Abstract
The composition of Ni and Mo containing composite-type alloyed steel powders was optimized for the production of ultra high strength, high toughness sintered components via compaction, sintering and heat treatment. A powder with 2%Ni and 1%Mo attained a high tensile strength of 1500MPa and a high unnotched Charpy impact value of 21J, when single-pressed, single-sintered and case hardened. Double-pressed, double-sintered and heat treated compacts made from the same powder showed an extremely high tensile strength of 1920MPa and a high unnotched Charpy impact value of 53J. The sintered compacts before heat treatment remained relatively soft and allowed machining and sizing. The strengthening was attributed to the strain-induced martensitic transformation of Ni-rich austenite.
Original language | English |
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Pages (from-to) | 225-228 |
Number of pages | 4 |
Journal | Journal of the Japan Society of Powder and Powder Metallurgy |
Volume | 37 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1990 |
All Science Journal Classification (ASJC) codes
- Mechanical Engineering
- Industrial and Manufacturing Engineering
- Metals and Alloys
- Materials Chemistry