Stephen L Bennett

Title: Innovations of Stephen L. Bennett

Introduction

Stephen L. Bennett is a notable inventor based in Rochester Hills, MI (US). He has made significant contributions to the field of cemented carbide technology, holding a total of five patents. His work focuses on enhancing the performance and durability of cutting tools through innovative materials and processes.

Latest Patents

One of his latest patents is titled "Cemented carbide article having binder gradient and process for producing the same." This invention describes an eta-phase-free cemented carbide insert that boasts improved surface hardness and wear resistance. The insert contains tungsten carbide (WC) and possibly cubic phases of carbide and/or carbonitride, all within a binder phase of cobalt, nickel, iron, or a combination thereof. The binder phase gradient is strategically designed in the surface and near-surface regions, with a nominal binder phase content ranging from 3-20 weight percent. The cobalt content in the surface and near-surface areas is maintained at 50-100% of the binder phase content found in the inner portion of the insert. The manufacturing process involves standard sintering practices, followed by the chemical removal of the binder phase from the surface and near-surface regions. The insert is then heat-treated at temperatures between 1300-1350°C in a carburizing atmosphere for a duration of 5-400 minutes, facilitating the diffusion of the binder phase from the interior into the binder-depleted surface regions.

Another significant patent involves methods for producing an adherent diamond film on a cemented metal carbide substrate. This invention outlines the preparation of the surface of a cemented metal carbide to allow for the deposition of a polycrystalline diamond coating using chemical vapor deposition (CVD) techniques. The cutting tool inserts produced from these diamond film-coated cemented metal carbide articles are also disclosed, showcasing the practical applications of his innovations.

Career Highlights

Stephen L. Bennett has established a successful career at Valenite, Inc., where he continues to innovate in the field of cutting tools and materials. His expertise in cemented carbide technology has positioned him as a key figure in the industry, contributing to advancements that enhance tool performance and longevity.

Collaborations

Throughout his career, Bennett has collaborated with notable colleagues such as Deepak G. Bhat and Darrell Johnson. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas.