en گروه سطح پوشش و خوردگی Surface Coatings and Corrosion Research Paper Research Paper <p>The boronizing of a tungsten heavy alloy containing Ni and Fe as the major alloying elements were performed in the present study to increase its surface hardening. Pack cementation method was employed as a well-known, successful solid-state process for boronizing. The coating treatment was accomplished at different temperatures of 1000, 1050 and 1100&deg;C for 6 and 9 hours. The formation of tungsten boride phase was confirmed, although a silicide layer covered the surface of the specimen as the outer layer. The mechanism of the formation of a multilayered surface was explained. The maximum thickness of reaction zone and surface hardness achieved in the current work were 300 &micro;m and 2470 HV, respectively.</p> Tungsten alloy, Hardening, Boronizing, Pack cementation 58 68 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-375-2&slc_lang=en&sid=1 A. Ataei ali.ataee110@gmail.com 180031947532846004758 180031947532846004758 No School of Metallurgy and Materials Engineering, Iran University of Science and Technology M. Jalaly maisam_jalaly@iust.ac.ir 180031947532846004759 180031947532846004759 Yes Nanotechnology Department, School of New Technologies, Iran University of Science & Technology M. Tamizifar tamizifar@iust.ac.ir 180031947532846004760 180031947532846004760 No School of Metallurgy and Materials Engineering, Iran University of Science and Technology