The Importance of Extractives and Abrasives in Wood Materials on the Wearing of Cutting Tools

Abstract

For many wood cutting processes, the interest of high-speed tool steels and tungsten carbides remains very important because of their good tool edge accuracy and easy grinding. The wear of high-speed steel and tungsten carbide is an important economic parameter. Wood extractives and silica have a potential adverse effect on tool wear. Rapid chemical wearing due to corrosion and mechanical wearing has been attributed to the presence of extractives and silica in wood and wood composites. This paper presents the wear characteristics of SKH51 high-speed steel and K10 tungsten carbide caused by extractive and abrasive materials present in the lesser-known Tapi-Tapi wood and wood composites of wood cement board, particleboard, MDF, and oriented strand board (OSB). Experimental results showed that wearing of the cutting tools tested was determined by extractives and silica contained in the wood and wood composites. Wood cement board, which is high in silica content, caused severe damage to the cutting edge of the high-speed steel. A corrosion/oxidation mechanism was found to contribute to the wear of SKH51 and K10 when cutting the Tapi-Tapi wood, MDF, particleboard, wood cement board, and OSB. The silica and extractives determined the abrasion and corrosion wear mechanism to a varying degree.

Properties of Particleboard Made from Oil Palm Trunks Added Magnesium Oxide as Fire Retardant

“…With larger 1000X magnification for Figure 2(a), the clear view of silica was observed in untreated OPT particleboard sample which is similar to the previous finding by Darmawan et al 22 The natural presence of silica in OPT particles could help to improve the flame retardant properties but at the same time may decrease the physical and mechanical properties of the prepared particleboard. 23 In Figure 2(b) with 1000X magnification, the presence of round shape magnesium oxide was observed scattered on the particles surface.…”

Influence of treatment with water-soluble CCB preservative on the physical-mechanical properties of brazilian tropical timber

“…Researches in matter of characterization of tropical wood species need to be further explored, since knowledge in this field is still incomplete, mainly due to growing demand for timber products and consequent the introduction of new fast growing tropical wood species, in recent years [22][23][24][25] . These species present medium to low density and must receive preservation treatment to ensure their durability in service.…”

Effect of Extractives on the Equilibrium Moisture Content and Shrinkage of Selected Tropical Wood Species

“…Tropical wood and wood composites are being machined in increasing quantities in many countries for building construction and decorative purposes. As tropical woods and wood composites are used extensively in many products, their properties are becoming more important (Darmawan et al 2012). To comparatively evaluate the sorption behavior of many wood species, the sorption isotherm of fir wood is usually used .…”