Budget Amount *help |
¥18,590,000 (Direct Cost: ¥14,300,000、Indirect Cost: ¥4,290,000)
Fiscal Year 2010: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2009: ¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000)
Fiscal Year 2008: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
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Research Abstract |
For application to diesel engine common rail enduring ultra high-pressure of 3000 bar, 0.2-0.4%C-1.5%Si-1.5%Mn-0.05%Nb-Cr-Mo-Ni-B TRIP-aided bainitic ferrite steels (TBF steels) and TRIP-aided martensitic steels (TM steels) were developed. In addition, the followings were proposed to achieve high combination of strength and toughness and high notch-fatigue strength. (1) optimum chemical composition for the TBF and TM steels. (2) ultra-fine graining by hot-forging and consequent austempering or isothermal transformationholding (3) optimum ratio (BF/M) of bainitic ferrite and martensite and carbon-enrichment mechanism
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