| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
|
|---|
| Outline of Final Research Achievements |
A new plasma nitriding technology using dc and RF glow discharge were performed in order to increase the surface hardness in the slit of tool steels. The following conclusions were drawn.
1. In dc and RF glow discharge plasma, Diffusion-based nitriding can be attained by controlling the sample potential, that ultimately maintain neutral particles. 2. RF plasma nitriding of the tool steel were obtained a surface hardness of more than two times that of the untreated sample in high vacuum atmosphere (0.6 Pa). 3. The nitriding speed of new dc glow discharge plasma process is 20% faster than that of conventional glow discharge plasma. 4. The inner sample surface with a gap of 1mm can be hardened by new plasma nitriding. The results obtained were as-finished mirror finish with deep diffusion layer and a hardness of more than two times that of the untreated sample with narrow gap.
|
