استاندارد ASTM G181 در خصوص Conducting Friction Tests of Piston Ring and Cylinder Liner Materials Under Lubricated Conditions

  استاندارد ASTM G181 در خصوص Standard Test Method for Conducting Friction Tests of Piston Ring and Cylinder Liner Materials Under Lubricated Conditions نسخه 2011 10 صفحه   Scope 1.1 This test method covers procedures for conductinglaboratory bench-scale friction tests of materials, coatings, andsurface treatments intended for use in piston rings and cylinderliners in diesel or spark-ignition engines. The goal of thisprocedure is to provide a means for preliminary, cost-effectivescreening or evaluation of candidate ring and liner materials. Areciprocating sliding arrangement is used to simulate thecontact that occurs between a piston ring and its mating linernear the top-dead-center position in the cylinder where liquidlubrication is least effective, and most wear is known ...