1. School of Materials Science and Engineering， Kunming University of Science and Technology， Kunming 650093，Yunnan， China 2. Institute for Special Steel， Central Iron and Steel Research Institute， Beijing 100081， China
Abstract：Equilibrium precipitation phases of LF2 alloys were studied by using a thermodynamic Thermo-Calc software， microstructure and mechanical properties of LF2 alloys bearing different Ti content were studied by using scanning electron microscopy， transmission electron microscopy， subtle phase analysis and tensile test. The results show that γ′ phase is diffusely distributed in transgranular substantially spherical which size is about 20 nm. Laves phase precipitated with fibrous and block in the grain boundary. With the increase of Ti content of， the content of γ′ phase increased， Ti content has increased 0.92 percent， the quality percentage of Laves phase is 1.35 times of the original， the content of Laves phase increased， transforming fibrous into short clavate shape. With the increase of Ti content， the strength of LF2 alloys increases， strengthening effect of γ′ phase is relatively weak， but γ′ phase is still the main strengthening phase.
薛丞丞，王立民，蒋业华，刘正东，杨 钢. 钛质量分数对LF2合金微观组织与性能的影响[J]. 钢铁, 2015, 50(5): 75-80.
XUE Cheng-cheng，，WANG Li-min，JIANG Ye-hua，LIU Zheng-dong，YANG Gang. Effect of Ti content on microstructure and performance of LF2 alloy. Iron and Steel, 2015, 50(5): 75-80.
2015, Vol. 50 
