700MPa-grade wear-corrosion-resistant steel and manufacturing method thereof

• Main Authors: SUN AO, WANG JIE, LI QINGXIAN, LI JIANGWEI, YAN PINGYUAN, GUO XIAOHONG, SUN SHAOGUANG, LIU ZHIWEI, ZHANG RUIQI, ZHANG JIFU
• Format: Patent
• Language: Chinese; English
• Published: 12.07.2022
• 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 provides 700MPa-grade wear-corrosion-resistant steel and a manufacturing method thereof. The 700MPa-grade wear-corrosion-resistant steel comprises the following chemical components in percentage by weight: 0.069%-0.090% of C, 0.65%-0.93% of Si, 1.18%-1.59% of Mn, less than or equal to 0.018% of P, less than or equal to 0.006% of S, 0.91%-1.48% of Cr, 0.14%-0.24% of Cu, 0.055%-0.091% of Sb, 0.45%-0.65% of W, 0.071%-0.096% of Ti, 0.015%-0.045% of Als, less than or equal to 0.004% of N and the balance of Fe and inevitable impurities. The steel plate provided by the invention has good corrosion resistance, wear resistance and excellent formability, and is suitable for manufacturing lightweight containers. 本发明提供了一种700MPa级耐磨损腐蚀钢及其制造方法，钢中化学成分按重量百分比计为：C 0.069％～0.090％、Si 0.65％～0.93％、Mn 1.18％～1.59％、P≤0.018％、S≤0.006％、Cr 0.91％～1.48％、Cu 0.14％～0.24％、Sb 0.055％～0.091％、W 0.45％～0.65％、Ti 0.071％～0.096％、Als 0.015％～0.045％、N≤0.004％，余量为Fe以及不可避免的杂质。本发明的钢板具有良好的耐腐蚀性能、耐磨损性能及优异的成型性能，适合于轻量化集装箱的制造。