METHOD FOR MANUFACTURING HOT FORGING MATERIAL

• Main Authors: HIROZAWA HIROSHI, IWASA NAOYUKI, KOBAYASHI KOHEI, FUJITA ETSUO
• Format: Patent
• Language: English; Japanese
• Published: 14.06.2018
• Subjects: FORGE FURNACES; FORGING; HAMMERING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PRESSING METAL; PUNCHING METAL; RIVETING; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a method for manufacturing a hot forging material by which a forging raw material taken out from a heating furnace can be loaded on a forging device in a relatively short time, and temperature drop of the forging raw material can be suppressed.SOLUTION: A method for manufacturing a hot forging material includes: a coating process in which a raw material for forging is coated with a coating layer which is formed in such a manner that a ceramic layer and a glass lubrication layer are so coated as to sequentially laminated; a heating process in which the raw material for forging is heated to a hot forging temperature; and a hot forging process in which the heated raw material for forging is hot-forged thereby forming a hot forging material. A thickness of the ceramic layer is less than 200 μm, and a relational expression of glass lubrication layer thickness≥ceramic layer thickness is satisfied.SELECTED DRAWING: Figure 2 【課題】 加熱炉から取り出した鍛造素材を比較的短時間で鍛造装置に載置可能で、且つ、鍛造素材の温度低下を抑制することが可能な熱間鍛造材の製造方法を提供する。【解決手段】 被鍛造素材表面に、セラミック層とガラス潤滑層とを順次積層するように被覆して被覆層を形成した鍛造用素材とする被覆工程と、前記鍛造用素材を熱間鍛造温度に加熱する加熱工程と、前記加熱した鍛造用素材を熱間鍛造して熱間鍛造材とする熱間鍛造工程と、を含み、前記セラミック層の厚さが２００μｍ未満であり、且つガラス潤滑層厚さ≧セラミック層厚さの関係を満足する熱間鍛造材の製造方法。【選択図】 図２