engleski

Machinability of Difficult Machining Materials

The assessment of the machinability rating of an engineering material is fundamental activity to increase the productivity and decrease the machining cost. It is also necessary to optimize materials selection in design of mechanical parts. However, it is not a simple task to summarize chemical, mechanical and tribological properties in simple statistical parameters and therefore a more reliable solution is to make machining tests. This paper deals with machinability index, short machinability testing, conventional machinability testing, effect of tool life data analysis on tool life equation, ISO standards for tool life testing ans computerized machinability data system developed according to the Integrated Machinability Testing Concept. The paper also illustrates the difficulties of machining some important materials such as: hardened steels, titanium alloys, nickel-based alloys and molybdenum alloys. In addition, some research results together with advanced solutions and innovative approaches proposed in recent research works are described.

Machining; Machinability testing; Hardened steels; Titanium alloys; Nickel-based alloys

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