1、Designation:D 3520 04An American National StandardStandard Test Method forQuenching Time of Heat-Treating Fluids(MagneticQuenchometer Method)1This standard is issued under the fixed designation D 3520;the number immediately following the designation indicates the year oforiginal adoption or,in the c
2、ase of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers a procedure for making acomparative evaluation of the quenching speed
3、characteristicsof petroleum fluids used in the quenching of metals by meansof the Magnetic Quenchometer.NOTE1A comparison method for testing the hardenability of steel isTest Method A 255.NOTE2An additional comparison method for evaluation of thequenching speed characteristics of petroleum fluids us
4、ed in the quenchingof metals is Test Method D 6200.1.2 This test method provides a measure of changes in oilchemistry due to contamination,base oil degradation,andadditive drag-out during use.This test measures changes in thequenching speed characteristics of petroleum fluids at the hightemperature(
5、354C).This test method does not reliablypredict metallurgical performance.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 th
6、e applica-bility of regulatory requirements prior to use.2.Referenced Documents2.1 ASTM Standards:2A 255 Test Method for End-Quench Test for Hardenabilityof SteelD 91 Test Method for Precipitation Number of LubricatingOilsD 92 Test Method for Flash and Fire Points by ClevelandOpen Cup TesterD 97 Tes
7、t Method for Pour Point of Petroleum ProductsD 287 Test Method forAPI Gravity of Crude Petroleum andPetroleum Products(Hydrometer Method)D 445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids(the Calculation of Dynamic Viscos-ity)D 484 Specification for Hydrocarbon Drycleaning So
8、l-vents3D 1218 Test Method for Refractive Index and RefractiveDispersion of Hydrocarbon LiquidsD 1744 Test Method for Water in Liquid Petroleum Prod-ucts by Karl Fischer Reagent3D 6200 Test Method for Determining Cooling Characteris-tics of Quench Oils by Cooling Curve Analysis3.Summary of Test Meth
9、od3.1 This test method determines the time for cooling achromized nickel ball from approximately 885C(1625F)toapproximately 354C(670F)when quenched in 200 mL oftest fluid in a metal beaker at 21 to 27C(70 to 81F).Thequenching time is recorded by a digital timer which isenergized by a photoelectric c
10、ell from light produced by theball at 885C(1625F)and which is stopped when the ballbecomes magnetic(Curie Point,approximately 354C)and isattracted by a magnet to the side of the beaker,tripping a relayto stop the timer.4.Significance and Use4.1 The results obtained by the test method described areus
11、eful as guides in selecting fluids with respect to quenchingspeed characteristics desired for metal quenching applications.NOTE3Although this test method has been found useful for somewater-based fluids,the statistical significance of the test has beenestablished only by round-robin testing of petro
12、leum-based fluids.4.2 These results will provide a measure of quenching speed(cooling rate)from approximately 885C(1625F)to 354C(670F)and are not directly proportional to hardness obtain-able on metals quenched therein as many other factors areinvolved in the quenching process in actual plant operat
13、ionwith production parts.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.L0 on Industrial Lubricants.Current edition approved May 1,2004.Published June 2004.Originallyapproved in 1976.Withdrawn
14、November 2003 and reinstated as D 352004.2For 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.3Withdrawn.1Copyright AST
15、M International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.NOTE4Test Method D 6200 describes the equipment and procedurefor characterizing the time-temperature performance of a quenching oilthrough the entire cooling process.5.Apparatus5.1 Magnetic Quenchometer,4
16、as shown in Figs.1 and 2.5.2 Furnace,Electric Muffle,with air atmosphere,capableof maintaining a temperature of 885 6 5C(1625 6 9F),asmeasured at the ball by the thermocouple prior to quenching,and fitted with(1)a clean ceramic base plate,for supportingthe test ball,and(2)a No.14 B&S gage Chromel-Alumelthermocouple probe(without a protection tube)insertedthrough a hole in a wall of the furnace,and positioned tocontact the test ball.NOTE5A rheostat on the power supply may be used to provide aclos
