360-390 MPa grade low-alloy high-strength steel material and forging method thereof

The invention belongs to the technical field of low-alloy high-strength steel materials, and particularly relates to a 360-390 MPa grade low-alloy high-strength steel material and a forging method thereof. The raw materials of the steel material are improved, the microalloying thought that Mn and V serve as main alloy elements, and the Ni element serves as an auxiliary alloy element is adopted, the niobium element with the large segregation effect is not adopted, meanwhile, the preparation technology of a forge piece is improved, the yield strength of the obtained steel material ranges from 360 MPa to 390 MPa, the impact property at the temperature of-46 DEG C is larger than or equal to 100 J, and the steel material has the good mechanical property and the good mechanical property. The steel material is good in performance and can meet the requirements of forgings in the industries of wind power, maritime work, shipbuilding, underwater pipelines, oil and gas refining and the like. 本发明属于低合金高强度钢材料技术领域，具体涉及一种360