深层滚压加工对高碳铬轴承钢超长寿命疲劳行为的影响

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1、r42r5lVol.42No.52006c5h515

2、5208ACTAMETALLURGICASINICAMay2006pp.515{520h*FLB8@pA.?-,n^bT
v4;"!%(x]sa%rKy/7et'22D{610031)(-.)(a%)%,930-8555,)(D{0,-s\b,CD{610041)86*h*!N$HA?8Xh&kl-$Ub86*h*t^n!M08X}h&sO[54$RU[$R*I2]M0lOh&w}XKV!noM0?8X}h&sOoWm86*h*54lU$

3、R86*h*54`-KX*I2]M0?QK8lo>IfM0T}lOh&w}X8wblV!86*h*AV!!N$HnA?8X}l"fh&w}CM1A?8Xh&6*h*S{N2]M0Ht>UHTG111,TG135y}"m[Ay!H0412;1961(2006)05;0515;06INFLUENCEOFDEEPLYROLLINGPROCESSONULTRA{LONGLIFEFATIGUEBEHAVIOROFHIGHCARBON{CHROMIUMBEARINGSTEELLULiantaoStateKeyLaboratoryofTractio

4、nPower,SouthwestJiaotongUniversity,Chengdu6l0031SHIOZAWAKazuakiDepartmentofMechanicalandIntellectualSystemEngineering,ToyamaUniversity,Toyama930-8555,JapanJIANGYanChengduCityPublicTransportationGroupCompany,Chengdu610041Correspondent:LULiantao,associateprofessor,Tel:(028)87634355,E-m

5、ail:luliantao@hot.mail.comSupportedbyNationalNaturalScienceFoundationofChina(Nos.50471047and50323003)Manuscriptreceived2005{05{18,inrevisedform2005{11{20ABSTRACTIn uenceofdeeplyrollingprocessonfatiguebehaviorofhigh{carbonchromiuminvestigatedinultra{longliferegime.Theresultsareasfollo

6、ws:(1)intheregionbearingsteelwasofshortfatiguelifeandhighstressamplitudelevel,thefatiguecracksinitiateatthespecimensurfaceasthesameasthatbeforedeeplyrolling.Inthiscase,fatiguestrengthisimprovedlittleduetotheeectofcompressiveresidualstressinthespecimensurfacelayer(2)intheregionoflon

7、gfatiguelifeandlowstressamplitudelevel,thefatiguecrackinitiationsitestransferfromsubsurfaceintheteriorintherolledspecimens,wherethecompressiveresidualstressspecimensbeforeprocessingtoinandhardenedlayervanished.Inthiscase,fatiguestrengthisimprovedmuchmore(3)fatiguestrengthofthetested

8、bearingsteelinultralongliferegimeunderrotating-bendingloadcanbeimprovedbydeeplyrollingprocess.KEYWORDSultra{longlifefatigue,rollerprocessing,S{Ncurve,residualstress,bearingsteel4kLS
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