CVD and PVD coated cutting tools

US5143488A · kind A · utility

Assignee

• KENNAMETAL INC. · US

Inventors

• Anakkavur T. Santhanam · Monroeville, US
• Rajendra V. Godse · Greensburg, US
• Dennis T. Quinto · Greensburg, US
• Kenneth E. Undercoffer · Greensburg, US
• Prem C. Jindal · Uniontown, US

Key dates

• Filing date: Sep 17, 1990
• Grant date: Sep 1, 1992
• Expiry date: Sep 17, 2010

Classification

• Technology area (CPC —): General

Abstract

Provided is a coated cutting tool having a coating and a substrate. The coating includes at least one chemical vapor deposited (CVD) layer and at least one physical vapor deposited (PVD) layer. The outermost layer of the coating is a PVD layer, containing residual compressive stresses. The substrate is a composite having hard refractory grains bonded together by a binder material.