軟鋼熔接部の活性化エネルギーについて(第 2 報)

概要

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In the preceding papers one of the authors stated that nitrogen in the weld metal would have a noticeable effect of disturbing the systems of weld metals and that the cooling speed had little effect on the activation energy for stressrelief in the case of hand-welding. This time the authors used the unionmelt weld metals as the specimens observing the activation energies to prevent the personal errors in welding from influencing the state of weld metals, and to keep the welding conditions constant. As a result of testing they reached the following conclusions : 1) Mn has little effect on the activation energies for stress-relief. 2) C, Si and P etc., have great influences, i.e., they increase the activation energies of weld metals and tend to greatly disturb the ferrite structure system in weld metals.
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