Microstructure, tensile and toughness properties after quenching and partitioning treatments of a medium-carbon steel

作者：Bagliani E Paravicini^*; Santofimia M J; Zhao L; Sietsma J; Anelli E

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2013, 559: 486-495.

DOI：10.1016/j.msea.2012.08.130

• Quenching
• Partitioning
• Tempering
• Retained austenite
• Bainite

The effect of different microstructures on the tensile and toughness properties of a low alloy medium carbon steel (0.28C-1.4Si-0.67Mn-1.49Cr-0.56Mo wt%) was investigated, comparing the properties obtained after the application of selected quenching and partitioning (Q%26P) and quenching and tempering (Q%26T) treatments. After Q%26T the strength-toughness combination was the lowest, whereas the best combination was achieved by Q%26P, as a result of the carbon depletion of the martensite and the high stabilization of the austenite. Nonetheless, the presence of islands of martensite/austenite (MA) constituents after Q%26P treatments prevented the achievement of toughness levels comparable to the ones currently obtainable with other steels and heat treatments.

• 出版日期2013-1-1