的试制。更多还原

【Abstract】 Based on die casting AlSi10MnMg alloy, the microstructure and fracture behavior of the externally solidified crystals(ESCs-α_I and ESCs-IMC_I) were focused on. The results indicate that coarse ESCs play an important role in the fracture process of die casting AlSi10MnMg alloy. On this basis, ESCs-α_I is refined and ESCs-IMC_I is optimized by microalloying, and a novel heat treatment free THAS-1 die casting alloy is developed to realize trial production for shock tower components.更多还原