Characterization and Evaluation of Engineered Coating Techniques for Different Cutting Tools-Review

Area of Science:

• Materials Science
• Manufacturing Engineering
• Tribology

Background:

• Hard coatings enhance cutting tool performance through wear resistance and thermal insulation.
• Physical Vapor Deposition (PVD) and Chemical Vapor Deposition (CVD) are key methods for applying protective coatings.
• Coating materials include nitrides, carbides, carbonitrides, borides, boronitrides, and oxides, often in multilayer stacks.

Purpose of the Study:

• To review the current state of research on hard coatings for cutting tools.
• To examine the impact of cutting-zone temperatures on multilayer coating characteristics during metal cutting.
• To establish correlations between synthesis, structure, properties, and application performance of various coatings.

Main Methods:

• Review of existing literature on PVD and CVD hard coatings.
• Analysis of pioneering and recent research findings.
• Examination of "synthesis-structure-property-application performance" correlations.

Main Results:

• Tool coatings reduce direct workpiece-tool contact, altering cutting temperatures and machining performance.
• Comparison of different coating types based on deposition methods and material classes.
• Identification of key factors influencing coating effectiveness in metal cutting.

Conclusions:

• Hard coatings significantly improve machining performance by modifying the cutting environment.
• Understanding the interplay between cutting temperature and coating properties is crucial.
• Further research is needed to address existing and prospective challenges in hard coating technology.