Co-Mo-RE high-strength heat resistant aluminum alloy material and preparation method thereof

Abstract

The invention discloses a high-strength heat resistant aluminum alloy material and a preparation method thereof. The material comprises the following components in percentage by weight: 1.0-10.0 percent of Cu, 0.05-1.5 percent of Mn, 0.01-0.5 percent of Cd, 0.01-0.5 percent of Ti, 0.01-0.2 percent of B, 0.01-1.0 percent of Zr, 0.01-1.0 percent of Co, 0.01-1.0 percent of Mo, 0.05-5 percent of RE and the balance of aluminum. In the invention, under the guidance of high-quality melts, solid solutions and a phase diagram theory, through optimizing the formulas of main alloy elements of Cu, Mn andRE, the alloy quasi solid-phase temperature range is reduced and the problems of large heat tearing tendency, low product high-temperature strength, and the like are solved; and a low-cost multielement microalloy element formula is optimized, which creates a material base condition for the culture and the grain refining of a high-temperature phase and a strengthening phase in solid solutions so as to finally develop the high-strength heat resistant aluminum alloy material.

Description

Technical field [0001] The invention relates to an aluminum alloy material and a preparation method thereof, in particular to an aluminum alloy material of microalloying elements and rare earth elements and a preparation method thereof. Background technique [0002] Aluminum alloy is a relatively young metal material, which only started industrial application in the early 20th century. During the Second World War, aluminum was mainly used to manufacture military aircraft. After the war, due to the sudden drop in the military industry’s demand for aluminum, the aluminum industry began to develop civilian aluminum alloys, and its application range was expanded from the aviation industry to the construction industry, container and packaging industry, transportation, power and electronics industry, Various sectors of the national economy, such as machinery manufacturing and petrochemical industries, are applied to people's daily lives. At present, aluminum is used in a large amount...

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Problems solved by technology

[0025] The technical problem to be solved by the present invention is to solve the existing problems in the field of high-strength aluminum alloys, such as extensive melt treatment process, poor quality, large thermal cracking tendency, poor casting performance, low product yield, low high-temperature strength, waste materials and slag recycling. For technical problems such as poor usability, under the guidance of high-quality melt, solid solution and phase diagram theory, by optimizing the formula of main alloy elements Cu, Mn and rare earth elements, the temperature range of the quasi-solid phase of the alloy is reduced, and the hot cracking tendency during casting and the high temperature of the product are solved. The general problem of low strength (including instantaneous strength and durable strength); optimize the low-cost multi-element microalloying element formula to create material basic conditions for the cultivation and fine-graining of high-temperature phases and strengthening phases in solid solutions; and optimize Melting and heat treatment technology to realize sufficient cultivation of high-temperature phase and strengthening phase in solid solution and full play of fine-graining effect

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