Aluminum-silicon-titanium alloy air cylinder sleeve and processing technology thereof

Abstract

The invention discloses an aluminum-silicon-titanium alloy air cylinder sleeve and a processing technology thereof. The aluminum-silicon-titanium alloy air cylinder sleeve comprises the following components: 3-8% of Si, 3-8% of Ti, 0.01-0.03% of C, 2-4% of Ni, 0.5-1.5% of Cr, 0.1-0.3% of Sr, 0.6-1% of Mn, 0.4-0.9% of Ca, 0.01-0.03% of S and the balance aluminum. The fatigue life of the manufactured air cylinder sleeve is prolonged by 2.5 times, the microhardness is increased by 25%, the wear resistance is improved by 60%, the corrosion resistance is improved by 50%, the mechanical property ofthe air cylinder sleeve is improved, the incident problems including cavitation erosion, corrosion and fatigue cracking are improved, the service life of the air cylinder sleeve is prolonged, investment of technological equipment is reduced, the manufacturing cost is reduced, the processing period is shortened, energy conservation and environmental protection are realized, machining without cutting output is carried out on the surface of metal, the precision of the air cylinder sleeve is greatly improved, and the Ra value is equal to or less than 0.1.

Description

technical field [0001] The invention belongs to the technical field of engines, and in particular relates to an aluminum-silicon-titanium alloy cylinder liner and a processing technology thereof. Background technique [0002] The cylinder liner, the cylinder head and the piston together constitute the working space of the cylinder, which is the lead of the reciprocating motion of the piston. It is cooled by cooling water outside and bears mechanical damage and corrosion damage. [0003] Existing cylinder liners are generally produced and processed using wear-resistant alloy cast iron containing phosphorus or boron or seamless cold-drawn steel pipes as materials. The processing technology is complicated and there are many shortcomings: [0004] (1) There are many processes and a variety of mechanical equipment are required, such as lathes, boring machines, internal grinding, external grinding and honing machines, so the production cycle is long and the manufacturing cost is h...

AI Technical Summary

Problems solved by technology

[0004] (1) There are many processes and a variety of mechanical equipment are required, such as lathes, boring machines, internal grinding, external grinding and honing machines, so the production cycle is long and the manufacturing cost is high;

[0005] (2) The corrosion resistance of materials such as cast iron or structural steel is poor, and the surface layer of the cooling medium is easily corroded, fatigued and cracked, so the service life is short;