Niobium-containing double-phase stainless twisted steel and manufacturing method thereof

• Main Authors: KIM GIL-NAM, LU CHUNCHUN, JI DENGPING, DING HE, ZHU YANGJUN
• Format: Patent
• Language: Chinese; English
• Published: 18.11.2022
• 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 the technical field of metal materials, in particular to niobium-containing double-phase stainless twisted steel and a manufacturing method thereof.A proper amount of Nb is added into S32304 double-phase stainless steel, a 180mm square billet is produced through EAF furnace smelting, AOD furnace smelting, LF furnace smelting and continuous casting, the continuous casting billet is subjected to heat treatment, and the twisted steel is rolled through a continuous rolling machine. By means of the method, the yield strength of the rolled deformed steel bar can be improved, the number of rolling procedures is reduced, the production efficiency is improved, and the cost consumed by adjusting the rolling process technology is reduced. 本发明涉及金属材料技术领域，尤其是一种含铌双相不锈螺纹钢筋及其制造方法，通过在S32304双相不锈钢中加入适量的Nb，在通过EAF炉冶炼、AOD炉冶炼、LF炉冶炼、连铸生产180mm方坯、对连铸坯热处理、采用连轧机轧制螺纹钢筋的工艺，轧制出既定屈服强度的双相不锈螺纹钢产品，通过本发明可以实现提高轧制成螺纹钢后的屈服强度，减少轧制工序，提高生产效率，降低由于调整轧制过程工艺所消耗的成本。