Abstract: Disclosed in the present application is a high-strength seamless steel tube resistant to carbon dioxide corrosion. In addition to containing Fe and inevitable impurities, the seamless steel tube comprises the following chemical elements in mass percentage: C: 0.05-0.18%, Si: 0.15-0.40%, Mn: 0.25-0.50%, Cr: 4.0-6.0%, Mo: 0.08-0.35%, Al: 0.020-0.055%, Ca: 0.001-0.004%; and one or more elements selected from Ti, Nb, V, Ce, and La, wherein 0.003%?Ti+Nb+V+Ce+La?0.20%. Also disclosed in the present application is a manufacturing method for the seamless steel tube. The method comprises the following steps: (1) manufacturing a tube billet; (2) subjecting the tube billet to heating, perforating, hot rolling, and sizing to obtain a hot-rolled tube; and (3) subjecting the hot-rolled tube to a quenching and tempering heat treatment: quenching within a temperature range of 860-940° C. for 15-120 min, and then tempering within a temperature range of 520-620° C. for 30-150 min.

Abstract: A rolling mill (1) which is suitable for performing hot stalling rolling includes: a housing (2); a first roller (9) mountable to the housing (2); a second roller (10) mountable to the housing (2), wherein the position of the second roller (10) relative to the housing (2) is adjustable, thereby adjusting the width of a roll gap (17) between the first roller (9) and the second roller (10), and wherein the roll gap (17) is configured to deform a workpiece (18) when the workpiece (18) is passed therethrough. The rolling mill provides the advantage of optimizing the rolling process.

Abstract: A rolling mill (1) which is suitable for performing hot stalling rolling includes: a housing (2); a first roller (9) mountable to the housing (2); a second roller (10) mountable to the housing (2), wherein the position of the second roller (10) relative to the housing (2) is adjustable, thereby adjusting the width of a roll gap (17) between the first roller (9) and the second roller (10), and wherein the roll gap (17) is configured to deform a workpiece (18) when the workpiece (18) is passed therethrough. The rolling mill provides the advantage of optimizing the rolling process.