申丽娟, 邢淑清, 麻永林, et al. Formation Mechanism and Structure Evolution of Austenitic Stainless Steel 304 during Solidification with Near-Rapid Rates[J]. Special Steel, 2012, 33(4): 53-56.
申丽娟, 邢淑清, 麻永林, et al. Formation Mechanism and Structure Evolution of Austenitic Stainless Steel 304 during Solidification with Near-Rapid Rates[J]. Special Steel, 2012, 33(4): 53-56.DOI:
The effect of Creq/Nieq and cooling rate (1.5 ~ 1 000 Y/s) on structure morphology and distribution of as- cast solidification structure of austenite stainless steel 304 (/% : 0. 053C
0. 55Si
1. 50Mn
0. 030P
0. 002S
17. 02Cr
8. 01 Ni
0. 50Cu
0. 08Mo) is studied by induction furnace melting the steel and direct-casting on a water-cooling copper mold to get a sample with 7 mm thickness and 25 mm diameter. Results show that with increasing cooling rate to 75 ~ 90 ℃/s
the primary solidification mode of steel transferred from FA (ferrite-austenite) mode to AF (austenite-ferrite) mode
the primary phase is modified from dendritic ferrite to dendritic austenite
as the cooling rate is - 1 000℃/s
the blocky ferrite structure is observed
and the dendritic austenite is replaced by cellular austenite.