応力二段ショットピーニングに関する研究 : (残留応力分布に及ぼす負荷応力と投射角度の影響)

概要

論文の詳細を見る
The technique of shot peening is commonly used to increase fatigue limit. However, there are many difficulties in applying it to very high HV steel. To overcome these problems, the authors proposed stress double shot peening. This technique is applied to induction-heated steel (IH steel). The authors further investigated the effect of peening angle on residual stress distribution. The main results are as follows: (a) By double shot peening, residual stress distribution near the surface was markedly improved. (b) By stress double shot peening (δ_pre=1400MPa), very high compressive residual stresses (δ_max=-1972MPa and δ_s=-1774MPa) were successfully introduced in hard steel (HV≓700). (c) Peening angle has little effect on the δ_s. (d) δ_max increased with decreasing peening angles between 90 and 45 degree, and δ_max at 45 degree is the highest one, and it decreased with decreasing peening angle. (e) Depth of compressive residual zone (d_0) decreased with decreasing peening angle.
一般社団法人日本機械学会の論文
2000-08-25