ASTM E1077-2001(2005) 钢试样的脱碳深度估计的标准试验方法
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【英文标准名称】:StandardTestMethodsforEstimatingtheDepthofDecarburizationofSteelSpecimens
【原文标准名称】:钢试样的脱碳深度估计的标准试验方法
【标准号】:ASTME1077-2001(2005)
【标准状态】:现行
【国别】:
【发布日期】:2001
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E04.14
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:carboncontent;completedecarburization;decarburization;ferrite;microindentationhardness;partialdecarburization;steels;totaldecarburization
【摘要】:Thesetestmethodsareusedtodetectsurfacelossesincarboncontentduetoheatingatelevatedtemperatures,asinhotworkingorheattreatment.Resultsofsuchtestsmaybeusedtoqualifymaterialforshipmentaccordingtoagreeduponguidelinesbetweenpurchaserandmanufacturer,forguidanceastomachiningallowances,ortoassesstheinfluenceofprocessingupondecarburizationtendency.Screeningtestsaresimple,fast,low-costtestsdesignedtoseparatenon-decarburizedsamplesfromthosewithappreciabledecarburization.Basedontheresultsofsuchtests,theotherproceduresmaybeutilizedasapplicable.Microscopicaltestsrequireametallographicallypol-ishedcrosssectiontopermitreasonablyaccuratedetermina-tionofthedepthandnatureofthedecarburizationpresent.Severalmethodsmaybeemployedforestimationofthedepthofdecarburization.Thestatisticalaccuracyofeachvarieswiththeamountofeffortexpended.Microindentationhardnessmethodsareemployedonpolishedcrosssectionsandaremostsuitableforhardenedspecimenswithreasonablyuniformmicrostructures.Thisprocedurecanbeusedtodefinethedepthtoaspecificminimumhardnessorthedepthtoauniformhardness.Chemicalanalyticalmethodsarelimitedtospecimenswithsimple,uniformshapesandarebasedonanalysisofincrementalturningsoraftermillingatfixedincrements.Microscopicaltestsaregenerallysatisfactoryfordeterminingthesuitabilityofmaterialforintendeduse,specificationacceptance,manufacturingcontrol,development,orresearch.1.1Thesetestmethodscoverproceduresforestimatingthedepthofdecarburizationofsteelsirrespectiveofthecomposition,matrixmicrostructure,orsectionshape.Thefollowingbasicproceduresmaybeused:1.1.1Screeningmethods.1.1.2Microscopicalmethods.1.1.3Microindentationhardnessmethods.1.1.4Chemicalanalysismethods.1.2Incaseofadispute,therigorousquantitativeorlinealanalysismethod(see7.3.5and7.3.6)shallbetherefereemethod.Thesemethodscanbeemployedwithanycross-sectionalshape.Thechemicalanalyticalmethodsgenerallyrevealagreaterdepthofdecarburizationthanthemicroscopicalmethodsbutarelimitedtocertainsimpleshapesandbyavailabilityofequipment.Thesetechniquesaregenerallyreservedforresearchstudies.Themicroindentationhardnessmethodissuitableforaccuratemeasurementsofhardenedstructureswithrelativelyhomogeneousmicrostructures.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Theinch-poundequivalentsareinparenthesesandmaybeapproximate.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:
【国际标准分类号】:77_080_20
【页数】:10P.;A4
【正文语种】:
【原文标准名称】:钢试样的脱碳深度估计的标准试验方法
【标准号】:ASTME1077-2001(2005)
【标准状态】:现行
【国别】:
【发布日期】:2001
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E04.14
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:carboncontent;completedecarburization;decarburization;ferrite;microindentationhardness;partialdecarburization;steels;totaldecarburization
【摘要】:Thesetestmethodsareusedtodetectsurfacelossesincarboncontentduetoheatingatelevatedtemperatures,asinhotworkingorheattreatment.Resultsofsuchtestsmaybeusedtoqualifymaterialforshipmentaccordingtoagreeduponguidelinesbetweenpurchaserandmanufacturer,forguidanceastomachiningallowances,ortoassesstheinfluenceofprocessingupondecarburizationtendency.Screeningtestsaresimple,fast,low-costtestsdesignedtoseparatenon-decarburizedsamplesfromthosewithappreciabledecarburization.Basedontheresultsofsuchtests,theotherproceduresmaybeutilizedasapplicable.Microscopicaltestsrequireametallographicallypol-ishedcrosssectiontopermitreasonablyaccuratedetermina-tionofthedepthandnatureofthedecarburizationpresent.Severalmethodsmaybeemployedforestimationofthedepthofdecarburization.Thestatisticalaccuracyofeachvarieswiththeamountofeffortexpended.Microindentationhardnessmethodsareemployedonpolishedcrosssectionsandaremostsuitableforhardenedspecimenswithreasonablyuniformmicrostructures.Thisprocedurecanbeusedtodefinethedepthtoaspecificminimumhardnessorthedepthtoauniformhardness.Chemicalanalyticalmethodsarelimitedtospecimenswithsimple,uniformshapesandarebasedonanalysisofincrementalturningsoraftermillingatfixedincrements.Microscopicaltestsaregenerallysatisfactoryfordeterminingthesuitabilityofmaterialforintendeduse,specificationacceptance,manufacturingcontrol,development,orresearch.1.1Thesetestmethodscoverproceduresforestimatingthedepthofdecarburizationofsteelsirrespectiveofthecomposition,matrixmicrostructure,orsectionshape.Thefollowingbasicproceduresmaybeused:1.1.1Screeningmethods.1.1.2Microscopicalmethods.1.1.3Microindentationhardnessmethods.1.1.4Chemicalanalysismethods.1.2Incaseofadispute,therigorousquantitativeorlinealanalysismethod(see7.3.5and7.3.6)shallbetherefereemethod.Thesemethodscanbeemployedwithanycross-sectionalshape.Thechemicalanalyticalmethodsgenerallyrevealagreaterdepthofdecarburizationthanthemicroscopicalmethodsbutarelimitedtocertainsimpleshapesandbyavailabilityofequipment.Thesetechniquesaregenerallyreservedforresearchstudies.Themicroindentationhardnessmethodissuitableforaccuratemeasurementsofhardenedstructureswithrelativelyhomogeneousmicrostructures.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Theinch-poundequivalentsareinparenthesesandmaybeapproximate.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:
【国际标准分类号】:77_080_20
【页数】:10P.;A4
【正文语种】:
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