High-strength high-toughness low-carbon low-alloy steel with brick structure and preparation method of high-strength high-toughness low-carbon low-alloy steel

• Main Authors: CHENG XINGWANG, ZHANG HANCHI, QIU XUYANGFAN, WANG YINGCHUN, GAO CHONG, YANG BIN
• Format: Patent
• Language: Chinese; English
• Published: 14.10.2022
• 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 relates to high-strength high-toughness low-carbon low-alloy steel with a brick structure and a preparation method of the high-strength high-toughness low-carbon low-alloy steel, and belongs to the technical field of metal materials. The low-carbon and low-alloy steel is arranged from 1t; 111gt, 111gt; and lt; 100 gt; and the two textures are alternately arranged to form a brick structure. According to the method, the low-carbon low-alloy steel part is subjected to complete austenitizing, tempering, warm rolling and annealing treatment, grains are effectively refined, fine carbide precipitation is promoted, then a brick structure is formed in the low-carbon low-alloy steel part, the strength is greatly improved, meanwhile, the toughness of the low-carbon low-alloy steel part is remarkably improved, and excellent obdurability matching is achieved. 本发明涉及一种具有砖砌结构的高强高韧低碳低合金钢及其制备方法，属于金属材料技术领域。所述低碳低合金钢由 和 两种织构交替排列形成砖砌结构。所述方法通过对低碳低合金钢件进行完全奥氏体化、回火、温轧和退火处理，有效细化晶粒，促进细小碳化物析出，进而在低碳低合金钢的内部形成砖砌结构，在大幅提高强度的同时其韧