高 Ni 13Cr 鋳鋼再現熱影響部の切欠靭性 : 13Cr 鋳鋼の溶接性(第 5 報)

概要

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The relation of the notch toughness of weld heat affected zone of 13Cr cast steel with 2 to 6% of nickel added for the improvement of weldability and weld heat cycle was examined by means of a weld heat cycle simulating method and the following results were obtained : (1) The impact value (_<2u>E_0) was the highest in 2Ni when peak temperature in heat cycle was less than Ac_1 point and the lowest in 6Ni. Between Ac_1 and Ac_3 points in 2Ni and 4Ni impact value drop was great but slight in 6Ni. (2) Temper embrittlement was not recognized in the region of 600 to 650℃ as seen in low Ni-13Cr cast steel. (3) In 2Ni and 4Ni, the influence of temperature of a weld before commencement of postheating was large and when less than the vicinity of Mf point, the impact value would be remarkably improved due to postheating (more than 600℃). However, the value was little changed in 6Ni.
社団法人溶接学会の論文
1980-07-05