Production method of hot coiled X65 pipeline steel

The invention belongs to the technical field of steel production, and relates to a production method of hot coil X65 pipeline steel, and the X65 pipeline steel comprises the following components in percentage by mass: 0.05%-0.08% of C, less than or equal to 0.24% of Si, 1.55%-1.68% of Mn, less than or equal to 0.018% of P, less than or equal to 0.005% of S, 0.040%-0.052% of Nb, 0.040%-0.056% of V, 0.010%-0.020% of Ti, 0.020%-0.040% of Als and the balance of Fe and inevitable impurities. The production process comprises the steps of molten iron pretreatment, converter smelting, external refining, continuous casting, slab heating, rolling, laminar cooling and coiling. According to the method, the weldability of the pipeline steel is improved by combining the Gravile diagram of the carbon content and the welding relation of the steel and adopting chemical components with low C, low P and S elements and proper alloy elements. And nitrides of Ti, Al and the like and oxides of Ti are properly controlled, so that th