PVD coating to Improve Die Durability in Press Working of 1470MPa Class High Tensile Strength Steel
1470MPa級ハイテン材のプレス加工における金型耐久性向上のためのPVD皮膜
- Delivery
- Available on the other site
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- Publication code
- 20254053
- Paper/Info type
- JSAE Transaction
Vol.56 No.1
- Pages
- 171-176(Total 6 p)
- Date of publication
- Jan 2025
- Publisher
- JSAE
- Language
- Japanese
Detailed Information
| Category(J) | 論文 Translation |
|---|---|
| Category(E) | Paper |
| Author(J) | 1) 金沢 竜太朗, 2) 関 奈那子, 3) 西野 創一郎, 4) 角谷 行崇, 5) 幸田 稔 |
| Author(E) | 1) Ryutaro Kanazawa, 2) Nanako Seki, 3) Souichiro Nishino, 4) Yukitaka Sumiya, 5) Minoru Kouta |
| Affiliation(J) | 1) 茨城大学, 2) 茨城大学, 3) 茨城大学, 4) 日本コーティングセンター, 5) 山野井精機 |
| Abstract(J) | 本研究では，現在使用されている自動車用鋼板の中で最大の引張強度1470MPa級ハイテン材のプレス加工金型に，耐久性向上を目的としてPVD法によるコーティング処理を施した．金型表面に複層かつ硬度差が少ない傾斜層を導入したPVD皮膜をコーティングすることで，加工時に金型にかかる負荷応力を緩和して損傷を抑制することができる． Translation |
| Abstract(E) | In this study, PVD coatings were applied to press dies for high-tensile steel with a tensile strength of 1470 MPa, the highest tensile strength among automotive steel sheets currently in use, to improve durability. Detailed observation of the die surfaces during the pressing process was conducted to clarify the damage mechanism and to create a highly durable PVD coating. The results obtained are shown below. Damage to PVD-coated molds during press working is caused by adhesion of the work material in the concave areas where droplets generated during film deposition are removed by polishing. The surface pressure increases at the adhesion area, and the load on the die locally increases, resulting in destruction of the coating. By coating the die surface with a PVD coating that has multiple layers and a gradient layer with a small difference in hardness, the load stress on the die during machining can be alleviated and damage can be suppressed. |
