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Reduced Weight Scatter with Bonded Powder Mixes
Edman Daniel,Alzati Luigi,Pozzi Giovanni,Frediani Carlo,Crosa Riccardo,Larsson Mats 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
Organically bonded P/M mixes have been developed to improve the stability of dimensional properties by reducing the segregation of the mix constituents and improving the filling characteristics. Robustness and reliability are key factors for the promotion of P/M as cost effective substitute of competing manufacturing technologies. Based on the production of four different belt pulleys, this paper presents the achievement of reduced weight scatter and close dimensional control realizable by using a StarmixTM that is organically bonded.
Controlled Microstructure for Optimum Fatigue Performance
Takeda Yoshinobu,Bergmark Anders,Alzati Luigi,Bengtsson Sven 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
Optimized choice of material for two principally different types of PM components is presented. The first is characterized by high stresses in areas with high stress concentrations (for example synchronizer hubs with very sharp notches, typically <0.25mm in the pre-synchronizer slot and the inner splines). The second type has slightly larger notch radii (small spur gears and sprockets with typically notch radii between 1- 3mm). Diffusion alloyed materials are well suited for sharp notch components. Pre-alloyed materials are also well suited for applications with sharp notches if compressive residual stresses in the notch roots are created by appropriate process control. A free choice of material is available for components with the larger notch radii.