各种热处理工艺介绍

44.14.1.1zzzAc1Ac3Ac1Ac31Ac320~30Awc=0.3~0.6%AccmAFe3C1AF+P5002AAAr1APAc3(Ac1)AÆPAw(c)0.6(10)3Ac1~Ac3()Ac1~Accm()4Ac120~302~4hAr120a)Ac120~302b)Ar1Ar110~30500c)5Ac3Accm100~2006Ac1500~650A17100~20010~15T=0.4T45034zzzzz4.1.2Ac3Accm30~50F+SSFe3CII+Si.ii.iii.“”P1.w(C)0.25w(C)=0.25~0.552.w(C)=0.753.AC(5)1~2.5min/mm64.1.3Ac33050Ac13050A1.(1)a.Ac330~50MAc1~Ac3b.Ac130~50zAccmAAMsMfA′zAzzAc1AMM(2)kDtα=tminamin/mmkDmm7zzz8zz0.6(3)650~550650650~400APB400MsM650~400M300~200650~550(4)912AMsM3AMsMM104AMsBBBBM112.M“”(GB225-63)(Φ25×100mm),,12.5mm,65±5mm,2030,,,,0.2-0.5mm,,,,,,GB225-63,dHRCJJdHRC542J,5mm42HRC12MMMMMMMM(),40Cr45,30mm40CrNiMo,,,30mm40,+,(1)13(2)C,,A(3)(4),,+,,3.1.AMM2.AM4.1)142)3)z4)zzzMs15zb)c)d)e)f)g)h)a)10~30mm16zzb)¾¾¾¾¾a)b)5~6mmc)d)-Msa)¾H17¾¾c)¾4.1.4,,Ac1ε00400ε¾ab,,1.M2.MA′3.80200εε2003003Fe3C40018400(1)150250M+A′((2)350500(T)(T45HRC500~650SS400500M+A′(M)α58HRC64HRC)MM)35HRC(3)SSS’T’M’19,250400450650,zz--200ε-100200250250ε-200-300300400600zM2504004506501.250400203003002.500-650CrNiMnSi550550SbSnPAsNiCrMnMoW12321221.(),,VSiMoWNiCo2.MoWV,,(400)(550),450,;450,Mo2CW2CVC,,23MnMoWCrNiCoVVMoWCrNiCo,3.,,450600(),MnCrNi,()MoW(0.5%Mo,1%W)4.21.242.δmmfHzf2020=δ20f500800=δ800δ800δ201)100500kHz200300kHz0.52.0mm2)50010000Hz25008000Hz35mm3)50Hz1015mm1002001802003.(1)Ac380150,,(2),,(3)(4)404540Cr40MnB2530004.312CO→CO2[C]COH2…→H2O[C]CH4→2H2[C]2NH3→3H22[N]26N2239009501.00.10.3202020CrMnTiCr1.9009501520%3BaCO32CONaCOOC⇒+;;COBaOBaCO+⇒COCCO⇒+[]COC][CCOCO+⇒90095027][CCOCO+⇒;][COHHCO+⇒+][)(CnHnHCnn++⇒+2.90095090095010.20.3mm3AcPFP+900950δττδK=K3.(1),,,,,,830850(2),Ac3,Ac13050,,,(3),,Ac33050,,Ac13050(4)(150200)4.(1)58HRC64HRC,,30HRC45HRC(2)2835CrAlA,38CrMoAlA,38CrWVAlA1.2NH3→3H2+2[N]),,,150060020h50h2,292.(1)(1000HV1100HV),600650,εγ′αγ′(2),,,(3),(4)ε,,38CrMoAl400Fe-N1.8308501h2h0.2mm0.5mm,2.¾,,¾,,304.4,,,(1)(2),,,(3)1.,1.3×102Pa1.3×103Pa,500560,Fe2NFe4N,34,,,,1-;2-;3-;4-;5-;6-2.++530580W18Cr4VFe2-3(N,C),FeSFe3S4,,310.30.5453mm1520mmkW75mmW18Cr4V+32