Abstract:
A process for making open-celled silicon carbide inserts that allow metal infiltration to create metal-matrix composite parts used for rubbing/wear components, such as an open-celled ceramic ring. The open-celled ceramic insert is infiltrated by cast iron, and produces no negative effects to the iron casting process or the final metal- matrix composite product such as casting porosity or gas build-up inside the mold. Inserts constructed in accordance with the invention enable manipulation and control over the density and weight of final metal-matrix composite products. It is an advantageous characteristic of such inserts that they enable manipulation and control over the dampening characteristics of final metal-matrix composite products.
Abstract:
A method of processing a metal for improved damping of a metal part is provided. The method comprises placing the metal part inside a current carrying coil and closing a circuit for to apply current to the coil, thus producing a magnetic field in the metal part. Thereafter, the circuit is opened for a time and then the circuit is closed a second time to apply a second current to the coil. The circuit is then opened a second time and the metal part is removed from the current carrying coil.
Abstract:
A process for making open-celled silicon carbide inserts (20) that allow metal infiltration to create metal-matrix composite part (100, 300) used for rubbing/wear components, such as an open-celled ceramic ring. The open-celled ceramic insert (20) is infiltrated by cast iron, and produces no negative effects to the iron casting process or the final metal-matrix composite product (100, 300) such as casting porosity or gas build-up inside the mold. Inserts (20) constructed in accordance with the invention enable manipulation and control over the density and weight of final metal-matrix composite products (100, 300). It is an advantageous characteristic of such inserts (20) that they enable manipulation and control over the dampening characteristics of final metal-matrix composite products (100, 300).