13-06-2023 дата публикации
Номер: CN116254464A
Принадлежит:
The invention relates to a heat-resistant steel plate with the thickness larger than 120 mm. The heat-resistant steel plate comprises, by mass, 0.10%-0.20% of C, 0.20%-0.50% of Si, 0.40%-0.80% of Mn, smaller than or equal to 0.015% of P, smaller than or equal to 0.008% of S, 0.015%-0.040% of Alt, 1.85%-2.60% of Cr, 0.70%-1.30% of Mo, 0.10%-0.50% of Ni, smaller than or equal to 0.010% of Sb, smaller than or equal to 0.020% of Sn, smaller than or equal to 0.020% of As, smaller than or equal to 0.0001% of H and the balance Fe. O: < = 0.0015%; n is less than or equal to 0.0040%, and the balance is Fe and inevitable impurity elements. The manufacturing method of the steel plate comprises the steps of steelmaking, continuous casting, heating, controlled rolling, on-line quenching (DQ) and off-line tempering, a tempered sorbite structure is obtained, the thickness of the obtained steel plate ranges from 120 mm to 150 mm, the normal-temperature tensile yield strength is larger than or equal to ...
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