| 主权项 |
1. An Interstitial free ferritic steel strip or sheet comprising, in weight percent,
up to 0.01% C_total; up to 0.2 % Si; up to 1.0% Mn; from 6 to 9% Al; up to 0.010% N; up to 0.080% Ti up to 0.080% Nb; up to 0.1% Zr; up to 0.1% V; up to 0.01% S; up to 0.1% P; up to 0.01% B remainder iron and inevitable impurities;wherein C_total<=Minimum[X,Y]
+Maximum[Z,0]+12/93*Nb+12/91*Zr+12/51*V;whereinX=2*12/(2*32)*S;Y=2*12/(4*48)*(Ti−48/14*N);Z=12/48*(Ti−48/14*N−4*48/(2*32)*S);whereinMinimum[X,Y]=lower value of X and Y and Minimum[X,Y]=zero if Y is negative;Maximum[Z,0]=higher value of zero and Z;C_solute=C_total
Minimum[X,Y] Maximum[Z,0] 12/93*Nb 12/91*Zr 12/51*V;and wherein C_solute is equal to or smaller than zero. |
