Abstract
The application of the iron based Powder Metal (PM) compacts in Ultra-High Frequency Induction Sintering (UHFIS) was reviewed for different environments. The three different environments: atmosphere, argon and vacuum were applied to the PM compacts. Iron based PM compacts were sintered at 1120 °C for a total of 550 seconds by using induction sintering machines with 2.8 kW power and 900 kHz frequency. Micro structural properties, densities, roughness and micro hardness values were obtained for all environments. The results were compared with each other.
Highlights
Powder metallurgy is a continually and rapidly evolving technology embracing most metallic and alloy materials, and a wide variety of forms
This paper presents the effects of the atmosphere, argon and vacuum environments in the ultra-high frequency induction sintering process for iron based powder metal compacts
If we compare the surface appearance and sizes of the Powder Metal (PM) compacts, several significant differences were observed as follow
Summary
Powder metallurgy is a continually and rapidly evolving technology embracing most metallic and alloy materials, and a wide variety of forms. Powder metals is always a competitive technology compared to others noncommercial applications. The reasons for using powder metal technology include good tolerances, low cost, net shaping, high production rates, and controllable properties (German, 1994). Common sintering conditions are: 15–60 minutes at 1120–1150 °C (German, 2005). Particles of commercial iron powders for structural parts are usually ≤150 μm.
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