Aluminum bronze and preparation method thereof

Abstract

The invention discloses aluminum bronze. The aluminum bronze is characterized by comprising the following components in percentage by mass: 7.0-12.0% of Al, 3.0-7.0% of Ni, 3.0-7.0wt% of Fe, 0-1.0wt%of Mn, 0-1.0wt% of Zn, 0-0.5wt% of Si, 0-0.5wt% of Sn, and the balance Cu and inevitable impurities; and a microstructure of the aluminum bronze contains an alpha phase and a gamma 2 phase. The aluminum bronze has the tensile strength of not less than 740MPa, the yield strength of not less than 400MPa, the ductility of not less than 15% and the hardness of not less than 200HB; when the stretchingcycle times are 107 times, the fatigue strength is 355-400MPa; and the aluminum bronze can satisfy the requirements of structural parts, wear resisting parts, corrosion resisting parts and the like working in such places as mechanical industry, ship and ocean industry, petrochemical industry and electric industry on comprehensive performances of the aluminum bronze.

Description

technical field [0001] The invention belongs to the technical field of copper alloys, and in particular relates to an aluminum bronze and a preparation method thereof. Background technique [0002] Aluminum bronze alloy has high strength, high hardness, good wear resistance and corrosion resistance, and is a copper alloy material with excellent comprehensive performance, so it is widely used in aerospace, rail transit, ocean engineering, construction and mechanical engineering and other military industries and civilian uses Structural parts, wear-resistant parts and corrosion-resistant parts under industrial high-stress conditions are indispensable and important copper alloy materials in modern industry. [0003] In recent years, with the development of science and technology and the progress of industry, higher and newer requirements have been put forward for this type of structural parts, wear-resistant parts and corrosion-resistant parts, such as high strength, high hardn...

AI Technical Summary

Problems solved by technology

The aluminum bronze currently used cannot effectively control the phase composition. During the production process, due to uneven cooling, imbalance, etc., a non-equilibrium structure is formed, in which there are a large number of undecomposed β phases.

The β-phase structure is an unstable structure with high hardness and brittleness, and contains a certain corresponding force. During use, it will decompose into α-phase and γ-phase as the temperature rises. 2 Phase, leading to changes in material properties, resulting in insufficient comprehensive performance of the existing aluminum bronze, it is difficult to obtain comprehensive properties such as tensile strength ≥ 740MPa, yield strength ≥ 400MPa, elongation ≥ 15%, hardness HB ≥ 200, fatigue strength ≥ 355MPa The balance of aluminum bronze cannot meet the requirements of alloy materials with high comprehensive performance requirements.

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