Almalyk branch of the National University of Science and Technology MISIS, Almalyk, Uzbekistan
E. S. Nabiev, Cand. Eng., Associate Prof., Dept. of Metallurgy, e-mail: nes.2406@mail.ru
A. A. Fatkhullin, Senior Lecturer, Dept. of Metallurgy
Sh. M. Khudoyberdiev, Cand. Eng., Associate Prof., Dept. of Mining Engineering

It is proposed to extend the service life of crushers` beaters by creating a bimetallic structure consisting of a low-carbon steel base and a working surface obtained as a result of multielectrode horizontal electroslag cladding of a high-carbon alloy using an alloying charge. During the cladding process, a layer of a special wear-resistant metal, which is a high-carbon hypoeutectic alloy alloyed with chromium and manganese, is applied to the beater`s workpiece in one pass. The average hardness of the deposited metal is 55 HRC. The workpiece material is carbon steel of ordinary quality. The fusion boundary has a eutectoid structure, which transforms into the hypoeutectoid structure of low-carbon steel in the heat-affected zone. The absence of brittle hardening structures in the heat-affected zone is the basis for a preliminary judgment about the reliability of the fusion of the base and deposited metals. The hardness and uniformity of the microstructure over the cross section of the cladding, along with layer-by-layer chemical analysis, served as a criterion for judging the uniformity of alloying. It has been established that a large, long-lasting pool of molten metal with powerful convective currents helps to equalize the chemical composition throughout the entire volume and reduce structural heterogeneity. The conducted research allows to assert that the quality of the deposited metal is high, and the method of horizontal electroslag cladding can be recommended for development of technology for industrial production of bimetallic beaters.

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