2012 Fiscal Year Final Research Report
Clarification of High-Efficiency, Deep-Penetration Welding Mechanism with High-Brightness Laser under Partial, Low-Vacuum Atmosphere
| Project/Area Number |
22560723
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Material processing/treatments
|
|---|
| Research Institution | Osaka University |
|---|
Principal Investigator |
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
KATAYAMA Seiji 大阪大学, 接合科学研究所, 教授 (10144528)
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
NISHIMOTO Kouji 阿南工業高等専門学校, 機械工学, 准教授 (40501169)
|
|---|
| Project Period (FY) |
2010 – 2012
|
| Keywords | 溶接 / 接合 |
|---|
| Research Abstract |
Deep penetration is an important advantage in laser welding. This study was undertaken in order to clarify high-efficiency, deep-penetration welding mechanism including weldability, optical characteristics of laser-induced plume and keyhole behaviors in molten pool with brightness laser under partial, low-vacuum atmosphere. The penetration depths were over 2.5 times as deep as those obtained at 101 kPa. Refraction of incident laser caused by laser-induced plume was drastically reduced corresponding to surrounding pressure of 101 to 0.1 kPa. X-ray high-speed observation revealed that keyhole is unstable but porosity is not formed.
|
