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A new type of hot-rolled transformation induced plasticity (TRIP) steel with 2.3%AI was developed to replaceconventional Si-bearing TRIP steel to improve surface quality of the steel sheet. The relationship between retainedaustenite volume fraction and hot-rolling processing was researched by Gleeble-2000 thermo-dynamic test for theAl-bearing steel. The experimental result showed that aluminum played an important role on retaining austeniteand the volume fraction increased from 4.4% to 7.5% as coiling temperature increased from 350°C to 450°C, whilecoiling temperature had a stronger effect on retaining austenite than finishing rolling temperature.
A new type of hot-rolled transformation induced plasticity (TRIP) steel with 2.3% AI was developed to replace conventionally Si-bearing TRIP steel to improve surface quality of the steel sheet. The relationship between retainedaustenite volume fraction and hot-rolling processing was researched by The experimental result showed that aluminum played an important role in retaining austenite and the volume fraction increased from 4.4% to 7.5% as coiling temperature increased from 350 ° C to 450 ° C whilecoiling temperature had a stronger effect on retaining austenite than finishing rolling temperature.