高温水中におけるNb添加によるAlloy 600の応力腐食割れ抵抗性の改良(<小特集>腐食防食小特集)

概要

論文の詳細を見る
The effect of niobium as a stabilizing element and the effect of thermal cycles on welding of the corrosion resistance of 75%Ni-15%Cr (Alloy 600) were investigated. The results are summarized as follows: (1)The effects of weld thermal cycle and sensitizing heat treatment on the intergranular corrosion (IGC) and intergranular stress corrosion cracking (IGSCC) of Alloy 600 containing carbon more than 0.01 wt% can be explained by the behavior of chromium carbide precipitation at the grain boundaries. (2)In Alloy 600 containing carbon more than 0.01 wt%, a suitable addition of niobium (Nb/C ≳ 30) prevents degradation of corrosion resistance due to the sensitization caused by the chromium carbide precipitation.
社団法人日本材料学会の論文
1988-01-15