ASTM D2782-2002(2014) Standard Test Method for Measurement of Extreme-Pressure Properties of Lubricating Fluids &40 Timken Method&41 《测定润滑液极压性能的标准试验方法(梯姆肯试验机法)》.pdf
《ASTM D2782-2002(2014) Standard Test Method for Measurement of Extreme-Pressure Properties of Lubricating Fluids &40 Timken Method&41 《测定润滑液极压性能的标准试验方法(梯姆肯试验机法)》.pdf》由会员分享,可在线阅读,更多相关《ASTM D2782-2002(2014) Standard Test Method for Measurement of Extreme-Pressure Properties of Lubricating Fluids &40 Timken Method&41 《测定润滑液极压性能的标准试验方法(梯姆肯试验机法)》.pdf(12页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D2782 02 (Reapproved 2014)240/84Standard Test Method forMeasurement of Extreme-Pressure Properties of LubricatingFluids (Timken Method)1This standard is issued under the fixed designation D2782; the number immediately following the designation indicates the year oforiginal adoption or,
2、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 covers the determination of the load-carrying capacity of lubric
3、ating fluids by means of the TimkenExtreme Pressure Tester.NOTE 1This test method is suitable for testing fluids having aviscosity of less than about 5000 cSt (5000 mm2/s) at 40C. For testingfluids having a higher viscosity, refer to Note 5 in 9.1.1.2 The values stated in SI units are to be regarded
4、 asstandard. Because the equipment used in this test method isavailable only in inch-pound units, SI units are omitted whenreferring to the equipment and the test specimens.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibili
5、ty 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. Specific warningstatements are given in 7.1, 7.2, 8.1, 8.2, 9.4, and 9.9.2. Referenced Documents2.1 ASTM Standards:2D2509 Test Method for Mea
6、surement of Load-CarryingCapacity of Lubricating Grease (Timken Method)D4175 Terminology Relating to Petroleum, PetroleumProducts, and LubricantsG40 Terminology Relating to Wear and Erosion2.2 ASTM Adjuncts:Photograph of Test Blocks Showing Scars33. Terminology3.1 Definitions:3.1.1 extreme pressure
7、(EP) additive, n, in a lubricantasubstance that minimizes damage to metal surfaces in contactunder high-stress rubbing conditions. D41753.1.2 lubricant, nany substance interposed between twosurfaces for the purpose of reducing friction or wear betweenthem. G403.1.3 scoring, n, in tribologya severe f
8、orm of wear char-acterized by the formation of extensive grooves and scratchesin the direction of sliding. G403.1.4 wear, ndamage to a solid surface generally involv-ing progressive loss of material, due to relative motion betweenthat surface and a contacting substance or substances. G403.2 Definiti
9、ons of Terms Specific to This Standard:3.2.1 load-carrying capacity of a lubricant as determinedby this test method, the maximum load or pressure that can besustained by the lubricant (when used in the given systemunder specific conditions) without failure of the sliding contactsurfaces as evidenced
10、 by scoring or seizure or asperity weld-ing.3.2.2 OK value, nas determined by this test method, themaximum mass (weight) added to the load lever weight pan, atwhich no scoring or seizure occurs.3.2.3 score value, nas determined by this test method, theminimum mass (weight) added to the load lever we
11、ight pan, atwhich scoring or seizure occurs.3.2.3.1 DiscussionWhen the lubricant film is substantiallymaintained, a smooth scar is obtained on the test block, butwhen there is a breakdown of the lubricant film, scoring orsurface failure of the test block takes place, as shown in Figs.1 and 2. In its
12、 simplest and most recognized form, scoring ischaracterized by the furrowed appearance of a wide scar on the1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility ofSubcommittee D02.L0.11 on Tribiological
13、Properties of Industrial Fluids andLubricates.Current edition approved May 1, 2014. Published July 2014. Originally approvedin 1969. Last previous edition approved in 2008 as D2782 02 (2008).This test method was adopted as a joint ASTM-IP Standard.This test method was prepared under the joint sponso
14、rship of the AmericanSociety of Lubrication Engineers. Accepted by STLE January 1969. DOI: 10.1520/D2782-02R14.2For 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 s
15、tandards Document Summary page onthe ASTM website.3Available from ASTM International Headquarters. Order Adjunct No.ADJD2509. Original adjunct produced in 1972.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1test block and by excessiv
16、e pick-up of metal on the surface ofthe test cup. The form of surface failure more usuallyencountered, however, consists of a comparatively smoothscar, which shows local damage that usually extends beyondthe width of the scar. Scratches or striations that occur in anotherwise smooth scar and that do
17、 not extend beyond the widthof the scar are not considered as evidence of scoring.3.2.4 seizure or asperity weldinglocalized fusion of metalbetween the rubbing surfaces of the test pieces. Seizure isusually indicated by streaks appearing on the surface of the testcup, an increase in friction and wea
18、r, or unusual noise andvibration. Throughout this test method the term seizure isunderstood to mean seizure or asperity welding.4. Summary of Test Method4.1 The tester is operated with a steel test cup rotatingagainst a steel test block. The rotating speed is 123.71 6 0.77mmin (405.88 6 2.54 ft/min)
19、 which is equivalent to a spindlespeed of 800 6 5 rpm. Fluid samples are preheated to37.8 6 2.8C (100 6 5F) before starting the test.4.2 Two determinations are made: the minimum load (scorevalue) that will rupture the lubricant film being tested betweenthe rotating cup and the stationary block and c
20、ause scoring orseizure; and the maximum load (OK value) at which therotating cup will not rupture the lubricant film and causescoring or seizure between the rotating cup and the stationaryblock.5. Significance and Use5.1 This test method is used widely for the determination ofextreme pressure proper
21、ties for specification purposes. Usersare cautioned to carefully consider the precision and biasstatements herein when establishing specification limits.6. Apparatus6.1 Timken Extreme Pressure Tester,4described in detail inAnnex A1 and illustrated in Fig. 3.6.2 Sample Feed Device,4for supplying the
22、test specimenswith fluid is described in Annex A1.6.3 Loading Mechanism,4for applying and removing theload weights without shock at the uniform rate of0.91 to 1.36 kgs (2 to 3 lb/s).Adetailed description is given inAnnex A1.6.4 Microscope,4low-power (50 to 60) having sufficientclearance under object
23、ive to accommodate the test block. Itshould be fitted with a filar micrometer so that the scar widthmay be measured with an accuracy of 60.05 mm (60.002 in.).6.5 Timer, graduated in minutes and seconds.7. Reagents and Materials7.1 Acetone, reagent grade. (WarningExtremely flam-mable. Harmful when in
24、haled. See A3.1.)7.2 Stoddard Solvent or White Spirit, reagent grade.(WarningFlammable. See A3.2.)7.3 Test Cup,4,5of carburized steel, having a RockwellHardness “C” Scale Number of 58 to 62, or a Vickers HardnessNumber of 653 to 756. The cups have a width of0.514 6 0.002 in., a perimeter of 6.083 6
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
本资源只提供5页预览,全部文档请下载后查看!喜欢就下载吧,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMD278220022014STANDARDTESTMETHODFORMEASUREMENTOFEXTREMEPRESSUREPROPERTIESOFLUBRICATINGFLUIDS40TIMKENMETHOD41

链接地址:http://www.mydoc123.com/p-513488.html