Novel process for making piston ring
A new process, piston ring technology, applied in piston rings, engine components, machines/engines, etc., can solve the problems of low bonding force between coating and substrate and high price
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[0014] Piston rings are processed by the following process steps:
[0015] Rough casting→grinding end face→heat treatment→machining both end faces→profiling rough turning outer circle→spraying alloyed coating→laser scanning→heat treatment→milling incision→rough boring→rough repairing→grinding outer circle→fine boring → Finishing mouth → Phosphating → Oiling.
[0016] The alloying coating contains (mass percent wt% of each element) 15% to 25% of carbon, 8% to 28% of silicon, 3% to 10% of boron, 2.5% to 7.5% of rare earth, 4% to 9% of molybdenum, 10% to 28% of tungsten, 2% to 10% of titanium, 4% to 9% of cobalt, and 4% to 9% of nickel. The coating thickness of the spray alloyed coating is 0.2 mm to 0.4 mm. Scan the laser beam along the circumference, and the power density of the laser scanning is 10 4 ~10 5 W / cm 2 .
[0017] φ125
[0018] In addition, after entering the stable friction and wear stage, the friction coefficients between various piston rings and cyl...
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