| 摘要 |
PURPOSE:To provide the titled ultra-high heat resistant alloy having high creep breaking strength and excellent in oxidation resistance, prepared by a vacuum degassing melting method and constituted of a specific composition consisting of C, Si, Mn, Cr, Ni, W, Al and Fe. CONSTITUTION:An ultra-high heat resistant alloy is prepared in a high purified degree by degassing melting under a vacuum degree of 5.0mm.Hg or less and has excellent room temp. drawing characteristics and consists of 0.3-0.6% C, 1.0% or less Si, 1.0% or less Mn, 25-35% Cr, 40-60% Ni, 8-15% W, 0.2-0.4% Al and the remainder Fe and usual impurities. This ultra-high heat resistant alloy is high in creep breaking strength at an ultra-high temp. of about 1,200 deg.C or more and has excellent oxidation resistance. The above mentioned ultra-high heat resistance alloy excellent in the above mentioned various characteristics is optimum as the material of an ultra-high temp. heat resistant cast steel product such as a heat treatment jig, for example, the hardening roll or tray of stainless steel.
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