周雯, 吴开明, 王厚昕, et al. Hot Plasticity of Casting Slab of Nb-Ti Microalloying High Performance Steel Q370qE-HPS for Bridge Beam at 700-1050 ℃[J]. Special Steel, 2015, 36(5): 55-58.
周雯, 吴开明, 王厚昕, et al. Hot Plasticity of Casting Slab of Nb-Ti Microalloying High Performance Steel Q370qE-HPS for Bridge Beam at 700-1050 ℃[J]. Special Steel, 2015, 36(5): 55-58.DOI:
With using Gleeble-1500D thermal/mechanical simulation testing machine
the hot plasticity of 230 mm x 1400 mm casting slab of developed high performance steel Q370qE-HPS for bridge beam (/% : 0.09C
0.36Si
1.33Mn
0.013P
0.004S
0.036Nb
0.015Ti
0.022Als
0.33CEV) at 700-1050℃ has been tested and studied. Results show that the high hot plasticity zone of high performance steel Q370qE-HPS for bridge beam is at 800-1050℃
as compared with traditional normalized steel Q370qE for bridge beam (/% : 0.14C
0.38Si
1.45Mn
0.012P
0.004S
0.028Nb
0.014Ti
0.023Als
0.38CEV) the high plasticity zone of steel Q370qE-HPS is larger j and the low plasticity of steel is at 700-800℃
in this zone the ferrite lath formed at austenite grain boundaries has low tensile strength especially as the Nb-Ti carbo-nitrides exist grain boundaries
the crack and void form easily by charging stress led to deteriorate the hot plasticity of steel.