HIGH-STRENGTH CORROSION-RESISTANT ANTI-CRACKING STEEL, AND PREPARATION METHOD THEREFOR AND USE THEREOF

• Main Authors: LUO, Xing, LIU, Tianlong, HE, Jiazhen, YIN, Fuxing, FAN, Kuanyuan, ZHENG, Kaihong, LUO, Zhichao
• Format: Patent
• Language: Chinese; English; French
• Published: 04.07.2024
• Subjects: ALLOYS; BLASTING; CHEMISTRY; DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING; ENGINEERING ELEMENTS AND UNITS; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MECHANICAL ENGINEERING; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; THERMAL INSULATION IN GENERAL; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WEAPONS

A high-strength corrosion-resistant anti-cracking steel, and a preparation method therefor and the use thereof, which relate to the technical field of metal materials. The crystal grains of the steel comprise austenite and ferrite, and the crystal grains have a slender fiber shape. The high-strength corrosion-resistant anti-cracking steel comprises the following elements in percentages by weight: C: 0.01-0.1%, Cr: 18-32%, Ni: 3-10%, Mo: 0.2-5.0%, Mn: 0.1-2.0%, Si: 0.2-1.0%, N: 0.1-0.3%, S≤0.03%, P≤0.03%, and the balance of Fe and inevitable impurities. The corrosion resistance of a material is improved by controlling the element composition of the steel, especially the ratio of C, N and Si. The slender fibrous structure grains in the material have good impact toughness, such that the mechanical properties of fatigue fracture performance, etc., of the material can be significantly improved, thereby prolonging the service life of the high-strength corrosion-resistant anti-cracking steel. L'invention concerne un