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US5433001A Method of producing piston ring 失效
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Method of producing piston ring
摘要:
A method of producing a piston ring to be incorporated in an internal combustion engine includes first nitriding surfaces of a steel base material in a high temperature range and then continuously nitriding in a low temperature range. Finally a porous layer of at least a sliding surface is removed to expose a diffusion layer under the porous layer.
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