日本金属学会誌

J. Japan Inst. Met. Mater, Vol. 82, No. 08 (2018),
pp. 277-280

Pulsed Electric Current Sintering of FeS Powder

Kazuya Horie 1, Kohei Ueta 2 and Makoto Nanko 1

1 Department of Mechanical Engineering, Graduate School of Engineering, Nagaoka University of Technology
2 Department of Mechanical Engineering, Nagaoka University of Technology

Abstract:

Hot hammer forging is a useful manufacturing process for producing mechanical parts with excellent mechanical properties. One of the problems in this forming process is seizure between die and work-piece. It does not only decrease quality of the products and the productivity but also put a worker in danger. In order to avoid the seizure in forging process, sulfonitriding to die surface has been often applied. The surface treatment provides a nitrided zone with a sulfide layer as a top layer. The nitrided zone has higher hardness of the die while the sulfide layer improves anti-seizure ability and decreases the friction coefficient. The sulfide layer on the die surface is constituted of Iron sulfide (FeS). However, mechanical and physical properties of FeS have not been investigated yet. In the present study, pulsed electric current sintering of FeS powder was studied to fabricate dense sintered bodies of bulk FeS for evaluating physical and mechanical properties. Some mechanical properties such as Vickers hardness and fracture tougŠess of sintered FeS were evaluated in the present report.

[doi:10.2320/jinstmet.JBW201710]


(Received 2018/01/11)

Keywords:

iron sulfide (FeS), sulfonitriding, pulsed electric current sintering (PECS)


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