High-surface-quality and high-strength steel as well as preparation method and application thereof

The invention discloses high-surface-quality and high-strength steel and a preparation method and application thereof, and relates to the technical field of steel manufacturing. The high-strength steel is composed of the following elements in percentage by weight: 0.085%-0.18% of C, 0.9%-1.65% of Mn, 0.01%-0.25% of Si, 0.05%-0.2% of Cr, 0.01%-0.05% of Nb, 0.01%-0.08% of Ti, 0.05%-0.5% of Ni, less than or equal to 0.005% of S, less than or equal to 0.020% of P and the balance of Fe and inevitable impurities. Through the design of high-strength steel components and the hot rolling process, the surface oxide scale structure of a hot-rolled finished product is optimized, the thickness of the oxide scale is reduced, falling of the oxide scale in the decoiling process is obviously reduced, the generated problem that oxide is pressed into pits is avoided, and the excellent steel plate surface quality is obtained. 本发明公开了一种高表面质量高强钢及其制备方法与应用，涉及钢铁制造技术领域；该高强钢由以下重量分数的元素组成：C：0.085％～0.18％，Mn：0.9％～1.65％，Si：0.01％～0.25％，Cr：0.0