Influence of diamond component based on wurtzite boron nitride on wear resistance of cutting tool

The article is devoted to the study of the influence of the diamond component in a composite superhard material based on wurtzite boron nitride on the stability of the tool during turning of hardened steels in the mode of smooth turning and when processing intermittent surfaces. The aim of the work is to study the influence of the content of the diamond component in the composite superhard material based on wurtzite boron nitride on the stability of the tool.

Особливості регулювання структури лінійних блок-кополіуретанових композитів підвищеної зносостійкості

Досліджено вплив головних структурних параметрів (молекулярної маси та вмісту жорстких блоків) а також методів наповнення лінійних блок-кополіуретанів та їх композицій на рівень деформаційно-міцнісних, реологічних і триботехнічних характеристик. Запропоновано комплексний підхід до отримання поліуретанових композицій з підвищеною зносостійкістю.

Wear resistance of strengthened layers with nanocrystalline structure in friction with boundary lubrication

Friction treatment refers to surface strengthening (hardening) methods using highly concentrated energy sources. The source of thermal energy occurs in the contact area of the tool-part due to high-speed friction (60–90 m/s) of the tool on the treated surface. The heating rate of the metal surface layer is 105–106 K/s. After moving the energy source from the contact zone, high-speed cooling of the surface layer of the metal takes place. The cooling rate is 104–5∙105 K/s.

Prediction of tribological properties of structural steels using artificial neural networks

The effect of quenching temperature on wear resistance of 40Kh steel after tempering has been investigated. It was found that compared to standard heat treatment, quenching from 1050 °С and high temperature tempering increase its tribological characteristics. The character of fracture of the contacting surfaces was studied. It was shown that in the specimens quenched from 860 °С and tempered, the fracture of the contact surface occurs by the mechanisms of smooth splitting and delamination with plastic deformation.

Structure and wear resistance of aluminium alloys coated with surface layer laser-modified by silicon carbide

Modern approaches to ensuring the necessary characteristics of surface of a material with the aim to improve economic and technological characteristics of the structures are considered in this paper. It is shown that aluminium alloys gain wide application in industry. Nevertheless, surface characteristics of materials are insufficiently good for their use in structures which operate under abrasive wearing and boundary friction.

Regulation of the phase-structural composition and metastability of austenite by alloying elements and parameters of tempering for increase wear-resistance of Fe-Cr-Mn deposited steel

It is shown that under the influence of alloying (Cr, Mn, C, Si, Ti, N, V) during electric arc hardfacing with a flux cored wire, as well as technological tempering parameters at temperatures of 300...700°C, the phase-structural composition of the cost-saving alloyed deposited steel (from 0 to 75 % quenching martensite and austenite), the degree of metastability of austenite are regulated.

Оптимізація технології наплавлення зносостійких шарів на плоскі елементи конструкцій

The influence of the profile, surfacing on the formation of the weld by automatic submerged arc wire with powder brand CW80Cr20B3Ti. As a result, design of experiments established the relationship between the geometric dimensions of the seam and the depth of penetration of current value and welding speed. The resulting optimal mode of deposition used in forming the roller for extra vibration substrate.