The effect of the martensitic packet size on the machinability of modified AISI P20 prehardened mold steel
Journal article, 2012
The effect of martensitic packet size on the machinability of prehardened mold steel at a hardness of similar to 40 HRC (typical hardness for prehardened mold steels) was studied in terms of cutting force and tool life. The machinability tests were performed in end milling using coated, cemented carbide tools at three different cutting speeds. The results showed that an increase in the martensite packet size led to higher cutting force and shorter tool life. The increase in cutting force was related to the increase of work hardening. The work material with a coarser martensite packet size showed a higher amount of work hardening that can explain the higher cutting force. The longer tool life in the workpieces with finer structure was correlated to smaller amplitude of the variation in cutting force.
morphology
austenite grain-size
low-carbon steels
formation
chip
operties microstructure and processing
strength
crystallography
lath martensite
toughness
Author
Seyyed Mohammad Hamed Hoseiny
Research and Development
F. G. Caballero
CSIC - Centro Nacional de Investigaciones Metalurgicas (CENIM)
Berne Högman
Research and Development
D. San Martin
CSIC - Centro Nacional de Investigaciones Metalurgicas (CENIM)
C. Capdevila
CSIC - Centro Nacional de Investigaciones Metalurgicas (CENIM)
L. G. Nordh
Research and Development
Hans-Olof Andrén
Chalmers, Applied Physics, Microscopy and Microanalysis
Chalmers, Applied Physics, Materials Microstructure
Journal of Materials Science
0022-2461 (ISSN) 1573-4803 (eISSN)
Vol. 47 8 3613-3620Subject Categories
Materials Engineering
Manufacturing, Surface and Joining Technology
Areas of Advance
Materials Science
DOI
10.1007/s10853-011-6208-y