| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Advanced Joining Technologies for Automotive Lightweight Structures
|
| Presentation Title |
Development of Solid-state Resistance Spot Joining Method |
| Author(s) |
Hidetoshi Fujii |
| On-Site Speaker (Planned) |
Hidetoshi Fujii |
| Abstract Scope |
We have developed a new joining method, which allows carbon steel to be welded in a solid state. The electorde consists of a central pressure rod made of tungsten carbide, which is responsible only for applying pressure, and a cylindrical electrode made of a copper-chromium alloy, which is responsible only for energizing the electrode. The center presser rod was pressurized by an AC servo press. The cylindrical copper electrode is controlled separately from the central pressure rod. The welding temperature can be controlled by the applied pressure given by the central pressure rod. The sound S45C joints were successfully welded below the A1 point (723 degC) without martensitic transformation. A high strength steel such as HT1180 or dissimilar materials are also welded within 1s. We succeeded in obtaining high-strength joints that achieves plug failure at the base metal for all combinations. |