九州大学 研究者情報
総説一覧
松田 和貴(まつだかずき) データ更新日:2024.06.03

准教授 /  工学研究院 海洋システム工学部門


総説, 論評, 解説, 書評, 報告書等
1. 児玉真二,富士本博紀,石田欽也,松田和貴,松葉正寛, シャシー部品用高強度鋼板のアーク溶接技術, 日本製鉄技報, 2019.04, [URL], Recent research progresses on fatigue strength and corrosion resistance of arc welded joint using high tensile strength steel sheets are described, focusing on automotive chassis members. At first, the impacts of weld metal hardness and weld bead shape on fatigue strength are studied, and the importance of the selection of welding wires and the optimization of welding conditions are indicated. Additionally, the effects of the shielding gas components on weld bead shapes or the arrangements of the stiffening beads to reduce stress concentrations are described. Secondly, the properties of electrodeposition coating on the weld part are evaluated in order to improve corrosion resistance. It is confirmed that the coating properties depend on the characteristics of peeling or coating on the weld slags, and the coating defects are varied according to the type of welding wire and steel plate. Finally, the shot blast treatment is proposed as a countermeasure for supporting corrosion resistance and fatigue strength..
2. 児玉真二,石田欽也,松田和貴,小川正裕, 自動車足回り用超高強度鋼板の溶接部の疲労強度向上, 新日鉄住金技報, 2017.12, [URL], Recent research progresses on fatigue strength of arc welded joint using high tensile strength steel sheets are described, focusing on automotive chassis members. At first, effects of the high strength welding wire on fatigue strength were examined by bending fatigue test. As the result, it was confirmed that increasing of welded metal strength associated by the high strength wire suppresses the crack in welded metal around the toe portion, and improves the fatigue strength of welded joint. Secondly, comparison of fatigue strength between fillet lap joints and butt joints were studied by tensile load fatigue test. The fatigue strength of butt joint increases twice as high compared with its of fillet lap joint, while fillet lap joint and half penetration butt joint on which the root portion cracks generated could not obtain the effects of high strength welding wire. Finally, welded joints with the stiffening bead were proposed as a countermeasure for improving fatigue strength including root portion, and its potential for the stress reduction and the increasing of fatigue strength was indicated..

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