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Cylinder liner with its inner peripheral surface formed with surface treatment layer, and method for machining to the surface treatment layer
Cylinder liner with its inner peripheral surface formed with surface treatment layer, and method for machining to the surface treatment layer
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机译:具有形成有表面处理层的内周表面的气缸套及其加工方法
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摘要
A cylinder liner for use in an internal combustion engine has an inner peripheral surface at which a surface treatment layer is formed upon water vapor treatment. The surface treatment layer has a surface configuration capable of providing excellent lubrication oil retaining function and initial break-in property as well as capable of being machined easily. The treatment surface of the cylinder liner has a plateau configuration providing a surface roughness Rz of 0.8 to 5.9 μm, and the plateau configuration is defined under DIN4776 by a reduced peak height Rpk of not more than 0.64 μm, a core roughness depth Rk of 0.05 to 1.8 μm, and a reduced valley depth Rvk of 0.15 to 3.3 μm. For grinding to the surface, a honing machine employs a grindstone containing metal bonded diamond grains at high density. Diamond grain size is not less than 4000.
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