| Budget Amount *help |
¥19,110,000 (Direct Cost: ¥14,700,000、Indirect Cost: ¥4,410,000)
Fiscal Year 2009: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2008: ¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000)
|
|---|
| Research Abstract |
As a new approach to control mechanical properties of steel sheets for press forming, the effectiveness of changing material strength continuously through sheet thickness direction was investigated. In this study, nitrogen concentration distribution was controlled for stainless steel to obtain 'strength-gradient steel sheets' with a maximum strength at the surface or in the center of the sheet, and then the mechanical properties of these specimens were evaluated. As a result, the bending strength was found to be varied depending on the strength-gradient even when the tensile strength is identical. This suggests that it would be possible to improve mechanical properties of steel sheets for press forming by this method.
|
