High-manganese low-nickel austenitic heat-resistant steel and application thereof

• Main Authors: WANG YINJIE, ZONG LOU, GONG GAOQUAN, GU JINLIN
• Format: Patent
• Language: Chinese; English
• Published: 26.01.2024
• Subjects: ALLOYS; BLASTING; CHEMISTRY; ENGINE PLANTS IN GENERAL; FERROUS OR NON-FERROUS ALLOYS; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; METALLURGY; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; STEAM ENGINES; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WEAPONS

The invention belongs to the field of austenitic heat-resistant steel material metallurgy, and relates to high-manganese low-nickel austenitic heat-resistant steel and application thereof. The high-manganese low-nickel austenitic heat-resistant steel comprises the following components in percentage by mass: 0.35 to 0.5 percent of C, 0.8 to 2.0 percent of Si, 19 to 21 percent of Mn, 24 to 27 percent of Cr, 0.01 to 2 percent of Ni, 0.001 to 0.04 percent of P, less than or equal to 0.04 percent of S, 0.3 to 0.4 percent of N and the balance of iron and other inevitable impurity elements. The method has the beneficial effects that about 10% of Ni is replaced with Mn and N, the cost of raw materials is reduced, by controlling the adding amount of C, the defect of precipitated nitrogen holes is eliminated, and by controlling the equivalent weight of nickel, a proper free-cutting phase is generated, so that the machining cost of castings is reduced. 本发明属于奥氏体耐热钢材料冶金领域，涉及一种高锰低镍奥氏体耐热钢及其应用。该高锰低镍奥氏体耐热钢，包括以下质量百分比的各组分：C：0.3