Tips film: Ceramic milling in super alloy materials
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Thank you sir!
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@sandvikcoromant Thanks for the clarification.
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shit, if you ever get hit by one of this chips......
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1:37
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You don't get BUE in Inconel and Hastalloy? Or is the problem better described by the same explanation as to why all except old fashioned (Al203+Tic) ceramics are not good in plain steel?
johnstonebreaker 5 months ago
@johnstonebreaker Aisi 316 and 304 is quite far from super alloys. They are soft and sticky. The build up edge area is big for this family of steel. Use M line inserts, small engagement of the cutter and use high cutting speed (230-300 m/min).
For more details we recommend to contact your local Sandvik Coromant representative. In general there is no problem to do milling with carbide inserts in these materials.
sandvikcoromant 5 months ago
Since 316 SS is almost like a lower "super alloy" (nickel and chrome in there, just less of it than Inconel) would Sialon or whiskered ceramic work with it? I have tried a LOT of different carbide grades in 316 (and 304) but when it comes to milling, none of them really last worth a damn. Turning, however, I can live with Sandvik's carbide grades. They have been the best.
johnstonebreaker 6 months ago in playlist Milling tips
@johnstonebreaker Machining stainless steel such as AISI 316, with ceramic tools and inserts is almost impossible due to the geometry. The tool has negative or neutral lead angels and the inserts have no positive geometry but a negative champfer or a big er treatment. This has been tested but with no tool life. The main cause is the built up edge which is common in these materials. Some suppliers say they can do it but nobody has seen it for real. When we succeed, you will be the first to know!
sandvikcoromant 5 months ago
They say to NEVER use coolant...WELL, they don't say WHICH kind of ceramic they are talking about! "Whisker" ceramic (at least) used to RECOMMEND it! (at least in turning!) I don't know about "Sailon ceramics". It might have been a good idea for them to say WHAT TYPE OF CERAMIC!
johnstonebreaker 6 months ago
@johnstonebreaker We are talking about milling only. Weather it is sialon or whisker; by using no coolant, no matter what kind, you will see a minimum 30% increase in tool life. When using ceramics for turning you should always use coolant. 8-10% water soluble however. Good luck!
sandvikcoromant 6 months ago