目前 ,工业上生产的最高γ值的冷轧板是将Ｃ含量降低到 2 0 μｇ/ｇ ,以Ｎｂ、Ｔｉ固定的ＩＦ钢在连续退火工艺下生产得到的ＥＤＤＱ材 ,其γ值为 2 2 ,可广泛用于汽车各部位。但是 ,对于油盘和侧外板这类复杂、宽幅的一体化板 ,要求比ＥＤＤＱ材具有更高γ值的钢板。为此 ,川 At present, the industrially produced highest γ-value cold-rolled sheet is an EDDQ material produced by a continuous annealing process with a C content reduced to 20 μg / g and a Nb, Ti-fixed IF steel having a γ value of 2 2 , Can be widely used in various parts of the car. However, for complex, wide-width, integrated panels such as oil pan and side panels, steel sheets having higher γ-values ​​than EDDQ materials are required. To this end, Sichuan