熔着鋼の二重衝撃試驗

概要

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Double blow impact tests were performed on V-noched Charpy specimens of deposited steels at temperatures, -70℃ to 80℃, to divide the total energy absorbed by the standard impact test (W_c) into the energy for crack initiation (W_i) and the one for crack propagation (W_D). Two ilmenite type electrodes (No. 1 and No. 4) and a low hydrogen type one (No. 9A) were used for the tests. The same experimental procedure for the rolled steel plate was adopted as previously mentioned in the author's report. The Figs. 2∿4 show the test results. From these figures, both the W_i∿and the W_p∿temperature curves were determined (Figs. 5∿7). The W_i curve of No. 9A was much higher in its maximum value and located at exceedingly lower temperature side than no. 1; on the other hand, W_p curves of both deposits showed no remarkable difference. By No. 4 deposit, less deoxidized than No. 1,either curve of W_i and W_p was located at higher temperature side than No. 1. Those characteristics of energy curves were discussed in relation to the transition temperatures of welded joints investigated by the author.
社団法人溶接学会の論文
1955-11-10