GCr15钢轴承残留奥氏体_尺寸精度及疲劳寿命试验研究_钱坤

GCr15,(杭州职业技术学院,浙江杭州310018):7205C/P57205C/P4,,,GCr15:;;;:TG156;TG162171:A:0254-6051(2007)09-0090-03RetainedAustenite,DimensionalPrecisionandFatigueLifeofGCr15SteelBearingsQIANKun,TAOShan(HangzhouVocational&TechnicalCollege,HangzhouZhejiang310018,China)Abstract:Theprocessexperimentsof7205C/P5precisionbearingand7205C/P4ultra-precisionbearingwerecarriedou.tBasedonthedifferentheattreatmentprocesses,effectsoftheretainedaustenitecontentonthedimensionalstabilityandfatiguelifeofbearingswerediscussed.ThesuitablecontentofretainedausteniteinGCr15ultra-precisionbearingwassuggested.Keywords:super-precisionbearing;retainedaustenite;dimensionalstability;fatiguelife,/0,,,7205C/P5,7205C/P4,7205C/P4,,10000r/min,315L10h520-01007,250-01005,,17205C/P5精密轴承套圈试验分析GCr15,1,GB/T18254-20021(,%)Table1Chemicalcompositionandstandardvalueofrawmaterials(wt%)CCrMnSiPS0195~11051140~11650125~01450115~0135[01027[0102001991152013601280101101010:(1962)),,,,,:0571-86916891,13588868016E-mai:[e-mail]:2007-05-121117205C/P51,8h,,:2~3,63~64HRCJB/T1255)200117205C/P5Fig.1Heattreatmentprocessofthe7205C/P5bearingrings1127205C/P510000r/min,,45~85e,,,-196e@15min,90200732920e,01002mm,NTNKOYO-196e,7205C/P5,,7205C/P51017205C/P510250,20e7205C/P51017205C/P5102,,,,,227205C/P5Table2Testresultsofthe7205C/P5bearingrings/mm/mm7205C/P5101010075~010190101157205C/P510201005~01013010088192%2,7205C/P5,GCr15,,,,,27205C/P4超精密轴承套圈试验2117205C/P4P4GCr15,P4,22aA,5e,3h,16h6215~6315HRC2bB-(60~70)e,315h,16h6215~6315HRC27205C/P4A(a)B(b)Fig.2HeattreatmentprocessA(a)andB(b)for7205C/P4bearingrings2127205C/P47205C/P4,50,,33,7205C/P4AB,;B,,;,,,515%~915%37205C/P4Table3Measurementresultsofthe7205C/P4bearingrings7205C/P41017205C/P4102[01001mm[01001mmA01000~010025mm78%01000~01002mm92%4185%B01000~010015mm98%01000~01001mm100%3107%:A50010025mm3轴承疲劳寿命试验311[6]:L10h=10660nCPE,P=XFr+YFa912007329L10h)(h);n)(r/min);C)(N);E);P)(N);Fr)(N);Fa)(N);X);Y)P=1172kN,C=1615kNE=3;n=11500r/minL10h=10660nCPE=1279h3123:7205C/P5(P4)7205C/P4A7205C/P4B,P410,44Table4Fatiguelifeofthebearingswithdifferentprocesses/h(%)7205C/P552404.10L10h101.57205C/P4A51604.03L10h1007205C/P4B49103.84L10h95.1,315L10h,7205C/P57205C/P4(A),7205C/P4(B)419%,,,3%~9%,,6%~9%,7205C/P57205C/P4(A)115%,,,4结语(1),(2),;,,,(3),(4),5%~6%AR:[1].[M].:,1988.[2],.[M].:,2000.[3].(1)[M].:,2002.[4],,,.[J].,1995(12):30-38.[5],,,.[J].,2005(11):38-44.[6].()[M].:,2006.1,1,1,2,1,1(11广东出入境检验检疫局技术中心,广东广州510623;21浙江出入境检验检疫局,浙江杭州310012)FailureAnalysisonGearPumpTANYing1,CAOBiao1,CHENMing1,ZHANGDe-shi2,HUBao-ju1,LIXiao-min1(11TechnologyCenter,GuangdongEntry-ExitInspectionandQuarantineBureau,GuangzhouGuangdong510623,China;21ZhejiangEntry-ExitInspectionandQuarantineBureau,HangzhouZhejiang310012,China):TG14211:B:0254-6051(2007)09-0092-04:(1959)),,,,,20:020-38290519E-mai:[e-mail]:2007-03-26,,280e,,15r/min,14MPaSACM645(38CrMoAl),SKD11(Cr12Mo1V1)1a,,110mm,,(1a),70mm@80mm,18315mm,18012mm,18015mm,922007329