| 摘要 |
A dual-phase steel strip is produced by heating a hot rolled steel strip to a temperature within the intercritical temperature range, annealing the heated strip for a period of from 15 seconds to 5 minutes, and controlling the average cooling rate to about 3.6F. DEG -45F. DEG /sec. (2C. DEG -25C. DEG /sec.) down to the martensite formation temperature of about 850 DEG F.+/-100 DEG F. (454 DEG C.+/-56 DEG C.). The hot rolled strip will have a chemical composition of 0.08 to 0.12% C, 1.25 to 1.8% Mn, 0.5 to 0.7% Si, and 0.1 to 0.7% Cr, the balance being substantially Fe.
|
