Development of Shotless Peening System and Manufacturing Considering Preservation of Environment

考虑环境保护的无喷丸喷丸系统和制造的开发

• 批准号: 13555022
• 负责人: SOYAMA Hitoshi
• 金额: $ 5.63万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13555022/
• 关键词: Surface Modification; Peening; Cavitation; Fatigue Strength; Residual Stress; Shot Peening; Surface Roughness; Jet; 回折X線; 半価幅; ステンレス鋼; 浸炭材料; 圧縮残留応力; ノズル; 衝撃力

1.The cavitating jet in air was successfully realized using cavitation shotless peening system without a water-filled chamber. It was revealed that the cavitating jet in air was most powerful compared with a cavitating jet in water and a normal water jet in air.2.The erosion test and measurement of cavitation intensity were carried out at various conditions to measure the ability of cavitating jet in air, then the optimum condition of the cavitating jet was obtained.3.Several steel were peened by the cavitating jet in air, the residual stress was measured by an X-ray diffraction method. The introduction of compressive residual stress was demonstrated. It shows the possibility of the surface modification by using the cavitating jet in air.4.The optimum peening time was obtained from the relation of the peening time and the residual stress or the fatigue test at constant load changing with the peening time.5.In order to compare the proposed shotless peening considering the prevention of environment and the conventional shot peening, a rotating bending fatigue test was carried out, and it was shown that the improvement of fatigue strength by shotless peening was better than that of shot peening.6.In order to establish non-destructive testing method to evaluate the surface modification layer peened by the shotless peening, the residual stress and austenitic ratio were measured by using an X-ray diffraction method.7.The improvement of fatigue strength of gear was demonstrated by a bending fatigue test of gear tooth comparing the result of shot peening.8.In order to apply the shotless peening to various materials, the relation between the cavitation intensity and the materials properties was investigated, and the fundamental threshold level of materials for the cavitation impact was revealed.

1.利用空化无喷丸喷丸系统，成功实现了空气中的空化射流，无需充水室。结果表明，与水中的空化射流和空气中的普通水射流相比，空气中的空化射流的威力最强。 2.在不同条件下进行冲蚀试验和空化强度测量，以测量空化射流的能力3.对几种钢材进行了空气中空化射流喷丸处理，采用X射线衍射法测定了残余应力。证明了压缩残余应力的引入。表明了利用空气中空化射流进行表面改性的可能性。4．根据喷丸时间与残余应力的关系或恒载荷疲劳试验随喷丸时间的变化，得出最佳喷丸时间。5．为了将考虑环境防护的无喷丸强化与传统喷丸强化进行比较，进行了旋转弯曲疲劳试验，结果表明无喷丸强化对疲劳强度的提高优于喷丸强化6。 .为了建立采用无损检测方法对无喷丸喷丸处理后的表面改性层进行评价，采用X射线衍射法测量残余应力和奥氏体比。7.通过弯曲疲劳试验证明齿轮疲劳强度的提高8.为了将无喷丸喷丸技术应用于各种材料，研究了空化强度与材料性能之间的关系，揭示了材料空化影响的基本阈值水平。

项目成果

K.Saito, (H.Soyama): "Improvement of Fatigue Strength of Mechanical Materials by a Cavitating Jet in Air"Proc. 38th JSME Meeting of Tohoku Branch. No.031-1. 58-59 (2003)

K.Saito，（H.Soyama）：“通过空气中的空化射流提高机械材料的疲劳强度”Proc。

H.Soyama: "Peen Forming of Duralumin Plate by Using a Cavitating Jet in Air"Proceedings of Fifth International Symposium on Cavitation. OS2-3-001(CDROM). 1-4 (2003)

H.Soyama：“利用空气中的空化射流对硬铝板进行喷丸成形”第五届国际空化研讨会论文集。

H.Soyama: "Measurement of Cavitation Intensity in Mercury"Proceedings of Fifth International Symposium on Cavitation. GS-11-010(CDROM). 1-5 (2003)

H.Soyama：“汞空化强度的测量”第五届国际空化研讨会论文集。

H.Soyama: "Relationship on Cavitation Shotless Peening between Residual Stress and Pressure Distribution of Cavitation Impact"Proc. Mechanical Engineering Congress, 2003 Japan. Vol.VI. 145-146 (2003)

H.Soyama：“空化无喷丸喷丸残余应力与空化冲击压力分布之间的关系”Proc。

H.Soyama: "Improvement of Fatigue Strength of Aluminum Alloy Casting by Cavitating Jet in the Air"Proc. 2002 Annual Meeting of JSME/MMD. No.02-05. 483-484 (2002)

H.Soyama：“通过空气中的空化射流提高铝合金铸件的疲劳强度”Proc。