Tribological Behavior of Distaloy DC Components


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Öksüz K. E. , Akınalp Y. A. , Kumruoğlu L. C.

10th International Conference on Materials Science Engineering (Bramat 2017), Brasov, Romania, 8 - 11 March 2017, vol.907, pp.121-125 identifier

Abstract

A sintered material based on pre-alloyed powders (Fe-Ni-Mo) is expansively applied in

the automotive industry and Distaloy is today the most widely used raw material worldwide for the

production of complex, precise, high strength PM machine parts. In this study a diffusion bonded

powder type of Distaloy DC (Fe-2 wt. % Ni-1.5 wt. % Mo, Höganäs-Sweden) was used. It was

alloyed by 0.5 and 1 wt. % silicon carbide with the addition of 0.6 wt. % lubricant in the form of

introlube®. All the powder mixtures were compacted at 600 MPa, and then sintered for 30 min. in

argon atmosphere at 1120° C. After the completed sintering process, the sintered alloy samples

were gas-nitrided 1h at 490 °C and 6h at 540 °C, respectively, and cooled slowly to room

temperature still under the ammonia atmosphere. The effects of varied amounts of SiC particles on

the tribological behavior of nitrided-sintered Distaloy DC composites were investigated.

Keywords: Distaloy DC, nitriding, SiC, sintered steel, wear.