This paper describes the technological process of manufacturing bimetallic billets, which are capable of operating at high pressures, high temperatures, and in corrosive environments, from VT-14 titanium alloy and 12KH18N10T stainless steel. To obtain a joint with a strength of at least 350 MPa, the diffusion welding method was used, which makes it possible to obtain equal-strength joints using dissimilar materials. The connection of VT-14 titanium alloy with 12KH18N10T stainless steel after obtaining bimetallic billets with the desired properties was investigated. We studied the welded VT-14 and 12KH18N10T joint obtained by diffusion welding through intermediate spacers of niobium Nb (NbStrip-1) and copper Cu (M1). On the basis of our investigations, the optimum welding modes are as follows: welding temperature: 1137 K; welding pressure: 18 MPa; welding time: 1200 s. Mechanical tests, tightness tests, and metallographic, factographic, and micro-X-ray structural studies were carried out, the results of which indicate the effectiveness of the proposed approach.

The article presents the problem associated with polymeric waste. The solution is proposed for the use of recycled polymer in road construction. The existing constructions of road surfaces, their main advantages and disadvantages are considered. The problem of utilization of domestic and industrial wastes is disclosed. The directions of using the products of plastic and rubber waste processing in road construction and in the construction of buildings are presented. Reuse of plastic waste contributes to reducing the impact of human life on the environment and the development of resource–saving technologies in road construction and building construction. The construction of the plastic road module from recycled plastic is developed. Module is resistant to rain and combustibles (oils and electrolytes), temperature extremes (–40 to +80 °C), has a high coefficient of adhesion of tyres (on a dry surface of 0,7 – 0,8, wet 0,3–0,4). The internal cavity of the module to accommodate communications (gas, communication lines, electrical equipment) and hatches for infiltration.

Based on the results of research on the theory of cutting of soil, ice and compacted snow, it is established that the cutting process of compacted snow formations does not significantly differ from cutting of a frozen soil. The article presents the theoretical description of process of interaction of the cutting edge snow plow blade with snow indurated formations, the experimentally obtained dependence of the components of cutting forces (horizontal, lateral and vertical) from the parameters of the cut (cutting angle from 15 – 90 ^о, cutting depth 10 – 40 mm, when the angle setting of snow plow blade 45°). The article defines optimal geometric conditions of installation of the snow blade that can be used in the development of new energy-efficient designs for snow working bodies, the improvement of existing technologies and snow removal. The application of optimal parameters in practice will allow to improve the quality of the road surfaces, the performance and efficiency of the snow machines without increasing its capacity, reduction of time, energy, and therefore, financial costs.

The paper presents an algorithm for non-parametric modeling of the process of cutting dense snow formations with snow plow blade. The following parameters are used as parameters involved in the model: cutting force components, width, cutting angles and installation of snow plow blade, depth of cut and physicomechanical properties of dense snow formations (density from 400 to 500 kg/m³). The initial data for the construction of the model were the results of experiments conducted on a laboratory model of snow plow blade for snow removal equipment. Optimization of the non-parametric regression model was carried out using evolutionary strategies, and the result was improved by local descent methods. The model is necessary to predict the course of the cutting process in a wide range of changes in the parameters in the process of studying and using it on full-scale real snow removal equipment.

The paper presents an analysis of the cutting tool structures for the destruction of frozen soils and snow-ice formations. The basic parameters (geometry and material) taken into account when creating cutting tools are revealed which are as follows: the influence of cutting speed on the durability of the cutting tool and cutting force, the optimal cutting angles and the layout of the cutters. The main advantages of using disc cutters in the design of ice-breaking equipment are presented. They allow you to replace the sliding friction of the cutting edge with the traditional rolling friction tooth (the disc rolls along the face). As a result, the tool life is increased, dynamic loads on the working body are reduced when meeting with the inclusions, since the contact of the cutting edge with the inclusions at the initial moment will be point, and the speed will decrease as it is immersed in the array, therefore, the load on the cutting tool will increase slowly.