γ' 析出強化型 Ni 基鋳造合金の液相インサート拡散溶接部の γ' の析出に及ぼす 2,3 の因子 : γ' 析出強化型 Ni 基鋳造合金の拡散溶接に関する研究(第 1 報)

概要

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It is considered that precipitation of γ' in welds plays a predominant role in properties of welds. So the effect of wlding and heat treatment conditions on precipitation of γ' in liquid phase diffusion weld was investigated. Liquid phase diffusion welding was carried out by using insert metal, following by subsequent heat treatment in order to promote homogenization in composition. Nickel-base superalloys used are TM-49 and MarM-247. The following results were obtained. 1. Only intragranular γ' forms in welds. Eutectic γ' which is in base metal does not form in weld. 2. Volume and particle size of γ' in welds made with insert metal that Al, Ti and Hf are added to are close to that in base metal. 3. Volume and particle size of γ' in welds made with insert metal that Al, Ti and Hf are excluded from increase to that in base metal with the rise of temperature and time of diffusion treatment.
社団法人溶接学会の論文
1982-01-05