Aluminum alloy having high abrasion resistance, spherical cap made of aluminum alloy, and preparation method of spherical cap

Abstract

The invention discloses an aluminum alloy having high abrasion resistance, a spherical cap made of the aluminum alloy, and a preparation method of the spherical cap. The aluminum alloy comprises the following components of, by mass fraction, 0.10-0.40% of Mn, 2.30-3.30% of Mg, 0.15-0.25% of Cr, 3.50-4.50% of Zn, 0.15% of Cu, less than or equal to 0.30% of Si, less than or equal to 0.40% of Fe, 0.15% of subgroup elements and the balance Al. The abrasion resistance and the corrosion resistance of an aluminum alloy spherical cap body are improved substantially; a series of problems such as high surface roughness are solved; a surface layer of the spherical cap subjected to rolling treatment, mechanical polishing and surface hard anodic oxidation treatment is a mirror surface, the surface hardness is raised to 300-500 HV, the surface roughness is not greater than 0.8 micrometer, the core hardness of a spherical cap component is 172-185 HB, the yield strength is 270-470 Mpa, the strength ofextension is 300-560 Mpa, the elongation percentage is 8-9%, and the wear rate is 3.4*10<-5> to 4.1*10<-5> mm / m under the conditions that the load is 10N and the speed is 10000 r / min; and the usability, the fatigue resistance and the strength of the spherical cap are improved obviously.

Description

Technical field [0001] The invention belongs to the field of aluminum alloy spherical crown preparation, and relates to an aluminum alloy with high wear resistance, a spherical crown prepared therefrom, and a method for preparing the spherical crown. Background technique [0002] The bridge bearing is an important part of the bridge construction. As a key component of the bridge, in order to achieve the same life design of the bridge bearing and the bridge body, the long-term reliability of the spherical crown liner as the core component of the bearing is particularly important. The existing spherical crown liner is mainly made of carbon steel coated stainless steel. The mirror stainless steel with surface roughness Ra≤0.8μm is formed by special abrasive tools and plasma cutting is used to form a concave spherical structure, and then welded to the carbon by compression molding. Convex surface of steel ball crown. This technology is difficult to ensure the close fit between the c...

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Problems solved by technology

The existing production process of aluminum alloy products mainly includes smelting, casting molding, heat treatment and surface treatment, but under this process, there are many defects such as pores in the aluminum alloy after casting, and the product is prone to branching under the action of external force. Crystal cracking, not suitable for forging

For the newly proposed processing steps of homogenizing annealing, hot rolling, quenching, stretching, aging, finish turning and rolling at equal linear speeds, the material utilization rate of this preparation method is extremely low, only about 30%.

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