Assessment of the surface integrity of ground cemented tungsten carbide cutting inserts and its influence on tool wear in turning of ferritic nodular cast iron

Author(s)

Cruz, D. C. ; Sordi, V. L. ; Ventura, C. E. H.

• Document type: Journal article
• Source: CIRP JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY; v. 37, p. 10-pg., 2022-04-02.

Abstract

In order to improve surface finish, geometric and dimensional tolerances of cemented tungsten carbide cutting tools produced by powder metallurgy, grinding is commonly applied. Due to the high thermal and mechanical loads generated during this process, surface and metallurgical characteristics are directly af-fected and, as a result, tool performance. Within this context, the influence of grinding wheel characteristics on surface integrity parameters, like surface and edge roughness, hardness and residual stress, was in-vestigated and cutting inserts ground under extreme conditions were applied in rough orthogonal turning of a ferritic nodular cast iron to evaluate their performance regarding tool life. The obtained results showed that higher compressive residual stress values, induced by a vitrified bonded diamond grinding wheel with grain size of 46 mu m, contributed to increase tool life, as a protective layer of adhered material was formed on the cutting edge. Flank wear by abrasion was thus avoided and crack formation was the determining factor for the end of the tests.(c) 2022 CIRP. (AU)

• FAPESP's process: 17/12309-7 - Multi-user equipment approved in grant 15/15622-2: microscope for three-dimensional image analysis
• Grantee: Carlos Eiji Hirata Ventura
• Support Opportunities: Multi-user Equipment Program
• FAPESP's process: 17/12304-5 - Multi-user equipment approved in grant 15/15622-2: CNC grinding machine for cutting insert preparation
• Grantee: Carlos Eiji Hirata Ventura
• Support Opportunities: Multi-user Equipment Program
• FAPESP's process: 18/24614-1 - Plan of Implementation of the Year 2018 Technical Reserve Parcel (Base 2017) for Infrastructure Institutional Costs Center for Physical Sciences and Technology (CCET) UFSCAR
• Grantee: Luiz Fernando de Oriani e Paulillo
• Support Opportunities: Research Grants - Technical Reserve for Institutional Research Infrastructure
• FAPESP's process: 15/15622-2 - Influence of grinding parameters in the manufacturing of cemented tungsten carbide inserts on their performance in turning of a titanium alloy
• Grantee: Carlos Eiji Hirata Ventura
• Support Opportunities: Research Grants - Young Investigators Grants