A kind of aluminum bronze and preparation method thereof

Abstract

The invention discloses an aluminum bronze, which is characterized in that the mass percentage composition of the aluminum bronze is: 7.0-12.0% Al, 3.0-7.0% Ni, 3.0-7.0wt% Fe, 0-1.0wt% Mn , the Zn of 0~1.0wt%, the Si of 0~0.5wt%, the Sn of 0~0.5wt%, the balance is Cu and unavoidable impurity; The microstructure of described aluminum bronze contains α phase, γ 2 Mutually. The tensile strength of the aluminum bronze of the present invention is ≥740MPa, the yield strength is ≥400MPa, the elongation is ≥15%, and the hardness is ≥200HB; when the number of stretching cycles is 10 7 The second time, the fatigue strength is 355-400MPa; it can meet the comprehensive performance requirements of aluminum bronze for structural parts, wear-resistant parts and corrosion-resistant parts working in machinery industry, shipbuilding and marine industry, petrochemical industry and electrical industry.

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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