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.
lath martensite
austenite grain-size
operties microstructure and processing
chip
low-carbon steels
crystallography
toughness
morphology
formation
strength
Author
Seyyed Mohammad Hamed Hoseiny
Research and Development
F. G. Caballero
Spanish National Research Council (CSIC)
Berne Högman
Research and Development
D. San Martin
Spanish National Research Council (CSIC)
C. Capdevila
Spanish National Research Council (CSIC)
L. G. Nordh
Research and Development
Hans-Olof Andrén
Chalmers, Applied Physics, Materials Microstructure
Chalmers, Applied Physics, Microscopy and Microanalysis
Journal of Materials Science
0022-2461 (ISSN) 1573-4803 (eISSN)
Vol. 47 8 3613-3620Subject Categories (SSIF 2011)
Materials Engineering
Manufacturing, Surface and Joining Technology
Areas of Advance
Materials Science
DOI
10.1007/s10853-011-6208-y