号数ばね論文集50号(2005年)
ページ数pp.17-22
種類論文
論文名ショットピ−ニング残留応力測定における2θ−sin2ψ線図のψスプリットに及ぼす化学成分の影響
TitleEffect of Chemical Composition toψsplitting in 2θ‐sinψ2 Diagram on Residual Stress Measurement of Shot Peening material
著者榊原隆之1) 尾形直樹2) 佐藤嘉洋2)
AuthorTakayuki SAKAKIBARA 1) Naoki OGATA 2) Yoshihiro SATO 2)
抄録
Abstract"High durability is required for automotive engine valve springs. To ensure the performance of springs, it is necessary to evaluate and measure the residual stress distribution on surface and inner direction of the spring. Theoretically, it is used to be treated that the residual stress of a shot-peened material surface is uniform. However, the shape of a coil spring causes various peening angles corresponding to the surface location, so the uneven shot peening angles may leads to a non-uniform residual stress on the coil spring surface. On the other hand, an analysis method of non-liner 2θ-sin2ψdiagram (orψ-splitting analysis) is well known to directionally deformed material such as ground, planed or rolled materials. Recently, anψ-splitting analysis has been reported for the shot-peened materials. In this study, the residual stress distribution of slant shot-peened spring material was measured and,ψ- splitting (non-linear 2θ-sin2ψdiagram) was studied in the view of chemical compositions and microstructures. As a results, the extent ofψ-splitting was mainly affected by the distribution of carbide particles, not the kind of carbide particles itself."
著者の所属1)中央発條蝓。押紡膾綮堽大学
Belonging1)CHUO SPRING CO.,LTD. 2)OSAKA CITY UNIVERSITY
Key WordsSpring steel, Shot peening,ψ-splitting, Chemical composition