HIGH STRENGTH, HIGH-TEMPERATURE CORROSION RESISTANT MARTENSITIC STAINLESS STEEL AND MANUFACTURING METHOD THEREFOR

• Main Authors: LIU, Qilin, LUO, Meng, ZHAO, Jimei, QI, Yameng, ZHAO, Peng, ZHANG, Chunxia, CAI, Haiyan, ZHANG, Zhonghua
• Format: Patent
• Language: Chinese; English; French
• Published: 04.11.2021
• 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

Disclosed is a high strength, high-temperature corrosion resistant martensitic stainless steel, characterized by comprising the following chemical elements in percentages by mass: 0＜C≤0.05%, 0.1-0.2% of Si, 0.20-1.0% of Mn, 11.0-14.0% of Cr, 4.0-6.0% of Ni, 1.5-2.5% of Mo, 0.001%-0.10% of N, 0.03-0.2% of V, 0.01-0.1% of Nb, 0.01-0.04% of Al, and the balance being Fe and inevitable impurities. In addition, also disclosed are an oil sleeve pipe prepared by means of the above-mentioned high strength, high-temperature corrosion resistant martensitic stainless steel, and a method for manufacturing the oil sleeve pipe. The high strength, high-temperature corrosion resistant martensitic stainless steel of the present invention has an excellent high temperature corrosion resistance to carbon dioxide and chloride ions, as well as an excellent low-temperature impact toughness and high-temperature strength attenuation resistance. L'invention concerne un acier inoxydable martensitique résistant à la corrosion à haute tem