High-thermal-conductivity regenerated die-casting aluminum alloy material and preparation method thereof

• Main Authors: ZHAO YULIANG, SONG QIUFU, SUN ZHENZHONG, JIA YIWANG, SONG DONGFU, SHEN FANGHUA, CHEN SUJIAN, HUANG SHIPING
• Format: Patent
• Language: Chinese; English
• Published: 29.07.2022
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a high-thermal-conductivity regenerated die-casting aluminum alloy material with a regenerated raw material proportion up to 95%, which comprises the following components in percentage by weight: 9.6-11.5% of Si, 0.75-1.1% of Fe, less than or equal to 0.3% of Mn, less than or equal to 1.0% of Zn, less than or equal to 0.25% of Mg, less than or equal to 0.1% of Ti, less than or equal to 0.1% of Cr, less than or equal to 0.1% of Ni, less than or equal to 0.1% of V, less than or equal to 2.0% of Cu, 0.03-0.05% of Sr, 0.04-0.06% of RE, 0.01-0.02% of B, less than or equal to 0.15% of total impurity elements, less than or equal to 0.05% of single content of the impurity elements and the balance of aluminum. The tensile strength, the yield strength and the elongation of the prepared die casting in the casting state reach 280-350 MPa, 120-150 MPa and 3-6% respectively, and the heat conductivity coefficient can reach 140 W/(m.K) or above. 本发明公开了一种再生原料比例高达95％的高导热再生压铸铝合金材料，按照重量百分比计算，包括以下成分：Si 9.6