COPPER BASED BINDER FOR THE FABRICATION OF DIAMOND TOOLS

摘要

This invention relates to powder metallurgy, more specifically, to composite material production methods, and can be used for the production of copper base binders for diamond tools sued in the construction industry and stone working, including different designs of segment cutting-off abrasive wheels used for highway and runway repairs, refurbishment of metallurgical plants and nuclear power plants, renovation of bridges and other structures, as well as drills and segment cutting-off abrasive wheels for cutting of high- strength reinforced concretes. Binder affects the design of a tool. It is the binder that determines the choice of the casing material and the method of bounding the diamond layer with the case. Physical and mechanical properties of binders determine potential shapes and sizes of abrasive diamond tools. The object of this invention is to provide diamond tool binders having a higher wear resistance without an essential increase in the required sintering temperature, as well as higher hardness, strength and impact toughness. Said object is achieved by adding a copper group metal as the main binder component and an alloying addition in the form of nanopowder. The copper base diamond tool binder of the first embodiment of the invention has the following components in the following ratios, wt.%: The copper base diamond tool binder of the other embodiment of the invention has the following components in the following ratios, wt.%: Cu = 30-60 Fe= 20-35 Co=10-15 Sn= 0-10.5 WC = 0-20 alloying addition = 0.01-5. The alloying addition is introduced in the form of 75-150 m2/g specific surface area nanopowder. The copper base diamond tool binder of the other embodiment of the invention has the following components in the following ratios, wt.%: Cu = 30-60 Fe= 20-35 Co=10-15 Sn= 0-10.5 WC = 0-20 alloying addition = 0.01-5. The alloying addition is introduced in the form of 75-150 m2/g specific surface area nanopowder.