Marine atmosphere corrosion resistant high-strength steel and production method thereof

• Main Authors: CUI LEI, CHEN YONG, LANG FENGJUN, CHENG PENG, LI JIANGWEN, ZHOU QINGJUN, PANG TAO, MA YING
• Format: Patent
• Language: Chinese; English
• Published: 16.08.2022
• 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 belongs to the technical field of atmospheric corrosion resistant steel and discloses marine atmospheric corrosion resistant high-strength steel and a production method thereof, and the marine atmospheric corrosion resistant high-strength steel comprises the following components in percentage by mass: 0.03%-0.05% of C, 0.6%-0.8% of Si, 1.4%-1.7% of Mn, 0.3%-0.6% of Cu, 0.3%-0.6% of Mo, 0.2%-0.3% of Sb, 0.003%-0.005% of Mg, 0.05%-0.08% of Ti, 0.1%-0.2% of P, less than or equal to 0.003% of S and the balance of Fe and inevitable impurities. According to the invention, expensive elements such as Ni, Cr and the like are not added, through the synergistic effect of alloy elements such as Mo, P, Sb and the like, micro-magnesium treatment is combined with titanium micro-alloying, and a controlled rolling and controlled cooling process is matched, so that the marine atmosphere corrosion resistant steel with high strength, low yield ratio and excellent toughness is finally obtained. 本发明属于耐大气腐蚀钢技术领域，公开了一种