HEAT TREATMENT METHOD FOR DIFFUSION BONDED NICKEL-BASED SUPER ALLOY AND HEAT EXCHANGER FOR VERY HIGH TEMPERATURE GAS-COOLED REACTOR

摘要

The present invention relates to a nickel-base superalloy alloy for heat-treating a diffusion bonded body of a nickel-base superalloy alloy to solidify deposits on a bonded surface and move the grain boundaries, wherein the nickel-base superalloy has 20.5 to 23.0% by weight of chromium (Cr) (Ni), 0.05 to 0.15 wt.% Of carbon (C), and the balance of nickel (Ni) and tin (W) Wherein the heat treatment comprises heating the diffusion bonded body to a temperature between 1100C and 1200C under vacuum conditions, holding the temperature at 1100C to 1200C for 30 minutes to 2 hours, To 30 0 C, to a heat treatment method of diffusion-bonded nickel-base superalloy.;