Normalizing type large-thickness-structure steel plate and production method thereof

• Main Authors: YIN WEIJIANG, QU ZHENG, LONG JIE, LI JIE, YUAN JINCHENG, WANG TIANTIAN, DING WENKE
• Format: Patent
• Language: Chinese; English
• Published: 11.01.2019
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a normalizing type large-thickness-structure steel plate and a production method thereof. The normalizing type large-thickness-structure steel plate comprises the following chemical components of, by mass, 0.15-0.18% of C, 1.10-1.30% of Mn, less than or equal to 0.015% of P, less than or equal to 0.003% of S, less than or equal to 0.055% of Cu, less than or equal to 0.012%of N, and balance Fe and inevitable impurities. The production method comprises the following working procedures of steelmaking, continuous casting, heating, rolling and normalizing heat treatment. According to the normalizing type large-thickness-structure steel plate and the production method thereof, enforcing by carbon and manganese is used as a basic condition, reasonable component design andsteelmaking process control are achieved, and the proper normalizing heat treatment process is adopted for cooperation, so that in the case of the performance of the 1/4 position of the plate thickness of the produced normali