Mn-Ni ultralow-temperature steel and preparation method thereof

• Main Authors: CHEN YANTANG, ZHOU YUWEI, XU XUDONG, LI DONGHUI, HU ZHIYONG
• Format: Patent
• Language: Chinese; English
• Published: 31.03.2023
• 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; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PERFORMING OPERATIONS; PUNCHING METAL; ROLLING OF METAL; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses Mn-Ni series ultralow temperature steel and a preparation method thereof. Belongs to the field of low-temperature steel manufacturing and comprises the following chemical components: C, Si, Mn, P, S, Cr, Ni, Cu, Mo, Nb, N and the balance of Fe and inevitable impurities. The method comprises the following specific operation steps: 1, converter smelting; 2, rolling; and 3, laminar cooling after finish rolling. The Mn-Ni series ultralow temperature steel provided by the invention has the advantages of short production flow, easy control of the smelting process, simple and easy control of rolling operation, high automation degree, realization of intelligent control, reduction of human subjective factor intervention, stable performance of the manufactured low temperature steel, and good reproducibility; mn is used for replacing part of expensive alloy element Ni, and the raw material cost is low. The quenching and tempering procedures of traditional 5Ni steel are omitted, the production pro