Vacuum Sintering Studies On Chromium Alloyed PM Steels
Paper i proceeding, 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

Författare

Maheswaran Vattur Sundaram

Chalmers, Material- och tillverkningsteknik, Yt- och mikrostrukturteknik

Seshendra Karamchedu

Chalmers, Material- och tillverkningsteknik, Yt- och mikrostrukturteknik

Clément Gouhier

Chalmers, Material- och tillverkningsteknik, Yt- och mikrostrukturteknik

Eduard Hryha

Chalmers, Material- och tillverkningsteknik, Yt- och mikrostrukturteknik

Lars Nyborg

Chalmers, Material- och tillverkningsteknik, Yt- och mikrostrukturteknik

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

Ny sintringsstrategi för konkurrenskraftig tillverkning av högpresterande pulvermetallurgiska komponenter

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

Drivkrafter

Hållbar utveckling

Ämneskategorier

Materialteknik

Metallurgi och metalliska material

Styrkeområden

Produktion

Materialvetenskap