High-strength high-nitrogen iron-nickel-based corrosion-resistant alloy and preparation method thereof

• Main Authors: LANG YUPING, TU ZHENGPING, CHEN HAITAO, FENG HANQIU, WANG BAOSHUN, SUN WENQIANG, DING BINHUA, WANG MAN, ZHU XIONGMING, QU HUAPENG, WU MINGHUA
• Format: Patent
• Language: Chinese; English
• Published: 05.04.2024
• Subjects: ALLOYS; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL; 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; MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PERFORMING OPERATIONS; PUNCHING METAL; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a high-strength and high-nitrogen iron-nickel-based corrosion-resistant alloy and a preparation method thereof, belongs to the technical field of corrosion-resistant alloys, and solves the problem that an iron-nickel-based corrosion-resistant alloy in the prior art is difficult to meet the requirements of high strength and high corrosion resistance of an oil well pipe material. The high-strength high-nitrogen iron-nickel-based corrosion-resistant alloy comprises the following components in percentage by mass: less than or equal to 0.015% of C, 25.0% < Cr < = 27.0%, 28.5% < Ni < = 29.5%, 0.20% < N < = 0.45%, less than or equal to 1.0% of Mn, 2.0% < Mo < = 3.0%, 0.6% < Cu < = 1.0%, less than or equal to 1.0% of Si, less than or equal to 0.03% of P, less than or equal to 0.01% of S and the balance of Fe. And the balance of Fe and inevitable trace impurities. The high-strength high-nitrogen iron-nickel-based corrosion-resistant alloy has good tensile strength, yield strength, hardness and