めっき浴浸漬時に生じる平板およびパイプの熱応力 : 溶融亜鉛めっき時における溶接継手の液体金属ぜい化(第2報)

概要

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In previous report, the effect of welding factors on the critical stress for LME-cracking of steel was examined. In addition, because of preventing the crack, it is necessary to study the behavior of thermal stress and residual stress during dipping in the molten zinc that cause the crack in steel structure. In this report, the distribution of temperature and thermal stress during dipping simple plate and pipe in the molten zinc were analyzed. The results are as follows.(1) Maximum tensile thermal stress, (σ_t)_<max> occurred at the lower side of plate and pipe, and caused LME-cracking at this position.(2)(σ_t)_<max> increased as plate width is large and plate thickness is small. And (σ_t)_<max> increased as pipe diameter is large.(3) For the plate and pipe, (σ_t)_<max> increased as dipping velocity is small.
1985-05-05