Preparation method of aluminum-silicon alloy and aluminum-silicon alloy casting

• Main Authors: YANG ZHIYONG, ZHU YIPENG, YI LYULIN, XIA ZHITAO, LIAO CONGLAI, HUANG DEWEI, WANG XI, FU QINGLIN
• Format: Patent
• Language: Chinese; English
• Published: 30.08.2022
• Subjects: ALLOYS; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention provides an aluminum-silicon alloy. The aluminum-silicon alloy comprises the following components: 7.5-11.5 wt% of Si; 4 to 5 weight percent of Cu; 2.0 to 3.5 wt% of Ni; 0.4 to 0.8 wt% of Mg; 0.6 to 1.44 wt% of Fe; 0.10 wt% to 0.24 wt% of Co; the content of V is 0.3 to 0.72 percent by weight; the content of Hf is 0.05 to 0.1 percent by weight; y is 0.05 to 0.1 wt%; 0.005 to 0.01 wt% of K; the content of Na is 0.005-0.010 wt%, and the balance is Al. The invention further provides a preparation method of the aluminum-silicon alloy casting. Through the selection of the contents of various elements in the aluminum-silicon alloy, especially the limitation of the content relation of Fe, V and Co, the obtained aluminum-silicon alloy with the short needle-shaped iron phase and excellent high-temperature strength and thermal conductivity can be used as a piston material, and the requirement that the technical indexes of existing and future diesel engine pistons are continuously improved is met. 本发明提供了一种铝