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Cost reduction by using new Ni-free PM steels

 
: Lipp, K.; Bas, J.; Blanchard, C.; Johansson, M.; Baum, U.

Kosuge, K. ; Japan Society of Powder and Powder Metallurgy -JSPM-:
Powder Metallurgy World Congress 2000. Proceedings
Kyoto: Japan Society of Powder and Powder Metallurgy, 2000
ISBN: 4-9900214-8-7
S.230-233
Powder Metallurgy World Congress <2000, Kyoto>
Englisch
Konferenzbeitrag
Fraunhofer LBF ()
material property; material selection; manufacturing process; steel; powder metallurgy; Woehler curve; gear; vehicle construction; fatigue behaviour; economy

Abstract
In order to be prepared for possible end-user's requests to apply high-strength PM parts without processing nickel a consortium consisting of three part producers, a powder manufacturer, a gear-box producer and two research institutes started a BRITE-EuRam project in order to evaluate industrially acceptable nickel-free alloys. The comparative base for the material development was given by the diffusion alloyed PM steel Fe-4.0Ni-1.5Cu-0.5Mo mixed with 0.6C at 7.1 g/cm 3. Among 15 candidate alloy systems the prealloyed material (Fe-3.0Cr-0.5Mo) mixed with 0.5Cu and 0.3C was selected as the most promising one with regard to powder flow, spring-back behaviour, dimensional stability after sintering and mechanical properties. The performance of the new material is verified on the example of three fatigue loaded gear-box components.

: http://publica.fraunhofer.de/dokumente/N-5358.html