Heat treatment method for improving obdurability of Fe13Cr4NiMo ultra-low carbon martensitic stainless steel

• Main Authors: ZHANG JIAHAO, YAN QINGZHI, XU XUEFEI, YU ZUOCHANG, TIAN TAO, YUAN CHAOLIAN, WANG YU, ZHANG XIAOXIN, JIANG LATAO
• Format: Patent
• Language: Chinese; English
• Published: 05.09.2023
• 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; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention belongs to the technical field of metal heat treatment, and particularly relates to a heat treatment method for improving the obdurability of Fe13Cr4NiMo ultra-low carbon martensitic stainless steel. The method comprises the following steps: (1) preparing Fe13Cr4NiMo martensitic stainless steel; (2) the Fe13Cr4NiMo martensite stainless steel is subjected to austenitizing treatment and quenching, and austenite is converted into martensite; wherein the temperature of the austenitizing treatment ranges from 850 DEG C to 1050 DEG C; and (3) tempering the material obtained in the step (2) at 600-750 DEG C, preserving heat, and cooling along with the furnace. According to the heat treatment method provided by the invention, the obdurability material can be obtained only through one-time quenching and one-time tempering, and compared with the prior art, the process is simplified, the process production cost and the operation difficulty are reduced, and good comprehensive performance such as obdurabilit