ASTM_B_611_-_13.pdf

Designation:B61113Standard Test Method forDetermining the High Stress Abrasion Resistance of HardMaterials1This standard is issued under the fixed designation B611;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method was developed for ranking the high-stress abrasion resistance of cemented carbides,but it has beensuccessfully used on ceramics,cermets,and metal matrixhardfacings with a hardness over 55 HRC.The feature of thistest method that discriminates it from other abrasion tests isthat the abrasive is forced against the test specimen with a steelwheel with sufficient force to cause fracture of the abrasiveparticles.Some abrasion tests use rubber wheels to forceabrasive against test surfaces(Test Methods G65,G105,G75).A rubber wheel produces low-stress abrasion while a steelwheel produces high-stress abrasion.1.2 In summary,this is a high-stress laboratory abrasion testfor hard materials using a water slurry of aluminum oxideparticles as the abrasive medium and a rotating steel wheel toforce the abrasive across a flat test specimen in line contactwith the rotating wheel immersed in the slurry.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2B311 Test Method for Density of Powder Metallurgy(PM)Materials Containing Less Than Two Percent PorosityG65 Test Method for Measuring Abrasion Using the DrySand/Rubber Wheel ApparatusG75 Test Method for Determination of Slurry Abrasivity(Miller Number)and Slurry Abrasion Response of Mate-rials(SAR Number)G105 Test Method for Conducting Wet Sand/Rubber WheelAbrasion TestsG40 Terminology Relating to Wear and Erosion3.Terminology3.1 Definitions:For definitions of terms found in this testmethod,please refer to Terminology G40.3.2 Definitions of Terms Specific to This Standard:3.2.1 abrasive wear,nwear due to hard particles or hardprotuberances forced against and moving along a solid surface.3.2.2 high-stress abrasion,nprogressive material removalfrom a hard solid surface by the action of hard particles rollingor sliding on that surface with sufficient force to cause fractureof the particles.3.2.3 slurry,na suspension of solid material in liquid.4.Summary of Test Method4.1 The test specimen is a flat that is held in a verticalposition tangent to a rotating steel wheel immersed in waterslurry of aluminum oxide particles.4.2 The normal force holding the test specimen against thewheel is high enough to cause fracture of abrasive particles thattravel through the wheel/test specimen contact.The test metricis the volume of material worn from the test specimen inspecified test duration and under specified test conditions.4.3 The test specimen is weighed to determine mass losswhich is converted to a volume loss using the density of the testmaterial.4.4 The slurry used in the test is composed of a specifiedmass of 30-mesh aluminum oxide in a specified volume ofwater.4.5 There may be a corrosion component to the materialremoval,but it is considered to be negligible since the test timeis only ten or twenty minutes(600 or 1200 seconds).5.Significance and Use5.1 The extraction of minerals from the Earths mantleusually requires fracturing rock with tools made from metals,1This test method is under the jurisdiction of ASTM Committee G02 on Wearand Erosion and is the direct responsibility of Subcommittee G02.30 on AbrasiveWear.Current edition approved Nov.15,2013.Published XXX 2013.Originallyapproved in 1976.Last previous edition approved in 2005 as B61185(2005).DOI:10.1520/B0611-13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 but clad,overlaid,or covered in some fashion with hardmaterials.Drilling,crushing,and moving rock involves high-stress abrasion on the surfaces that make contact with the rock.The stresses are high enough to crush/fracture the rock.Thistest method simulates this condition,and it is used to screennew materials for these types of applications.It can also beused as a quality control tool for materials destined forhigh-stress abrasion applications:slurry pumps,comminutionequipment,recycling choppers,demolition equipment,etc