The influence of built-up layer formation on cutting performance of GG25 grey cast iron
2016
Abstract The success of high speed machining of grey cast iron relates to the protective built-up layer (BUL) that forms on the tool. The present work investigates BUL formation on pcBN tools for dry, high speed machining of GG25 grey cast iron (up to v c = 750 m/min). This work suggests that the BUL distribution on the tool at high cutting speed ( v c = 750 m/min) is key to tool protection. Protection in the area of maximum cutting temperature is critical in preventing thermally driven wear modes, such as crater wear, found at low cutting speeds ( v c = 250 m/min).
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