ASTM C704 C704M-2014 Standard Test Method for Abrasion Resistance of Refractory Materials at Room Temperature《耐火材料常温耐磨性的标准试验方法》.pdf
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1、Designation: C704/C704M 12C704/C704M 14Standard Test Method forAbrasion Resistance of Refractory Materials at RoomTemperature1This standard is issued under the fixed designation C704/C704M; the number immediately following the designation indicates the yearof original adoption or, in the case of rev
2、ision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the determination of relative abrasion resistance of refractory brick at ro
3、om temperature. This testmethod can also be applied to castable refractories (see Metric Dimensions, Practice C861 and Practice C865) and plasticrefractories (see Practice C1054).1.2 UnitsWhen values are stated in both SI and inch-pound units, the units are to be regarded separately as standard. The
4、values stated in each system may not be exact equivalents; therefore, use each system independently of the other. Combining valuesfrom the two systems may result in non-conformance with the standard. Several values are stated only in SI units as a matter ofconvention and to permit comparison of resu
5、lts. Included are the abrading media weight (grams), specimen weight (grams),specimen weight loss due to abrasion (grams), and the resultant volume loss (cubic centimeters).1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibi
6、lityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2A681 Specification for Tool Steels AlloyC134 Test Methods for Size, Dimensional Measurements, and Bul
7、k Density of Refractory Brick and Insulating FirebrickC179 Test Method for Drying and Firing Linear Change of Refractory Plastic and Ramming Mix SpecimensC861 Practice for Determining Metric Dimensions of Standard Series Refractory Brick and ShapesC862 Practice for Preparing Refractory Concrete Spec
8、imens by CastingC865 Practice for Firing Refractory Concrete SpecimensC1036 Specification for Flat GlassC1054 Practice for Pressing and Drying Refractory Plastic and Ramming Mix SpecimensD4285 Test Method for Indicating Oil or Water in Compressed Air2.2 American Society of Mechanical Engineers (ASME
9、) Standard:B40.100 Pressure Gauges and Gauge Attachments2.3 ASTM Adjuncts:Abrasion Tester (1 dwg)33. Summary of Test Method3.1 This test method measures the volume of material in cubic centimeters abraded from a flat surface at a right angle to a nozzlethrough which 1000 g of size-graded silicon car
10、bide grain is blasted by air at a prescribed air pressure.4. Significance and Use4.1 This test method measures the relative abrasion resistance of various refractory samples under standard conditions at roomtemperature.1 This test method is under the jurisdiction of ASTM Committee C08 on Refractorie
11、s and is the direct responsibility of Subcommittee C08.03 on Physical Properties.Current edition approved March 1, 2012March 1, 2014. Published April 2012May 2014. Originally approved in 1972. Last previous edition approved in 20092012 asC704 09C704 12. . DOI: 10.1520/C0704_C0704M-12.10.1520/C0704_C
12、0704M-14.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Detailed prints for the construction of the test c
13、hamber are available at a nominal cost from ASTM International Headquarters. Order Adjunct No. ADJC0704. Anacceptable test chamber can be made from a weatherproof electrical switch box.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of
14、 what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered
15、 the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.2 The abrasion resistance of a refractory material provides an indication of its suitability for service in abrasive environments.4.3 The results obtained by thi
16、s test method could be different than those obtained in service because of the different conditionsencountered.5. Interferences (Factors known to Affect Results)5.1 During development, a ruggedness test was performed using 114 by 114 by 12.7 mm 412 by 412 by 12 in. float glass platesconforming to Sp
17、ecification C1036. Several factors were found to cause statistically significant effects on measured results (seeSection 10).5.1.1 Nozzle Tube Inside DiameterVariation in the inside diameter of the flint glass nozzle tube statistically affected theabrasion values obtained on the glass plate. Ideal g
18、lass tube inside diameter is 4.8 mm. Glass tube lots purchased as 7 mm outsidediameter tube with a nominal 1.1 mm wall thickness can have inside diameters ranging from 4.6 mm to 5.0 mm. For the ruggednesstest, flint glass tube inside diameters of 4.7 mm and 4.9 mm were used. Take the statistically s
19、ignificant effect of this small tubeinside diameter variation into consideration. Individually measure and choose all nozzle tubes to conform to a specified 4.8 mminside diameter.5.1.2 Air PressureVariation in the test air pressure statistically affected the abrasion values obtained on the glass pla
20、te. Airpressure as specified in this test method is 448 kPa 65 psi measured by a gauge capable to 6 6.9kPa 6 1 psi. For the ruggednesstest, air pressure was maintained at values of 441 kPa 64 psi and 455 kPa 66 psi by the use of a calibrated master series pressuregauge. Take the statistically signif
21、icant effect of this small air pressure variation into consideration and use only gauges as specifiedin 6.1.5. It is also recommended that air gauges be recalibrated at frequent intervals.5.2 Factors that were found to be rugged during the test method evaluation were: (1) particle size variation of
22、the silicon carbidegrain between sizings of grain composed of 25% 20 mesh by 30 mesh and 75% 30 mesh by 50 mesh silicon carbide to onecomposed of 15% 20 mesh by 30 mesh and 85% 30 mesh by 50 mesh silicon carbide sizing, (2) nozzle to sample distance varyingbetween 200 mm 7 78 in. to 206 mm 818 i.n,
23、(3) silicon carbide grit amount between 995 g and 1005 g, and (4) test operator.6. Apparatus6.1 Abrasion Tester, used for measuring the abrasion resistance of refractory specimens, consisting of the following (Fig. 1 andFig. 2):6.1.1 Blast Gun (Leitch Carco Gun Model LC-CG)4, modified for this equip
24、ment as shown in Fig. 3. Other sand blast gunmodels or types may affect test results.6.1.2 NozzleMake the nozzle from a piece of flint-glass tubing, 115 mm 4 12 in. long, 7 mm 0.276 in. 6 0.12 mm 0.005in. outside diameter, with a 1.1 mm 0.043 in. 6 0.03 mm 0.001 in. wall thickness. When the Carco Bl
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