Effect of Cooling After Rolling on Microstructure and Properties of Ultra High Strength Steel with Boron
Comparing the influences of two different kinds of cooling after rolling on microstructure and properties of ultra strength steel with boron, the bainite + ferrite microstructure could be gained by spray water cooling to 450℃ and then natural cooling to room-temperature, therefore, the high yield strength and tensile strength of the testing steel could be gained. Ferrite + fine pearlite + little bainite microstructure could be gained by natural cooling to room-temperature after rolling, the tensile strength of the testing steel is lower 260 MPa than that of the former.