| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.12 ( July 1985 ) Special Issue on Hot-and Cold-rolled Steel Sheets ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Spot-Weldable Vibration-Damping Composite Sheet Steel "NONVIBRA" Masatoshi Shinozaki, Yoshihiro Matsumoto, Minoru Nishida, Toshio Irie, Yukio Furukawa, Junsuke Takasaki |
|
Synopsis : Composite damping sheet steels which are composed of two steel-sheet skin layers and a centrally disposed viscoelastic resin layer have been attracting attention. The composite damping sheet steels have better damping ability than that of other types of damping sheets and similar formability to that of conventional sheet steels. Therefore, they are expected to be widely used for many machinery and equipment components. The composite damping sheet steels, however, have poor spot-weldability, because their core resins have no electric conductivity. A few methods of welding performance have been proposed to resolve such trouble. Kawasaki Steel has developed a spot-weldable composite damping sheet steel "NONVIBRA" by adding graphite particles to resin layers, and resolved this trouble basically. A role played by graphite is to provide a current path at the beginning of spot welding. A critical radius and critical amount of graphite particles for this purpose depend on the thickness of the resin layer. Graphite in the resin layer does not affect other characteristics such as the loss factor and adhesion. |
| TextiPDF: 10p./447kbj |