METHOD FOR PRODUCING NICKEL-BASED ALLOY HIGH TEMPERATURE MATERIAL

• Main Authors: IMANO Shinya, OTA Atsuo
• Format: Patent
• Language: English; French; German
• Published: 25.09.2019
• Subjects: ALLOYS; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; FORGE FURNACES; FORGING; HAMMERING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METALLURGY; PERFORMING OPERATIONS; PRESSING METAL; PUNCHING METAL; RIVETING; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

This method for manufacturing a high-temperature component formed of a Ni-based alloy includes a step of subjecting a workpiece of the Ni-based alloy to hot die forging using predetermined dies to form a forge-molded article, the step including: a die/workpiece co-heating substep of heating the workpiece interposed between the dies to a forging temperature; and a hot forging substep of taking out the workpiece and the dies into a room temperature environment and immediately performing hot forging on the workpiece using a press machine. The predetermined dies are formed of another Ni-based superalloy comprising γ and γ' phases, and have features in that: a solvus temperature of the γ' phase is 1050-1250°C; and the γ' phase precipitates at least 10 vol.% at 1050°C and has two kinds of forms of intra-grain γ' phase precipitations within the γ phase grains and inter-grain γ' phase precipitations between/among the γ phase grains.