中國有色金屬學(xué)報(bào)(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 21 No. 4 April 2011 |
high-pressure diet cast AM60B magnesium alloy
（1. State Key Laboratory of Automotive Safety and Energy,
Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;
2. Key Laboratory of Advanced Structural Materials of Ministry of Education,
Department of Materials Science and Engineering, Changchun University of Technology, Changchun 130012, China）
Abstract:Standard mechanical test bars with a diameter of 6.4 mm and a gauge length of 50 mm were processed, and the microstructures of die cast AM60B alloy under different die casting process parameters were observed. The influences of the slow shot speed, the fast shot speed and the biscuit thickness on the externally solidified crystals (ESCs) were investigated. With the increase of the biscuit thickness, the number of the ESCs in the cast samples decreases. Under a low slow shot speed, larg ESCs are found in the cast structure and a high fast shot speed results in more spherical ESCs. The relationships between ESCs and process parameters were also discussed.
Key words: AM60B magnesium alloy; die casting; microstructure; externally solidified crystals
