日本金属学会誌

J. Japan Inst. Met. Mater, Vol. 81, No. 06 (2017),
pp. 295-300

Formation of a TiAl3 Layer by an AIH-FPP Treatment Using Mechanically Milled Particles and Its Wear Resistance

Shuya Saito 1, Shogo Takesue 1, Jun Komotori 2, Kengo Fukazawa 3 and Yoshitaka Misaka 3

1 School of Integrated Design Engineering, Graduate School of Science and Technology, Keio University
2 Department of Mechanical Engineering, Faculty of Science and Technology, Keio University
3 Research and Development Center, Neturen Co., Ltd.

Abstract:

In order to form a Ti-Al intermetallic compound layer on a carbon steel surface, an atmospheric-controlled induction heating fine particle peening (AIH-FPP) treatment was performed at 1000°C in argon atmosphere. The shot particles were prepared by a mechanical milling method. Titanium and aluminum particles at molar ratios of one to three were mechanically milled by a planetary ball mill for 6 h. The treated surface was analyzed using a scanning electron microscope, an energy dispersive X-ray spectrometer and X-ray diffraction. The reciprocating dry wear tests were performed under the following conditions; an opposing material of alumina balls of 3 mm in diameter, a load of 2.0 N, a sliding speed of 600 mm/min and a sliding distance of 224 m. The results showed that a Ti-Al intermetallic compound layer consisting mainly of TiAl3 formed on the surface of carbon steel by AIH-FPP treatment. This was because the shot particles were transferred to the substrate and the aluminum and titanium in the particles reacted neither excessively nor insufficiently. The AIH-FPP treated surface showed a higher wear resistance than that of the un-treated surface. This was because the wear mode of carbon steel changed from abrasive wear to adhesive wear owing to the formation of the Ti-Al intermetallic compound layer on the surface.

[doi:10.2320/jinstmet.J2016063]


(Received 2016/10/31)

Keywords:

surface modification, induction heating, fine particle peening, mechanical milling, intermetallic compound, combustion synthesis reaction, wear resistance


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