Flux-cored wire capable of bearing 150kJ/cm heat input for crude oil storage tank steel electro-gas welding

The invention discloses a flux-cored wire capable of bearing 150kJ/cm heat input for crude oil storage tank steel electro-gas welding, which belongs to the technical field of welding materials, comprises a welding wire sheath and powder filled in a cavity of the welding wire sheath, and is characterized in that the powder comprises the following components in percentage by mass: 20-30% of rutile, 1-3% of sodium fluoride, 2-6% of potassium feldspar, 3-5% of quartz, 5-8% of silicon iron, 15-20% of electrolytic manganese and 5-10% of nickel powder, the alloy comprises the following components in percentage by weight: 0.5-3% of copper powder, 2-3% of ferromolybdenum, 0.5-2% of ferrotitanium, 0-1% of tin powder, 1-3% of rare earth oxide and the balance of iron powder and inevitable impurities. The flux-cored wire has excellent welding process performance, and under the welding heat input of 80-150 kJ/cm, weld joint deposited metal meets the conditions that ReL is larger than or equal to 490 MPa, Rm is larger than