Aluminum alloy material suitable for manufacturing sliding bearing

Abstract

The invention discloses an aluminum alloy suitable for manufacturing a sliding bearing. The aluminum alloy comprises the following components in percentage by mass: 3.0 to 8.0 weight percent of Zn, 3.5 to 7.5 weight percent of Si, 0.4 to 2.5 weight percent of Cu, 0.3 to 2.5 weight percent of Fe, 0.05 to 0.20 weight percent of Zr, 0.01 to 0.05 weight percent of P and the balance of Al, incidental elements and inevitable impurities. The microalloying incidental elements are one or more of Hf, Nb, Ti, V, Sc, Er and Yb, and the total adding amount of the microalloying incidental elements meets the condition that (Zr + Hf + Nb + Ti + V + Sc + Er + Yb) wt% is larger than or equal to 0.06% and smaller than or equal to 0.25%. The content of each inevitable impurity element in the aluminum-silicon alloy is less than or equal to 0.05 wt%, and the total content is less than or equal to0.15 wt%.

Description

technical field [0001] The invention relates to an aluminum alloy combined with soft phase and hard particles, which can be used to make sliding bearings. The soft phase is zinc element, and the hard particles include silicon and other intermetallic compound particles. Background technique [0002] Bearing shells are vital parts of any engine. The bearing bush must meet the load of the engine under different working conditions, provide lubrication for other parts and reduce friction. As a key component, it is prone to failure and damage. The operating state and life of the bearing pad will affect the normal operation of the overall engine. [0003] At present, there are three types of metal-based bearing alloys widely used: Babbitt alloys, copper-based alloys, and aluminum-based alloys. Aluminum-based alloys have good comprehensive properties such as corrosion resistance, wear resistance and friction reduction, seizure resistance, compliance and embedding, and at the same...

AI Technical Summary

Problems solved by technology

In addition to the polluting lead, elements such as Mn, V, Cr, Ni, Ti and B are commonly used alloying elements for aluminum alloys. The addition of these elements will form a large number of hard spots in aluminum alloys and improve the aluminum alloys. The wear resistance of the alloy, but it will also significantly increase the strength of the aluminum alloy and reduce the deformation performance of the aluminum alloy, which is not conducive to the compliance of the sliding bearing

[0010] The aluminum alloys disclosed in US patent documents US5925315 and US20050191204A1 have high strength and good fatigue strength, but low plasticity and toughness, resulting in insufficient compliance of aluminum alloys

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