溶接継手の腐食疲れ強さに及ぼす余盛りの影響

概要

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In this paper, the corrosion fatigue behaviors of as-welded specimens, welded and machined specimens under plane bending cantilever machine, and artificially notched specimens at the H. A. Z. of weld bead under rotary bending cantilever machine were investigated in the dripping of 3% salt water. Tested materials were mild steels, and welding procedures were performed by submerged arc welding. The relations between the strength reduction factor β_k due to the stress concentration factors of the reinforcement or the artificial notches, the factor β_c due to corrosion, and the factor β_<kc>, that by the gathering effects of corrosion with reinforcement or artificial notches, are discussed. The following conclusions may be drawn from these test results. (1) At the (10)^7 cycles, the corrosion fatigue strength under dripping salt water was reduced by 40∿50% than in air. (2) In the plane bending, the factor β_<kc> was nearly equal to β_k×β_c, but in the rotally bending, the factor β_<kc> was smaller than β_k×β_c. (3) In the corrosion fatigue test, the welded metals did not form the weak zone for the initiation of cracks so far as the surfaces were smoothly machined.
社団法人溶接学会の論文
1965-11-25