| 摘要: | 研究期間：10106~10205;A201 (Al-Cu-Mg-Ag) is a heatable-treated cast aluminum alloy with the highest strength (T6 up to 485 MPa) in cast Al alloys. Its mechanical strength is near the AA2014,AA2024,AA6151 and other high-strength aluminum forging alloys. It is often used in military weapons manufacturing, and other advanced weapons systems. It is also used commercially in automotive engine cylinder cover, piston, connecting rod and the turbocharger etc. Co-operative (Jin-Quanxing company) was order to produce A201 alloy components as air conditioners. Due to the high cost of Ag in A201alloy, cooperative enterprise hope to lower the use of Ag to reduce production costs, without prejudice to the mechanical strength. The limitation of R & D capability in Jin-Quanxing company, can not effectively break through the difficulties.Cooperative enterprises hope to get the grand of the National Science Council that this research can achieve application requirements, in addition, the applicant can expect to get clear of the theoretical basis for the value of academic reference. In recent years, the rare earth elements have been used to develop new functional materials. Resaerch had found that small amounts of rare earth elements, aluminum can significantly change the microstructure, grain refinement, reducing the hot-cracking, and thus enhance the alloy's strength and toughness. In order to improve the casting process of A201 (Al-Cu-Mg-Ag) alloy, we have engaged in A201 casting alloy to add trace rare earth elements (Ce, La) to improve its mechanical properties. and reduce the use of Ag . No research reports showed the rare earth elements (Ce, La) on the microstructure and mechanical properties of A201alloy. This research should be worth exploring. Research methods are summarized as follows 1 Alloy preparation: using alloy design concept, to add elements (Ag, Ce, La, etc.) in A201 casting alloy. 2 Micro-structural analysis: using OM, SEM, TEM, and conductivity, etc., to evaluate microstructure. 3 Properties evaluation: usingthe tensile and hardness test, to evaluate mechanical properties. |
