| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
The rolling contact fatigue lives of the case-hardened steel became longer as the processing time of the cavitation peening became longer under a processing time of 30 minutes or shorter. In particular, the rolling contact fatigue lives of the case-hardened steel were improved to about 7 times by the cavitation peening with a processing time of 30 minutes. Moreover, a cavitation peening apparatus was newly built by using a plunger pump with a maximum injection pressure of 35 MPa. As a result, the processing capacity of the cavitation peening under an injection pressure of 35 MPa was triple of that under an injection pressure of 20 MPa.
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