A high-damping high-performance alloy cylinder liner and its preparation process

Abstract

The invention discloses a high-damping and high-performance alloy cylinder sleeve and a preparation technology thereof. The high-damping and high-performance alloy cylinder sleeve comprises a cylinder sleeve body and a zinc-aluminum high-damping alloy coating sprayed to the outer wall of a cylinder sleeve body. The thickness of the zinc-aluminum alloy coating is 0.3-1 mm. The cylinder sleeve body comprises, by weight, 3.2-3.5% of C, 2.8-3.3% of Si, 0-0.02% of P, 0-0.01% of S, 3.0-4.0% of Cu, 1.5-2.0% of Mn, 0.4-0.6% of Ni, 0.04-0.08% of Mg, 0.02-0.05% of Ce, and the balance Fe. The nodular cast iron cylinder sleeve obtained through the formula and preparation technology has high damping characteristics, vibration and noise of the engine cylinder sleeve can be effectively reduced, and a wearing surface on the inner wall of the cylinder sleeve has good wear resistance and anti-attrition performance, and the outer wall of the cylinder sleeves has the advantages of being high in strength, good in plasticity, good in corrosion resistance and anti-cavitation ability, short in run-in period with pistons and the like.

Description

technical field [0001] The invention belongs to the field of engine parts production, and in particular relates to a high-damping high-performance alloy cylinder liner and a preparation process thereof. Background technique [0002] The cylinder liner is one of the vulnerable parts of the engine. It forms four components of the cylinder together with the piston, piston ring and piston pin. The quality of the engine directly affects the power, economy and service life of the engine. However, during the actual use of the engine, severe vibration and noise are often generated. Engine vibration causes premature wear, cavitation, and collapse of the wet cylinder liner to a certain extent. In addition, the inner wall of the wet cylinder liner is affected by high temperature and high pressure gas, and the outer wall is cooled by cooling water, which often leads to chemical corrosion of the outer wall, electrochemical corrosion, multiple impact cavitation of high temperature water b...

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Problems solved by technology

[0002] The cylinder liner is one of the vulnerable parts of the engine. It forms four components of the cylinder together with the piston, piston ring and piston pin. The function of the cylinder liner is to convert the pressure generated by the combustion of fuel in the cylinder into mechanical energy through the crank connecting rod mechanism. The quality of the engine directly affects the power, economy and service life of the engine. However, during the actual use of the engine, severe vibration and noise are often generated. Engine vibration causes premature wear, cavitation, and collapse of the wet cylinder liner to a certain extent. In addition, the inner wall of the wet cylinder liner is affected by high-temperature and high-pressure gas, and the outer wall is quenched by cooling water, which often leads to chemical corrosion of the outer wall, electrochemical corrosion, and multiple impact cavitation of high-temperature water bubbles on the surface, and cylinder collapse. How can it be scrapped? Effectively reduce the vibration and noise of the engine cylinder liner, reduce the corrosion and cavitation of the outer wall of the cylinder liner, that is, the high-damping high-performance alloy cylinder liner has always been the research direction of various cylinder liner manufacturers. Therefore, the study of high-damping high-performance alloy cylinder liners has profound meaning

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