Materials science characteristics of segment of circular saw used for concrete cutting
Ganna Kulakovska, Monika Gwoździk, Monika Strzelecka, Grzegorz Walczak, Zygmunt Nitkiewicz, Józef Żmudzki
Quarterly No. 3, 2013 pages 170-173
DOI:
keywords: powder metallurgy, diamond particles, circular saw segment
abstract The paper presents the results of studies on a segment of acircular saw used for cutting concrete. Usually, such products are manufactured by powder metallurgy methods with an addition of diamond particles. This manufacturing technology of such materials is aimed at obtaining a ‘self-sharpening’ effect. The effects consist in matrix abrasion during operation and in exposing the cutting diamonds, then their falling out and the following matrix abrasion. In the process of manufacturing such materials, such a matrix composition should be chosen so as to ensure that the diamond particles feature good adhesion. Because of that, the studies were aimed at determining uniformity of the diamond particles arrangement in a fracture of the studied segment, and determining the element distributions in the material matrix. Chemical composition point analyses were performed using the EDS method as well as element distribution maps in the product matrix. An X-ray phase analysis was carried out to evaluate the possibility of forming intermetallic compounds between the matrix components which could have formed during sintering.