Hard Alloys Recycling as a Promising Direction of Technological Equipment for Machine-Building Production

Abstract

The sequence and development of the life cycle of a machine-building product are described. Metals recycling, specifically hard alloys, is considered one of the important economically profitable directions of production development. The evaluation of the efficiency of such a method is given in the example of the explosive processing of hard alloys.

The principles of manufacturing complex carbide compounds based on titanium

“…For these operations, standard equipment was selected, such as a hydriding unit, drying ovens, jaw crushers, ball mills, and vibratory sieves. Main attention in the development of SHS technology was given to the investigation of the synthesis process, as well as those operations that had special requirements related to the synthesis [2,7]. The developed technology has a basic scheme: sponge titanium is subjected to gas embrittlement by hydriding in a hydrogen ow.…”

“…After mixing, the charge was dried in a cup distiller following this regime: Carbidization of the charge was conducted on a universal setup for self-propagating high-temperature synthesis SHS-100. [2,7,10] The initial charge for synthesis was placed in the reactor in a graphite or stainless steel cup as a loose ll or in the form of pressed briquettes with dimensions of d = 80 mm, l = 100-120 mm. Briquetting was performed on a 63-ton hydraulic press D242.8 in special steel molds.…”

“…For these alloys, an increase in strength and a decrease in hardness were observed with the growth of binder content. Other studies have shown that introducing chromium carbide into titanium carbide enhances the oxidation resistance of the resulting alloys [2,7,12]. It's evident that alloys based on solid titanium-chromium carbide are recommended as wear-resistant, high-reproof, and oxidation-resistant materials.…”

“…The tasks of accelerating scienti c and technical progress involve the development and wider implementation of advanced technologies and materials in all areas of engineering. They are associated with the intensi cation of production through the implementation of optimal, e cient, and comprehensive resource-saving use of secondary resources [2]. Titanium is the most expensive of the industrial structural metals.…”

“…The problem of tungsten economy in tool production, where it is widely used, is pressing. In this regard, there is a growing demand for titanium carbide and carbonitride powders, the need for which is increasing due to their high physical and mechanical properties (melting temperature, hardness, scale resistance, heat resistance, and others) [2]. Their application in the hard alloy industry will increase the possibility of replacing expensive and scarce tungsten-containing hard alloys with tools made from cemented carbides.…”