FORGING MATERIAL, FORGING COMPONENT AND METHOD FOR PRODUCTION OF FORGING COMPONENT

• Main Authors: KADA OSAMU, NARUMIYA HIROKI, SUZUKI ATSUSHI
• Format: Patent
• Language: English; Japanese
• Published: 07.10.2021
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; FORGE FURNACES; FORGING; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; HAMMERING; 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; PRESSING METAL; PUNCHING METAL; RIVETING; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

To provide a forging material and forging component having excellent forgeability and capable of exerting superior wear resistance after the forging process and carburized quenching/tempering treatment, and to provide a method for production of the forging component.SOLUTION: A forging material in one embodiment of this invention is the material by lateral extrusion and comprises outside and inside steel materials having a prescribed chemical composition. In the place at which the forging material is laterally extruded, the areas S1 and S2 of the outside and inside steel materials in a face perpendicular to the axial direction of the forging material satisfy 0.90≥S2/(S1+S2). In the deformation resistance obtained at a strain rate 10 s-1 in an edge face binding compression test, the deformation resistances σ'1 and σ'2 of the outside and inside steel materials in an equivalent plastic strain of 1.5 satisfy σ'1×S1/(S1+S2)+σ'2×S2/(S1+S2)≤750[MPa].SELECTED DRAWING: Figure 1 【課題】優れた鍛造性を有し、鍛造加工及び浸炭焼入焼戻し処理後に優れた耐摩耗性を発揮可能な鍛造用材料及び鍛造部材、並びにこの鍛造部材の製造方法を提供する。【解決手段】本発明の一態様に係る鍛造用材料は、側方押出しによる鍛造用材料であって、所定の化学成分を有する外側鋼材と内側鋼材とを備え、鍛造用材料が、側方押出しされる箇所において、鍛造用材料の軸方向と垂直な面における外側鋼材の面積Ｓ１と内側鋼材の面積Ｓ２とが０．９０≧Ｓ２／（Ｓ１＋Ｓ２）を満たし、端面拘束圧縮試験にてひずみ速度１０ｓ−１で得られた変形抵抗で、相当塑性ひずみ１．５における外側鋼材の変形抵抗σ'１と内側鋼材の変形抵抗σ'２とが、σ'１×Ｓ１／（Ｓ１＋Ｓ２）＋σ'２×Ｓ２／（Ｓ１＋Ｓ２）≦７５０［ＭＰａ］を満たす。【選択図】図１