摘要
研究了高性能桥梁钢(%:0.07C、1.52Mn、0.17Si、0.003S、0.013P、0.30Cr、0.40Ni、0.68Cu、0.19Mo、0.01V、0.01Ti、0.04Nb)250 mm铸坯在二段控轧控冷(1 006～979℃和813～782℃)至30 mm板和600℃回火过程中含Nb、Ti和Cu第二相的析出行为。结果表明,在控轧控冷及随后的回火过程中均有第二相析出:在高温轧制区,≥50 nm立方形的TiC首先析出,随后的变形过程中,10～25 nm NbC析出;在回火过程中NbC依附于TiC形核长大,同时也观察到3～30 nm Cu弥散析出。
The precipitating behavior of secondary phases bearing Nb, Ti and Cu in high performance bridge steel （%： 0.07C, 1.52Mn, 0. 17Si, 0.003S, 0.013P, 0.30Cr, 0.40Ni, 0.68Cu, 0. 19Mo, 0.01V, 0.01Ti, 0.04Nb） in two stage control rolling and cooling process （ 1 006 -979 ℃ and 813 -782 ℃ ） from 250 mm casting slab to 30 mm plate and in tempering at 600 ℃ has been studied. Results show that there are precipitates of secondary phases during all control rolling and cooling process and later tempering process ： in higher temperature rolling zone the ≥50 nm cubic TiC particles are first precipitating, in flowing deformation process the 10 -25 nm NbC particles precipitate; during tempering process the NbC particles nucleate attached to TiC particles and grow up, besides, the 3 - 30 nm Cu dispersed precipitates are observed.
出处
《特殊钢》
北大核心
2011年第3期54-57,共4页
Special Steel
关键词
桥梁钢
控轧控冷
回火
第二相析出
Bridge Steel, Control Rolling and Cooling, Tempering, Precipitates of Secondary Phases
