磁场热处理及其应用和发展前景

(,266021):,,:;;;:TG156.97:A:1008-1690(2004)04-0017-003MagneticHeatTreatmentandItsProspectsinApplicationsandDevelopmentSUNZhong-ji(QingdaoCastingMachineWorks,Qingdao266021)Abstract:Mechanismandeffectivenessformagneticheattreatmenttostrengthensteelswerebrieflydescribed.Themagneticheattreatmentiscomparedwithcommonthermo-mechanicaltreatment.Theapplicationsofthemagneticheattreatment,suchasmagneticquenchingforcold-punchingdies,magnetictemperingandsoon,wereintroduced.TheDevelopmentofthemagneticheattreutmentwaspredicted.KeyWorks:magneticquenching;magnetictempering;latticedistortion;strengthening1,,,,(),,,,,,22.11ABCDEF[1],,2.2[2],,1,1Fig1Schemeofmagneticfieldquenchingprocess:2003-05-19:(1936.4),,,10,1,1712004194AB,CD,DE,EF[2]3[2],,0.76(kg/mm2/%);,0.50(kg/mm2%);,0.63(kg/mm2/%)Ak47J,A10.5%,Z39%,Ak37J,A11.4%Z36%,,,,,11.5HRC,16%,20%50%,(Q635),2.5mm,2[3]4G(),,1:,6000A/m,1Table1ComparisonbetweenlifeofmagneticfieldquenchedandcommonlyquencheddiesLDW18Cr4V1LD9CrSi60Si2A2312230.61246868461.52671988,,,0.52,,5,,,[4],W6Mo5Cr4V2,,,10kW,,1000A/m10mm10mm55mm(),10mm10mm120mm5.1,560,,22,56045min2,(65HRC),5601.5h3(64.5HRC)56045min22W6Mo5Cr4V2(1200560)Fig2EffectofpulsedmagneticfieldonhardnessofW6Mo5Cr4V2steelaftertempering5.234,5.35W6Mo5Cr4V21225,5,,81200419431225W6Mo5Cr4V241225W6Mo5Cr4V2Fig3EffectoftemperingmethodonbendingstrengthofW6Mo5Cr4V2steelquenchedfrom1225inoilFig4EffectoftemperingmethodonimpacttoughnessofW6Mo5Cr4V2steelquenchedfrom1225inoil5W6Mo5Cr4V2Fig5EffectoftemperingprocessesonresidualstressinW6Mo5Cr4V2steel,W6Mo5Cr4V2,:56045min2;:5601.5h3,2,,1/2,,2W6Mo5Cr4V2Table2ComparisonbetweenresidualaustenitecontentsinW6Mo5Cr4V2steelafterpulsedmagneticfieldtemperingandcommontempering(56031.5h)(560245min)(%)2266.1,,6.2[1],,,,,6.3,,,,,[1].[J].,2002(1):3940[2].[M].,1979:328329[3].[J].,1987(12):3134[4],,.90kW1,,,912004194