水車ケーシングの水圧試験による遅れ割れ防止に関する検討

概要

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With the demand for the increasingly large capacity of machines and equipment, structural dimensions are growing large, and design stress is becoming higher eventually. This naturally necessitates the use of high-strength steel possessing high tensile and high toughness. Although mild steel is generally adopted for welded structures, it needs an exceedingly large gauge to give sufficient strength and involves difficulites in building up welded structures. The specimens adopted in this research were multilayer welded joints of 80kg/(mm)^2 high-strength steel welded by submerged arc welding or manual arc welding. Under the practical welding process, the relationship between the restraint stress that acts in the rectangular direction of welds and the crack was sought, and critical restraining stress for crack initiation was obtained. Similar experiments were conducted with smaller specimens as well.
社団法人溶接学会の論文
1977-09-05