MANUFACTURING METHOD OF STEEL COMPONENT

• Main Authors: FUNAKAWA YOSHIMASA, KIMURA HIDEYUKI, KOJIMA MAYUMI, KIDO AKIMASA, SAKURAI YASUHIRO
• Format: Patent
• Language: English; Japanese
• Published: 22.08.2023
• 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

To provide a steel component excellent in wear resistance.SOLUTION: A steel slab having a predetermined component composition is subjected to heating, hot rolling, coiling, first annealing, second annealing, cold rolling, machining, and heat treatment under a predetermined condition so that the average grain size of the former austenite grains is 25 μm or less, having a carbide containing at least one of Nb, Ti, and V, and the average grain size of the particles of the carbide of 0.1 μm or more is 0.15-2.5 μm, and the average grain size of the particles of the carbide of less than 0.1 μm is 0.005-0.05 μm.SELECTED DRAWING: Figure 1 【課題】耐摩耗性に優れた鋼製部品を提供する。【解決手段】所定の成分組成を有する鋼スラブに対して、加熱、熱延、巻取、第１の焼鈍、第２の焼鈍、冷間圧延、加工、および熱処理を所定の条件で施すことにより、旧オーステナイト粒の平均粒径が２５μｍ以下であり、Ｎｂ、Ｔｉ、Ｖの少なくとも１つを含む炭化物を含み、かつ、前記炭化物のうちの粒径が０．１μｍ以上の粒子の平均粒径が０．１５～２．５μｍ、前記炭化物のうちの粒径が０．１μｍ未満の粒子の平均粒径が０．００５～０．０５μｍである鋼製部品とする。【選択図】図１