A Study of the Optimum Quenching Temperature of Steels with Various Hot Rolling Microstructures after Cold Rolling, Quenching and Partitioning Treatment

作者：Chen, Bin; Liang, Juhua; Kang, Tao; Cao, Ronghua; Li, Cheng; Liang, Jiangtao; Li, Feng; Zhao, Zhengzhi^*; Tang, Di

来源：Metals, 2018, 8(8): 579.

DOI：10.3390/met8080579

• quenching and partitioning (Q&P)
• martensite matrix
• Ms temperature
• prior austenite grain

Quenching and partitioning (Q&P) processes were applied to a cold-rolled high strength steel (0.19C-1.26Si-2.82Mn-0.92Ni, wt %). The effects of the prior hot-rolled microstructure on the optimum quenching temperature of the studied steels were systematically investigated. The microstructure was analyzed by means of transmission electron microscope (TEM), electron backscatter diffraction (EBSD) and X-ray diffraction (XRD). Compared with the ferrite pearlite mixture matrix, the lower martensite start (Ms) temperature and smaller prior austenite grain size in the cold-rolled martensite matrix are the main reasons for the optimum quenching temperature shifting to a lower temperature in the Q&P steels. We found that an empirical formula that only considers the influence of the alloy composition in the calculation of the Ms temperature will cause a certain interference to the pre-determined optimum quenching temperature of the Q&P steel.

• 出版日期2018-8
• 单位北京科技大学