吕晓芳, 孙伟, 杜慧起. Effects of Controlled Rolling and Controlled Cooling on Microstructure and Mechanical Properties of Low-Alloy Steel Q355D Heavy Plates[J]. Special Steel, 2021, 42(2): 68-71.
吕晓芳, 孙伟, 杜慧起. Effects of Controlled Rolling and Controlled Cooling on Microstructure and Mechanical Properties of Low-Alloy Steel Q355D Heavy Plates[J]. Special Steel, 2021, 42(2): 68-71.DOI:
The 250 mm casting slab of steel Q355D bearing 0. 14% ~ 0. 18% C and 1.40% ~ 1.60% Mn is hot-rolled by the controlled rolling process. The results show that the microstructure of rolled plate is fine and uniform by rough rolling at 1050 - 1130℃
finishing rolling at 920℃ and final rolling at 880 ℃
and the final cooling below 670℃
the properties of the 70 mm and 80 mm thick plate can meet the requirements of Q355D steel grade and the Z25 reduction of area (RA) is 58% 〜64% to meet the requirement of Z25 directionRA≥25%.