公式英文
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2023年3月19日发(作者：春暖鸭先知)RelatedFormulas
-Calculationofsometransformationtemperatures(s….)
Ac
3
(°C)=
910-203(C)-15.2Ni+44.7Si+104V+31.5Mo+13.1W-(30Mn+11Cr+20Cu-70
0P-400Al-120As-400Ti)
Ac
1
(°C)=723-10.7Mn-16.9Ni+29.1Si+16.9Cr+290As+6.38W
M
s
(°C)=539-423C-30.4Mn-17.7Ni-12.1Cr-7.5Mo
-Transformationofaustenitetoferriteafterhotrolling(ChiakiOuchietal,Tetsuto
Hagane,67(1),Jan.1981)
Ar
3
(°C)=910-310C-80Mn-20Cu-15Cr-55Ni-80Mo+3.5(t-8)
t=platethickness(mm)
Ar
3
dependenceoncoolingrateV(°C/s)(unpublisheddata)
Ar
3
(°C)=(-)forC=0.029,Mn=0,57,Nb=0,09
Ar
3
(°C)=(-)forC=0.11,Mn=1.06,Cu=0.16,Mo=0.15,V=0.034,
16ppmB
Ar
3
(°C)=(-)for.C=0.11,Mn=0.88,Cu=0.34,Cr=0.90,Mo=0.37
-Austeniterecrystallizationstoptemperature(,….)
Tnr(°C)=897+464C+[6445Nb-644(Nb)]+[732V-230(V)]+890Ti+363Al-357Si
-Bainitestarttemperature
Bs(°C)=719-127C-50Mn-31Ni-27Cr-61Mo(&
Steelmaking18(8),Aug.1990)
Bs(°C)=830-270C-90Mn-37Ni-70Cr-83Mo(StevenandHayes..)
-SusceptibilitytoStressreliefcrackinginweldjoints
JembrittlementFactor=(%Si+%Mn)*(%P+%Sn)*10-4=200(maximum)
BruscatoParameter=(10P+4Sn+15Sb+As)/100<23(elementsinppm)
-HardenabilityParameterincontrolledrolledacicularferritesteels
HP=32,5Mo+10(Mn+Cr)+2,5Ni>23,whenyieldpointelongationtendstozero(C.M.
forlinepipeandpipelinefittings…)
-CarbonEquivalentValue(Generalreference:HruyoshiSuzuki,Weldabilityof
modernstructuralsteels)
CE(InternationalInstituteofWelding)=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15
CEN(Yurioka)=C+A*(Si/24+Mn/6+Cu/15+Ni/20+(Cr+Mo+Nb+V)/5+5B
A=0,75+0,25*tanh[20(C-0,12)]Adependsoncarboncontentasfollows
%C<0.060.060.070.080.090.100.110.120.130.140.15
A0.530.540.560.580.620.660.700.750.800.850.80
Pcm=Crackingcarbonequivalent
=C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/10+5B
CE(Graville)=C+Mn/16-Ni/50+Cr/23+Mo/7+Nb/8+V/9
-Globularizationofnonmetallicinclusions(oxidesandsulphides)incalciumtreated
steels
ACR(AtomicConcentrationRatio)=0,80*(Ca/S)*(1-98*O>1,8
andCa/S>2,0