Characterization of coating wear phenomena in nitride and carbide coated tool inserts

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:7150683

Fenske, G R; Kaufherr, N; Lee, R H; Kramer, B M; Bunshah, R F; Sproul, W D

Hard nitride- and carbide- coatings of Ti, Zr, and Hf were deposited on T-15 cutting tool inserts using high-rate reactive sputtering (HRRS) and activated reactive evaporation (ARE) processes. The coated inserts were subjected to a series of metal cutting tests to evaluate their performance and to compare their relative ranking with wear model predictions. The cutting tests indicated the coated inserts outperformed uncoated inserts by a factor of 2- to 10 depending on the coating process and composition; however their ranking based on measured lifetime (to reach a 0.003 in. crater depth) did not agree with predicted wear model predictions. Subsequently, a series of short-term cutting tests were initiated to study the wear behavior of the coatings during the early stages of the wear process when the coating was still intact. Post-test examination of the inserts suggest that the predominant wear mechanism was not due to abrasion or thermochemical dissolution as predicted by the model, but was a result of substrate softening followed by microfracture of the coating. The substrate softening is attributed to the severe cutting conditions (325 sfpm under dry cutting conditions) used in the cutting tests. 12 refs., 5 figs., 1 tab.

• Research Organization: Argonne National Lab., IL (USA); George Washington Univ., Washington, DC (USA); California Univ., Los Angeles (USA); Northwestern Univ., Evanston, IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 7150683
• Report Number(s): CONF-880488-5; CONF-880488-; ON: DE88011196
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALLOYS
CARBIDES
CARBON COMPOUNDS
COATINGS
CUTTING
CUTTING TOOLS
HAFNIUM CARBIDES
HAFNIUM COMPOUNDS
HAFNIUM NITRIDES
HARD FACING
HARDNESS
IRON ALLOYS
IRON BASE ALLOYS
MACHINING
MECHANICAL PROPERTIES
MICROHARDNESS
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
REFRACTORY METAL COMPOUNDS
STEELS
TITANIUM CARBIDES
TITANIUM COMPOUNDS
TITANIUM NITRIDES
TOOLS
TRANSITION ELEMENT COMPOUNDS
WEAR RESISTANCE
ZIRCONIUM CARBIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM NITRIDES