唐郑磊, 许少普, 陆岳璋, et al. Heat Treatment Process of 245 mm Heavy Plate of Steel S500Q-Z35 for Seat Ring of Hydro-Power Station[J]. Special Steel, 2015, 36(3): 34-37.
唐郑磊, 许少普, 陆岳璋, et al. Heat Treatment Process of 245 mm Heavy Plate of Steel S500Q-Z35 for Seat Ring of Hydro-Power Station[J]. Special Steel, 2015, 36(3): 34-37.DOI:
54Ceq) is produced by KR desulphurized hot metal-120 t BOF-LF-VD-42 t ingot castingrolling-heat treatment process. According to principle of control of grain growth
the measuring CCT curves and critical thickness
as well as process test are carried out
it is obtained that with pre-quenching process-rapidly heating to 930 ℃ for 2. 0 min/mm
quickly cooling to 670 °C
the sub-critical quenching-rapidly heating to 880 ℃ for 2. 4 min/mm
with circle water + gas stirring cooling to ambient
and tempering treatment at 620 ~ 630 ℃ for 4 min/mm
air cooling to 400 ℃ and flatting
the surface structure of 245 mm heavy plate of steel S500Q-Z35 is sorbite
the structure in other parts is tempered bainite + ferrite
it has better comprehensive mechanical properties and has better properties of plate Z-direction.