Cermet has been gaining popularity as a cutting tool all over the world. Its ability to withstand heat and its superior wear resistance make it a popular choice, especially for automotive applications. However, manufacturing cermet cutting tools is an altogether different experience. Here are a few tips to make grinding cermet cutting tools easier:
1.) Be patient. Cermet can not be ground at cutting rates that match carbide, or for that matter, even pure ceramic cutting tools. Cermets typically contain high levels of titanium as a binder and this material smears and loads diamond grinding wheels very rapidly. Cutting rates for cermets vary, but are commonly 50% to 75% that of carbide.
2.) Cermet collects rapidly on the surface of the diamond grinding wheel. Plan to dress the wheel frequently, as you are cleaning, not dressing away the Cermet.
3.) As with all materials, grinding wheel speeds will vary. Typical cutting speeds for cermets should be on the slower side, around 4500 SFPM.
4.) Coolant, coolant, coolant!! Always provide as much coolant and coolant pressure to the grinding zone as possible. Flushing the grinding zone with clean water soluble coolant will make the entire process of grinding cermet much easier.
5.) When all else fails, call Abrasive Technology, we have solutions.