Mechanochemical Fracture of the Components of Wood-Cutting Equipment

• Published in: Materials science (New York, N.Y.) Vol. 50; no. 1; pp. 148 - 155
• Main Authors: Pamfilov, Е. А., Lukashov, S. V., Prozorov, Ya. S.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01-07-2014; Springer; Springer Nature B.V
• Subjects: Abrasive cutting; Abrasive wear; Analysis; Carboxylic acids; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composite materials; Corrosion; Corrosion and anti-corrosives; Corrosive wear; Cutting equipment; Cutting wear; Energy consumption; Entrainment; Friction; Friction resistance; Galvanic corrosion; Hydrogenation; Manufacturing; Materials Science; Mechanical components; Organic acids; Penetration resistance; Phase composition; Raw materials; Regularity; Sand; Solid Mechanics; Structural Materials; Surface layers; Wear; Wear particles; Wear rate; Wear resistance; Wood; Woodworking machinery; wood; friction units; polyphenol compounds; hydrogenation; carboxylic acids; wear resistance
• ISSN: 1068-820X; 1573-885X
• DOI: 10.1007/s11003-014-9703-x

We study the operating conditions, mechanisms, and regularities of wear of the surfaces of the friction units of chippers. We recorded a complex set of phenomena in the friction zone of the cutter shaft (or the cutting drum) and wood, which reveals the predominance of the corrosion-mechanical type of wear. It is shown that water, carboxylic acids, and polyphenol compounds most strongly affect the character of wear and wear rate. The mechanical component of wear in friction against wood is caused by the entrainment of dispersed wear particles in the contact zone, the appearance of abrasive particles (earth, sand, and clay) together with machined wood, or the penetration of these particles in the junctions of the chipper from the outer medium. The influence of hydrogenation of the surface on the wear resistance of the material of the components of woodworking machinery is established. We analyze the regularities and mechanisms of wear of the components of the friction units of chippers, formulate the requirements to the choice of the method of improvement the wear resistance, and theoretically justify the structural-phase composition and the physicochemical properties of the surface layer of the analyzed components.