胡辉, 董志华, 陈登福, et al. Elevated Temperature Mechanical Properties of High Strength Weathering Steel Q450NQR1 in Thermal Cycle Process[J]. Special Steel, 2011, 32(6): 47-49.
胡辉, 董志华, 陈登福, et al. Elevated Temperature Mechanical Properties of High Strength Weathering Steel Q450NQR1 in Thermal Cycle Process[J]. Special Steel, 2011, 32(6): 47-49.DOI:
plastic modulus and reduction of area high strength weathering steel Q450NQR1 200 mm x 1 35O_ nim casting slab (/%: 0. 05 - 0. 10C
0. 30 〜0. 50Si
0. 80 〜1.00Mn
≤0. 020P
≤0. 008S
0. 20 ~ 0. 40Cu
0. 15 〜0. 35Ni
0. 40 - 0. 60Cr) with heat tensile strain rate 5 x 10
-3
s
-1
at 700 〜1 000 °C have been studied and measured by using Gleeble-1500D thermo-mechanical simulator. Results show that with decreasing temperature the plastic modulus (hardening coefficient) and strength of casting slab increase
the change rate of strength of slab with temperature obviously alters at 800 °C; the reduction of area of slab at 925 ~ 700°C is ≤60% ; in order to ensure the quality of slab
during straightening process the surface temperature of slab should be controlled ≥950 °C.