| 摘要 |
<p>The present invention relates to a method of thermomechanically processing a heat-resistant alloy having an excellent ultra-high-temperature mechanical property; and an alloy by the same. A method of thermomechanically processing a heat-resistant alloy after heat-treating the heat-resistant alloy enables a shape of a grain boundary of the heat-resistant alloy to be formed in serration by a heat treatment step wherein the heat-resistant alloy is solution-heat-treated, slowly cooled for aging heat treatment, aging-heat-treated, and air-cooled, changes the shape of the grain boundary in the serration shape while maintaining a basic property of the nickel-base heat-resistant alloy to induce extraction of stable carbide having low interface energy and improve a coupling force between the grain boundary and the base, and cold-works in the amount within a 5-10% range to adopt dislocation inside the grain by a post mechanical processing method, such that fine carbide extraction inside the grain is induced during the use to suppress damages from being concentrated to the grain boundary, thereby improving resistance with respect to grain boundary crack such as creep, fatigue, oxidation, and corrosion even under an ultra high temperature equal to or higher than 950°C.</p> |
