Hot-rolled structural steel ST52 medium-thick plate with thickness of 15-60mm and production method thereof
A production method and technology for structural steel, applied in metal rolling, temperature control, metal rolling, etc., can solve the problems of poor steel quality and cumbersome production of thick plates.
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Embodiment 1
[0022] Through KR molten iron pretreatment, converter smelting, argon blowing treatment, LF refining, VD refining, continuous casting, heating, controlled rolling and controlled cooling, and stack cooling processes, a 15-60mm thick hot-rolled structural steel ST52 medium plate is obtained. Contains the following chemical composition in mass percent (unit, wt%): C: 0.11, Si: 0.44, Mn: 1.22, P: 0.015, S: 0.001, Als: 0.050, Nb: 0.020, Ti: 0.019, others are Fe and residual elements.
Embodiment 2
[0024]Through KR molten iron pretreatment, converter smelting, argon blowing treatment, LF refining, VD refining, continuous casting, heating, controlled rolling and controlled cooling, and stack cooling processes, a 15-60mm thick hot-rolled structural steel ST52 medium plate is obtained. Contains the following chemical composition (unit, wt%) in mass percentage: C: 0.15, Si: 0.26, Mn: 1.50, P: 0.002, S: 0.003, Als: 0.017, Nb: 0.038, Ti: 0.010, others are Fe and residual elements.
[0025] Analysis of mechanical properties
[0026] Composition and mechanical properties are implemented according to ASTM A370, and the mechanical properties are shown in the following table 1
[0027] Table 1 Mechanical and mechanical properties of hot-rolled structural steel ST52 plate with a thickness of 15-60mm
[0028]
[0029] The trial production of 15-60mm thick hot-rolled structural steel ST52 medium and heavy plates totaled 40 batches, of which: the yield strength was controlled at 3...
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