1、Designation:G9905(Reapproved 2010)Standard Test Method forWear Testing with a Pin-on-Disk Apparatus1This standard is issued under the fixed designation G99;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anu
2、mber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers a laboratory procedure fordetermining the wear of materials during sliding using apin-on-disk apparatus.Materials are
3、tested in pairs undernominally non-abrasive conditions.The principal areas ofexperimental attention in using this type of apparatus tomeasure wear are described.The coefficient of friction mayalso be determined.1.2 The values stated in SI units are to be regarded asstandard.No other units of measure
4、ment are included in thisstandard.1.3 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 limitatio
5、ns prior to use.2.Referenced Documents2.1 ASTM Standards:2E178 Practice for Dealing With Outlying ObservationsG40 Terminology Relating to Wear and ErosionG117 Guide for Calculating and Reporting Measures ofPrecision Using Data from Interlaboratory Wear or Ero-sion Tests2.2 DIN Standard:3DIN 50324 Te
6、sting of Friction and Wear3.Summary of Test Method3.1 For the pin-on-disk wear test,two specimens are re-quired.One,a pin with a radiused tip,is positioned perpen-dicular to the other,usually a flat circular disk.A ball,rigidlyheld,is often used as the pin specimen.The test machinecauses either the
7、disk specimen or the pin specimen to revolveabout the disk center.In either case,the sliding path is a circleon the disk surface.The plane of the disk may be orientedeither horizontally or vertically.NOTE1Wear results may differ for different orientations.3.1.1 The pin specimen is pressed against th
8、e disk at aspecified load usually by means of an arm or lever and attachedweights.Other loading methods have been used,such ashydraulic or pneumatic.NOTE2Wear results may differ for different loading methods.3.2 Wear results are reported as volume loss in cubicmillimetres for the pin and the disk se
9、parately.When twodifferent materials are tested,it is recommended that eachmaterial be tested in both the pin and disk positions.3.3 The amount of wear is determined by measuring appro-priate linear dimensions of both specimens before and after thetest,or by weighing both specimens before and after
10、the test.Iflinear measures of wear are used,the length change or shapechange of the pin,and the depth or shape change of the diskwear track(in millimetres)are determined by any suitablemetrological technique,such as electronic distance gaging orstylus profiling.Linear measures of wear are converted
11、to wearvolume(in cubic millimetres)by using appropriate geometricrelations.Linear measures of wear are used frequently inpractice since mass loss is often too small to measure precisely.If loss of mass is measured,the mass loss value is converted tovolume loss(in cubic millimetres)using an appropria
12、te valuefor the specimen density.3.4 Wear results are usually obtained by conducting a testfor a selected sliding distance and for selected values of loadand speed.One set of test conditions that was used in aninterlaboratory measurement series is given in Table 1 andTable 2 as a guide.Other test co
13、nditions may be selecteddepending on the purpose of the test.3.5 Wear results may in some cases be reported as plots ofwear volume versus sliding distance using different specimensfor different distances.Such plots may display non-linearrelationships between wear volume and distance over certainport
14、ions of the total sliding distance,and linear relationshipsover other portions.Causes for such differing relationships1This test method is under the jurisdiction of ASTM Committee G02 on Wearand Erosion and is the direct responsibility of Subcommittee G02.40 on Non-Abrasive Wear.Current edition appr
15、oved April 1,2010.Published April 2010.Originallyapproved in 1990.Last previous edition approved in 2005 as G9905.DOI:10.1520/G0099-05R10.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume info
16、rmation,refer to the standards Document Summary page onthe ASTM website.3Available from Beuth Verlag GmbH(DIN-DIN Deutsches Institut furNormung e.V.),Burggrafenstrasse 6,10787,Berlin,Germany,http:/www.en.din.de.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 include initial“break-in”processes,transitions between re-gions of different dominant wear mechanisms,and so forth.The extent of such non-linear periods depends on the details oft
