オーステナイト系ステンレス鋼の高品質・高速度摩擦攪拌接合(溶接・接合)

概要

論文の詳細を見る
Although several studies on the friction stir welding of high temperature materials have recently been reported, their practical use has not yet occurred due to some problems to be solved such as decreases in the corrosion resistance and joint efficiency during a high-speed joining. In this study, the effect of the welding speed on the joint efficiency was investigated in detail. As a result, it has been clarified that at a rotational speed of 600rpm, the friction stir welding of 304 austenitic stainless steel is possible up to the joining speed of 1200mm/min, and the tensile strength of the joint exceeds that of the parent material up to the joining speed of 1150mm/min. In addition, the corrosion resistance is significantly improved at the higher welding speeds. No rust was observed during the salt spray testing of the 1000mm/min joint. Thus, an increase in the welding speed can improve productivity and the product quality by decreasing corroded region. These results are expected to extend to an actual application to products by further improving the technology.
社団法人日本鉄鋼協会の論文
2008-11-01