陈俊, 陈晨, 罗恒勇. Effect of Nb-V Microalloying 0.15 - 0.35Mo Content and Rolling Temperature on Properties of Fire-Resistant Steel for Building[J]. Special Steel, 2019, 40(3): 49-52.
陈俊, 陈晨, 罗恒勇. Effect of Nb-V Microalloying 0.15 - 0.35Mo Content and Rolling Temperature on Properties of Fire-Resistant Steel for Building[J]. Special Steel, 2019, 40(3): 49-52.DOI:
Tested steels are melting by a 50 kg medium induction furnace and rolling to 13 mm plate. The effect of rolling temperature (1 010 ~ 1 050 ℃) of tested steel 0.15Mo
R2- 0.15MoV
R3- 0.35MoNbV
R4- 0.35MoNbVB and R5- 0.35MoNbVTiB on properties of the steels has been tested. Results show that the R3 steel (/% : 0.04C
l. 12Mn
0.32Si
0.018P
0.023S
0. 35Cr
0.35Mo
0.025Nb
0.15V) rolled at 1 030 T has excellent comprehensive properties i. e. tensile strength 598 MPa
yield strength 514 MPa
elongation 28%
ratio of yield-tensile strength 0. 86
the HV hardness scale before and after tempering at the temperature of 600 ℃ respectively being 215 and 204
and impact energy of steel at 0 ℃ being 124 J
and the yield strength of steel at 600 ℃ being 355 MPa with ratio of yield-tensile strength 0. 69 to meet the requirement of state standard for fire-resistant steel.