Near-eutectic type high-strength heat-resistant Al-Ce-series aluminum alloy and preparation method

Abstract

The invention provides a near-eutectic type high-strength heat-resistant Al-Ce-series aluminum alloy and a preparation method. The near-eutectic type high-strength heat-resistant Al-Ce-series aluminumalloy is prepared from the following elements in percentage by weight: 5.00 percent to 15.00 percent of Ce, 0.01 percent to 5.00 percent of Fe, 0.10 percent to 1.20 percent of Mg, 0.05 percent to 1.00 percent of Si, 0.001 percent to 5.00 percent of Cu, 0.001 percent to 0.40 percent of Co, 0.001 percent to 0.85 percent of B, 0.001 percent to 0.20 percent of Ti, 0.001 percent to 0.15 percent of V,0.001 percent to 0.12 percent of Cr, 0.001 percent to 0.12 percent of Mn, 0.001 percent to 0.15 percent of Ni, and the balance aluminum. The near-eutectic type high-strength heat-resistant Al-Ce-series aluminum alloy provided by the invention has high strength and high heat resistance, the tensile strength at the room temperature reaches to more than 440MPa, and the tensile strength at 300 DEG C reaches to more than 250MPa; and the cost of raw materials for preparing the aluminum alloy is low, and a preparation process is simple.

Description

technical field [0001] The invention belongs to the technical field of alloys, and in particular relates to a near-eutectic high-strength and heat-resistant Al-Ce aluminum alloy and a preparation method thereof. Background technique [0002] Heat-resistant aluminum alloy has sufficient oxidation resistance at high temperatures, and has the ability to resist plastic deformation and damage under the long-term action of temperature and load. It also has the advantages of good thermal conductivity and light specific gravity. It is used in weapons, ships, and aviation. , aerospace, automotive and other industries are widely used, such as pistons, cylinder liners, connecting rods, boxes, cylinder heads, missile shells, empennages, aeroengine cylinders, blades, aircraft skins, etc. of vehicle engines. With the rapid development of aviation, aerospace and automobile industries, higher requirements are placed on the performance of heat-resistant aluminum alloys. [0003] During the ...

AI Technical Summary

Problems solved by technology

The room temperature tensile strength of the patented aluminum alloy is only 165MPa, and the tensile strength at 300°C does not exceed 100MPa. The room temperature and high temperature strength is low, and the raw material Sc is expensive and the cost is high.