ASM Failure Analysis Case Histories: Machine Tools and Manufacturing Equipment
Thermal Fatigue Failure of a CrN-Coated Restrike Punch
-
Published:2019
Abstract
A CrN coated restrike punch was made of WR-95 (similar to H-11), which was fluidized bed nitrided. The coated punch was used on hot Inconel at about 1040 deg C (1900 deg F). However, a water-soluble graphite coolant was used to maintain the punch temperature at 230 deg C (450 deg F). Visual and binocular inspection at 64+ revealed presence of cracks and complete washout of coating in the working area of the failed punch. Comparison of metallographic cross sections of used and unused punches revealed a significant microstructural transformation in case of the used punch. Presence of a...
Sign in
ASM members
Member Sign InSuranjeeta Dhar, Fameeda Mohammed, Laura Xu, Raymond Fontana, Thermal Fatigue Failure of a CrN-Coated Restrike Punch, ASM Failure Analysis Case Histories: Machine Tools and Manufacturing Equipment, ASM International, 2019, https://doi.org/10.31399/asm.fach.machtools.c9001574
Download citation file:
Understanding the Basics Collection
8-Volume Digital Library Exclusive
The Understanding the Basics Collection provides comprehensive coverage of critical topics in metallurgy. These introductory guides present critical information on key topics related to materials processing, performance, and evaluation.
