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Abstract: The microstructure and mechanical properties of JQ275 high-strength steel were investigated. The results show that the steel exhibits a good combination of strength and toughness, with a yield strength of 275 MPa and a tensile strength of 420 MPa. The microstructure consists of ferrite, pearlite, and a small amount of bainite. The excellent mechanical properties are attributed to the optimized microstructure and the presence of nanosized precipitates.
