沈奎, 麻啥, 王世芳, et al. Effect of Cleanliness and Thermo-Mechanical Process on Plasticity Index of Hot Rolled Steel SCM435 Coil[J]. Special Steel, 2012, 33(5): 61-64.
沈奎, 麻啥, 王世芳, et al. Effect of Cleanliness and Thermo-Mechanical Process on Plasticity Index of Hot Rolled Steel SCM435 Coil[J]. Special Steel, 2012, 33(5): 61-64.DOI:
Experimental results obtained that the main causes of low plasticity indexes of Φ12 mm hot rolled coil of steel SCM435 (/% : 0. 34 〜0. 35C
0. 98 〜1.00Cr
0. 19 ~0. 21 Mo) are size 50 -60 μm large calcium aluminate inclusion formed by slag entrapment in tundish and mold
and formed 8% ~ 10% martensite due to lack of enough time for bainite phase transformation. With (a) extending LF refining soft stirring time
using shielding casting and slag detecting system
stabilizing cast speed to reduce slag entrapment and larger inclusions; and ( b) improving control cooling process to reduce martensite content in structure
the elongation and reduction of area of hot rolled coil increase respectively from original 3. 9% 〜10.0% and 4.7% -39.3% to 10.6% -11.0% and 39. 9% 〜43. 6%.