High-alloy heat-resistant steel plate and heat treatment method thereof

• Main Authors: GU ZIYOU, WU YANYANG, ZHAO ZIJUAN, LI YANGBING, YUE XINXIN, YIN WEIJIANG, LIU FUFANG, LIU SHENG, LONG JIE, NIU HONGXING, YUAN JINCHENG, CHEN QI, PANG HUIYONG, HOU JINGCHAO
• Format: Patent
• Language: Chinese; English
• Published: 15.09.2023
• 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 high-alloy heat-resistant steel plate and a heat treatment method thereof. The high-alloy heat-resistant steel plate comprises the following chemical components in percentage by mass: 0.085-0.17% of C, 0.20-0.60% of Si, 8-12% of Cr, 0.8-1.2% of Mo, 0.15-0.35% of V, 0.05-0.20% of Nb, 0.060-0.085% of N, and N/Al greater than or equal to 4.0. The heat treatment process of the steel plate is completed through cooperation of an efficient trolley furnace and a quenching machine, and the heat treatment process comprises quenching and tempering. The high-alloy heat-resistant steel plate provided by the invention meets the requirements of materials with hydrogen corrosion resistance, high heat resistance and good low temper brittleness in the domestic petrochemical industry and thermal power plants, and is widely applied to design and manufacturing of key pipe fitting parts of pressure vessels and power station boilers. 本发明公开了一种高合金耐热钢板及其热处理方法，所述高合金耐热钢板的化学成分及质量百分含量为：C 0.085～0.17%，Si 0.20～0.60%