Ni 基耐熱合金の溶接性に関する研究(第 2 報) : Inconel 713C におけるγ' 相の固溶析出挙動

概要

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In the previous paper, it was shown that the weld crack sensitivity of Inconel 713C mainly depended upon aluminum content; that is, according to the results of a bead-on-plate test, decreasing the aluminum content from 6% to 4.45% prevented weld cracking in this alloy. To clarify the influence of aluminum on the weld cracking, the solution and precipitation behavior of γ' phase [Ni_3(Al, Ti)] during rapid heating and cooling was investigated. The results obtained in this study are summarized as follows : (1) In the heat-affected zone of Inconel 713C, the region of γ' phase being considered to be solutioned, is recognized. This region becomes narrower with increasing aluminum content. (2) Transverse hardness on the bead of Inconel 713C becomes higher with increasing aluminum content. (3) γ' phase solution temeprature during rapid heating is elevated with increasing aluminum content. (4) γ' phase precipitation temperature during cooling after rapid heating becomes higher with increasing aluminum content, that is, the temperatures of 3.58,4.45 and 6% Al alloy are 1000,1060 and 1130℃, respectively.
社団法人溶接学会の論文
1967-12-25