李维娟, 康小兵. Effect of Dissolution and Precipitation of Nb-Ti Carbides on Structure and Properties of Low Carbon Microalloying Steel[J]. Special Steel, 2006, 27(6): 4-6.
李维娟, 康小兵. Effect of Dissolution and Precipitation of Nb-Ti Carbides on Structure and Properties of Low Carbon Microalloying Steel[J]. Special Steel, 2006, 27(6): 4-6.DOI:
The dissolution and precipitation of Nb-Ti carbides in austenite of a low carbon microalloying steel (0.09C
1.42Mn
0.035Nb
0.012Ti)have been analyzed by theoretical calculation method
and the austenite grain size with different heating temperature and the hardness of steel after solid solution treatment -aging were examined. The results showed that Nb-Ti carbide completely dissolved at 1060 ℃ and almost Nb and Ti in austenite precipitated in the form of NbC and TiC at 800 ℃ aging. At 700 ℃ aging the Nb-Ti carbides precipitated in ferrite
and with decreasing temperature the carbides precipitation decreased. The hardness of steel was up to maximum value as aged at 600 ℃.