Thermally conductive aluminum alloy and application thereof

Abstract

The present disclosure discloses a heat-conductive aluminum alloy and application thereof. The heat-conductive aluminum alloy contains alloying elements, unavoidable impurities and the balance of an aluminum element. Based on the total weight of the heat-conductive aluminum alloy, the alloying elements include: 5.0 to 11.0% by weight of Si, 0.4 to 1.0% by weight of Fe, 0.2 to 1.0% by weight of Mg, less than 0.1% by weight of Zn, less than 0.1% by weight of Mn, less than 0.1% by weight of Sr and less than 0.1% by weight of Cu. The heat-conductive aluminum alloy prepared by the present disclosure has a tensile strength of not less than 250 MPa, a yield strength of not less than 150 MPa, an elongation of not less than 3.5%, and a thermal conductivity of not less than 150 W/(m·K).

1 . A heat-conductive aluminum alloy, comprising:
 alloying elements;   unavoidable impurities; and   balance of an aluminum element,   wherein, based on total weight of the heat-conductive aluminum alloy, the alloying elements comprise: 5.0 to 11.0% by weight of Si, 0.4 to 1.0% by weight of Fe, 0.2 to 1.0% by weight of Mg, less than 0.1% by weight of Zn, less than 0.1% by weight of Mn, less than 0.1% by weight of Sr, and less than 0.1% by weight of Cu.   
     
     
         2 . The heat-conductive aluminum alloy according to  claim 1 , wherein, based on total weight of the heat-conductive aluminum alloy, the alloying elements comprise: 8.0 to 11.0% by weight of Si, 0.4 to 0.6% by weight of Fe, 0.4 to 0.8% by weight of Mg, less than 0.01% by weight of Zn, less than 0.01% by weight of Mn, less than 0.1% by weight of Sr, and less than 0.01% by weight of Cu. 
     
     
         3 . The heat-conductive aluminum alloy according to  claim 1 , wherein the impurity elements in the heat-conductive aluminum alloy do not exceed 0.2% by weight. 
     
     
         4 . The heat-conductive aluminum alloy according to  claim 1 , wherein the heat-conductive aluminum alloy consists of 5.0 to 11.0% by weight of Si , 0.4 to 1.0% by weight of Fe, 0.2 to 1.0% by weight of Mg, less than 0.1% by weight of Zn, less than 0.1% by weight of Mn, less than 0.1% by weight of Sr, less than 0.1% by weight of Cu, not more than 0.2% by weight of impurity elements and the balance of aluminum. 
     
     
         5 . The heat-conductive aluminum alloy according to  claim 2 , wherein the heat-conductive aluminum alloy consists of 8.0 to 11.0% by weight of Si, 0.4 to 0.6% by weight of Fe, 0.4 to 0.8% by weight of Mg, less than 0.01% by weight of Zn, less than 0.01% by weight of Mn, less than 0.1% by weight of Sr, less than 0.01% by weight of Cu, not more than 0.2% by weight of impurity elements and the balance of aluminum. 
     
     
         6 . The heat-conductive aluminum alloy according to  claim 1 , wherein the heat-conductive aluminum alloy has a tensile strength of not less than 250 MPa, a yield strength of not less than 150 MPa, an elongation of not less than 3.5%, and a thermal conductivity of not less than 150 W/(m·K). 
     
     
         7 . The heat-conductive aluminum alloy according to  claim 2 , wherein the heat-conductive aluminum alloy has a tensile strength of not less than 270 MPa, a yield strength of not less than 160 MPa, an elongation of not less than 5%, and a thermal conductivity of not less than 160 W/(m·K). 
     
     
         8 . (canceled)