Vacuum Sintering Studies On Chromium Alloyed PM Steels
Paper in proceedings, 2016

Recent advancements in vacuum furnace technologies have led to an increased interest in vacuum sintering of Powder Metallurgy (PM) steel components owing to the robustness, productivity and the possibility to integrate heat-treatment into the process at an attractive cost. In the present study the potential for vacuum sintering of chromium-alloyed PM steels and the effect of the vacuum level on the final properties of the components is evaluated. The studies were performed on Fe-1.8 wt.% Cr powder and the sintering experiments were performed in a dilatometer. Four different vacuum levels: 1, 10, 10-2 and 10-4 mbar were studied and the effect of density and carbon content were also examined. The results indicate an efficient oxide reduction and process robustness at intermediate vacuum levels whereas high-temperature sintering in high vacuum brings risk of Cr-sublimation. Still, applying proper conditions, vacuum sintering proved to be an attractive alternative to process Cr-alloyed steel powders. The influence of vacuum level on the sintering efficiency of chromium-alloyed PM steels is studied.

vacuum sintering

sublimation during sintering

PM steels

oxide reduction

Author

Maheswaran Vattur Sundaram

Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering

Seshendra Karamchedu

Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering

Clément Gouhier

Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering

Eduard Hryha

Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering

Lars Nyborg

Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering

World Powder Metallurgy 2016 Congress and Exhibition, World PM 2016; Hamburg; Germany; 9 October 2016 through 13 October 2016

Novel sintering strategy for the competitive manufacturing of the high-performance PM components

VINNOVA, 2013-10-01 -- 2016-12-31.

Driving Forces

Sustainable development

Subject Categories

Materials Engineering

Metallurgy and Metallic Materials

Areas of Advance

Production

Materials Science

More information

Latest update

7/29/2018