Analysis of the life of cemented carbide drills with modified surfaces

The performance of cemented carbide cutting tools during machining is influenced not only by the mechanical properties of the coating and substrate but also by the topographies of their surfaces. A tool with good coating and substrate properties but unsuitable topographies may exhibit accelerated we...

Full description

Saved in:
Bibliographic Details
Published in:International journal of advanced manufacturing technology 2014-04, Vol.71 (9-12), p.2125-2136
Main Authors: do Nascimento Rosa, Sílvia, Diniz, Anselmo Eduardo, Neves, Davi, Salles, Bruno Barbosa, Guerreiro, Sergio Stefano
Format: Article
Language:English
Subjects:
CAE) and Design
Carbide cutting tools
Carbide tools
Cemented carbides
Comminution
Computer-Aided Engineering (CAD
Crankshafts
Drilling
Drills
Engineering
Industrial and Production Engineering
Machining
Mechanical Engineering
Mechanical properties
Media Management
Original Article
Physical vapor deposition
Residual stress
Substrates
Surface roughness
Tool life
Tool steels
Tool wear
Wear mechanisms
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The performance of cemented carbide cutting tools during machining is influenced not only by the mechanical properties of the coating and substrate but also by the topographies of their surfaces. A tool with good coating and substrate properties but unsuitable topographies may exhibit accelerated wear and, consequently, impaired performance. In this work, drills coated using physical vapor deposition (PVD) were produced with different substrate textures, which in turn generated different coating textures. The surface roughness values of the coated drills were measured together with the residual stress at the interface between substrate and coating. Drilling tests were performed and tool wear was measured during the machining process. Two different tool coatings were studied: TiAlN and TiAlCrSiN. The goal was to study how the characteristics of the substrate and coating (material, surface topography, and residual stress) influence tool life. Tool life experiments were carried out using drilling tests in AISI 1548 steel, which is often used in crankshafts. The primary tool wear mechanism was attrition in all the drills. The main conclusion of this work is that the tool with the lowest roughness and a TiAlCrSiN coating had the best performance in the conditions tested here.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-013-5598-1