毛新平, 谢利群. Continuous Cooling Transformation Curves of Steel 30CrMo Produced by Thin Slab Casting and Rolling Process and Its Application[J]. Special Steel, 2012, 33(3): 44-46.
毛新平, 谢利群. Continuous Cooling Transformation Curves of Steel 30CrMo Produced by Thin Slab Casting and Rolling Process and Its Application[J]. Special Steel, 2012, 33(3): 44-46.DOI:
The continuous cooling transformation ( CCT) curves with cooling rate 0. 03 ~ 15. 60 T/s of Steel 30CrMo (/% : 0. 32C
0. 20Si
0. 60Mn
0. 20Ni
0. 97Cr
0. 18Mo) 6 mm plate continuous-rolled by 56 mm thin slab are measured by using dilatation method and the microstructure of steel with different cooling rate is observed to get the phase transformation point of steel 30CrMo- Ac3 = 800 ℃
Act =735 °C
Bs =510 ℃
Ms = 340 °C and Mf = 220 ℃. Application results show that the cooling rate of 6 mm plate after coiling is ≤0. 06 ℃
as coiling temperature is 610 ~640 ℃,the structure of steel 30CrMo is ferrite + pearlite
it is available to avoid forming bainite structure that leads to obvious increase of strength of steel and deterioration of plasticity of steel.