Microstructural evolution in 35CrMnSi steel during multi-cyclic quenching and partitioning heat treatment

作者：Li Yang; Xiao GuiYong; Chen LuBin; Lu YuPeng^*

来源：Science in China - Series E: Technological Sciences , 2013, 56(10): 2581-2585.

DOI：10.1007/s11431-013-5341-z

• steels
• martensitic phase transformation
• quenching and partitioning
• EMPA

A novel method, i.e. multi-cyclic quenching and partitioning (M-Q-P) heat treatment, is used to tailor the content of retained austenite (RA) in commercial steels. For 35CrMnSi steel, 5 times of Q-P heat treatment can increase the content of RA from 8 vol. % to 17 vol. %. As a result, the ultimate elongation of the steel is improved from 17.4% after the typical Q-P heat treatment to 27.1% after 5 times of Q-P treatment. Meanwhile, the improved combination of strength and ductility for steels by typical Q-P heat treatment is retained by the multi-cyclic Q-P heat treatment. It is shown that the content of RA in some specific steels, and furthermore their mechanical properties, can be regulated through the M-Q-P.

• 出版日期2013-10
• 单位山东大学