Tribological studies on high speed steel cutting tools: Final report

Technical Report · Tue Sep 01 00:00:00 EDT 1987

OSTI ID:6039185

Lin, P; Deshpandey, C; Doerr, H J; Bunshah, R F

Carbide and nitride coatings of Ti, Zr and Hf were prepared using the Activated Reactive Evaporation process. The effect of deposition conditions on structure and properties of these coatings was evaluated. Optimum deposition conditions to obtain high values of microhardness in the coatings were established. High-speed steel cutting tools were coated under the respective optimum conditions and were tested for cutting performance. Results indicated that the coated inserts performed significantly better than uncoated inserts. ZrN coated inserts showed the best performance. Preliminary work was also carried out to synthesize (TiAl)N and (TiAl)C coatings. Coatings in the composition range (Ti/Al) between 80:20 to 30:70 were prepared. X-ray diffraction studies on the (TiAl)N coatings showed major peaks corresponding to TiN and very small peaks corresponding to AlN phase. Similarly (TiC) was found to be a major phase in (TiAl)C coatings. The microhardness of the coatings varied depending on their composition. Lower values observed for the microhardness of these coatings are believed to be due to the very small thickness of the coatings, (approx.1 ..mu..m) for a 50 g load used in the hardness measurements.

• Research Organization: California Univ., Los Angeles (USA). Dept. of Materials Science and Engineering
• DOE Contract Number: AC02-84CE90227
• OSTI ID: 6039185
• Report Number(s): DOE/CE/90227-1; ON: DE88002550
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
CUTTING TOOLS
HARD FACING
SURFACE COATING
TRIBOLOGY
HAFNIUM CARBIDES
DEPOSITION
HAFNIUM NITRIDES
MICROHARDNESS
TITANIUM CARBIDES
TITANIUM NITRIDES
ZIRCONIUM CARBIDES
ZIRCONIUM NITRIDES
ADHESION
MORPHOLOGY
ORIENTATION
PARTIAL PRESSURE
PERFORMANCE TESTING
PHASE TRANSFORMATIONS
TEMPERATURE EFFECTS
CARBIDES
CARBON COMPOUNDS
HAFNIUM COMPOUNDS
HARDNESS
MECHANICAL PROPERTIES
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
REFRACTORY METAL COMPOUNDS
TESTING
TITANIUM COMPOUNDS
TOOLS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
360203* - Ceramics
Cermets
& Refractories- Mechanical Properties
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies
320303 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Equipment & Processes