TY - JOUR N2 - In order to identify the influence of different Mn, Cd, V and Zr content on the properties of Al-Cu casting alloys in hydraulic valves, orthogonal test methods were used to prepare alloy test bars with different elements and contents. Tensile tests were performed on the test bars so obtained. The microstructure of alloys with different compositions is studied. The results show that adding approximately 0.4% of Mn can not only form a strengthening phase but also reduce the excessive segregation of the matrix along the grain boundary. A Cd content of 0.2% can promote the formation of micro Cd spheres in the softer aluminum matrix. Hard spots increase the wear resistance of the material; however, an excess of Cd will cause element segregation and deteriorate the mechanical properties of the valve body. Zr and V refine the grains in the alloy; however, an excess of these elements will lead to a large area of segregation. If proper heat treatment is lacking, the mechanical properties of the valve body deteriorate. L1 - http://www.czasopisma.pan.pl/Content/114683/PDF/AFE%201_2020_15.pdf L2 - http://www.czasopisma.pan.pl/Content/114683 PY - 2020 IS - No 1 EP - 94 DO - 10.24425/afe.2020.131288 KW - Al-Cu cast alloy KW - Element optimization KW - Strengthening mechanism KW - Hydraulic multi-way valve A1 - Li, Rong A1 - Chen, Lunjun A1 - Zeng, Qi. A1 - Su, Ming A1 - Xie, Zhiping PB - The Katowice Branch of the Polish Academy of Sciences VL - vol. 20 DA - 2020.01.03 T1 - Optimization of Al-Cu Cast Alloy Composition for Hydraulic Valves SP - 84 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/114683 T2 - Archives of Foundry Engineering ER -